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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 Psi Aquilae ： ウィキペディア英語版 Psi Aquilae Psi Aquilae (ψ Aql, ψ Aquilae) is the Bayer designation for a star in the equatorial constellation of Aquila. It is a faint star with an apparent visual magnitude of 6.25,〔 which, according to the Bortle Dark-Sky Scale, can be seen with the naked eye in dark rural skies. The orbit of the Earth causes an annual parallax shift of 3.22 mas,〔 which indicates a distance of roughly . The spectrum of Psi Aquilae matches a stellar classification of B9 III-IV,〔 with the luminosity class of III-IV indicating the spectrum lies part way between that of a subgiant and a giant star. The effective temperature of the star's outer atmosphere is 10,814 K,〔 giving it the blue-white hue of a B-type star.〔 It has nearly four〔 times the radius of the Sun and has a projected rotational velocity of 20 km/s.〔 ==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「Psi Aquilae」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.