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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 Tau¹ Gruis ： ウィキペディア英語版 Tau1 Gruis Tau1 Gruis (τ1 Gru, τ1 Gruis), also catalogued as HD 216435 and HR 8700, is a yellow dwarf star approximately 106 light-years away〔 in the constellation of Grus (the Crane). The star is visible to the naked eye for some people, placing it in the Bright Star Catalogue. In 2002, one extrasolar planet was confirmed to orbit the star. == Characteristics == Tau1 Gruis is a yellow dwarf star of the possible spectral type of G0-3 V-IV. It is thought that the star has about 1.25 times more mass than the Sun, a probable large radius, and about 3.6 times more luminosity. Due to its unusual brightness, at least one source suspects that the star may be a highly evolved subgiant star.〔 It is thought that Tau1 Gruis is about 1.4 times more enriched with elements heavier than hydrogen, making a high abundance of iron likely. The Ca-II H line of the star suggests that it is chromospherically inactive, making it significantly older than previously predicted. 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「Tau1 Gruis」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.