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Kosmos 265
Mission type	ABM radar target
COSPAR ID	1969-012A
SATCAT no.	03675
Spacecraft properties
Spacecraft type	DS-P1-Yu
Manufacturer	Yuzhnoye
Launch mass	325 kg (717 lb)
Start of mission
Launch date	7 February 1969, 13:59 UTC
Rocket	Kosmos-2I 63SM
Launch site	Plesetsk 133/1
End of mission
Decay date	1 May 1969
Orbital parameters
Reference system	Geocentric
Regime	Low Earth
Perigee altitude	261 km (162 mi)
Apogee altitude	413 km (257 mi)
Inclination	70.9 degrees
Period	91.3 minutes

Kosmos 265 (Russian: Космос 265 meaning Cosmos 265), known before launch as DS-P1-Yu No.21, was a Soviet satellite which was used as a radar calibration target for tests of anti-ballistic missiles. It was built by the Yuzhnoye Design Bureau, and launched in 1969 as part of the Dnepropetrovsk Sputnik programme.^[1] It had a mass of 325 kg (717 lb).^[1]

Kosmos 265 was launched from Plesetsk Cosmodrome Site 133/1,^[2] atop a Kosmos-2I 63SM carrier rocket. The launch occurred on 7 February 1969 at 13:59 UTC, and resulted in Kosmos 265's successful deployment into low Earth orbit.^[3] Upon reaching orbit, it was assigned its Kosmos designation, and received the International Designator 1969-012A.

Kosmos 265 was operated in an orbit with a perigee of 261 kilometres (162 mi), an apogee of 413 kilometres (257 mi), 70.9 degrees of inclination, and an orbital period of 91.3 minutes.^[1]^[4] It remained in orbit until it decayed and reentered the atmosphere on 1 May 1969.^[4] It was the eighteenth of seventy nine DS-P1-Yu satellites to be launched,^[1] and the seventeenth of seventy two to successfully reach orbit.^[5]

References

^ ^a ^b ^c ^d Wade, Mark. "DS-P1-Yu". Encyclopedia Astronautica. Archived from the original on 2 June 2012. Retrieved 13 August 2009.
^ McDowell, Jonathan. "Launch Log". Jonathan's Space Page. Retrieved 13 August 2009.
^ Wade, Mark. "Kosmos 2". Encyclopedia Astronautica. Archived from the original on 18 June 2012. Retrieved 13 August 2009.
^ ^a ^b McDowell, Jonathan. "Satellite Catalog". Jonathan's Space Page. Retrieved 13 August 2009.
^ Krebs, Gunter. "DS-P1-Yu (11F618)". Gunter's Space Page. Retrieved 13 August 2009.