| Mission type | ABM radar target |
|---|---|
| COSPAR ID | 1971-002A |
| SATCATno. | 04847 |
| Spacecraft properties | |
| Spacecraft type | DS-P1-I |
| Manufacturer | Yuzhnoye |
| Launch mass | 300 kilograms (660 lb) |
| Start of mission | |
| Launch date | 14 January 1971, 12:00:00 (1971-01-14UTC12Z) UTC |
| Rocket | Kosmos-2I 63SM |
| Launch site | Plesetsk133/1 |
| End of mission | |
| Decay date | 21 February 1971 (1971-02-22) |
| Orbital parameters | |
| Reference system | Geocentric |
| Regime | Low Earth |
| Perigee altitude | 267 kilometres (166 mi) |
| Apogee altitude | 803 kilometres (499 mi) |
| Inclination | 70.9 degrees |
| Period | 95.3 minutes |
Kosmos 391 (Russian:Космос 391 meaningCosmos 391), also known asDS-P1-I No.11 was asatellite which was used as aradar target foranti-ballistic missile tests. It was launched by theSoviet Union in 1971 as part of theDnepropetrovsk Sputnik programme.[1]
It was launched aboard aKosmos-2I 63SM rocket,[2] fromSite 133/1 atPlesetsk. The launch occurred at 12:00:00 UTC on 14 January 1971.[3]
Kosmos 391 was placed into alow Earth orbit with aperigee of 267 kilometres (166 mi), anapogee of 803 kilometres (499 mi), 70.9 degrees ofinclination, and anorbital period of 95.3 minutes.[1] Itdecayed from orbit on 21 February 1971.[4]
Kosmos 391 was the tenth of nineteenDS-P1-I satellites to be launched.[1] Of these, all reached orbit successfully except theseventh.[5]
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