Soyuz_20 References

Soyuz 20
Mission type	Test flight
Operator	Soviet space program
COSPAR ID	1975-106A
SATCAT no.	08430
Mission duration	90 days 11 hours 47 minutes
Orbits completed	1470
Spacecraft properties
Spacecraft	Soyuz 7K-T No.8
Spacecraft type	Soyuz 7K-T/A9
Manufacturer	NPO Energia
Launch mass	6570 kg
Landing mass	2800 kg
Dimensions	7.13 m long; 2.72 m wide
Start of mission
Launch date	17 November 1975,; 14:36:37 UTC
Rocket	Soyuz-U
Launch site	Baikonur, Site 1/5
End of mission
Landing date	16 February 1976, 02:24 UTC
Landing site	56 km at the southwest of Arkalyk, Kazakhstan
Orbital parameters
Reference system	Geocentric orbit
Regime	Low Earth orbit
Perigee altitude	199.7 km
Apogee altitude	263.5 km
Inclination	51.6°
Period	88.8 minutes
Docking with Salyut 4
	Soyuz programme ← Soyuz 19 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.

Mission parameters

Mass: 6,570 kg (14,480 lb) ^[1]
Perigee: 199.7 km (124.1 mi)^[3]
Apogee: 263.5 km (163.7 mi)
Inclination: 51.6°
Period: 88.8 minutes

Return

It was recovered on 16 February 1976 at 02:24 UTC.^[1]

References

^ ^a ^b ^c "Display: Soyuz 20 1975-106A". NASA. 14 May 2020. Retrieved 13 October 2020. This article incorporates text from this source, which is in the public domain.
^ "Baikonur LC1". Encyclopedia Astronautica. Archived from the original on 15 April 2009. Retrieved 4 March 2009.
^ ^a ^b "Trajectory: Soyuz 20 1975-106A". NASA. 14 May 2020. Retrieved 13 October 2020. This article incorporates text from this source, which is in the public domain.

[Display-1] "Display: Soyuz 20 1975-106A". NASA. 14 May 2020. Retrieved 13 October 2020. This article incorporates text from this source, which is in the public domain.

[2] "Baikonur LC1". Encyclopedia Astronautica. Archived from the original on 15 April 2009. Retrieved 4 March 2009.

[Trajectory-3] "Trajectory: Soyuz 20 1975-106A". NASA. 14 May 2020. Retrieved 13 October 2020. This article incorporates text from this source, which is in the public domain.

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