Home 1975 Summary
1974 spacecrafts 1976 spacecrafts
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The 168 spacecrafts launched in 1975 :
1) Soyuz 17 2) Kosmos 702 / Zenit-2M 3) Kosmos 703 / DS-P1-Yu 70 4) Landsat 2 / ERTS 2
5) Kosmos 704 / Zenit-4MK 6) Kosmos 705 / DS-P1-Yu 75 7) Kosmos 706 / Oko 8) Kosmos 707 / Tselina-O
9) Molniya 2-12 10) Starlette 11) SMS 2 12) Kosmos 708 / Sfera
13) Kosmos 709 / Zenit-4MK 14) Intelsat 4G 15) SRATS / Taiyo 16) Kosmos 710 / Zenit-4MK
17) Kosmos 711 / Strela-1M 18) Kosmos 712 / Strela-1M 19) Kosmos 713 / Strela-1M 20) Kosmos 714 / Strela-1M
21) Kosmos 715 / Strela-1M 22) Kosmos 716 / Strela-1M 23) Kosmos 717 / Strela-1M 24) Kosmos 718 / Strela-1M
25) SDS 3 / Jumpseat 4 26) Kosmos 719 / Zenit-4MK 27) Kosmos 720 / Zenit-4MT (Orion) 28) Kosmos 721 / Zenit-2M
29) Nauka [19] 30) Kosmos 722 / Zenit-4MK 31) Intercosmos 13 32) Meteor 1-21
33) Kosmos 723 / US-A 34) April 5 anomaly 35) Kosmos 724 / US-A 36) Kosmos 725 / DS-P1-Yu 77
37) GEOS 3 38) Kosmos 726 / Parus 39) P72-2 40) Molniya 3-2
41) Kosmos 727 / Zenit-4MK 42) Kosmos 728 / Zenit-2M 43) Nauka [20] 44) Titan Samos 44 / KH-8 44 GAMBIT
45) Aryabhata 46) Kosmos 729 / Tsiklon 47) Kosmos 730 / Zenit-4MK 48) Molniya 1-29
49) Explorer 53 / SAS 3 50) Anik 3 / Telesat C 51) D5-A Pollux 52) D5-B / Castor
53) DSCS 2-5 54) DSCS 2-6 55) Kosmos 731 / Zenit-2M 56) Nauka [21]
57) Intelsat 4H 58) Block 5C (#3) / DMSP Block-5C F2 59) Soyuz 18 60) Kosmos 732 / Strela-1M
61) Kosmos 733 / Strela-1M 62) Kosmos 734 / Strela-1M 63) Kosmos 735 / Strela-1M 64) Kosmos 736 / Strela-1M
65) Kosmos 737 / Strela-1M 66) Kosmos 738 / Strela-1M 67) Kosmos 739 / Strela-1M 68) Kosmos 740 / Zenit-4MK
69) Kosmos 741 / Gektor-Priroda 70) Intercosmos 71) Kosmos 742 / Zenit-4MK 72) Molniya 1-30
73) SRET 2 74) Venera 9 75) Big Bird 10 / KH-9 10 HEXAGON 76) SSU 1
77) Nimbus 6 78) Kosmos 743 / Zenit-4MK 79) Venera 10 80) CANYON 6
81) Kosmos 744 / Tselina-D 82) OSO 8 83) Kosmos 745 / DS-P1-Yu 76 84) Kosmos 746 / Zenit-4MK
85) Kosmos 747 / Zenit-2M 86) Nauka [22] 87) Kosmos 748 / Zenit-4MK 88) Kosmos 749 / Tselina-O
89) Molniya 2-13 90) Meteor 2-4 91) Soyuz 19 92) Apollo ASTP
93) Kosmos 750 / DS-P1-I 15 94) Kosmos 751 / Zenit-2M 95) Kosmos 752 / Vektor 96) JSSW 3 ("Chinasat 3")
97) Kosmos 753 / Zenit-4MK 98) COS B 99) Kosmos 754 / Zenit-4MK 100) Kosmos 755 / Parus
101) Viking 1 Orbiter 102) Viking 1 Lander 103) Kosmos 756 / Tselina-D 104) Symphonie 2
105) Kosmos 757 / Zenit-4MK 106) Molniya 1-31 107) Kosmos 758 / Yantar'-2K 3 108) Molniya 2-14
109) ETS 1 / Kiku-1 110) Viking 2 Orbiter 111) Viking 2 Lander 112) Kosmos 759 / Zenit-4MT (Orion)
113) Kosmos 760 / Zenit-4MK 114) Kosmos 761 / Strela-1M 115) Kosmos 762 / Strela-1M 116) Kosmos 763 / Strela-1M
117) Kosmos 764 / Strela-1M 118) Kosmos 765 / Strela-1M 119) Kosmos 766 / Strela-1M 120) Kosmos 767 / Strela-1M
121) Kosmos 768 / Strela-1M 122) Meteor 1-22 123) Kosmos 769 / Zenit-2M 124) Kosmos 770 / Sfera
125) Kosmos 771 / Zenit-4MKT (Fram) 126) Intelsat 4A F-1 127) D-2B Aura 128) Kosmos 772  (Soyuz)
129) Kosmos 773 / Strela-2 130) Kosmos 774 / Zenit-4MK 131) Explorer 54 / AE-D 132) Kosmos 775 / Oko? / SPRN No. 1
133) Titan Samos 45 / KH-8 45 GAMBIT 134) TIP 2 / Triad 2 135) Luna 136) GOES 1 / SMS 3
137) Kosmos 776 / Zenit-2M 138) Nauka [23] 139) Kosmos 777 / US-P 140) Kosmos 778 / Parus
141) Kosmos 779 / Zenit-4MK 142) Molniya 3-3 143) Soyuz 20 144) Explorer 55 / AE-E
145) Kosmos 780 / Zenit-2M 146) Nauka [24] 147) Kosmos 781 / Tselina-O 148) Kosmos 782 / Bion 3
149) FSW 1-01 ("Chinasat 4") 150) Kosmos 783 / Strela-2 151) Kosmos 784 / Zenit-2M 152) Nauka [25]
153) Big Bird 11 / KH-9 11 HEXAGON 154) Hitchhiker 38 155) Explorer / DAD-A 156) Explorer / DAD-B
157) Intercosmos 14 158) Kosmos 785 / US-A 159) RCA Satcom 1 160) IMEWS 5 / DSP 8
161) JSSW 4 (Chinasat 5") 162) Kosmos 786 / Zenit-4MK 163) Molniya 2-15 164) Kosmos / I2P (Lira)
165) Prognoz 4 166) Raduga 1 (Statsionar-1) 167) Meteor 1-23 164) Molniya 3-4
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Spacecraft Entries
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Soyuz 17
Spacecraft:  Soyuz 7K-T No. 38
Numbers: 1975 payload #1 ; 1975-001A ; 2069th spacecraft.
Type: Piloted spacecraft
Sponsor: Soviet Union (Korolev's Design Bureau)
Launch: 11 January 1975 at 21h43 UTC, from Baykonur Cosmodrome's LC-1, by an A-2/Soyuz (11A511).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Kosmos 702
Spacecraft:  Zenit-2M
Numbers: 1975 payload #2 ; 1975-002A ; 2070th spacecraft.
Type: Reconnaissance
Sponsor: Soviet Union's Defense ministry
Launch: 17 January 1975 at 9h07 UTC, from Baykonur Cosmodrome's LC-31, by an A-2/"Voskhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Kosmos 703
Spacecraft:  DS-P1-Yu No. 70
Numbers: 1975 payload #3 ; 1975-003A ; 2071st spacecraft.
Type: Military technologies
Sponsor: Soviet Union's Defense ministry
Launch: 21 January 1975 at 11h05 UTC, from Plesetsk Cosmodrome's LC-133/1, by a Kosmos B-1 (11K63).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Landsat 2 / ERTS 2
Spacecraft:  Landsat B / ERTS B
Numbers: 1975 payload #4 ; 1975-004A ; 2072nd spacecraft.
Type: Earth remote sensing
Sponsor: NASA
Launch: 22 January 1975 at 17h56 UTC, from Vandenberg Air Force Base's SLC-2W, by a Delta 2310 (Delta 2910 598 / Delta 107).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Kosmos 704
Spacecraft:  Zenit-4MK
Numbers: 1975 payload #5 ; 1975-005A ; 2073rd spacecraft.
Type: Reconnaissance
Sponsor: Soviet Union's Defense ministry
Launch: 23 January 1975 at 11h02 UTC, from Plesetsk Cosmodrome's LC-41/1, by an A-2/"Voskhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Kosmos 705
Spacecraft:  DS-P1-Yu No. 75
Numbers: 1975 payload #6 ; 1975-006A ; 2074th spacecraft.
Type: Military technologies
Sponsor: Soviet Union's Defense ministry
Launch: 28 January 1975 at 12h05 UTC, from Plesetsk Cosmodrome's LC-133/1, by a Kosmos B-1 (11K63).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Kosmos 706
Spacecraft:  Oko
Numbers: 1975 payload #7 ; 1975-007A ; 2075th spacecraft.
