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格利泽1002

GJ 1002
观测资料
历元 J2000
星座 鲸鱼座
星官
赤经 00h 06m 43.2s
赤纬 -07° 32′ 17″
视星等(V) 13.73
特性
光谱分类M5.5 V
U−B 色指数1.78
B−V 色指数1.97
变星类型None
天体测定
径向速度 (Rv)-41. km/s
自行 (μ) 赤经:-749 mas/yr
赤纬:-1922 mas/yr
视差 (π)213.00 ± 3.3 mas
距离15.3 ± 0.2 ly
(4.69 ± 0.07 pc)
绝对星等 (MV)15.37
详细资料 [1]
质量0.120±0.010 M
半径0.137±0.005 R
表面重力 (log g)5.10±0.06
亮度 (bolometric)0.001406±0.000019 L
温度3024±52 K
金属量 [Fe/H]−0.25±0.19 dex
自转126±15 d
其他命名
GJ 1002, LHS 2, GCTP 9.01, G 158-27.

GJ 1002是一颗红矮星,离太阳相对较近,只有15.31光年。它位于鲸鱼座中。

它似乎是一颗相对不活跃的恒星,至今没有观测到耀斑活动

行星系统

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格利泽1002的两颗行星在2022年通过径向速度法发现。两者都具有接近地球的质量,并且在其恒星的宜居带内运行。虽然这些行星不会凌日于它们的主星,但有可能通过未来的仪器(例如用于超大望远镜的ANDES光谱仪)确定大气的存在和成分。[1]

格利泽1002行星系统[1]
成员
(以距离排序)
质量 半长轴
(AU)
轨道周期
()
离心率 倾角 半径
b ≥1.08±0.13 M 0.0457±0.0013 10.3465±0.027
c ≥1.36±0.17 M 0.0738±0.0021 20.202±0.013

参考资料

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  1. ^ 1.0 1.1 1.2 Suárez Mascareño, A.; González-Alvarez, E.; et al. Two temperate Earth-mass planets orbiting the nearby star GJ 1002. Astronomy & Astrophysics. December 2022, 670: A5. Bibcode:2023A&A...670A...5S. S2CID 254353639. arXiv:2212.07332可免费查阅. doi:10.1051/0004-6361/202244991. 

外部链接

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格利泽1002
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