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Kosmos 725
Mission type	ABM radar target
COSPAR ID	1975-026A
SATCAT no.	07730
Spacecraft properties
Spacecraft type	DS-P1-Yu
Manufacturer	Yuzhnoye
Launch mass	400 kilograms (880 lb)
Start of mission
Launch date	8 April 1975, 18:29:56 UTC
Rocket	Kosmos-2I 63SM
Launch site	Plesetsk 133/1
End of mission
Decay date	6 January 1976
Orbital parameters
Reference system	Geocentric
Regime	Low Earth
Perigee altitude	267 kilometres (166 mi)
Apogee altitude	466 kilometres (290 mi)
Inclination	70.9 degrees
Period	91.9 minutes

Kosmos 725 (Russian: Космос 725 meaning Cosmos 725), also known as DS-P1-Yu No.77, was a Soviet satellite which was launched in 1975 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]

A Kosmos-2I 63SM carrier rocket was used to launch Kosmos 725 from Site 133/1 of the Plesetsk Cosmodrome.^[2] The launch occurred at 18:29:56 UTC on 8 April 1975, and resulted in the successfully insertion of the satellite into low Earth orbit.^[3] Upon reaching orbit, the satellite was assigned its Kosmos designation, and received the International Designator 1975-026A.^[4] The North American Aerospace Defense Command assigned it the catalogue number 07730.

Kosmos 725 was the seventy-sixth of seventy nine DS-P1-Yu satellites to be launched,^[1] and the sixty-ninth of seventy two to successfully reach orbit.^[5] It was operated in an orbit with a perigee of 267 kilometres (166 mi), an apogee of 466 kilometres (290 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 6 January 1976.^[6]

References

^ ^a ^b Wade, Mark. "DS-P1-Yu". Encyclopedia Astronautica. Archived from the original on 2 June 2012. Retrieved 2 September 2009.
^ McDowell, Jonathan. "Launch Log". Jonathan's Space Page. Retrieved 2 September 2009.
^ Wade, Mark. "Kosmos 2". Encyclopedia Astronautica. Archived from the original on 18 June 2012. Retrieved 2 September 2009.
^ "Cosmos 725". NSSDC Master Catalog. US National Space Science Data Center. Retrieved 2 September 2009.
^ Krebs, Gunter. "DS-P1-Yu (11F618)". Gunter's Space Page. Retrieved 2 September 2009.
^ ^a ^b McDowell, Jonathan. "Satellite Catalog". Jonathan's Space Page. Retrieved 2 September 2009.