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开普勒88

Kepler-88
观测资料
历元
星座 天琴座
星官
赤经 +19:24:35.54
赤纬 +40:40:9.87
视星等(V) 13.113
特性
天体测定
距离1105 ly
(339 pc)
详细资料
质量0.96 M
半径0.88 R
温度5471 K
金属量 [Fe/H]+0.2 dex
年龄3.9 ± 0.3 Gyr
其他命名
KOI-142

开普勒88Kepler-88)是天琴座内已知拥有两颗系外行星的类太阳恒星。2012年4月科学家在该恒星旁发现行星候选天体 KOI-142.01(即开普勒88b)有极为明显的凌星时间变化[1]。凌日时间的变化相当大,足以让开普勒88b改变凌星周期。这样的状态是量测两颗行星质量的严谨限制条件。而另一颗不凌星的行星则于2013年11月以径向速度法近一步证实[2]

行星系统

[编辑]

距离开普勒88较近的行星体积与海王星相当,但密度几乎只有海王星一半。较外侧行星的质量大约是木星的60%,但因为它并不凌星,无法得知其半径。

Kepler-88的行星系
成员
(依恒星距离)
质量 半长轴
(AU)
轨道周期
()
离心率 倾角 半径
b 8.70 M 0.098 ~10.95416 0.056 89.055° 3.780 R
c 0.626 MJ 0.15525 22.3395 0.056 86.2°

参考资料

[编辑]
  1. ^ KOI-142, the King of Transit Variations, is a Pair of Planets near the 2:1 Resonance[永久失效链接]: David Nesvorny, David Kipping, Dirk Terrell, Joel Hartman, Gaspar A. Bakos, Lars A. Buchhave. 15 April, 2013
  2. ^ SOPHIE velocimetry of kepler transit candidates:X KOI-142c: first radial velocity confirmation of a non-transiting exoplanet discovered by transit timing页面存档备份,存于互联网档案馆): S.C.C. Barros (1), R. F. Diaz, A. Santerne, G. Bruno, M. Deleuil, J.M. Almenara, A.S. Bonomo, F. Bouchy, C. Damiani, G. Hebrard, G. Montagnier, C. Moutou (1- Laboratoire d'astrophysique de Marseille)2
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开普勒88
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