Type: Missible early warning
Sponsor: Soviet Union's Defense ministry
Launch: 30 January 1975 at 15h02 UTC, from Plesetsk Cosmodrome's LC-41/1, by an A-2-e/"Molniya" (8K78M).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Kosmos 707
Spacecraft:  Tselina-O
Numbers: 1975 payload #8 ; 1975-008A ; 2076th spacecraft.
Type: Electronic intelligence
Sponsor: Soviet Union's Defense ministry
Launch: 5 February 1975 at 13h12 UTC, from Plesetsk Cosmodrome's LC-132, by a Kosmos C-1 (11K65M 53753-212).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Molniya 2-12
Spacecraft: 
Numbers: 1975 payload #9 ; 1975-009A ; 2077th spacecraft.
Type: Communications
Sponsor: Soviet Union
Launch: 6 February 1975 at 4h48 UTC, from Plesetsk Cosmodrome's LC-41/1, by an A-2-e/"Molniya" (8K78M).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Starlette
Spacecraft: 
Numbers: 1975 payload #10 ; 1975-010A ; 2078th spacecraft.
Type: Geodesy
Sponsor: France's CNES
Launch: 6 February 1975 at 16h35 UTC, from Kourou Space Center's ELD, by a Diamant BP.4 (No. 1).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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SMS 2
Spacecraft:  SMS B ; Synchronous Meteorological Satellite
Numbers: 1975 payload #11 ; 1975-011A ; 2079th spacecraft.
Type: Meteorology
Sponsor: NASA
Launch: 6 February 1975 at 22h04 UTC, from Cape Canaveral's LC-17B, by a Delta 2914 (Delta 2914 593 / Delta 108).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Kosmos 708
Spacecraft:  Sfera
Numbers: 1975 payload #12 ; 1975-012A ; 2080th spacecraft.
Type: Geodesy
Sponsor: Soviet Union
Launch: 12 February 1975 at 3h21 UTC, from Plesetsk Cosmodrome's LC-132, by a Kosmos C-1 (11K65M 53749-166).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Kosmos 709
Spacecraft:  Zenit-4MK
Numbers: 1975 payload #13 ; 1975-013A ; 2081st spacecraft.
Type: Reconnaissance
Sponsor: Soviet Union's Defense ministry
Launch: 12 February 1975 at 14h38 UTC, from Plesetsk Cosmodrome's LC-41/1, by an A-2/"Voskhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Intelsat 4G
Spacecraft:  Intelsat 4 F-6
Numbers: 1975 payload #14 ; 1975 1st loss ; 2082nd spacecraft.
Type: Communications
Sponsor: Intelsat
Launch: 20 February 1975 at 23h34 UTC, from Cape Canaveral's LC-36A, by an Atlas-Centaur (Atlas SLV-3D AC-33 / Centaur D-1AR 5015D).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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SRATS / TaIyo
Spacecraft:  SS-03
Numbers: 1975 payload #15 ; 1975-014A ; 2083rd spacecraft.
Type: Earth upper atmosphere studies
Sponsor: Japan's ISAS
Launch: 24 February 1975 at 5h25 UTC, from Kagoshima Space Center's M, by a Mu-3S (M-3C-2).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Kosmos 710
Spacecraft:  Zenit-4MK
Numbers: 1975 payload #16 ; 1975-015A ; 2084th spacecraft.
Type: Reconnaissance
Sponsor: Soviet Union's Defense ministry
Launch: 26 February 1975 at 9h07 UTC, from Baykonur Cosmodrome's LC-31, by an A-2/"Voskhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Kosmos 711
Spacecraft:  Strela-1M
Numbers: 1975 payload #17 ; 1975-016A ; 2085th spacecraft.
Type: Communications (store/dump)
Sponsor: Soviet Union's Defense ministry
Launch: 28 February 1975 at 13h55 UTC, from Plesetsk Cosmodrome's LC-132, by a Kosmos C-1 (11K65M 53749-157).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Kosmos 712
Spacecraft:  Strela-1M
Numbers: 1975 payload #18 ; 1975-016B ; 2086th spacecraft.
Type: Communications (store/dump)
Sponsor: Soviet Union's Defense ministry
Launch: 28 February 1975 at 13h55 UTC, from Plesetsk Cosmodrome's LC-132, by a Kosmos C-1 (11K65M 53749-157).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Kosmos 713
Spacecraft:  Strela-1M
Numbers: 1975 payload #19 ; 1975-016C ; 2087th spacecraft.
Type: Communications (store/dump)
Sponsor: Soviet Union's Defense ministry
Launch: 28 February 1975 at 13h55 UTC, from Plesetsk Cosmodrome's LC-132, by a Kosmos C-1 (11K65M 53749-157).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Kosmos 714
Spacecraft:  Strela-1M
Numbers: 1975 payload #20 ; 1975-016D ; 2088th spacecraft.
Type: Communications (store/dump)
Sponsor: Soviet Union's Defense ministry
Launch: 28 February 1975 at 13h55 UTC, from Plesetsk Cosmodrome's LC-132, by a Kosmos C-1 (11K65M 53749-157).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Kosmos 715
Spacecraft:  Strela-1M
Numbers: 1975 payload #21 ; 1975-016E ; 2089th spacecraft.
Type: Communications (store/dump)
Sponsor: Soviet Union's Defense ministry
Launch: 28 February 1975 at 13h55 UTC, from Plesetsk Cosmodrome's LC-132, by a Kosmos C-1 (11K65M 53749-157).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Kosmos 716
Spacecraft:  Strela-1M
Numbers: 1975 payload #22 ; 1975-016F ; 2090th spacecraft.
Type: Communications (store/dump)
Sponsor: Soviet Union's Defense ministry
Launch: 28 February 1975 at 13h55 UTC, from Plesetsk Cosmodrome's LC-132, by a Kosmos C-1 (11K65M 53749-157).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Kosmos 717
Spacecraft:  Strela-1M
Numbers: 1975 payload #23 ; 1975-016G ; 2091st spacecraft.
Type: Communications (store/dump)
Sponsor: Soviet Union's Defense ministry
Launch: 28 February 1975 at 13h55 UTC, from Plesetsk Cosmodrome's LC-132, by a Kosmos C-1 (11K65M 53749-157).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Kosmos 718
Spacecraft:  Strela-1M
Numbers: 1975 payload #24 ; 1975-016H ; 2092nd spacecraft.
Type: Communications (store/dump)
Sponsor: Soviet Union's Defense ministry
Launch: 28 February 1975 at 13h55 UTC, from Plesetsk Cosmodrome's LC-132, by a Kosmos C-1 (11K65M 53749-157).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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SDS 3 / Jumpseat 4
Spacecraft: 
Numbers: 1975 payload #25 ; 1975-017A ; 2093rd spacecraft.
Type: Electronic intelligence
Sponsor: U.S. Air Force
Launch: 10 March 1975 at 4h41 UTC, from Vandenberg Air Force Base's SLC-4W, by a Titan 34B (3B-50 (34B-1) / Ascent Agena D).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Kosmos 719
Spacecraft:  Zenit-4MK
Numbers: 1975 payload #26 ; 1975-018A ; 2094th spacecraft.
Type: Reconnaissance
Sponsor: Soviet Union's Defense ministry
Launch: 12 March 1975 at 8h52 UTC, from Baykonur Cosmodrome's LC-31, by an A-2/"Voskhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Kosmos 720
Spacecraft:  Zenit-4MT (Orion)
Numbers: 1975 payload #27 ; 1975-019A ; 2095th spacecraft.
Type: Reconnaissance
Sponsor: Soviet Union's Defense ministry
Launch: 21 March 1975 at 6h57 UTC, from Plesetsk Cosmodrome's LC-43/3, by an A-2/Soyuz (11A511U).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Kosmos 721
Spacecraft:  Zenit-2M
Numbers: 1975 payload #28 ; 1975-020A ; 2096th spacecraft.
Type: Reconnaissance
Sponsor: Soviet Union's Defense ministry
Launch: 26 March 1975 at 8h52 UTC, from Plesetsk Cosmodrome's LC-41/1, by an A-2/"Voskhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Nauka
Spacecraft:  [Nauka #19]
Numbers: 1975 payload #29 ; 1975-020F ; 2097th spacecraft.
Type: Science & technology
Sponsor: Soviet Union's Defense ministry
Launch: 26 March 1975 at 8h52 UTC, from Plesetsk Cosmodrome's LC-41/1, by an A-2/"Voskhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's Master Catalog ; TRW Space Log ;
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Kosmos 722
Spacecraft:  Zenit-4MK
Numbers: 1975 payload #30 ; 1975-021A ; 2098th spacecraft.
Type: Reconnaissance
Sponsor: Soviet Union's Defense ministry
Launch: 27 March 1975 at 8h09 UTC, from Baykonur CosmodromeZ's LC-31, by an A-2/"Voskhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Intercosmos 13
Spacecraft:  DS-U2-IK No. 5
Numbers: 1975 payload #31 ; 1975-022A ; 2099th spacecraft.
