The GJ 3138 System
GJ 3138 is a planetary system in the constellation Cetus hosting 3 confirmed exoplanets, about 93 light-years from Earth.
GJ 3138: Star and Habitable Zone
GJ 3138
- Spectral type
- M0
- Surface temperature
- 3,717 K (Sun: 5,772 K)
- Mass
- 0.68 M☉
- Radius
- 0.50 R☉
- Luminosity
- 0.0450 L☉
Habitable zone of GJ 3138: 0.173–0.444 AU (conservative: 0.219–0.421 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
See the full interactive habitable-zone view in the Exoplanet Explorer app ›
All 3 Planets in the GJ 3138 System
Discovery History
The first planet found here, GJ 3138 b, was discovered in 2017 using the radial velocity method.
Frequently Asked Questions About GJ 3138
How many planets does GJ 3138 have?
GJ 3138 has 3 confirmed exoplanets. More may await discovery.
Are any planets in the GJ 3138 system habitable?
None of the known planets in GJ 3138 orbit within the star's habitable zone.
How far away is GJ 3138?
GJ 3138 is about 93 light-years from Earth in the constellation Cetus.
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