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Soyuz 20



Soyuz 20 was an unmanned spacecraft launched by the USSR. It was a long duration test of the Soyuz transport vehicle that docked with the Salyut 4 space station. It was recovered on February 16, 1976 2:24 GMT. 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.

Alternate Names

  • 08430
  • Soyuz20

Facts in Brief

Launch Date: 1975-11-17
Launch Vehicle: Modified SS-6 (Sapwood) with 2nd Generation (Longer) Upper Stage
Launch Site: Tyuratam (Baikonur Cosmodrome), U.S.S.R
Mass: 6570 kg

Funding Agency

  • Unknown (U.S.S.R)


  • Engineering

Additional Information

Questions and comments about this spacecraft can be directed to: Coordinated Request and User Support Office

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