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Soyuz 20

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Title: Soyuz 20  
Author: World Heritage Encyclopedia
Language: English
Subject: List of unmanned spaceflights to Salyut space stations, 1975 in spaceflight, Soyuz 15, Soyuz 7K-T, Soyuz programme
Collection: 1975 in Spaceflight, Soyuz Program, Spacecraft Launched in 1975
Publisher: World Heritage Encyclopedia

Soyuz 20

Soyuz 20
Mission duration 90 days, 11 hours, 46 minutes
Orbits completed 1470
Spacecraft properties
Spacecraft type Soyuz 7K-T/A9
Manufacturer NPO Energia
Launch mass 6,570 kilograms (14,480 lb)
Start of mission
Launch date November 17, 1975, 14:38:00 (1975-11-17T14:38Z) UTC
Rocket Soyuz
Launch site Baikonur 1/5[1]
End of mission
Landing date Did not recognize date. Try slightly modifying the date in the first parameter. UTC
Landing site 56 kilometres (35 mi) SW of Arkalyk
Orbital parameters
Reference system Geocentric
Regime Low Earth
Perigee 177 kilometres (110 mi)
Apogee 251 kilometres (156 mi)
Inclination 51.6 degrees
Period 89.1 minutes
Docking with Salyut 4

Soyuz programme
(Manned missions)
← Soyuz 19 Soyuz 21

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.



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


  1. ^ "Baikonur LC1". Encyclopedia Astronautica. Retrieved 2009-03-04. 
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