Kepler-39 b
A confirmed exoplanet orbiting Kepler-39.
Compared with Earth
- Size
- About 14 times Earth's width.
- Mass
- About 6,388 times Earth's mass.
- Temperature
- About 624 °C (1,155 °F) from starlight alone, against -18 °C (-1 °F) for Earth measured the same way.
- Year
- A year here lasts about 21 Earth days.
Planet
- Radius
- 13.9 × Earth
- Mass
- 6,388 × Earth
- Density
- 13 g/cm³
- Equilibrium temperature
- 897 K
- Starlight received
- Unknown
- Orbital period
- 21.09 days
- Average distance from its star
- 0.164 AU
Star
- Host star
- Kepler-39
- Spectral class
- F — yellow-white
- Surface temperature
- 6,350 K
- Radius
- 1.4 × Sun
- Mass
- 1.29 × Sun
- Age
- 2.1 billion years
System
- Distance from Earth
- 3,449 light-years (1,057 parsecs)
- Stars in system
- 1
- Known planets
- 1
Discovery
- Year
- 2011
- Method
- Transit
- Facility
- Kepler
Data from the NASA Exoplanet Archive, synced October 14, 2026.