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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 Beta Leporis ： ウィキペディア英語版 Beta Leporis Beta Leporis (Beta Lep, β Leporis, β Lep) is the second brightest star in the constellation of Lepus.〔 It is also known as Nihal,"quenching their thirst". The occasional spelling ''Nibal'' appears to be due to a misreading.〔 Based on parallax measurements from the Hipparcos astrometry satellite,〔 this star is located about from the Earth. It has an apparent visual magnitude of 2.84 and a stellar classification of G5 II. The mass of this star is 3.5 times the mass of the Sun and it is about 240 million years old,〔 which is sufficient time for a star this massive to consume the hydrogen at its core and evolve away from the main sequence, becoming a G-type bright giant.〔 This is a double star system and may be a binary. Using adaptive optics on the AEOS telescope at Haleakala Observatory, the pair was found to be separated by an angle of 2.58 arcseconds at a position angle of 1.4°.〔 Component B has been observed to fluctuate in brightness and is catalogued as suspected variable star NSV 2008. 〔 ==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「Beta Leporis」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.