GJ 436 b
A confirmed exoplanet orbiting GJ 436.
Compared with Earth
- Size
- About 4.2 times Earth's width.
- Mass
- About 22 times Earth's mass.
- Year
- A year here lasts about 2.6 Earth days.
Planet
- Radius
- 4.17 × Earth
- Mass
- 22.1 × Earth
- Density
- 1.8 g/cm³
- Equilibrium temperature
- Unknown
- Starlight received
- Unknown
- Orbital period
- 2.644 days
- Average distance from its star
- 0.0291 AU
Star
- Host star
- GJ 436
- Spectral class
- Unknown
- Surface temperature
- Unknown
- Radius
- 0.455 × Sun
- Mass
- 0.47 × Sun
- Age
- Unknown
System
- Distance from Earth
- 31.81 light-years (9.753 parsecs)
- Stars in system
- 1
- Known planets
- 1
Discovery
- Year
- 2004
- Method
- Radial Velocity
- Facility
- W. M. Keck Observatory
Data from the NASA Exoplanet Archive, synced October 14, 2026.