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天市右垣十

蛇夫座ε(天市右垣十、楚)
Epsilon Ophiuchi

蛇夫座δ在蛇夫座的位置(右边中间)
觀測資料
曆元 J2000
星座 蛇夫座
星官 天市垣 天市右垣
赤經 16h 18m 19.30s[1]
赤緯 −04° 41′ 33.0″
視星等(V) 3.24[1]
特性
光谱分类G9.5[1]
天体测定
自行 (μ) 赤经:0[1] mas/yr
赤纬:0[1] mas/yr
绝对星等 (MV)+3.24
詳細資料
金屬量[1]
其他命名
2 Oph, HR 6075, HD 146791, HIP 79882

蛇夫座ε,中文星官名天市右垣十,是一颗位于蛇夫座G型巨星

它和蛇夫座δ一起组成光学双星。蛇夫座ε距离地球108光年,而蛇夫座δ距离地球170光年,因此它们之间并没有物理联系,只是从地球上观察时处于几乎相同的方向上。

蛇夫座ε在中国星官系统中属于天市右垣,即天市垣的右城墙,天市右垣共由十一星组成,每颗星都由诸侯国或王国命名,而蛇夫座ε是以“楚”命名。蛇夫座ε是天市右垣的第十星,因此又被称为天市右垣十[2][3][4]。蛇夫座ε的西方名字叫Yed Posterior,它和蛇夫座δ一起合称为Yed,这个名字来自于阿拉伯语,意思是“手”, 两颗星共同象征蛇夫握住巨蛇头部的左手。

参考资料

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天市右垣十
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