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Alpha Sagittae : ウィキペディア英語版 | Alpha Sagittae
Alpha Sagittae (Alpha Sge, α Sagittae, α Sge) is a star in the constellation Sagitta. It has the traditional proper name ''Sham'' or ''Alsahm'' which comes to us from Arabic سهم ''sahm'' and means ''Arrow'', the name formerly having been applied to the whole constellation. Alpha Sagittae is the third brightest star and is four times more massive and 340 times brighter than the Sun.〔(【引用サイトリンク】title=Sagitta )〕 In Chinese, (), meaning ''Left Flag'', refers to an asterism consisting of α Sagittae, β Sagittae, δ Sagittae, ζ Sagittae, γ Sagittae, 13 Sagittae, 11 Sagittae, 14 Sagittae and ρ Aquilae. Consequently, α Sagittae itself is known as (, (英語:the First Star of Left Flag).)〔 (AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 3 日 )〕 α Sge is a yellow bright giant star of apparent magnitude +4.38 and spectral class G1 II about 430 ± 10 light years from Earth. It has a luminosity 340 times that of the Sun with a surface temperature of 5,333 K.〔 The star's radius is roughly 20 times solar () while its mass is 4 times solar (). ==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「Alpha Sagittae」の詳細全文を読む
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