Type: Earth/space studies
Sponsor: Soviet Union + East European countries
Launch: 27 March 1975 at 14h30 UTC, from Plesetsk Cosmodrome's LC-132/1, by a Kosmos C-1 (11K65M 53721-268).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Meteor 1-21
Spacecraft:  Meteor-MV
Numbers: 1975 payload #32 ; 1975-023A ; 2100 th spacecraft.
Type: Meteorology
Sponsor: Soviet Union
Launch: 1st April 1975 at 12h28 UTC, from Plesetsk Cosmodrome's LC-41/1, by an A-1/"Vostok" (8A92M).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Kosmos 723
Spacecraft:  US-A
Numbers: 1975 payload #33 ; 1975-024A ; 2101st spacecraft.
Type: Ocean surveillance ("RORSAT")
Sponsor: Soviet Union's Defense ministry
Launch: 2 April 1975 at 11h02 UTC, from Baykonur Cosmodrome's LC-90/20, by a F-1/Tsyklon 2.
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Soyuz' April 5, anomaly
Spacecraft:  Soyuz 7K-T No. 39
Numbers: 1975 payload #34 ; 1975 2nd loss ; 2102nd spacecraft.
Type: Piloted spacecraft
Sponsor: Soviet Union's Defense ministry
Launch: 5 April 1975 at 11h02 UTC, from Baykonur Cosmodrome's LC-1, by an A-2/Soyuz (11A511).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Kosmos 724
Spacecraft:  US-A
Numbers: 1975 payload #35 ; 1975-025A ; 2103rd spacecraft.
Type: Ocean surveillance ("RORSAT")
Sponsor: Soviet Union's Defense ministry
Launch: 7 April 1975 at 11h02 UTC, from Baykonur Cosmodrome's LC-90, by a F-1/Tsyklon 2.
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Kosmos 725
Spacecraft:  DS-P1-Yu No. 77
Numbers: 1975 payload #36 ; 1975-026A ; 2104th spacecraft.
Type: Military technologies
Sponsor: Soviet Union's Defense ministry
Launch: 8 April 1975 at 18h30 UTC, from Plesetsk Cosmodrome's LC-133/1, by a Kosmos B-1 (11K63).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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GEOS 3
Spacecraft:  GEOS C / Geodynamics Experimental Ocean Satellite
Numbers: 1975 payload #37 ; 1975-027A ; 2105th spacecraft.
Type: Meteorology
Sponsor: NASA
Launch: 9 April 1975 at 23h58 UTC, from Vandenberg Air Force Base's SLC-2W, by a Delta 2914 (Delta 2410 584 / Delta 109).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Kosmos 726
Spacecraft:  Parus
Numbers: 1975 payload #38 ; 1975-028A ; 2106th spacecraft.
Type: Navigation
Sponsor: Soviet Union's Defense ministry
Launch: 11 April 1975 at 7h55 UTC, from Plesetsk Cosmodrome's  LC-132, by a Kosmos C-1 (11K65M 65033-203).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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P72-2
Spacecraft: 
Numbers: 1975 payload #39 ; 1975 3rd loss ; 2107th spacecraft.
Type: Technology
Sponsor: U.S. Air Force
Launch: 13 April 1975 at 0h51 UTC, from Vandenberg Air Force Base's SLC-3W, by an Atlas F (Atlas 71F / Star-17A).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Molniya 3-2
Spacecraft:  Molniya-3 No. 12
Numbers: 1975 payload #40 ; 1975-029A ; 2108th spacecraft.
Type: Communications
Sponsor: Soviet Union
Launch: 14 April 1975 at 17h53 UTC, from Plesetsk Cosmodrome's LC-41/1, by an A-2-e/"Molniya" (8K78M).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Kosmos 727
Spacecraft:  Zenit-4MK
Numbers: 1975 payload #41 ; 1975-030A ; 2109th spacecraft.
Type: Reconnaissance
Sponsor: Soviet Union's Defense ministry
Launch: 16 April 1975 at 8h09 UTC, from Baykonur Cosmodrome's  LC-31, by an A-2/"Voskhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Kosmos 728
Spacecraft:  Zenit-2M
Numbers: 1975 payload #42 ; 1975-031A ; 2110th spacecraft.
Type: Reconnaissance
Sponsor: Soviet Union's Defense ministry
Launch: 18 April 1975 at 10h04 UTC, from Plesetsk Cosmodrome's LC-41/1, by an A-2/"Voskhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
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Nauka
Spacecraft:  [Nauka #20]
Numbers: 1975 payload #43 ; 1975-031G ; s2111th pacecraft.
Type: Science & technology
Sponsor: Soviet Union's Defense ministry
Launch: 18 April 1975 at 10h04 UTC, from Plesetsk Cosmodrome's LC-41/1, by an A-2/"Voskhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's Master Catalog ; TRW Space Log ;
.
Titan Samos 44 / KH-8 44 GAMBIT
Spacecraft:  OPS 4883
Numbers: 1975 payload #44 ; 1975-032A ; 2112th spacecraft.
Type: Reconnaissance
Sponsor: U.S. National Reconnaissance Office
Launch: 18 April 1975 at 16h48 UTC, from Vandenberg Air Force Base's SLC-4W, by a Titan 3B (3B-48 (24B-14) / Agena D).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Aryabhata
Spacecraft: 
Numbers: 1975 payload #45 ; 1975-033A ; 2113th spacecraft.
Type: Earth upper atmosphere studies
Sponsor: India' ISRO
Launch: 19 April 1975 at 7h40 UTC, from Kapustin Yar Cosmodrome's LC-107, by a Kosmos C-1 (11K65M 53731-279).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 729
Spacecraft:  Tsiklon
Numbers: 1975 payload #46 ; 1975-034A ; 2114th spacecraft.
Type: Navigation
Sponsor: Soviet Union's Defense ministry
Launch: 23 April 1975 at 21h07 UTC, from Plesetsk Cosmodrome's LC-132/1, by a Kosmos C-1 (11K65M 53731-274).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 730
Spacecraft:  Zenit-4MK
Numbers: 1975 payload #47 ; 1975-035A ; 2115th spacecraft.
Type: Reconnaissance
Sponsor: Soviet Union's Defense ministry
Launch: 24 April 1975 at 8h09 UTC, from Plesetsk Cosmodrome's LC-43/4, by an A-2/"Voskhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Molniya 1-29
Spacecraft: 
Numbers: 1975 payload #48 ; 1975-036A ; 2116th spacecraft.
Type: Communications
Sponsor: Soviet Union
Launch: 29 April 1975 at 10h33 UTC, from Plesetsk Cosmodrome's LC41/1, by an A-2-e/"Molniya" (8K78M).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Explorer 53 / SAS 3
Spacecraft:  SAS C
Numbers: 1975 payload #49 ; 1975-037A ; 2117th spacecraft.
Type: Solar observatory
Sponsor: NASA
Launch: 7 May 1975 at 22h45 UTC, from San Marco platform, by a Scout F-1 (S194C).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Anik 3 / Telesat C
Spacecraft:  Anik A-3
Numbers: 1975 payload #50 ; 1975-038A ; 2118th spacecraft.
Type: Communications
Sponsor: Telesat Canada
Launch: 7 May 1975 at 23h35 UTC, from Cape Canaveral's LC-17B, by a Delta 2914 (Delta 2914 596 / Delta 110).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
D5-A Pollux
Spacecraft: 
Numbers: 1975 payload #51 ; 1975-039A ; 2119th spacecraft.
Type: Technology
Sponsor: France's CNES
Launch: 17 May 1975 at 10h32 UTC, from Kourou Space Center's ELD, by a Diamant BP-4 (No. 2).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
D5-B Castor
Spacecraft: 
Numbers: 1975 payload #52 ; 1975-039B ; 2120th spacecraft.
Type: Technology
Sponsor: France's CNES
Launch: 17 May 1975 at 10h32 UTC, from Kourou Space Center's ELD, by a Diamant BP-4 (No. 2).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
DSCS 2-5 
Spacecraft:  OPS 9434 / DSCS II F-5 / DSCS II B-5
Defense Satellite Communications System
Numbers: 1975 payload #53 ; 1975-040A ; 2121st spacecraft.
Type: Communications
Sponsor: U.S. Air Force
Launch: 20 May 1975 at 14h03 UTC, from Cape Canaveral's LC-40, by aTitan 3C (23C-7 / Transtage-25).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ; Jonathan Space Report No. 495 ;
.
DSCS 2-6
Spacecraft:  OPS 9435 / DSCS II F-6 / DSCS II B-6
Defense Satellite Communications System
Numbers: 1975 payload #54 ; 1975-040B ; 2122nd spacecraft.
Type: Communications
Sponsor: U.S. Air Force
Launch: 20 May 1975 at 14h03 UTC, from Cape Canaveral's LC-40, by aTitan 3C (23C-7 / Transtage-25).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ; Jonathan Space Report No. 495 ;
.
