GJ 238 b
A confirmed exoplanet orbiting GJ 238.
Compared with Earth
- Size
- About 57% of Earth's width.
- Temperature
- About 485 °C (905 °F) from starlight alone, against -18 °C (-1 °F) for Earth measured the same way.
- Year
- A year here lasts about 1.7 Earth days.
Planet
- Radius
- 0.566 × Earth
- Mass
- Unknown
- Density
- Unknown
- Equilibrium temperature
- 758 K
- Starlight received
- Unknown
- Orbital period
- 1.745 days
- Average distance from its star
- 0.02123 AU
Star
- Host star
- GJ 238
- Spectral class
- M — red dwarf
- Surface temperature
- 3,485 K
- Radius
- 0.4314 × Sun
- Mass
- 0.4193 × Sun
- Age
- Unknown
System
- Distance from Earth
- 49.62 light-years (15.21 parsecs)
- Stars in system
- 1
- Known planets
- 1
Discovery
- Year
- 2024
- Method
- Transit
- Facility
- Transiting Exoplanet Survey Satellite (TESS)
Data from the NASA Exoplanet Archive, synced October 14, 2026.