K2-243

实测

距离

约870光年

已确认的行星

2

与太阳的距离

简介 870光年. 穿越它需要：

• 光870年
• 旅行者1号的速度15.5百万年
• 以100 km/h的速度行驶9.39亿年

旅行者1号以截至2026-10-25的一年中向外运动的速度（JPL Horizons）。驾车：不停歇，永不加油。

发现方式

• 2018年通过凌星法发现首颗行星（NASA系外行星档案库）。

它的行星

• K2-243 c — 2 times Earth's width, a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 25 days; about 530 °C, hotter than boiling water; found in 2018 by transit.
• K2-243 b — 2.2 times Earth's width, a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 12 days; about 760 °C, hotter than boiling water; found in 2018 by transit.

资料来源

• NASA Exoplanet Archive, Planetary Systems Composite Parameters (fetched 2026-11-02). Composite values: where a planet's size or mass was not measured, the archive estimates it from the other.
• This research has made use of the NASA Exoplanet Archive, which is operated by the California Institute of Technology, under contract with NASA under the Exoplanet Exploration Program.

Ouranos所使用的每个星表均在致谢页中注明。