Kepler-138 e
A confirmed exoplanet orbiting Kepler-138.
Compared with Earth
- Mass
- About 43% of Earth's mass.
- Temperature
- About 19 °C (66 °F) from starlight alone, against -18 °C (-1 °F) for Earth measured the same way.
- Starlight
- About 1.7 times the starlight Earth gets from the Sun.
- Year
- A year here lasts about 38 Earth days.
Planet
- Radius
- Unknown
- Mass
- 0.43 × Earth
- Density
- Unknown
- Equilibrium temperature
- 292 K
- Starlight received
- 1.73 × Earth
- Orbital period
- 38.23 days
- Average distance from its star
- 0.1803 AU
Star
- Host star
- Kepler-138
- Spectral class
- M — red dwarf
- Surface temperature
- 3,841 K
- Radius
- 0.535 × Sun
- Mass
- 0.535 × Sun
- Age
- Unknown
System
- Distance from Earth
- 218.1 light-years (66.86 parsecs)
- Stars in system
- 1
- Known planets
- 4
Discovery
- Year
- 2022
- Method
- Transit Timing Variations
- Facility
- Multiple Observatories
Data from the NASA Exoplanet Archive, synced October 14, 2026.