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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 137 Meliboea ： ウィキペディア英語版 137 Meliboea 137 Meliboea is a large, dark main-belt asteroid that was discovered by Austrian astronomer J. Palisa on April 21, 1874, the second of his many asteroid discoveries, and named after one of the three Meliboeas in Greek mythology. The largest body in the Meliboea family of asteroids that share similar orbital elements, only 791 Ani approaches its size. It is classified as a C-type asteroid and may be composed of carbonaceous materials. Photometric observations of this asteroid made at the Torino Observatory in Italy during 1990–1991 were used to determine a synodic rotation period of 15.28 ± 0.02 hours.〔 A 2009 study at the Organ Mesa Observatory in Las Cruces, New Mexico found a period of 25.676 ± 0.001 hours and a brightness variation of 0.16 ± 0.02 in magnitude. They ruled out a period of 15 hours determined in previous studies.〔 During 2002, 137 Meliboea was observed by radar from the Arecibo Observatory. The return signal matched an effective diameter of 144 ± 16 km. This is consistent with the asteroid dimensions computed through other means.〔 ==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「137 Meliboea」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.