Kosmos 391 ( meaning Cosmos 391), also known as DS-P1-I No.11 was a satellite which was used as a radar target for anti-ballistic missile tests. It was launched by the Soviet Union in 1971 as part of the Dnepropetrovsk Sputnik programme.
Launch It was launched aboard a Kosmos-2I 63SM rocket, from Site 133/1 at Plesetsk. The launch occurred at 12:00:00 UTC on 14 January 1971.
Orbit Kosmos 391 was placed into a low Earth orbit with a perigee of , an apogee of , 70.9 degrees of inclination, and an orbital period of 95.3 minutes. It decayed from orbit on 21 February 1971.
Kosmos 391 was the tenth of nineteen DS-P1-I satellites to be launched. Of these, all reached orbit successfully except the seventh.
See also
1971 in spaceflight
References