Kosmos 275
| Mission type | ABM radar target |
|---|---|
| COSPAR ID | 1969-031A |
| SATCAT no. | 03846 |
| Spacecraft properties | |
| Spacecraft type | DS-P1-I |
| Manufacturer | Yuzhnoye |
| Launch mass | 300 kilograms (660 lb) |
| Start of mission | |
| Launch date | 16:00, March 28, 1969 (UTC) UTC |
| Rocket | Kosmos-2I 63SM |
| Launch site | Plesetsk 133/1 |
| End of mission | |
| Decay date | 7 February 1970 |
| Orbital parameters | |
| Reference system | Geocentric |
| Regime | Low Earth |
| Perigee altitude | 273 kilometres (170 mi) |
| Apogee altitude | 780 kilometres (480 mi) |
| Inclination | 71 degrees |
| Period | 95.2 minutes |
Kosmos 275 (Russian: Космос 275 meaning Cosmos 275), also known as DS-P1-I No.5 was a satellite which was used as a radar target for anti-ballistic missile tests. It was launched by the Soviet Union in 1969 as part of the Dnepropetrovsk Sputnik programme.
It was launched aboard a Kosmos-2I 63SM rocket, from Site 133/1 at Plesetsk. The launch occurred at 16:00:08 UTC on 28 March 1969.
Kosmos 275 was placed into a low Earth orbit with a perigee of 273 kilometres (170 mi), an apogee of 780 kilometres (480 mi), 71 degrees of inclination, and an orbital period of 95.2 minutes. It decayed from orbit on 7 February 1970.
Kosmos 275 was the fifth of nineteen DS-P1-I satellites to be launched. Of these, all reached orbit successfully except the seventh.