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格利澤876e

格利澤876e
太陽系外行星 太陽系外行星列表

藝術家筆下的格利澤876e
母恆星
母恆星 格利澤876
星座 寶瓶座
赤经 (α) 22h 53m 16.73s
赤纬 (δ) −14° 15′ 49.3″
距離15.3 ly (4.72 pc)
光譜類型 M4V
軌道參數
半長軸 (a) 0.3343 ± 0.0013 [1] AU
軌道離心率 (e) 0.055 ± 0.012 [1]
公轉週期 (P) 124.26 ± 0.70 [1] d
軌道傾角 (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🜨
發現
發現時間 2010年6月23日
發現者 Rivera et al.
發現方法 都卜勒光譜學
發表論文 已發表論文[1]
數據庫參考
太陽系外行星
百科全書
data
SIMBADdata
格利澤876行星系中各行星的軌道。格利澤876e是距離母恆星最遠的。

格利澤876eGliese 876 e)是一個環繞恆星格利澤876太陽系外行星,位於寶瓶座

概要

[编辑]

格利澤876e和較內側的格利泽876c格利泽876b是1:2:4的拉普拉斯共振。即876e公轉一周,876b即公轉二周,而876c公轉四周。這是在木星的木衛一木衛二木衛三第一例1:2:4拉普拉斯共振之後第二個已知的例子[1]

格利澤876e的質量相當於天王星,軌道週期124日,約三分之一年。因為它的週期稍長於水星的軌道週期,母恆星的質量較太陽低代表了這個行星的軌道半長軸稍短於水星。和水星不同的是格利澤876e的軌道接近圓形,離心率為0.055 ± 0.012[1]

參考資料

[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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格利澤876e
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