Kepler-37 d
A confirmed exoplanet orbiting Kepler-37.
Compared with Earth
- Size
- About 2 times Earth's width.
- Mass
- About 2 times Earth's mass.
- Temperature
- About 226 °C (439 °F) from starlight alone, against -18 °C (-1 °F) for Earth measured the same way.
- Starlight
- About 10 times the starlight Earth gets from the Sun.
- Year
- A year here lasts about 40 Earth days.
Planet
- Radius
- 2.03 × Earth
- Mass
- 2 × Earth
- Density
- 1.3 g/cm³
- Equilibrium temperature
- 499 K
- Starlight received
- 10.39 × Earth
- Orbital period
- 39.79 days
- Average distance from its star
- 0.2109 AU
Star
- Host star
- Kepler-37
- Spectral class
- G — sun-like
- Surface temperature
- 5,357 K
- Radius
- 0.789 × Sun
- Mass
- 0.79 × Sun
- Age
- 7.6 billion years
System
- Distance from Earth
- 208.5 light-years (63.92 parsecs)
- Stars in system
- 1
- Known planets
- 4
Discovery
- Year
- 2013
- Method
- Transit
- Facility
- Kepler
Data from the NASA Exoplanet Archive, synced October 14, 2026.