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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Kosmos 257 ： ウィキペディア英語版 Kosmos 257 Kosmos 257 ((ロシア語:Космос 257) meaning ''Cosmos 257''), known before launch as DS-P1-Yu No.17, was a Soviet satellite which was used as a radar calibration target for tests of anti-ballistic missiles. It was built by the Yuzhnoye Design Bureau, and launched in 1968 as part of the Dnepropetrovsk Sputnik programme. It had a mass of .〔 Kosmos 257 was launched from Site 133/1 at Plesetsk, atop a Kosmos-2I 63SM carrier rocket. The launch occurred on 3 December 1968 at 14:52:21 UTC, and resulted in Kosmos 257's successful deployment into low Earth orbit. Upon reaching orbit, it was assigned its Kosmos designation, and received the International Designator 1968-107A. Kosmos 257 was operated in an orbit with a perigee of , an apogee of , 70.9 degrees of inclination, and an orbital period of 91.10 minutes.〔〔 It remained in orbit until it decayed and reentered the atmosphere on 5 March 1969. It was the seventeenth of seventy nine DS-P1-Yu satellites to be launched,〔 and the sixteenth of seventy two to successfully reach orbit. ==See also== *1968 in spaceflight 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 257」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.