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40 Arietis
40 Arietis is the Flamsteed designation for a binary star〔 system in the northern constellation of Aries. Their combined apparent magnitude is 5.82,〔 putting the system near the limit of naked eye visibility. Based upon an annual parallax shift of just 7.06 mas,〔 it is away from the Sun, give or take a 30 light-year margin of error. At that distance, its brightness is diminished by 0.21 in magnitude from extinction caused by interstellar gas and dust.〔 This is a spectroscopic binary with an angular separation of 0.2 arcseconds between the two components.〔 Their merged spectrum matches that of an evolved giant star with a stellar classification of K1 III.〔 ==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「40 Arietis」の詳細全文を読む
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