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巨蛇座ω

ω Serpentis
观测资料
历元 J2000.0
星座 Serpens
星官 (({星官))}
赤经 15h 50m 17.5s
赤纬 +02° 11' 47"
视星等(V) +5.21
距离 263 ± 15 光年
(81 ± 5 pc)
光谱分类 G8III
其他命名
34 Serpentis, HR 5888,
HD 141680, SAO 121215,
HIP 77578

巨蛇座ω(ω Ser、ω Serpentis)是一颗位于巨蛇座恒星

物理性质

[编辑]

巨蛇座ω是一颗黄色的G型巨星视星等为+5.21。

根据从地球上观察到的每年11.93 mas的视差变化,天文学家推测巨蛇座ω距离太阳约273光年。 在这个距离上,由于星际尘埃,视星等会减弱0.19等。它是大熊座移动星群的成员,位于这组恒星的外侧,共同移动方向大致一样。

巨蛇座ω的年龄估计约为40亿年,恒星分类为G8 III。它是一颗红群聚星,意味着核心透过氦核聚变产生能量。这颗恒星的质量估计为太阳的120%,但已膨胀至太阳半径的10.48倍。它的光球层辐射光度是太阳光度的69倍,温度为4,797 K[1]

参考资料

[编辑]
  1. ^ Jofré, E.; et al, Stellar parameters and chemical abundances of 223 evolved stars with and without planets, Astronomy & Astrophysics, 2015, 574: A50, Bibcode:2015A&A...574A..50J, S2CID 53666931, arXiv:1410.6422可免费查阅, doi:10.1051/0004-6361/201424474, A50. 
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巨蛇座ω
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