Kosmos 731
Spacecraft:  Zenit-2M
Numbers: 1975 payload #55 ; 1975-041A ; 2123rd spacecraft.
Type: Reconnaissance
Sponsor: Soviet Union's Defense ministry
Launch: 21 May 1975 at 6h57 UTC, from Baykonur Cosmodrome's LC-31, by an A-2/"Voskhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Nauka
Spacecraft:  [Nauka #21]
Numbers: 1975 payload #56 ; 1975-041B ; 2124th spacecraft.
Type: Science & technology
Sponsor: Soviet Union's Defense ministry
Launch: 21 May 1975 at 6h57 UTC, from Baykonur Cosmodrome's LC-31, by an A-2/"Voshhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's Master Catalog ; TRW Space Log ;
.
Intelsat 4H
Spacecraft:  Intelsat IV F1
Numbers: 1975 payload #57 ; 1975-042A ; 2125th spacecraft.
Type: Communications
Sponsor: Intelsat
Launch: 22 May 1975 at 22h04 UTC, from Cape Canaveral's LC-36A, by an Atlas-Centaur (Atlas SLV-3D AC-35 / Centaur D-1AR 5018D).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Block 5C (#3) / DMSP Block-5C F2
Spacecraft:  DMSP 10533 / DMSP 5C F-2
Numbers: 1975 payload #58 ; 1975-043A ; 2126th spacecraft.
Type: Meteorology
Sponsor: U.S. Air Force
Launch: 24 May 1975 at 3h22 UTC, from Vandenberg Air Force Base's SLC-10W, by a Thor-Burner 2A (197).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Soyuz 18
Spacecraft:  Soyuz 7K-T No. 40
Numbers: 1975 payload #59 ; 1975-044A ; 2127th spacecraft.
Type: Piloted spacecraft
Sponsor: Soviet Union (Korolev's Design Bureau)
Launch: 24 May 1975 at 14h58 UTC, from Baykonur Cosmodrome's LC-1, by an A-2/Soyuz (11A511).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 732
Spacecraft:  Strela-1M
Numbers: 1975 payload #60 ; 1975-045A ; 2128th spacecraft.
Type: Communications (store/dump)
Sponsor: Soviet Union's Defense ministry
Launch: 28 May 1975 at 0h28 UTC, from Plesetsk Cosmodrome's LC-133/1, by a Kosmos C-1 (11K65M 53731-272).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 733
Spacecraft:  Strela-1M
Numbers: 1975 payload #61 ; 1975-045B ; 2129th spacecraft.
Type: Communications (store/dump)
Sponsor: Soviet Union's Defense ministry
Launch: 28 May 1975 at 0h28 UTC, from Plesetsk Cosmodrome's LC-133/1, by a Kosmos C-1 (11K65M 53731-272).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 734
Spacecraft:  Strela-1M
Numbers: 1975 payload #62 ; 1975-045C ; 2130th spacecraft.
Type: Communications (store/dump)
Sponsor: Soviet Union's Defense ministry
Launch: 28 May 1975 at 0h28 UTC, from Plesetsk Cosmodrome's LC-133/1, by a Kosmos C-1 (11K65M 53731-272).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 735
Spacecraft:  Strela-1M
Numbers: 1975 payload #63 ; 1975-045D ; 2131st spacecraft.
Type: Communications (store/dump)
Sponsor: Soviet Union's Defense ministry
Launch: 28 May 1975 at 0h28 UTC, from Plesetsk Cosmodrome's LC-133/1, by a Kosmos C-1 (11K65M 53731-272).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 736
Spacecraft:  Strela-1M
Numbers: 1975 payload #64 ; 1975-045E ; 2132nd spacecraft.
Type: Communications (store/dump)
Sponsor: Soviet Union's Defense ministry
Launch: 28 May 1975 at 0h28 UTC, from Plesetsk Cosmodrome's LC-133/1, by a Kosmos C-1 (11K65M 53731-272).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 737
Spacecraft:  Strela-1M
Numbers: 1975 payload #65 ; 1975-045F ; 2133rd spacecraft.
Type: Communications (store/dump)
Sponsor: Soviet Union's Defense ministry
Launch: 28 May 1975 at 0h28 UTC, from Plesetsk Cosmodrome's LC-133/1, by a Kosmos C-1 (11K65M 53731-272).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 738
Spacecraft:  Strela-1M
Numbers: 1975 payload #66 ; 1975-045G ; 2134th spacecraft.
Type: Communications (store/dump)
Sponsor: Soviet Union's Defense ministry
Launch: 28 May 1975 at 0h28 UTC, from Plesetsk Cosmodrome's LC-133/1, by a Kosmos C-1 (11K65M 53731-272).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 739
Spacecraft:  Strela-1M
Numbers: 1975 payload #67 ; 1975-045H ; 2135th spacecraft.
Type: Communications (store/dump)
Sponsor: Soviet Union's Defense ministry
Launch: 28 May 1975 at 0h28 UTC, from Plesetsk Cosmodrome's LC-133/1, by a Kosmos C-1 (11K65M 53731-272).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 740
Spacecraft:  Zenit-4MK
Numbers: 1975 payload #68 ; 1975-046A ; 2136th spacecraft.
Type: Reconnaissance
Sponsor: Soviet Union's Defense ministry
Launch: 28 May 1975 at 7h40 UTC, from Baykonur Cosmodrome's LC-31, by an A-2/"Voshhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 741
Spacecraft:  Gektor-Priroda
Numbers: 1975 payload #69 ; 1975-047A ; 2137th spacecraft.
Type: Earth remote sensing
Sponsor: Soviet Union
Launch: 30 May 1975 at 9h45 UTC, from Plesetsk Cosmodrome's LC-43/3, by an A-2/"Voshhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Intercosmos
Spacecraft:  DS-U3-IK No. 5
Numbers: 1975 payload #70 ; 1975 4th loss ; 2138th spacecraft.
Type: Earth/space studies
Sponsor: Soviet Union + East European countries
Launch: 3 June 1975 at 9h00 UTC, from Kapustin Yar Cosmodrome's LC-107/, by a Kosmos C-1 (11K65M 53721-257).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 742
Spacecraft:  Zenit-4MK
Numbers: 1975 payload #71 ; 1975-048A ; 2139th spacecraft.
Type: Reconnaissance
Sponsor: Soviet Union's Defense ministry
Launch: 3 June 1975 at 13h26 UTC, from Plesetsk Cosmodrome's LC-43/3, by an A-2/"Voshhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Molniya 1-30
Spacecraft:  Molniya-1 No. 24
Numbers: 1975 payload #72 ; 1975-049A ; 2140th spacecraft.
Type: Communications
Sponsor: Soviet Union
Launch: 5 June 1975 at 1h40 UTC, from Plesetsk Cosmodrome's LC-41/1, by an A-2-e/"Molniya" (8K78M).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
SRET 2
Spacecraft: 
Numbers: 1975 payload #73 ; 1975-049B ; 2141st spacecraft.
Type: Technology
Sponsor: France's CNES
Launch: 5 June 1975 at 1h40 UTC, from Plesetsk Cosmodrome's LC-41/1, by an A-2-e/"Molniya" (8K78M).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Venera 9
Spacecraft:  4V-1 No. 660
Numbers: 1975 payload #74 ; 1975-050A ; 2142nd spacecraft.
Type: Venus probe
Sponsor: Soviet Union (Korolev's Design Bureau)
Launch: 8 June 1975 at 2h38 UTC, from Baykonur Cosmodrome's LC-81P, by a D-1-e/Proton-K/D (8K82K 286-01 / 11S824).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Big Bird 10 / KH-9 10 HEXAGON
Spacecraft:  OPS 6381
Numbers: 1975 payload #75 ; 1975-051A ; 2143rd spacecraft.
Type: Reconnaissance
Sponsor: U.S. National Reconnaissance Office
Launch: 8 June 1975 at 18h30 UTC, from Vandenberg Air Force Base's SLC-4E, by a Titan 3D (23D-10).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
SSU 1
Spacecraft:  SSF-C No. 5
Numbers: 1975 payload #76 ; 1975-051C ; 2144th spacecraft.
Type: Electronic intelligence
Sponsor: U.S. Navy
Launch: 8 June 1975 at 18h30 UTC, from Vandenberg Air Force Base's SLC-4E, by a Titan 3D (23D-10).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Nimbus 6
Spacecraft:  Nimbus F
Numbers: 1975 payload #77 ; 1975-052A ; 2145th spacecraft.
Type: Meteorology
Sponsor: NASA
Launch: 12 June 1975 at 8h12 UTC, from Vandenberg Air Force Base's SLC-2W, by a Delta 2914 (Delta 2910 595 / Delta 111).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 743
Spacecraft:  Zenit-4MK
Numbers: 1975 payload #78 ; 1975-053A ; 2146th spacecraft.
