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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 Aquarii ： ウィキペディア英語版 Tau1 Aquarii Tau1 Aquarii (τ1 Aqr, τ1 Aquarii) is the Bayer designation for a star in the equatorial constellation of Aquarius. With an apparent visual magnitude of 5.66,〔 it is a faint naked eye that requires dark suburban skies for viewing. Parallax measurements made during the Hipparcos mission yield a distance estimate of roughly from Earth.〔 τ1 Aquarii has a stellar classification of B9 V;〔 right along the borderline between a B- and A-type main sequence star. It is around 100〔 million years old and has twice the Sun's radius.〔 When examined in the infrared band, it displays an excess emission that is a characteristic of stars with an orbiting debris disk. Indeed, the model that best fits the data suggests there are two concentric circumstellar disks.〔 ==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「Tau1 Aquarii」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.