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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 Phi Aquilae ： ウィキペディア英語版 Phi Aquilae Phi Aquilae (φ Aql, φ Aquilae) is the Bayer designation of a binary star〔 system in the equatorial constellation of Aquila. It has an apparent visual magnitude of +5.28〔 and is visible to the naked eye. With an annual parallax shift of 14.86 mas,〔 this star is located at a distance of approximately from Earth. Phi Aquilae is a single-lined spectroscopic binary with an orbital period of 3.32068 days.〔 The primary component is a subgiant star with a stellar classification of A1 IV.〔 The outer atmosphere has an effective temperature of 9,509,〔 giving it a white-hued appearance of an A-type star.〔 The orbiting companion may be the source of the X-ray emission from this system, as stars similar to the primary component do not generally produce detectable levels of X-rays.〔 ==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「Phi 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.