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海豚座18b

海豚座18b
艺术家笔下的海豚座18b
发现
发现者佐藤文卫等人
发现日期2008年2月18日
径向速度法
轨道参数
半长轴2.6天文单位
离心率0.08±0.01
轨道周期993.3±3.2地球日
近心点经度166.1±6.5°
近心点时间2451672±18儒略日
物理特征
平均半径~0.758倍木星半径
质量10.3倍木星质量
温度~400K
视星等5.52
海豚座18的径向速度变化

海豚座18b是一颗位于海豚座、距离地球238光年的系外行星,其母星是黄巨星海豚座18。这颗行星的质量和密度都很大,其质量下限为10.3倍木星质量,公转周期为993个地球日。该行星于2008年2月19日为佐藤文卫等人所发现。

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海豚座18b
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