|Mission type||ABM radar target|
|Launch mass||325 kilograms (717 lb)|
|Start of mission|
|Launch date||27 August 1971, 10:54:56UTC|
|Launch site||Plesetsk 133/1|
|End of mission|
|Decay date||28 January 1972|
|Perigee altitude||265 kilometres (165 mi)|
|Apogee altitude||455 kilometres (283 mi)|
Kosmos 435 (Russian: Космос 435 meaning Cosmos 435), known before launch as DS-P1-Yu No.41, 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 435 was successfully launched into low Earth orbit on 27 August 1971, with the rocket lifting off at 10:54:56 UTC. The launch took place from Site 133/1 at the Plesetsk Cosmodrome, and used a Kosmos-2I 63SM carrier rocket.
Kosmos 435 was the forty-fifth of seventy nine DS-P1-Yu satellites to be launched, and the fortieth of seventy two to successfully reach orbit. It was operated in an orbit with a perigee of 265 kilometres (165 mi), an apogee of 455 kilometres (283 mi), 70.9 degrees of inclination, and an orbital period of 91.8 minutes. It remained in orbit until it decayed and reentered the atmosphere on 28 January 1972.