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Kosmos 634
Mission type	ABM radar target
COSPAR ID	1974-012A
SATCAT no.	07211
Spacecraft properties
Spacecraft type	DS-P1-Yu
Manufacturer	Yuzhnoye
Launch mass	400 kilograms (880 lb)
Start of mission
Launch date	5 March 1974, 16:05 UTC
Rocket	Kosmos-2I 63SM
Launch site	Plesetsk 133/1
End of mission
Decay date	9 October 1974
Orbital parameters
Reference system	Geocentric
Regime	Low Earth
Perigee altitude	266 kilometres (165 mi)
Apogee altitude	464 kilometres (288 mi)
Inclination	70.9 degrees
Period	91.9 minutes

Kosmos 634 (Russian: Космос 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 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 634 took place from Site 133/1 at the Plesetsk Cosmodrome,^[2] 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.^[3] Upon reaching orbit, the satellite was assigned its Kosmos designation, and received the International Designator 1974-012A.^[4] 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,^[1] and the sixty-third of seventy two to successfully reach orbit.^[5] It was operated in an orbit with a perigee of 266 kilometres (165 mi), an apogee of 464 kilometres (288 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 9 October 1974.^[6]

References

^ ^a ^b Wade, Mark. "DS-P1-Yu". Encyclopedia Astronautica. Archived from the original on 2 June 2012. Retrieved 1 September 2009.
^ McDowell, Jonathan. "Launch Log". Jonathan's Space Page. Retrieved 1 September 2009.
^ Wade, Mark. "Kosmos 2". Encyclopedia Astronautica. Archived from the original on 18 June 2012. Retrieved 1 September 2009.
^ "Cosmos 634". NSSDC Master Catalog. US National Space Science Data Center. Retrieved 1 September 2009.
^ Krebs, Gunter. "DS-P1-Yu (11F618)". Gunter's Space Page. Retrieved 1 September 2009.
^ ^a ^b McDowell, Jonathan. "Satellite Catalog". Jonathan's Space Page. Retrieved 1 September 2009.