Kosmos 772
Unmanned test flight of the Soyuz 7K-S spacecraft
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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.[1][2] The experience from these flights were used in the development of the successor program Soyuz spacecraft the Soyuz 7K-ST.[3][4][5][6][7][8]
| Mission type | Orbital test flight |
|---|---|
| Operator | Soviet space program |
| COSPAR ID | 1975-093A |
| SATCAT no. | 8338 |
| Mission duration | 3 days, 23 hours and 55 minutes |
| Spacecraft properties | |
| Spacecraft type | Soyuz 7K-S s/n 2L |
| Manufacturer | NPO Energia |
| Launch mass | 6,750 kg (14,880 lb) |
| Start of mission | |
| Launch date | 29 September 1975, 04:15 GMT |
| Rocket | Soyuz-U |
| Launch site | Baikonur 1/5 |
| End of mission | |
| Disposal | Deorbited |
| Landing date | 3 October 1975, 04:10 GMT |
| Orbital parameters | |
| Reference system | Geocentric |
| Perigee altitude | 154 km (96 mi) |
| Apogee altitude | 245 km (152 mi) |
| Inclination | 51.8° |
| Period | 88.4 min |
Mission parameters
Maneuver 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.
