Kosmos 869
Kosmos 869 was an unmanned military Soyuz 7K-S test. It was a somewhat successful mission. This was the third and final test flight of a new Soyuz spacecraft type 7K-S. It was designed to be a spaceship for military solo missions. At the time of the launch the program had already been discontinued. The completed spaceships were launched as unmanned test flights: Kosmos 670, Kosmos 772 and Kosmos 869. The experience from these flights were used in the development of the successor program Soyuz spacecraft the Soyuz 7K-ST.Mission parameters
- Spacecraft: Soyuz 7K-S.
- Mass: 6800 kg.
- Crew: None.
- Launched: November 29, 1976.
- Landed: December 17, 1976 10:31 UTC.
- Perigee: 209 km.
- Apogee: 289 km.
- Inclination: 51.7 deg.
- Duration: 17.99 days.
- 196 km X 290 km orbit to 187 km X 335 km orbit. Delta V: 15 m/s.
- 187 km X 335 km orbit to 259 km X 335 km orbit. Delta V: 21 m/s.
- 259 km X 335 km orbit to 260 km X 345 km orbit. Delta V: 2 m/s.
- 260 km X 345 km orbit to 265 km X 368 km orbit. Delta V: 7 m/s.
- 265 km X 368 km orbit to 267 km X 391 km orbit. Delta V: 6 m/s.
- 267 km X 391 km orbit to 300 km X 310 km orbit. Delta V: 32 m/s.
Total Delta V: 83 m/s.