Type: Reconnaissance
Sponsor: Soviet Union's Defense ministry
Launch: 12 June 1975 at 12h28 UTC, from Plesetsk Cosmodrome's LC-43/3, by an A-2/"Voshhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Venera 10
Spacecraft:  4V-1 No. 661
Numbers: 1975 payload #79 ; 1975-054A ; 2147th spacecraft.
Type: Venus probe
Sponsor: Soviet Union (Korolev's Design Bureau)
Launch: 14 June 1975 at 3h00 UTC, from Baykonur Cosmodrome's LC-81P, by a D-1-e/Proton-K/D (8K82K 285-02 / 11S824).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
CANYON 6
Spacecraft: Program 827's AFP-827 F6 (7506)
Numbers: 1975 payload #80 ; 1975-055A ; 2148th spacecraft.
Type: Electronic intelligence
Sponsor: United States' NRO / National Reconnaissance Office
Launch: 18 June 1975 at 10h00 UTC, from Cape Canaveral's LC-13, by an Atlas-Agena D (Atlas SLV-3A 5506A / Agena D A 2806).
Orbit: Geostationary
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ; Jonathan Space Report No. 501 ;
.
Kosmos 744
Spacecraft:  Tselina-D
Numbers: 1975 payload #81 ; 1975-056A ; 2149th spacecraft.
Type: Electronic intelligence
Sponsor: Soviet Union's Defense ministry
Launch: 20 June 1975 at 6h57 UTC, from Plesetsk Cosmodrome's LC-41/1, by an A-1/"Vostok" (8A92M).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
OSO 8
Spacecraft:  OSO I
Numbers: 1975 payload #82 ; 1975-057A ; 2150th spacecraft.
Type: Solar observatory
Sponsor: NASA
Launch: 21 June 1975 at 11h43 UTC, from Cape Canaveral's LC-17B, by a Delta 1914 (Delta 1910 586 / Delta 112).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 745
Spacecraft:  DS-P1-Yu No. 76
Numbers: 1975 payload #83 ; 1975-058A ; 2151st spacecraft.
Type: Military technologies
Sponsor: Soviet Union's Defense ministry
Launch: 24 June 1975 at 12h05 UTC, from Plesetsk Cosmodrome's LC-133/1, by a Kosmos B-1 (11K63).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 746
Spacecraft:  Zenit-4MK
Numbers: 1975 payload #84 ; 1975-059A ; 2152nd spacecraft.
Type: Reconnaissance
Sponsor: Soviet Union's Defense ministry
Launch: 25 June 1975 at 12h57 UTC, from Plesetsk Cosmodrome's LC-43/3, by an A-2/"Voshhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 747
Spacecraft:  Zenit-2M
Numbers: 1975 payload #85 ; 1975-060A ; 2153rd spacecraft.
Type: Reconnaissance
Sponsor: Soviet Union's Defense ministry
Launch: 27 June 1975 at 12h57 UTC, from Plesetsk Cosmodrome's LC-41/1, by an A-2/"Voshhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Nauka
Spacecraft:  [Nauka #22]
Numbers: 1975 payload #86 ; 1975-060F ; 2154th spacecraft.
Type: Science & technology
Sponsor: Soviet Union's Defense ministry
Launch: 27 June 1975 at 12h57 UTC, from Plesetsk Cosmodrome's LC-41/1, by an A-2/"Voshhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's Master Catalog ; TRW Space Log ;
.
Kosmos 748
Spacecraft: Zenit-4MK
Numbers: 1975 payload #87 ; 1975-061A ; 2155th spacecraft.
Type: Reconnaissance
Sponsor: Soviet Union's Defense ministry
Launch: 3 July 1975 at 13h40 UTC, from Plesetsk Cosmodrome's LC-41/1, by an A-2/"Voshhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 749
Spacecraft:  Tselina-O
Numbers: 1975 payload #88 ; 1975-062A ; 2156th spacecraft.
Type: Electronic intelligence
Sponsor: Soviet Union's Defense ministry
Launch: 4 July 1975 at 0h57 UTC, from Plesetsk Cosmodrome's LC-132/1, by a Kosmos C-1 (11K65M 53721-259).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Molniya 2-13
Spacecraft: 
Numbers: 1975 payload #89 ; 1975-063A ; 2157th spacecraft.
Type: Communications
Sponsor: Soviet Union
Launch: 8 July 1975 at 5h02 UTC, from Plesetsk Cosmodrome's LC-41/1, by an A-2-e/"Molniya" (8K78M).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Meteor 2-4
Spacecraft: 
Numbers: 1975 payload #90 ; 1975-064A ; 2158th spacecraft.
Type: Meteorology
Sponsor: Soviet Union
Launch: 11 July 1975 at 4h19 UTC, from Plesetsk Cosmodrome's LC-41/1, by an A-1/"Vostok" (8A92M).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Soyuz 19
Spacecraft:  Soyuz 7K-TM No. 75 (EPSA)
Numbers: 1975 payload #91 ; 1975-065A ; 2159th spacecraft.
Type: Piloted spacecraft
Sponsor: Soviet Union (Korolev's Design Bureau)
Launch: 15 July 1975 at 12h20 UTC, from Baykonur Cosmodrome's LC-1, by an A-2/Soyuz (11A511U).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Apollo ASTP
Spacecraft: Apollo CM-111 / DM-2 (Docking Module 2)
Apollo-Soyuz Test Project
Numbers: 1975 payload #92 ; 1975-066A ; 2160th spacecraft.
Type: Piloted spacecraft
Sponsor: NASA
Launch: 15 July 1975 at 19h50 UTC, from Cape Canaveral's LC-39B, by a Saturn IB (SA-210).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 750
Spacecraft:  DS-P1-I No. 15
Numbers: 1975 payload #93 ; 1975-067A ; 2161st spacecraft.
Type: Antimissile technologies
Sponsor: Soviet Union's Defense ministry
Launch: 17 July 1975 at 9h10 UTC, from Plesetsk Cosmodrome's LC-133/1, by a Kosmos B-1 (11K63).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 751
Spacecraft:  Zenit-2M
Numbers: 1975 payload #94 ; 1975-068A ; 2162nd spacecraft.
Type: Reconnaissance
Sponsor: Soviet Union's Defense ministry
Launch: 23 July 1975 at 12h57 UTC, from Plesetsk Cosmodrome's LC-43/3, by an A-2/"Voskhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 752
Spacecraft:  Vektor
Numbers: 1975 payload #95 ; 1975-069A ; 2163rd spacecraft.
Type: Radar calibration
Sponsor: Soviet Union's Defense ministry
Launch: 24 July 1975 at 18h57 UTC, from Plesetsk Cosmodrome's LC-132/1, by a Kosmos C-1 (11K65M 53721-254).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
JSSW 3 ("Chinasat 3")
Spacecraft:  Ji Shu Shiyan Weixing / Shuang Cheng Tzu 
Numbers: 1975 payload #96 ; 1975-070A ; 2164th spacecraft.
Type: Electronic intelligence
Sponsor: China
Launch: 26 July 1975 at 13h28 UTC, from Jiuquan's LA-2B, by a Feng Bao 1 (FB 1-4).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 753
Spacecraft:  Zenit-4MK
Numbers: 1975 payload #97 ; 1975-071A ; 2165th spacecraft.
Type: Reconnaissance
Sponsor: Soviet Union's Defense ministry
Launch: 31 July 1975 at 12h57 UTC, from Plesetsk Cosmodrome's LC-43/3, by an A-2/"Voskhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
COS B
Spacecraft: 
Numbers: 1975 payload #98 ; 1975-072A ; 2166th spacecraft.
Type: Technology
Sponsor: ESA / European Space Agency (CERS/ESRO)
Launch: 9 August 1975 at 1h48 UTC, from Vandenberg Air Force Base's SLC-2W, by a Delta 2914 (Delta 2913 602 / Delta 113).
Orbit:
Decayed: 18 January 1986
Mission: Eighth CERS/ESRO satellite, first European Space Agency satellite.
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log; Spacewarn No. 550 ;
.
Kosmos 754
Spacecraft:  Zenit-4MK
Numbers: 1975 payload #99 ; 1975-073A ; 2167th spacecraft.
Type: Reconnaissance
Sponsor: Soviet Union's Defense ministry
Launch: 13 August 1975 at 7h26 UTC, from Baykonur Cosmodrome's LC-31?, by an A-2/"Voskhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 755
Spacecraft:  Parus
Numbers: 1975 payload #100 ; 1975-074A ; 2168th spacecraft.
Type: Navigation
Sponsor: Soviet Union's Defense ministry
Launch: 14 August 1975 at 13h26 UTC, from Plesetsk Cosmodrome's LC-132/1, by a Kosmos C-1 (11K65M 53731-288).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Viking 1 Orbiter
Spacecraft: 
Numbers: 1975 payload #101 ; 1975-075A ; 2169th spacecraft.
Type: Mars probe
Sponsor: NASA
Launch: 20 August 1975 at 21h22 UTC, from Cape Canaveral's LC-41, by a Titan-3E/Centeru (Titan 3E TC-4 / Centaur D-1T E-4).
