Kepler-42 b
A confirmed exoplanet orbiting Kepler-42.
Compared with Earth
- Size
- About 78% of Earth's width.
- Temperature
- About 246 °C (475 °F) from starlight alone, against -18 °C (-1 °F) for Earth measured the same way.
- Year
- A year here lasts about 1.2 Earth days.
Planet
- Radius
- 0.78 × Earth
- Mass
- Unknown
- Density
- Unknown
- Equilibrium temperature
- 519 K
- Starlight received
- Unknown
- Orbital period
- 1.214 days
- Average distance from its star
- 0.0116 AU
Star
- Host star
- Kepler-42
- Spectral class
- M — red dwarf
- Surface temperature
- 3,068 K
- Radius
- 0.17 × Sun
- Mass
- 0.13 × Sun
- Age
- 4.5 billion years
System
- Distance from Earth
- 130.7 light-years (40.06 parsecs)
- Stars in system
- 1
- Known planets
- 3
Discovery
- Year
- 2011
- Method
- Transit
- Facility
- Kepler
Data from the NASA Exoplanet Archive, synced October 14, 2026.