由 AI(Opus 5.5)根据英文卡片翻译。数字、名称和来源均未改动。
有已知行星的恒星
HD 42012
HD 42012是一颗K0型恒星,拥有一颗已确认的行星。
实测
- 距离
- 约120光年
- 恒星光谱型
- K0
- 已确认的行星
- 1
与太阳的距离
简介 120光年. 穿越它需要:
- 光120年
- 旅行者1号的速度2.13百万年
- 以100 km/h的速度行驶1.3亿年
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
- 2017年通过视向速度法发现首颗行星(NASA系外行星档案库)。
它的行星
- HD 42012 b — 14 times Earth's width (estimated from its mass, not measured), a giant, Jupiter-sized or more; its year lasts about 2 Earth years; about −90 °C, below freezing; found in 2017 by radial velocity.
The NASA Exoplanet Archive's page
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.