Orbit:
Decayed:
Mission:
Notes: On 13 July 1965, NASA invited scientists to propose, by August 15, the various experiments to be included in a continuing Voyager program of exploration of the planets. The Mars Voyager program would begin with a test flight in 1969 followed by an orbiter-lander flight in 1971 with other flights following in 1973, 1975, and beyond. The program would also include missions now under consideration for flights to Venus and other planets.
     On 20 July 1965, management of the Voyager landing capsule system had been assigned to the Jet Propulsion Laboratory, NASA announced. Harris M. Schurmeier, former Ranger Project Manager at JPL, had been named Voyager System Manager. Currently in a design study phase, [342] Voyager was planned for unmanned planetary explorations beginning with a Mars mission in 1971. 
     On 6 September 1965, NASA awarded $100,000 in initial funds to General Dynamics Corp.’s Convair Div. to determine vehicle design modifications and ground support requirements for combining the Centaur as a third stage with the two-stage Saturn IB launch vehicle. The combination was being proposed to launch unmanned Voyager spacecraft to Mars in 1971.
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; Astronautics and Aeronautics, 1965, p. 325 341, 418 ; TRW Space Log ;
.
Viking 1 Lander (Mutch Memorial Station)
Spacecraft: 
Numbers: 1975 payload #102 ; 1975-075C ; 2170th spacecraft.
Type: Mars probe
Sponsor: NASA

Source: NASA
Launch: 20 August 1975 at 21h22 UTC, from Cape Canaveral's LC-41, by a Titan-3E/Centeru (Titan 3E TC-4 / Centaur D-1T E-4).
Orbit:
Decayed:
Mission: At right, the Viking Lander 1 landing site photographed in 2006 by the Mars Reconnaissance Orbiter (see more). 
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 756
Spacecraft:  Tselina-D
Numbers: 1975 payload #103 ; 1975-076A ; 2171st spacecraft.
Type: Electronic intelligence
Sponsor: Soviet Union's Defense ministry
Launch: 22 August 1975 at 2h09 UTC, from Plesetsk Cosmodrome's LC-41/1, by an A-1/"Vostok" (8A92M).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Symphonie 2
Spacecraft:  Symphonie MV2
Numbers: 1975 payload #104 ; 1975-077A ; 2172nd spacecraft.
Type: Communications
Sponsor: France-Germany
Launch: 26 August 1975 at 1h42 UTC, from Cape Canaveral's LC-17A, by a Delta 2914 (Delta 2914 594 / Delta 114).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 757
Spacecraft:  Zenit-4MK
Numbers: 1975 payload #105 ; 1975-078A ; 2173rd spacecraft.
Type: Reconnaissance
Sponsor: Soviet Union's Defense ministry
Launch: 27 August 1975 at 14h52 UTC, from Plesetsk Cosmodrome's LC-41/1, by an A-2/"Voskhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Molniya 1-31
Spacecraft: 
Numbers: 1975 payload #106 ; 1975-079A ; 2174th spacecraft.
Type: Communications
Sponsor: Soviet Union
Launch: 2 September 1975 at 13h12 UTC, from Plesetsk Cosmodrome's LC-41/1, by an A-2-e/"Molniya" (8K78M).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 758
Spacecraft:  Yantar'-2K No. 3
Numbers: 1975 payload #107 ; 1975-080A ; 2175th spacecraft.
Type: Reconnaissance
Sponsor: Soviet Union's Defense ministry
Launch: 5 September 1975 at 14h52 UTC, from Plesetsk Cosmodrome's LC-43/3, by an A-2/Soyuz (11A511U).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Molniya 2-14
Spacecraft: 
Numbers: 1975 payload #108 ; 1975-081A ; 2176th spacecraft.
Type: Communications
Sponsor: Soviet Union
Launch: 9 September 1975 at 0h28 UTC, from Plesetsk Cosmodroem's LC-41/1, by an A-2-e/"Molniya" (8K78M).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
ETS 1 / Kiku-1
Spacecraft: 
Numbers: 1975 payload #109 ; 1975-082A ; 2177th spacecraft.
Type: Technology
Sponsor: Japan's NASDA
Launch: 9 September 1975 at 5h30 UTC, from Tanegashima Space Center's O, by a N-1 (N-1(F)).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Viking 2 Orbiter
Spacecraft: 
Numbers: 1975 payload #110 ; 1975-083A ; 2178th spacecraft.
Type: Mars probe
Sponsor: NASA
Launch: 9 September 1975 at 18h39 UTC, from Cape Canaveral's LC-41, by a Titan 3E/Centaur (TC-3 / Centaur D-1T E-3).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Viking 2 Lander
Spacecraft: 
Numbers: 1975 payload #111 ; 1975-083C ; 2179th spacecraft.
Type: Mars probe
Sponsor: NASA
Launch: 9 September 1975 at 18h39 UTC, from Cape Canaveral's LC-41, by a Titan 3E/Centaur (TC-3 / Centaur D-1T E-3).
Orbit:
Decayed:
Mission: At right, the Viking Lander 2 landing site photographed in 2006 by the Mars Reconnaissance Orbiter (see more). 
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 759
Spacecraft:  Zenit-4MT (Orion)
Numbers: 1975 payload #112 ; 1975-084A ; 2180th spacecraft.
Type: Reconnaissance
Sponsor: Soviet Union's Defense ministry
Launch: 12 September 1975 at 5h31 UTC, from Plesetsk Cosmodrome's LC-43/3, by an A-2/Soyuz (11A511U).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 760
Spacecraft:  Zenit-4MK
Numbers: 1975 payload #113 ; 1975-085A ; 2181st spacecraft.
Type: Reconnaissance
Sponsor: Soviet Union's Defense ministry
Launch: 16 September 1975 at 9h07 UTC, from Baykonur Cosmodrome's LC-31?, by an A-2/"Voskhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 761
Spacecraft:  Strela-1M
Numbers: 1975 payload #114 ; 1975-086A ; 2182nd spacecraft.
Type: Communications (store/dump)
Sponsor: Soviet Union's Defense ministry
Launch: 17 September 1975 at 7h12 UTC, from Plesetsk Cosmodrome's LC-132/1, by a Kosmos C-1 (11K65M 53746-311).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 762
Spacecraft:  Strela-1M
Numbers: 1975 payload #115 ; 1975-086B ; 2183rd spacecraft.
Type: Communications (store/dump)
Sponsor: Soviet Union's Defense ministry
Launch: 17 September 1975 at 7h12 UTC, from Plesetsk Cosmodrome's LC-132/1, by a Kosmos C-1 (11K65M 53746-311).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 763
Spacecraft:  Strela-1M
Numbers: 1975 payload #116 ; 1975-086C ; 2184th spacecraft.
Type: Communications (store/dump)
Sponsor: Soviet Union's Defense ministry
Launch: 17 September 1975 at 7h12 UTC, from Plesetsk Cosmodrome's LC-132/1, by a Kosmos C-1 (11K65M 53746-311).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 764
Spacecraft:  Strela-1M
Numbers: 1975 payload #117 ; 1975-086D ; 2185th spacecraft.
Type: Communications (store/dump)
Sponsor: Soviet Union's Defense ministry
Launch: 17 September 1975 at 7h12 UTC, from Plesetsk Cosmodrome's LC-132/1, by a Kosmos C-1 (11K65M 53746-311).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 765
Spacecraft:  Strela-1M
Numbers: 1975 payload #118 ; 1975-086E ; 2186th spacecraft.
Type: Communications (store/dump)
Sponsor: Soviet Union's Defense ministry
Launch: 17 September 1975 at 7h12 UTC, from Plesetsk Cosmodrome's LC-132/1, by a Kosmos C-1 (11K65M 53746-311).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 766
Spacecraft:  Strela-1M
Numbers: 1975 payload #119 ; 1975-086F ; 2187th spacecraft.
Type: Communications (store/dump)
Sponsor: Soviet Union's Defense ministry
Launch: 17 September 1975 at 7h12 UTC, from Plesetsk Cosmodrome's LC-132/1, by a Kosmos C-1 (11K65M 53746-311).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 767
Spacecraft:  Strela-1M
Numbers: 1975 payload #120 ; 1975-086G ; 2188th spacecraft.
Type: Communications (store/dump)
Sponsor: Soviet Union's Defense ministry
Launch: 17 September 1975 at 7h12 UTC, from Plesetsk Cosmodrome's LC-132/1, by a Kosmos C-1 (11K65M 53746-311).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 768
Spacecraft:  Strela-1M
Numbers: 1975 payload #121 ; 1975-086H ; 2189th spacecraft.
Type: Communications (store/dump)
Sponsor: Soviet Union's Defense ministry
Launch: 17 September 1975 at 7h12 UTC, from Plesetsk Cosmodrome's LC-132/1, by a Kosmos C-1 (11K65M 53746-311).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Meteor 1-22
Spacecraft:  Meteor-MV
Numbers: 1975 payload #122 ; 1975-087A ; 2190th spacecraft.
