Kosmos 2251 russian satellite.
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At 16:56 GMT on 10 February 2009 it collided with Iridium 33, an Iridium satellite in the first major collision of two satellites in Earth orbit. The Iridium satellite, which was operational at the time of the collision, was destroyed, as was Kosmos-2251. The Kosmos satellite was launched in 1993. Russia has not commented on claims the satellite was out of control. NASA reported that a large amount of debris was produced by the collision.
Kosmos Russian: ?????? meaning Cosmos is a series of satellites which were launched by the Soviet Union and are being launched now by Russia. The first of them was launched on March 16, 1962.
Any satellite which doesnt fit into any particular program is designated as a Kosmos satellite. As of November 14, 2008 2,445 Kosmos satellites had been launched. The satellites have very different roles, early ones were used for scientific exploration, some of them are failed interplanetary probes. It is suspected that most are military reconnaissance satellites and satellites for other military uses.