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Kosmos 772

Unmanned test flight of the Soyuz 7K-S spacecraft

Kosmos 772 (Russian: Космос 772 meaning Cosmos 772) was an uncrewed military Soyuz 7K-S test. It was an unsuccessful mission as only one transmitter worked. Only the 166 MHz frequency transmitter operated, all of the other normal Soyuz wavelengths transmitters failed. The experience from these flights were used in the development of the successor program Soyuz spacecraft the Soyuz 7K-ST.

01Mission parameters

  • Spacecraft: Soyuz 7K-S
  • Mass: 6750 kg
  • Crew: None
  • Launched: September 29, 1975
  • Landed: October 3, 1975 4:10 UTC
  • Perigee: 154 km
  • Apogee: 245 km
  • Inclination: 51.8 deg
  • Duration: 3.99 days

02Maneuver Summary

  • 193 km X 270 km orbit to 195 km X 300 km orbit. Delta V: 8 m/s.
  • 196 km X 300 km orbit to 196 km X 328 km orbit. Delta V: 8 m/s.

Total Delta V: 16 m/s.

Watch videos about Kosmos 772Explainers and documentaries on YouTube (opens in a new tab)

Sources and credits

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