GJ 3929 b
A confirmed exoplanet orbiting GJ 3929.
Compared with Earth
- Size
- About 1.1 times Earth's width.
- Mass
- About 1.8 times Earth's mass.
- Temperature
- About 295 °C (563 °F) from starlight alone, against -18 °C (-1 °F) for Earth measured the same way.
- Starlight
- About 17 times the starlight Earth gets from the Sun.
- Year
- A year here lasts about 2.6 Earth days.
Planet
- Radius
- 1.09 × Earth
- Mass
- 1.75 × Earth
- Density
- 7.3 g/cm³
- Equilibrium temperature
- 568 K
- Starlight received
- 17.3 × Earth
- Orbital period
- 2.616 days
- Average distance from its star
- 0.0252 AU
Star
- Host star
- GJ 3929
- Spectral class
- M — red dwarf
- Surface temperature
- 3,384 K
- Radius
- 0.32 × Sun
- Mass
- 0.313 × Sun
- Age
- 7.1 billion years
System
- Distance from Earth
- 51.56 light-years (15.81 parsecs)
- Stars in system
- 1
- Known planets
- 2
Discovery
- Year
- 2022
- Method
- Transit
- Facility
- Transiting Exoplanet Survey Satellite (TESS)
Data from the NASA Exoplanet Archive, synced October 14, 2026.