Soyuz 20

Soyuz 20 (Russian: Союз 20, Union 20) was an unmanned spacecraft launched by the Soviet Union. It was a long-duration test of the Soyuz spacecraft that docked with the Salyut 4 space station. Soyuz 20 performed comprehensive checking of improved on-board systems of the spacecraft under various flight conditions. It also carried a biological payload. Living organisms were exposed to three months in space.

It was recovered on February 16, 1976.

Crew

None.

Mission parameters

Mass: 6,570 kg (14,480 lb)
Perigee: 177 km (110 mi)
Apogee: 251 km (156 mi)
Inclination: 51.6°
Period: 89.1 minutes

References

↑ "Baikonur LC1". Encyclopedia Astronautica. Retrieved 2009-03-04.

Soyuz human spaceflight programme

Main topics

Current missions

Soyuz MS-02

MS-03

Future missions

2017: Soyuz MS-04; MS-05; MS-06; MS-07
2018: Soyuz MS-08; MS-09; MS-10

Past missions
(by spacecraft type)

Soyuz 7K-OK (1966–1970)	Kosmos 133† Soyuz 7K-OK No.1† Kosmos 140 Soyuz 1† Kosmos 186 188 212 213 238 Soyuz 2 3 4 5 6 7 8 9

Soyuz 7K-L1 (1967–1970) (Zond lunar programme)	Kosmos 146 154† Zond 1967A† 1967B† Zond 4 1968A† 1968B† 5 6 1969A† Zond-M 1† M 2† Zond 7 8 9 10

Soyuz 7K-L1E (1969–1970)	Soyuz 7K-L1E No.1† Kosmos 382

Soyuz 7K-LOK (1971–1972)	Soyuz 7K-LOK No.1† No.2†

Soyuz 7K-OKS (1971)	Soyuz 10† 11†

Soyuz 7K-T (1972–1981)	Kosmos 496 573 Soyuz 12 Kosmos 613 Soyuz 13 Kosmos 656 Soyuz 14 15† 17 18a† 18 20 (uncrewed) 21 23† 24 25† 26 27 28 29 30 31 32 (uncrewed landing) 33† 34 (uncrewed launch) 35 36 37 38 39 40

Soyuz 7K-TM (1974–1976)	Kosmos 638 672 Soyuz 16 19 (Apollo–Soyuz Test Project) 22

Soyuz 7K-S (1974–1976)	Kosmos 670 772† 869†

Soyuz-T (1978–1986)	Kosmos 1001† 1074 Soyuz T-1 (uncrewed) T-2 T-3 T-4 T-5 T-6 T-7 T-8† T-9 T-10a† T-10 T-11 T-12 T-13 T-14 T-15

Soyuz-TM (1986–2002)	Soyuz TM-1 (uncrewed) TM-2 TM-3 TM-4 TM-5 TM-6 TM-7 TM-8 TM-9 TM-10 TM-11 TM-12 TM-13 TM-14 TM-15 TM-16 TM-17 TM-18 TM-19 TM-20 TM-21 TM-22 TM-23 TM-24 TM-25 TM-26 TM-27 TM-28 TM-29 TM-30 TM-31 TM-32 TM-33 TM-34

Soyuz-TMA (2002–2012)	Soyuz TMA-1 TMA-2 TMA-3 TMA-4 TMA-5 TMA-6 TMA-7 TMA-8 TMA-9 TMA-10 TMA-11 TMA-12 TMA-13 TMA-14 TMA-15 TMA-16 TMA-17 TMA-18 TMA-19 TMA-20 TMA-21 TMA-22

Soyuz-TMA-M (2010–2016)	Soyuz TMA-01M TMA-02M TMA-03M TMA-04M TMA-05M TMA-06M TMA-07M TMA-08M TMA-09M TMA-10M TMA-11M TMA-12M TMA-13M TMA-14M TMA-15M TMA-16M TMA-17M TMA-18M TMA-19M TMA-20M

Soyuz MS (2016–present)	Soyuz MS-01

Uncrewed missions are designated with Kosmos numbers; crewed missions get a Soyuz number.
Failed missions are denoted with a † symbol. Cancelled missions are in italics.

