Kosmos 283

Mission type	ABM radar target
COSPAR ID	1969-047A
SATCAT no.	03957
Spacecraft properties
Spacecraft type	DS-P1-Yu
Manufacturer	Yuzhnoye
Launch mass	250 kilograms (550 lb)
Start of mission
Launch date	27 May 1969, 12:59:59 (1969-05-27UTC12:59:59Z) UTC
Rocket	Kosmos-2I 63SM
Launch site	Plesetsk 133/1
End of mission
Decay date	10 December 1969 (1969-12-11)
Orbital parameters
Reference system	Geocentric
Regime	Low Earth
Perigee altitude	196 kilometres (122 mi)
Apogee altitude	1,364 kilometres (848 mi)
Inclination	81.9 degrees
Period	100.5 minutes

Kosmos 283 (Russian: Космос 283 meaning Cosmos 283), known before launch as DS-P1-Yu No.19, was a Soviet satellite which was used as a radar calibration target for tests of anti-ballistic missiles. It was a 250-kilogram (550 lb) spacecraft, which was built by the Yuzhnoye Design Bureau, and launched in 1969 as part of the Dnepropetrovsk Sputnik programme.^[1]

Kosmos 283 was launched from Site 133/1 at the Plesetsk Cosmodrome,^[2] atop a Kosmos-2I 63SM carrier rocket. The launch occurred on 27 May 1969 at 12:59:59 UTC, and resulted in Kosmos 283's successful deployment into low Earth orbit.^[3] Upon reaching orbit, it was assigned its Kosmos designation, and received the International Designator 1969-047A.

Kosmos 283 was operated in an orbit with a perigee of 196 kilometres (122 mi), an apogee of 1,364 kilometres (848 mi), 81.9 degrees of inclination, and an orbital period of 100.5 minutes.^[1][4] It remained in orbit until it decayed and reentered the atmosphere on 10 December 1969.^[4] It was the twenty-first of seventy nine DS-P1-Yu satellites to be launched,^[1] and the twentieth of seventy two to successfully reach orbit.^[5]

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