Gliese 12, an M4 V star, has one confirmed planet.
Measured
Distance
about 39.8 light-years
Star's spectral type
M4 V
Confirmed planets
1
How far, from the Sun
About 39.8 light-years. To cross it:
Light39.8 years
Voyager 1's speed707,000 years
Driving at 100 km/h430 million years
Voyager 1 at the speed it moved outward over the year to 2026-10-25 (JPL Horizons). Driving: nonstop, never refuelling.
Facts
Gliese 12 b has an equilibrium temperature between −50 and +50 °C.
How it was found
First planet found in 2024, by transit (NASA Exoplanet Archive).
Its planets
Gliese 12 b — 0.9 times Earth's width, about Earth-sized — probably rocky; its year lasts 13 days; about 42 °C, between freezing and boiling; found in 2024 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.