| Mission type | ABM radar target |
|---|---|
| COSPAR ID | 1969-049A |
| SATCAT no. | 03983 |
| Spacecraft properties | |
| Spacecraft type | DS-P1-Yu |
| Manufacturer | Yuzhnoye |
| Launch mass | 250 kilograms (550 lb) |
| Start of mission | |
| Launch date | 3 June 1969, 12:57:27 UTC |
| Rocket | Kosmos-2I 63SM |
| Launch site | Plesetsk 133/1 |
| End of mission | |
| Decay date | 7 October 1969 |
| Orbital parameters | |
| Reference system | Geocentric |
| Regime | Low Earth |
| Perigee altitude | 257 kilometres (160 mi) |
| Apogee altitude | 452 kilometres (281 mi) |
| Inclination | 71 degrees |
| Period | 91.6 minutes |
Kosmos 285 (Russian: Космос 285 meaning Cosmos 285), known before launch as DS-P1-Yu No.24,[1] was a Soviet satellite which was used as a radar calibration target for tests of anti-ballistic missiles. It was a 250-kilogram (550 lb) spacecraft, which was built by the Yuzhnoye Design Bureau, and launched in 1969 as part of the Dnepropetrovsk Sputnik programme.[2]
Kosmos 285 was launched from Site 133/1 at the Plesetsk Cosmodrome,[1] atop a Kosmos-2I 63SM carrier rocket. The launch occurred on 3 June 1969 at 12:57:27 UTC, and resulted in Kosmos 285's successful deployment into low Earth orbit.[3] Upon reaching orbit, it was assigned its Kosmos designation, and received the International Designator 1969-049A.
Kosmos 285 was operated in an orbit with a perigee of 257 kilometres (160 mi), an apogee of 452 kilometres (281 mi), 71 degrees of inclination, and an orbital period of 91.6 minutes.[2][4] It remained in orbit until it decayed and reentered the atmosphere on 7 October 1969.[4] It was the twenty-second of seventy nine DS-P1-Yu satellites to be launched,[2] and the twenty-first of seventy two to successfully reach orbit.[5]
