Kosmos 303
Mission typeABM radar target
COSPAR ID1969-090A Edit this at Wikidata
SATCAT no.04136Edit this on Wikidata
Spacecraft properties
Spacecraft typeDS-P1-Yu
Launch mass325 kilograms (717 lb)
Start of mission
Launch date18 October 1969, 10:00:03 (1969-10-18UTC10:00:03Z) UTC
RocketKosmos-2I 63SM
Launch sitePlesetsk 133/1
End of mission
Decay date23 January 1970 (1970-01-24)
Orbital parameters
Reference systemGeocentric
RegimeLow Earth
Perigee altitude259 kilometres (161 mi)
Apogee altitude426 kilometres (265 mi)
Inclination71 degrees
Period91.4 minutes

Kosmos 303 (Russian: Космос 303 meaning Cosmos 303), known before launch as DS-P1-Yu No.28, was a Soviet satellite which was launched in 1969 as part of the Dnepropetrovsk Sputnik programme. It was a 325-kilogram (717 lb) spacecraft, which was built by the Yuzhnoye Design Bureau, and was used as a radar calibration target for anti-ballistic missile tests.[1]


Kosmos 303 was launched from Site 133/1 at the Plesetsk Cosmodrome,[2] atop a Kosmos-2I 63SM carrier rocket. The launch occurred on 18 October 1969 at 10:00:03 UTC, and resulted in the successful deployment of Kosmos 303 into low Earth orbit.[3] Upon reaching orbit, it was assigned its Kosmos designation, and received the International Designator 1969-090A.

Kosmos 303 was operated in an orbit with a perigee of 259 kilometres (161 mi), an apogee of 426 kilometres (265 mi), 71 degrees of inclination, and an orbital period of 91.4 minutes.[1][4] It remained in orbit until it decayed and reentered the atmosphere on 23 January 1970.[4] It was the twenty-fifth of seventy nine DS-P1-Yu satellites to be launched,[1] and the twenty-third of seventy two to successfully reach orbit.[5]

See also


  1. ^ a b c Wade, Mark. "DS-P1-Yu". Encyclopedia Astronautica. Archived from the original on 18 May 2012. Retrieved 14 August 2009.
  2. ^ McDowell, Jonathan. "Launch Log". Jonathan's Space Page. Retrieved 14 August 2009.
  3. ^ Wade, Mark. "Kosmos 2". Encyclopedia Astronautica. Archived from the original on 8 July 2012. Retrieved 14 August 2009.
  4. ^ a b McDowell, Jonathan. "Satellite Catalog". Jonathan's Space Page. Retrieved 14 August 2009.
  5. ^ Krebs, Gunter. "DS-P1-Yu (11F618)". Gunter's Space Page. Retrieved 14 August 2009.