|Mission type||ABM radar target|
|Launch mass||325 kilograms (717 lb)|
|Start of mission|
|Launch date||17 November 1971, 11:09:48UTC|
|Launch site||Plesetsk 133/1|
|End of mission|
|Decay date||9 April 1972|
|Perigee altitude||266 kilometres (165 mi)|
|Apogee altitude||468 kilometres (291 mi)|
Kosmos 455 (Russian: Космос 455 meaning Cosmos 455), known before launch as DS-P1-Yu No.54, was a Soviet satellite which was launched in 1971 as part of the Dnepropetrovsk Sputnik programme. It was a 325-kilogram (717 lb) spacecraft, which was built by the Yuzhnoye Design Bureau, and was used as a radar calibration target for anti-ballistic missile tests.
Kosmos 455 was successfully launched into low Earth orbit on 17 November 1971, with the rocket lifting off at 11:09:48 UTC. The launch took place from Site 133/1 at the Plesetsk Cosmodrome, and used a Kosmos-2I 63SM carrier rocket.
Kosmos 455 was the forty-seventh of seventy nine DS-P1-Yu satellites to be launched, and the forty-second of seventy two to successfully reach orbit. It was operated in an orbit with a perigee of 266 kilometres (165 mi), an apogee of 468 kilometres (291 mi), 70.9 degrees of inclination, and an orbital period of 91.9 minutes. It remained in orbit until it decayed and reentered the atmosphere on 9 April 1972.