Kosmos 2421

Kosmos 2421 (Cosmos 2421) was a Russian reconnaissance satellite launched in 2006, but began fragmenting in early 2008. It also had the Konus-A science payload designed by Ioffe Institute to detect gamma-ray bursts. Three separate fragmentation events produced about 500 pieces of trackable debris. About half of those had already re-entered Earth's atmosphere by the fall of 2008.

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