← 1974 · Orbital launches in 1975 · 1976 →

Soyuz 17 \| Kosmos 702 \| Kosmos 703 \| Landsat 2 \| Kosmos 704 \| Kosmos 705 \| Kosmos 706 \| Kosmos 707 \| Molniya-2-12 \| Starlette \| SMS-2 \| Kosmos 708 \| Kosmos 709 \| Intelsat IV F-6 \| Taiyo \| Kosmos 710 \| Kosmos 711 · Kosmos 712 · Kosmos 713 · Kosmos 714 · Kosmos 715 · Kosmos 716 · Kosmos 717 · Kosmos 718 \| OPS 2439 \| Kosmos 719 \| Kosmos 720 \| Kosmos 721 · Nauka-5KSA No.4 \| Kosmos 722 \| Interkosmos 13 \| Meteor-M No.31 \| Kosmos 723 \| Soyuz 7K-T No.39 \| Kosmos 724 \| Kosmos 725 \| GEOS-3 \| Kosmos 726 \| RM-20 \| Molniya-3 No.12 \| Kosmos 727 \| Kosmos 728 \| OPS 4883 \| Aryabhata \| Kosmos 729 \| Kosmos 730 \| Molniya-1-29 \| Explorer 53 \| Anik A3 \| Polluz · Castor \| OPS 9435 · OPS 9436 \| Kosmos 731 · Nauka-9KS No.2 \| Intelsat IV F-1 \| OPS 6226 \| Soyuz 18 \| Kosmos 732 · Kosmos 733 · Kosmos 734 · Kosmos 735 · Kosmos 736 · Kosmos 737 · Kosmos 738 · Kosmos 739 \| Kosmos 740 \| Kosmos 741 \| DS-U3-IK No.5 \| Kosmos 742 \| Molniya-1 No.24 · SRET-2 \| Venera 9 \| OPS 6381 · P-226-1 \| Nimbus 6 \| Kosmos 743 \| Venera 10 \| OPS 4966 \| Kosmos 744 \| OSO-8 \| Kosmos 745 \| Kosmos 746 \| Kosmos 747 \| Kosmos 748 \| Kosmos 749 \| Molniya-2-13 \| Meteor-2 No.1 \| Soyuz 19 \| Apollo · DM-2 \| Kosmos 750 \| Kosmos 751 \| Kosmos 752 \| Ji Shu Shiyan Weixing 1 \| Kosmos 753 \| Cos-B \| Kosmos 754 \| Kosmos 755 \| Viking 1 \| Kosmos 756 \| Symphonie 2 \| Kosmos 757 \| Molniya-1-31 \| Kosmos 758 \| Molniya-2-14 \| Kiku 1 \| Viking 2 \| Kosmos 759 \| Kosmos 760 \| Kosmos 761 · Kosmos 762 · Kosmos 763 · Kosmos 764 · Kosmos 765 · Kosmos 766 · Kosmos 767 · Kosmos 768 \| Meteor-M No.28 \| Kosmos 769 \| Kosmos 770 \| Kosmos 771 \| Intelsat IVA F-1 \| Aura \| Kosmos 772 \| Kosmos 773 \| Kosmos 774 \| Explorer 54 \| Kosmos 775 \| OPS 5499 \| Triad 2 \| E-8-5M No.412 \| GOES 1 \| Kosmos 776 \| Kosmos 777 \| Kosmos 778 \| Kosmos 779 \| Molniya-3 No.13 \| Soyuz 20 \| Explorer 55 \| Kosmos 780 \| Kosmos 781 \| Kosmos 782 \| Fanhui Shi Weixing 2 \| Kosmos 783 \| Kosmos 784 \| OPS 4428 · OPS 5547 \| DAD-A · DAD-B \| Interkosmos 14 \| Kosmos 785 \| Satcom 1 \| OPS 3165 \| Ji Shu Shiyan Weixing 2 \| Kosmos 786 \| Molniya-2-15 \| Unnamed \| Prognoz 4 \| Gran' No.11L \| Meteor No.38 \| Molniya-3 No.15

Payloads are separated by bullets ( · ), launches by pipes ( \| ). Manned flights are indicated in bold text. Uncatalogued launch failures are listed in italics. Payloads deployed from other spacecraft are denoted in (brackets).

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