Kepler-22 b
A confirmed exoplanet orbiting Kepler-22.
Compared with Earth
- Size
- About 2.1 times Earth's width.
- Mass
- About 9.1 times Earth's mass.
- Temperature
- About 6 °C (43 °F) from starlight alone, against -18 °C (-1 °F) for Earth measured the same way.
- Starlight
- Almost exactly the starlight Earth gets from the Sun.
- Year
- A year here lasts about 290 Earth days.
Planet
- Radius
- 2.1 × Earth
- Mass
- 9.1 × Earth
- Density
- 5.2 g/cm³
- Equilibrium temperature
- 279 K
- Starlight received
- 1.013 × Earth
- Orbital period
- 289.9 days
- Average distance from its star
- 0.812 AU
Star
- Host star
- Kepler-22
- Spectral class
- G — sun-like
- Surface temperature
- 5,596 K
- Radius
- 0.869 × Sun
- Mass
- 0.857 × Sun
- Age
- 7 billion years
System
- Distance from Earth
- 634.8 light-years (194.6 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.