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HD 73526

HD 73526
观测资料
历元 J2000.0
星座 船帆座
星官
赤经 08h 37m 16.4839s
赤纬 -41° 19′ 08.767″
视星等(V) +9.00
特性
光谱分类G6V
U−B 色指数?
B−V 色指数0.69
V−R 色指数?
R−I 色指数?
变星类型
天体测定
径向速度 (Rv)+26.1 km/s
自行 (μ) 赤经:–60.31 mas/yr
赤纬:161.70 mas/yr
视差 (π)10.57 ± 1.01 mas
距离310 ± 30 ly
(95 ± 9 pc)
绝对星等 (MV)+4.02
详细资料
质量1.02 M
半径1.49 R
表面重力 (log g)4.08
亮度1.77 L
温度5470 K
金属量+0.28
自转? days
年龄5.59 Gyr
其他命名
参考数据库
SIMBAD资料

HD 73526是一颗黄矮星(G6V),位于大约323光年之外的船帆座中。

恒星

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这颗恒星比太阳更冷、更亮,质量相近,而体积更大。它比太阳的年龄大22%,金属量几乎是太阳的两倍,因为其中富含

行星系

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2002年时发现了一颗2.1倍MJ的行星HD 73526 b围绕它公转,轨道只比进行绕太阳的轨道略近一些。[1]这颗行星接受到的日射是地球的3.65倍,金星的1.89倍。这被认为是一个单行星系统,直到2006年发现了第二颗行星,2.3MJHD 73526 c。这颗行星与另一颗形成了2:1的轨道共振[2]质量仍然只是下限,因为轨道倾角仍然不知道。

HD 73526的行星系[2]
成员
(依恒星距离)
质量 半长轴
(AU)
轨道周期
()
离心率 倾角 半径
b >2.07 ± 0.16 MJ 0.66 ± 0.05 187.5 ± 0.3 0.39 ± 0.05
c >2.30 ± 0.17 MJ 1.05 ± 0.08 376.9 ± 0.9 0.40 ± 0.05

参见

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参考资料

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  1. ^ Tinney; Butler, R. Paul; Marcy, Geoffrey W.; Jones, Hugh R. A.; Penny, Alan J.; McCarthy, Chris; Carter, Brad D.; Bond, Jade; et al. Four New Planets Orbiting Metal-enriched Stars. The Astrophysical Journal. 2003, 587 (1): 423–428. Bibcode:2003ApJ...587..423T. arXiv:astro-ph/0207128可免费查阅. doi:10.1086/368068. 
  2. ^ 2.0 2.1 Tinney; Butler, R. Paul; Marcy, Geoffrey W.; Jones, Hugh R. A.; Laughlin, Gregory; Carter, Brad D.; Bailey, Jeremy A.; O’toole, Simon; et al. The 2 : 1 Resonant Exoplanetary System Orbiting HD 73526. The Astrophysical Journal. 2006, 647 (1): 594–599. Bibcode:2006ApJ...647..594T. arXiv:astro-ph/0602557可免费查阅. doi:10.1086/503706. 

外部链接

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HD 73526
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