Type: Meteorology
Sponsor: Soviet Union
Launch: 18 September 1975 at 0h28 UTC, from Plesetsk Cosmodrome's LC-41/1, by an A-1/"Vostok" (8A92M).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 769
Spacecraft:  Zenit-2M
Numbers: 1975 payload #123 ; 1975-088A ; 2191st spacecraft.
Type: Reconnaissance
Sponsor: Soviet Union's Defense ministry
Launch: 23 September 1975 at 10h04 UTC, from Plesetsk Cosmodrome's LC-41/1, by an A-2/"Voskhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 770
Spacecraft:  Sfera
Numbers: 1975 payload #124 ; 1975-089A ; 2192nd spacecraft.
Type: Geodesy
Sponsor: Soviet Union
Launch: 24 September 1975 at 12h00 UTC, from Plesetsk Cosmodrome's LC-132/1, by a Kosmos C-1 (11K65M 53721-260).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 771
Spacecraft:  Zenit-4MKT / Fram
Numbers: 1975 payload #125 ; 1975-090A ; 2193rd spacecraft.
Type: Reconnaissance/Earth remote sensing
Sponsor: Soviet Union's Defense ministry
Launch: 25 September 1975 at 9h50 UTC, from Plesetsk Cosmodrome's LC-43/4, by an A-2/Soyuz (11A511U).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Intelsat 4A F-1
Spacecraft:  Intelsat IVA F1
Numbers: 1975 payload #126 ; 1975-091A ; 2194th spacecraft.
Type: Communications
Sponsor: Intelsat
Launch: 26 September 1975 at 0h17 UTC, from Cape Canaveral's LC-36B, by an Atlas-Centaur (Atlas SLV-3D(R) AC-36 / Centaur D-1AR 5016).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
D-2B Aura
Spacecraft: 
Numbers: 1975 payload #127 ; 1975-092A ; 2195th spacecraft.
Type: Astronomy
Sponsor: France's CNES
Launch: 27 September 1975 at 8h37 UTC, from Kourou Space Center's ELD, by a Diamant BP.4 (No. 3).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 772 (Soyuz)
Spacecraft:  Soyuz 7K-S No. 2L
Numbers: 1975 payload #128 ; 1975-093A ; 2196th spacecraft.
Type: Piloted spacecraft test
Sponsor: Soviet Union (Korolev's Design Bureau)
Launch: 29 September 1975 at 4h18 UTC, from Baykonur Cosmodrome's LC-1/LC-31?, by an A-2/Soyuz (11A511U).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 773
Spacecraft:  Strela-2
Numbers: 1975 payload #129 ; 1975-094A ; 2197th spacecraft.
Type: Communications (store/dump)
Sponsor: Soviet Union's Defense ministry
Launch: 30 September 1975 at 18h43 UTC, from Plesetsk Cosmodrome's LC-132/1, by a Kosmos C-1 (11K65M 53721-258).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 774
Spacecraft:  Zenit-4MK
Numbers: 1975 payload #130 ; 1975-095A ; 2198th spacecraft.
Type: Reconnaissance
Sponsor: Soviet Union's Defense ministry
Launch: 1st October 1975 at 8h38 UTC, from Baykonur Cosmodrome's LC-31?, by an A-2/"Voskhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Explorer 54 / AE-D
Spacecraft:  Atmospheric Explorer D
Numbers: 1975 payload #131 ; 1975-096A ; 2199th spacecraft.
Type: Earth upper atmosphere studies
Sponsor: NASA
Launch: 6 October 1975 at 9h00 UTC, from Vandenberg Air Force Base's SLC-2W, by a Delta 2914 (Delta 2910 600 / Delta 115).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 775
Spacecraft:  Oko? / SPRN No. 1
Numbers: 1975 payload #132 ; 1975-097A ; 2200th spacecraft.
Type: Missible early warning
Sponsor: Soviet Union's Defense ministry
Launch: 8 October 1975 at 0h30 UTC, from Baykonur Cosmodrome's LC-81L, by a D-1-e/Proton-K/DM (8K82K 286-02 / 11S86).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Titan Samos 45 / KH-8 45 GAMBIT
Spacecraft:  OPS 5499
Numbers: 1975 payload #133 ; 1975-098A ; 2201st spacecraft.
Type: Reconnaissance
Sponsor: U.S. National Reconnaissance Office
Launch: 9 October 1975 at 19h15 UTC, from Vandenberg Air Force Base's SLC-4W, by a Titan 3B (3B-47 (24B-13) / Agena D).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
TIP 2 / Triad 2
Spacecraft: 
Numbers: 1975 payload #134 ; 1975-099A ; 2202nd spacecraft.
Type: Navigation
Sponsor: U.S. Navy
Launch: 12 October 1975 at 6h39 UTC, from Vandenberg Air Force Base's SLC-5, by a Scout D-1 (S195C).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Luna
Spacecraft:  E-8-5M No. 412
Numbers: 1975 payload #135 ; 1975 5th loss ; 2203rd spacecraft.
Type: Lunar probe
Sponsor: Soviet Union (Korolev's Design Bureau)
Launch: 16 October 1975 at 4h04 UTC, from Baykonur Cosmodrome's LC-81L, by a D-1-e/Proton-K/D (8K82K 287-02 / 11S824).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
GOES 1 / SMS 3
Spacecraft:  Geostationary Operational Environmental Satellite
Numbers: 1975 payload #136 ; 1975-100A ; 2204th spacecraft.
Type: Meteorology
Sponsor: NASA
Launch: 16 October 1975 at 22h40 UTC, from Cape Canaveral's LC-17B, by a Delta 2914 (Delta 2914 597 / Delta 116).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 776
Spacecraft:  Zenit-2M
Numbers: 1975 payload #137 ; 1975-101A ; 2205th spacecraft.
Type: Reconnaissance
Sponsor: Soviet Union's Defense ministry
Launch: 17 October 1975 at 14h38 UTC, from Plesetsk Cosmodrome's LC-41/1, by an A-2/"Voskhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Nauka
Spacecraft:  [Nauka #23]
Numbers: 1975 payload #138 ; 1975-101A ; 2206th spacecraft.
Type: Science & technology
Sponsor: Soviet Union's Defense ministry
Launch: 17 October 1975 at 14h38 UTC, from Plesetsk Cosmodrome's LC-41/1, by an A-2/"Voshhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's Master Catalog ; TRW Space Log ;
.
Kosmos 777
Spacecraft:  US-P
Numbers: 1975 payload #139 ; 1975-102A ; 2207th spacecraft.
Type: Ocean surveillance ("RORSAT")
Sponsor: Soviet Union's Defense ministry
Launch: 29 October 1975 at 11h02 UTC, from Baykonur Cosmodrome's LC-90, by a F-1/Tsyklon 2.
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 778
Spacecraft:  Parus
Numbers: 1975 payload #140 ; 1975-103A ; 2208th spacecraft.
Type: Navigation
Sponsor: Soviet Union's Defense ministry
Launch: 4 November 1975 at 10h04 UTC, from Plesetsk Cosmodrome's LC-132/1, by a Kosmos C-1 (11K65M 53731-275).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 779
Spacecraft:  Zenit-4MK
Numbers: 1975 payload #141 ; 1975-104A ; 2209th spacecraft.
Type: Reconnaissance
Sponsor: Soviet Union's Defense ministry
Launch: 4 November 1975 at 15h21 UTC, from Plesetsk Cosmodrome's LC-43/3, by an A-2/"Voskhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Molniya 3-3
Spacecraft:  Molniya-3 No. 13
Numbers: 1975 payload #142 ; 1975-105A ; 2210th spacecraft.
Type: Communications
Sponsor: Soviet Union
Launch: 14 November 1975 at 19h14 UTC, from Plesetsk Cosmdrome's LC-43/3, by an A-2-e/"Molniya" ().
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Soyuz 20
Spacecraft:  Soyuz 7K-T(A9) No. 64
Numbers: 1975 payload #143 ; 1975-106A ; 2211st spacecraft.
Type: Piloted spacecraft test
Sponsor: Soviet Union (Korolev's Design Bureau)
Launch: 17 November 1975 at 14h37 UTC, from Baykonur Cosmodrome's LC-1/LC-31?, by an A-2/Soyuz (11A511U).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Explorer 55 / AE-E
Spacecraft:  Atmospheric Explorer-E
Numbers: 1975 payload #144 ; 1975-107A ; 2212th spacecraft.
Type: Earth upper atmosphere studies
Sponsor: NASA
Launch: 20 November 1975 at 2h06 UTC, from Cape Canaveral's LC-17B, by a Delta 2914 (Delta 2910 604 / Delta 117).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 780
Spacecraft:  Zenit-2M
Numbers: 1975 payload #145 ; 1975-108A ; 2213th spacecraft.
