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海石二

海石二
观测资料
历元 J2000
星座 船底座
星官 近南极星区 海石
赤经 09h 17m 05.4s
赤纬 -59° 16′ 31″
视星等(V) 2.21
特性
光谱分类A8 Ib
U−B 色指数0.16
B−V 色指数0.18
变星类型Suspected
天体测定
径向速度 (Rv)13 km/s
自行 (μ) 赤经:-19.03 mas/yr
赤纬:13.11 mas/yr
视差 (π)4.71 ± 0.46 mas
距离690 ± 70 ly
(210 ± 20 pc)
绝对星等 (MV)−4.46
其他命名
HR 3699, HD 80404, SAO 236808, FK5 351, CoD−58°2529, CP−58°1465, NSV 04444, HIP 45556, GC 12831
参考数据库
SIMBAD资料

海石二(ι Car / 船底座ι) 是船底座的恒星。它是夜空中最亮的恒星之一,俗名Aspidiske, Scutulum和Turais (Tureis)。Turais来源于阿拉伯语تُرَيْس turais "盾", 而Aspidiske和Scutulum则分别是其希腊译名和拉丁译名:ασπίδα和scūtum "盾".

海石二光谱型为A8或F0,很可能是一颗巨大的白星或黄-白星。由于岁差的原因,海石二将在公元8100年成为南极星

参见

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海石二
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