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Soyuz 20 information


Soyuz 20
Mission typeTest flight
OperatorSoviet space program
COSPAR ID1975-106A Edit this at Wikidata
SATCAT no.08430
Mission duration90 days 11 hours 47 minutes
Orbits completed1470
Spacecraft properties
SpacecraftSoyuz 7K-T No.8
Spacecraft typeSoyuz 7K-T/A9
ManufacturerNPO Energia
Launch mass6570 kg [1]
Landing mass2800 kg
Dimensions7.13 m long
2.72 m wide
Start of mission
Launch date17 November 1975,
14:36:37 UTC
RocketSoyuz-U
Launch siteBaikonur, Site 1/5[2]
End of mission
Landing date16 February 1976, 02:24 UTC
Landing site56 km at the southwest of Arkalyk, Kazakhstan
Orbital parameters
Reference systemGeocentric orbit[3]
RegimeLow Earth orbit
Perigee altitude199.7 km
Apogee altitude263.5 km
Inclination51.6°
Period88.8 minutes
Docking with Salyut 4
Soyuz programme
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Soyuz 21 →
 

Soyuz 20 (Russian: Союз 20, Union 20) was an uncrewed 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.

  1. ^ Cite error: The named reference Display was invoked but never defined (see the help page).
  2. ^ "Baikonur LC1". Encyclopedia Astronautica. Archived from the original on 15 April 2009. Retrieved 4 March 2009.
  3. ^ Cite error: The named reference Trajectory was invoked but never defined (see the help page).

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