GJ 357 b
A confirmed exoplanet orbiting GJ 357.
Compared with Earth
- Size
- About 1.2 times Earth's width.
- Temperature
- About 245 °C (473 °F) from starlight alone, against -18 °C (-1 °F) for Earth measured the same way.
- Year
- A year here lasts about 3.9 Earth days.
Planet
- Radius
- 1.2 × Earth
- Mass
- Unknown
- Density
- Unknown
- Equilibrium temperature
- 518 K
- Starlight received
- Unknown
- Orbital period
- 3.931 days
- Average distance from its star
- 0.036 AU
Star
- Host star
- GJ 357
- Spectral class
- M — red dwarf
- Surface temperature
- 3,505 K
- Radius
- 0.337 × Sun
- Mass
- 0.342 × Sun
- Age
- Unknown
System
- Distance from Earth
- 30.8 light-years (9.442 parsecs)
- Stars in system
- 1
- Known planets
- 3
Discovery
- Year
- 2019
- Method
- Transit
- Facility
- Transiting Exoplanet Survey Satellite (TESS)
Data from the NASA Exoplanet Archive, synced October 14, 2026.