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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 Theta² Crucis ： ウィキペディア英語版 Theta2 Crucis Theta2 Crucis (θ2 Cru / Theta2 Crucis) is a spectroscopic binary star in the constellation Crux. This pair of stars complete an orbit every 3.4280 days and they have a low orbital eccentricity that is close to 0.0.〔 Theta2 Crucis is located at about 750 light-years from the Sun.〔 The system has a combined mean apparent magnitude of +4.72m. Since a member of the system is a β Cephei-type variable star, the magnitude is not fixed but varies slightly between +4.70m and +4.74m. The period of this variability is 0.0889 days.〔 The system is categorized as is a blue-white subgiant with a stellar classification of B2 IV. ==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「Theta2 Crucis」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.