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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 20461 Dioretsa ： ウィキペディア英語版 20461 Dioretsa Dioretsa () is a centaur〔 discovered in 1999 notable for its unusual orbit, which is highly eccentric and retrograde. Its name is the word 'asteroid' spelled backwards to reflect this fact. It is one of twenty or so known minor planets in the Solar System that have a retrograde orbit—see the List of exceptional asteroids. Dioretsa's orbit is otherwise similar to that of a comet. It has a perihelion of 2.4 AU and an aphelion of 45.2 AU. This has led to speculation that Dioretsa was originally an object from the Oort cloud. ==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「20461 Dioretsa」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.