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Kosmos 2261 ((ロシア語:Космос 2261) meaning ''Cosmos 2261'') is a Russian US-K missile early warning satellite which was launched in 1993 as part of the Russian Space Forces' Oko programme. The satellite is designed to identify missile launches using optical telescopes and infrared sensors.〔 It was estimated in the west that it stopped functioning in March 1998,〔(N. Busch - No End in Sight (2004) - Page 97 ) (Google Books link)]〕 and reentered destructively on December 31, 2012.〔 (the early morning of January 1, 2013 in some time zones) Kosmos 2261 was launched from Site 16/2 at Plesetsk Cosmodrome in Russia.〔 A Molniya-M carrier rocket with a 2BL upper stage was used to perform the launch, which took place at 14:53 UTC on 10 August 1993.〔 The launch successfully placed the satellite into a molniya orbit. It subsequently received its Kosmos designation, and the international designator 1993-051A.〔 The United States Space Command assigned it the Satellite Catalog Number 22741.〔 Its predicted re-entry time was December 31, 2012 at 11:29 UTC ± 2 hours.〔(Aerospace.org - Cosmos 2261 )〕 ==References== 〔 〔 〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Kosmos 2261」の詳細全文を読む スポンサード リンク
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