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Tau1 Serpentis (Tau1 Ser, τ1 Serpentis, τ1 Ser) is an M-type giant star in the constellation of Serpens, approximately 900 light-years from Earth.〔 It has an apparent visual magnitude which varies between 5.13 and 5.20.〔 ==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 Serpentis」の詳細全文を読む スポンサード リンク
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