Kosmos 869 ( meaning ''Cosmos 869'') was an
uncrewed
An uncrewed vehicle or unmanned vehicle is a vehicle without a person on board. Uncrewed vehicles can either be under telerobotic control—remote controlled or remote guided vehicles—or they can be autonomously controlled—autonomous vehicl ...
military
Soyuz
Soyuz is a transliteration of the Cyrillic text Союз (Russian language, Russian and Ukrainian language, Ukrainian, 'Union'). It can refer to any union, such as a trade union (''profsoyuz'') or the Soviet Union, Union of Soviet Socialist Republi ...
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 uncrewed test flights:
Kosmos 670
Kosmos 670 ( meaning ''Cosmos 670'') was an unmanned space mission, unmanned Soyuz (spacecraft), Soyuz Military_Soyuz#Soyuz_7K-S, 7K-S test. It used a new and unique inclination of 50.6 degree. The experience from these flights were used in the de ...
,
Kosmos 772
Kosmos 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 f ...
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
An apsis (; ) is the farthest or nearest point in the orbit of a planetary body about its primary body. The line of apsides (also called apse line, or major axis of the orbit) is the line connecting the two extreme values.
Apsides perta ...
: 209 km.
*
Apogee
An apsis (; ) is the farthest or nearest point in the orbit of a planetary body about its primary body. The line of apsides (also called apse line, or major axis of the orbit) is the line connecting the two extreme values.
Apsides perta ...
: 289 km.
*Inclination: 51.7 deg.
*Duration: 17.99 days.
Maneuver Summary
*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.
See also
*
Cosmos 670
*
Cosmos 772
References
Kosmos 0869
Kosmos 0869
Kosmos 0869
1976 in the Soviet Union
Spacecraft launched in 1976
1976 in spaceflight
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