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Upsilon Aquilae : ウィキペディア英語版 | Upsilon Aquilae
Upsilon Aquilae (υ Aql, υ Aquilae) is the Bayer designation for a star in the equatorial constellation of Aquila. With an apparent visual magnitude of +5.91〔 it is a faint star but visible to the naked eye from suburban skies. It has an annual parallax shift of 18.65 milliarcsecond,〔 indicating a distance of around . Upsilon Aquilae is a subgiant star with a stellar classification of A3 IV.〔 The outer atmosphere is radiating energy into space at an effective temperature of 7,906 K,〔 which gives it the white-hot glow of an A-type star. It is spinning relatively quickly with a projected rotational velocity of 42 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「Upsilon Aquilae」の詳細全文を読む
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