K2-201

实测

距离

约646光年

已确认的行星

2

与太阳的距离

简介 646光年. 穿越它需要：

• 光646年
• 旅行者1号的速度11.5百万年
• 以100 km/h的速度行驶6.97亿年

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

• K2-201 c — 3.3 times Earth's width, a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 23 days; found in 2018 by transit.
• K2-201 b — 1.4 times Earth's width, about Earth-sized — probably rocky; its year lasts 25 hours; 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。