Kosmos 634
Kosmos 634 ( meaning "Cosmos 634"), also known as DS-P1-Yu No.67, was a Soviet satellite which was launched in 1974 as part of the Dnepropetrovsk Sputnik programme. It was a spacecraft, which was built by the Yuzhnoye Design Bureau, and was used as a radar calibration target for anti-ballistic missile tests. The launch of Kosmos 634 took place from Site 133/1 at the Plesetsk Cosmodrome, and used a Kosmos-2I 63SM carrier rocket. It occurred at 16:05 UTC on 5 March 1974, and resulted in the satellite successfully reaching low Earth orbit. Upon reaching orbit, the satellite  was assigned its Kosmos designation, and received the International Designator 1974-012A. The North American Aerospace Defense Command assigned it the catalogue number 07211. Kosmos 634 was the sixty-ninth of seventy nine DS-P1-Yu satellites to be launched, and the sixty-third of seventy two to successfully reach orbit. It was operated in an orbit with a perigee of , an apogee of , 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 October 1974.