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格利泽876e

格利泽876e
太阳系外行星 太阳系外行星列表

艺术家笔下的格利泽876e
母恒星
母恒星 格利泽876
星座 宝瓶座
赤经 (α) 22h 53m 16.73s
赤纬 (δ) −14° 15′ 49.3″
距离15.3 ly (4.72 pc)
光谱类型 M4V
轨道参数
半长轴 (a) 0.3343 ± 0.0013 [1] AU
轨道离心率 (e) 0.055 ± 0.012 [1]
公转周期 (P) 124.26 ± 0.70 [1] d
轨道倾角 (i) 59.5 [1]°
半振幅 (K) 3.42 ± 0.39 [1] m/s
物理性质
质量(m)14.6 ± 1.7 [1] M🜨
发现
发现时间 2010年6月23日
发现者 Rivera et al.
发现方法 多普勒光谱学
发表论文 已发表论文[1]
数据库参考
太阳系外行星
百科全书
data
SIMBADdata
格利泽876行星系中各行星的轨道。格利泽876e是距离母恒星最远的。

格利泽876eGliese 876 e)是一个环绕恒星格利泽876太阳系外行星,位于宝瓶座

概要

[编辑]

格利泽876e和较内侧的格利泽876c格利泽876b是1:2:4的拉普拉斯共振。即876e公转一周,876b即公转二周,而876c公转四周。这是在木星的木卫一木卫二木卫三第一例1:2:4拉普拉斯共振之后第二个已知的例子[1]

格利泽876e的质量相当于天王星,轨道周期124日,约三分之一年。因为它的周期稍长于水星的轨道周期,母恒星的质量较太阳低代表了这个行星的轨道半长轴稍短于水星。和水星不同的是格利泽876e的轨道接近圆形,离心率为0.055 ± 0.012[1]

参考资料

[编辑]
  1. ^ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 Rivera, Eugenio J.; et al. The Lick-Carnegie Exoplanet Survey: A Uranus-mass Fourth Planet for GJ 876 in an Extrasolar Laplace Configuration. The Astrophysical Journal. July 2010, 719 (1): 890–899 [2012-03-11]. Bibcode:2010ApJ...719..890R. arXiv:1006.4244可免费查阅. doi:10.1088/0004-637X/719/1/890. (原始内容存档于2019-12-11). 
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格利泽876e
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