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Kosmos 633
Kosmos 633 (Russian: Космос 633 meaning Cosmos 633), also known as DS-P1-Yu No.71, was a Soviet satellite which was launched in 1974 as part of the Dnepropetrovsk Sputnik programme. It was a 400-kilogram (880 lb) spacecraft, which was built by the Yuzhnoye Design Bureau, and was used as a radar calibration target for anti-ballistic missile tests.[1] The launch of Kosmos 633 occurred at 11:05 UTC on 27 February 1974, and resulted in the satellite successfully reaching low Earth orbit.[2] The launch took place from Site 133/1 at the Plesetsk Cosmodrome,[3] and used a Kosmos-2I 63SM carrier rocket. Upon reaching orbit, the satellite was assigned its Kosmos designation, and received the International Designator 1974-010A.[4] The North American Aerospace Defense Command assigned it the catalogue number 07187. Kosmos 633 was the sixty-eighth of seventy nine DS-P1-Yu satellites to be launched,[1] and the sixty-second of seventy two to successfully reach orbit.[5] It was operated in an orbit with a perigee of 265 kilometres (165 mi), an apogee of 472 kilometres (293 mi), 70.9 degrees of inclination, and an orbital period of 91.9 minutes.[6] It remained in orbit until it decayed and reentered the atmosphere on 4 October 1974.[6] See alsoReferences
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