Voyager 1 at the speed it moved outward over the year to 2026-10-25 (JPL Horizons). Driving: nonstop, never refuelling.
Facts
LP 890-9 c has an equilibrium temperature between −50 and +50 °C.
How it was found
First planet found in 2022, by transit (NASA Exoplanet Archive).
Its planets
LP 890-9 b — 1.3 times Earth's width, about Earth-sized — probably rocky; its year lasts 3 days; about 120 °C, hotter than boiling water; found in 2022 by transit.
LP 890-9 c — 1.4 times Earth's width, about Earth-sized — probably rocky; its year lasts 8 days; about −1 °C, below freezing; found in 2022 by transit.
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.