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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 789 Lena ： ウィキペディア英語版 789 Lena 789 Lena is a medium-sized X-type asteroid orbiting in the Main belt near the Eunomia family. However, true family members have an S-type composition, so it is almost certainly an unrelated interloper. Observations made in 1995 appeared to show that Lena has an unusual lightcurve,〔R. Gil-Hutton ''(Research note: photometry of asteroids 359 Georgia and 789 Lena )'', Revista Mexicana de Astronomía y Astrofísica, Vol. 31, p. 143, (1995)〕 which indicated that it is either a very slow rotator (with period well over 22 hours), very irregular shaped, or both. Photometric observations at the Oakley Observatory in Terre Haute, Indiana during 2007 were used to build an updated light curve for 789 Lena. The asteroid displayed a rotation period of 5.85 ± 0.05 hours and a brightness variation of 0.5 ± 0.01 in magnitude.〔 ==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「789 Lena」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.