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Cosmos 2251

NSSDCA/COSPAR ID: 1993-036A

Description

The lowest level of the three-tier communications satellite constellation is now populated with two distinct systems devoted to military and government communications. Both systems are assessed to be simple store-dump repeaters which were particularly useful in relaying non-essential traffic between the Russian Federation and overseas stations of forces. The first Strela (which means "Arrow" in Russian) system debuted in 1970 and consisted of 750-1000 kg satellites deployed at mean altitudes of 800 km in three orbital planes inclined 74 degrees to the equator and spaced 120 degrees apart. These Strela 2 spacecraft were launched separately by the Kosmos launch vehicle from the Plesetsk cosmodrome into each orbital plane at intervals of 24-36 months. The activity of these satellites could be monitored via a characteristic CW beacon emitted on a frequency of 153.660 MHz.

On 10 February 2009 at approximately 16:56 UT the Cosmos 2251 satellite collided with Iridium 33 (1997-051C). The collision took place at about 800 km altitude.

Alternate Names

  • 22675

Facts in Brief

Launch Date: 1993-06-16
Launch Vehicle: Cosmos
Launch Site: Plesetsk, Russia
Mass: 900.0 kg

Funding Agency

  • Unknown (U.S.S.R)

Discipline

  • Communications

Additional Information

Questions or comments about this spacecraft can be directed to: Coordinated Request and User Support Office.

 
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