Type: Reconnaissance
Sponsor: Soviet Union's Defense ministry
Launch: 21 November 1975 at 9h21 UTC, from Baykonur Cosmodrome's LC-31?, by an A-2/"Voskhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Nauka
Spacecraft:  [Nauka #24]
Numbers: 1975 payload #146 ; 1975-108D ; 2214th spacecraft.
Type: Science & technology
Sponsor: Soviet Union's Defense ministry
Launch: 21 November 1975 at 9h21 UTC, from Baykonur Cosmodrome's LC-31?, by an A-2/"Voshhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's Master Catalog ; TRW Space Log ;
.
Kosmos 781
Spacecraft:  Tselina-O
Numbers: 1975 payload #147 ; 1975-109A ; 2215th spacecraft.
Type: Electronic intelligence
Sponsor: Soviet Union's Defense ministry
Launch: 21 November 1975 at 17h16 UTC, from Plesetsk Cosmodrome's LC-132/1, by a Kosmos C-1 (11K65M 53731-271).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 782
Spacecraft: Bion No. 3
Numbers: 1975 payload #148 ; 1975-110A ; 2216th spacecraft.
Type: Biology
Sponsor: Soviet Union
Launch: 25 November 1975 at 17h00 UTC, from Plesetsk Cosmodrome's LC-43/3, by an A-2/Soyuz (11A511U).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
FSW 1-01 ("Chinasat 4")
Spacecraft:  Fanhui Shi Weixing-1 No. 1
Numbers: 1975 payload #149 ; 1975-111A ; 2217th spacecraft.
Type: Reconnaissance
Sponsor: China
Launch: 26 November 1975 at 3h29 UTC, from Jiuquan's LA-2B, by a Chang Zheng 2C (CZ-2C-1).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 783
Spacecraft:  Strela-2
Numbers: 1975 payload #150 ; 1975-112A ; 2218th spacecraft.
Type: Communications (store/dump)
Sponsor: Soviet Union's Defense ministry
Launch: 28 November 1975 at 0h14 UTC, from Plesetsk Cosmodrome's LC-132/1, by a Kosmos C-1 (11K65M 53721-252).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 784
Spacecraft:  Zenit-2M
Numbers: 1975 payload #151 ; 1975-113A ; 2219th spacecraft.
Type: Reconnaissance
Sponsor: Soviet Union's Defense ministry
Launch: 3 December 1975 at 10h04 UTC, from Plesetsk Cosmodrome's LC-43/3, by an A-2/"Voskhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Nauka
Spacecraft:  [Nauka #25]
Numbers: 1975 payload #152 ; 1975-113G ; 2220th spacecraft.
Type: Science & technology
Sponsor: Soviet Union's Defense ministry
Launch: 3 December 1975 at 10h04 UTC, from Plesetsk Cosmodrome's LC-43/3, by an A-2/"Voshhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's Master Catalog ; TRW Space Log ;
.
Big Bird 11 / KH-9 11 HEXAGON
Spacecraft:  OPS 4428
Numbers: 1975 payload #153 ; 1975-114A ; 2221st spacecraft.
Type: Reconnaissance
Sponsor: U.S. National Reconnaissance Office
Launch: 4 December 1975 at 20h38 UTC, from Vandenberg Air Force Base's SLC-4E, by a Titan 3D (23D-13).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Hitchhiker 38
Spacecraft:  S3-2 / SSF 9
Numbers: 1975 payload #154 ; 1975-114B ; 2222nd spacecraft.
Type: Electronic intelligence
Sponsor: U.S. Air Force
Launch: 4 December 1975 at 20h38 UTC, from Vandenberg Air Force Base's SLC-4E, by a Titan 3D (23D-13).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Explorer / DAD-A
Spacecraft:  Dual Air Density-A
Numbers: 1975 payload #155 ; 1975 6th loss ; 2223rd spacecraft.
Type: Earth upper atmosphere studies
Sponsor: NASA
Launch: 6 December 1975 at 3h35 UTC, from Vandenberg Air Force Base's SLC-5, by a Scout F-1 (S196C).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Explorer / DAD-B
Spacecraft:  Dual Air Density-B
Numbers: 1975 payload #156 ; 1975 7th loss ; 2224th spacecraft.
Type: Earth upper atmosphere studies
Sponsor: NASA
Launch: 6 December 1975 at 3h35 UTC, from Vandenberg Air Force Base's SLC-5, by a Scout F-1 (S196C).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Intercosmos 14
Spacecraft:  DS-U2-IK No. 6
Numbers: 1975 payload #157 ; 1975-115A ; 2225th spacecraft.
Type: Earth upper atmosphere studies
Sponsor: Soviet Union + East European countries
Launch: 11 December 1975 at 17h00 UTC, from Plesetsk Cosmodrome's LC-132/1, by a Kosmos C-1 (11K65M 53746-308).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 785
Spacecraft:  US-A
Numbers: 1975 payload #158 ; 1975-116A ; 2226th spacecraft.
Type: Ocean surveillance ("RORSAT")
Sponsor: Soviet Union's Defense ministry
Launch: 12 December 1975 at 12h43 UTC, from Baykonur Cosmodrome's LC-90, by a F-1/Tsyklon 2.
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
RCA Satcom 1
Spacecraft:  RCA-A
Numbers: 1975 payload #159 ; 1975-117A ; 2227th spacecraft.
Type: Communications
Sponsor: RCA Communications
Launch: 13 December 1975 at 1h56 UTC, from Cape Canaveral's LC-17A, by a Delta 3914 (Delta 3914 607 / Delta 118).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
IMEWS 5 / DSP 8
Spacecraft:  DSP F5
Numbers: 1975 payload #160 ; 1975-118A ; 2228th spacecraft.
Type: Missile early warning
Sponsor: U.S. Air Force
Launch: 14 December 1975 at 5h15 UTC, from Cape Canaveral's LC-40, by a Titan 3C (23C-11).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ; DSP, A Pictorial ;
.
JSSW 4 ("Chinasat 5")
Spacecraft:  Ji Shu Shiyan Weixing
Numbers: 1975 payload #161 ; 1975-119A ; 2229th spacecraft.
Type: Electronic intelligence
Sponsor: China
Launch: 16 December 1975 at 9h19 UTC, from Jiuquan LA-2B, by a Feng Bao 1 (FB 1-5).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos 786
Spacecraft:  Zenit-4MK
Numbers: 1975 payload #162 ; 1975-120A ; 2230th spacecraft.
Type: Reconnaissance
Sponsor: Soviet Union's Defense ministry
Launch: 16 December 1975 at 9h50 UTC, from Baykonur Cosmodrome's LC-31?, by an A-2/"Voskhod" (11A57).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Molniya 2-15
Spacecraft: 
Numbers: 1975 payload #163 ; 1975-121A ; 2231st spacecraft.
Type: Communications
Sponsor: Soviet Union
Launch: 17 December 1975 at 11h16 UTC, from Plesetsk Cosmodrome's LC-43/3, by an A-2-e/"Molniya" (8K78M).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Kosmos
Spacecraft:  I2P (Lira)
Numbers: 1975 payload #164 ; 1975 8th loss ; 2232nd spacecraft.
Type: Antisatellite technologies
Sponsor: Soviet Union's Defense ministry
Launch: 19 December 1975, from Plesetsk Cosmodrome's LC-132/1, by a Kosmos C-1 (11K65M 53721-263).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Prognoz 4
Spacecraft:  SO-M No. 504
Numbers: 1975 payload #165 ; 1975-122A ; 2233rd spacecraft.
Type: Earth upper atmosphere studies
Sponsor: Soviet Union
Launch: 22 December 1975 at 2h09 UTC, from Baykonur Cosmodrome's LC-31, by an A-2-e/"Molniya" (8K78M / SOL).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Raduga 1
Spacecraft:  Gran' No. 11L (Statsionar-1)
Numbers: 1975 payload #166 ; 1975-123A ; 2234th spacecraft.
Type: Communications
Sponsor: Soviet Union
Launch: 22 December 1975 at 13h00 UTC, from Baykonur Cosmodrome's LC-81P, by a D-1-e/Proton-K/DM (8K82K 288-01 / 11S86 3L).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Meteor 1-23
Spacecraft:  Meteor-MV
Numbers: 1975 payload #167 ; 1975-124A ; 2235th spacecraft.
Type: Meteorology
Sponsor: Soviet Union
Launch: 25 December 1975 at 18h57 UTC, from Plesetsk Cosmodrome, by an A-1/"Vostok" (8A92M).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
Molniya 3-4
Spacecraft:  Molniya-3 No. 15
Numbers: 1975 payload #168 ; 1975-125A ; 2236th spacecraft.
Type: Communications
Sponsor: Soviet Union
Launch: 27 December 1975 at 10h22 UTC, from Plesetsk Cosmodrome's LC-43/3, by an A-2-e/"Molniya" (8K78M).
Orbit:
Decayed:
Mission:
Source: Jonathan McDowell's Master List ; Mark Wade’s Encyclopedia Astronautica ; National Space Science Data Center's ; TRW Space Log ;
.
© Claude Lafleur, 2004-10 Mes sites web: claudelafleur.qc.ca