Kepler-9 b
A confirmed exoplanet orbiting Kepler-9.
Compared with Earth
- Size
- About 8.3 times Earth's width.
- Mass
- About 43 times Earth's mass.
- Year
- A year here lasts about 19 Earth days.
Planet
- Radius
- 8.29 × Earth
- Mass
- 43.4 × Earth
- Density
- 0.42 g/cm³
- Equilibrium temperature
- Unknown
- Starlight received
- Unknown
- Orbital period
- 19.24 days
- Average distance from its star
- 0.143 AU
Star
- Host star
- Kepler-9
- Spectral class
- G — sun-like
- Surface temperature
- 5,774 K
- Radius
- 0.958 × Sun
- Mass
- 1.022 × Sun
- Age
- 2 billion years
System
- Distance from Earth
- 2,049 light-years (628.3 parsecs)
- Stars in system
- 1
- Known planets
- 3
Discovery
- Year
- 2010
- Method
- Transit
- Facility
- Kepler
Data from the NASA Exoplanet Archive, synced October 14, 2026.