GJ 338 B b
A confirmed exoplanet orbiting GJ 338 B.
Compared with Earth
- Mass
- About 11 times Earth's mass.
- Year
- A year here lasts about 24 Earth days.
Planet
- Radius
- Unknown
- Mass
- 10.6 × Earth
- Density
- Unknown
- Equilibrium temperature
- Unknown
- Starlight received
- Unknown
- Orbital period
- 24.42 days
- Average distance from its star
- 0.142 AU
Star
- Host star
- GJ 338 B
- Spectral class
- K — orange dwarf
- Surface temperature
- 4,014 K
- Radius
- 0.58 × Sun
- Mass
- 0.64 × Sun
- Age
- 4 billion years
System
- Distance from Earth
- 20.65 light-years (6.333 parsecs)
- Stars in system
- 2
- Known planets
- 1
Discovery
- Year
- 2020
- Method
- Radial Velocity
- Facility
- Calar Alto Observatory
Data from the NASA Exoplanet Archive, synced October 14, 2026.