Kepler-399 b
A confirmed exoplanet orbiting Kepler-399.
Compared with Earth
- Size
- About 96% of Earth's width.
- Year
- A year here lasts about 14 Earth days.
Planet
- Radius
- 0.96 × Earth
- Mass
- Unknown
- Density
- Unknown
- Equilibrium temperature
- Unknown
- Starlight received
- Unknown
- Orbital period
- 14.43 days
- Average distance from its star
- 0.103 AU
Star
- Host star
- Kepler-399
- Spectral class
- G — sun-like
- Surface temperature
- 5,502 K
- Radius
- 0.68 × Sun
- Mass
- Unknown
- Age
- Unknown
System
- Distance from Earth
- 2,415 light-years (740.5 parsecs)
- Stars in system
- 1
- Known planets
- 3
Discovery
- Year
- 2014
- Method
- Transit
- Facility
- Kepler
Data from the NASA Exoplanet Archive, synced October 14, 2026.