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开普勒20b

Kepler-20b
太阳系外行星 太阳系外行星列表
母恒星
母恒星 开普勒20(KOI-070)
星座 天琴座
赤经 (α) 19h 10m 47.524s
赤纬 (δ) +42° 20′ 19.30″
物理性质
质量(m)8.7 +2.1
−2.2
M🜨
半径(r)1.91 +0.12
−0.21
R🜨
密度(ρ)6.5 +2.0
−2.7
g cm-3
温度 (T) 1014 K
轨道参数
半长轴 (a) 0.04537 AU
轨道离心率 (e) <0.32
公转周期 (P) 3.6961219 d
轨道倾角 (i) 86.50 +0.36
−0.31
发现
发现时间 2011年12月20日
发现者 Kepler team
发现方法 凌日法开普勒太空望远镜
发表论文 研讨会公布

开普勒20bKepler-20b)是一个环绕位于天琴座的恒星开普勒20系外行星

概要

[编辑]

开普勒20b的质量与海王星相当,但因为它相当接近母恒星,被分类为“热海王星”。开普勒20b和同一行星系中其他四颗行星一起于2011年12月20日被宣布发现。

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开普勒20b
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