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南船四

船底座ω
Diagram showing star positions and boundaries of the Carina constellation and its surroundings船底座
观测资料
历元 J2000
星座 船底座
星官 南船近南极星区
赤经 10h 13m 44.21739s
赤纬 –70° 02′ 16.4563″
视星等(V) 3.29
特性
光谱分类B8III[1][2]
U−B 色指数-0.33[1][2]
B−V 色指数-0.08[1][2]
R−I 色指数-0.03[1][2]
天体测定
径向速度 (Rv)+7.0 km/s
自行 (μ) 赤经:-36.01 mas/yr
赤纬:+7.09 mas/yr
视差 (π)9 ± 0.09 mas
距离362 ± 4 ly
(111 ± 1 pc)
绝对星等 (MV)-1.98
详细资料
质量8 M
半径8.1 R
表面重力 (log g)3.581
亮度1,000 L
温度13,275 K
自转速度 (v sin i)245 km/s
其他命名
CP-69 1178,SAO 250885,HD 89080,HR 4037
参考数据库
SIMBAD资料

船底座Omega(船底座ω,ω Car)是一个位于船底座恒星赤纬比南纬70度更南,使它成为船底座最南边的亮星(视星等3等或更亮),该星是南天星群钻石十字的一部分。视星等3.29,距离地球大约370光年。

物理特性

船底座Omega的恒星分类为B8IIIe,属于在光谱里有着氢发射线的Be星。船底座Omega是一个壳层星,在赤道有一个气体环。亮度分类III代表这是一个已经演化成巨星的恒星,耗尽了核心的氢然后离开了主序星。该星的表面温度为13,275K使它成为一个发出蓝白色光芒的B型星。

该星自转快速,有着245km/s的恒星自转速度。这个恒星会开始崩裂的临界赤道速度为320km/s。它的自转轴和地球的视线倾斜70.8度。

在未来的7500年,南天极会经过这个恒星和船底座l附近。

参考文献

  1. ^ 1.0 1.1 1.2 1.3 引用错误:没有为名为SIMBAD的参考文献提供内容
  2. ^ 2.0 2.1 2.2 2.3 引用错误:没有为名为DATA的参考文献提供内容
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南船四
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