K2-12 b
A confirmed exoplanet orbiting K2-12.
Compared with Earth
- Size
- About 2.4 times Earth's width.
- Mass
- About 5.2 times Earth's mass.
- Temperature
- About 753 °C (1,387 °F) from starlight alone, against -18 °C (-1 °F) for Earth measured the same way.
- Starlight
- About 185 times the starlight Earth gets from the Sun.
- Year
- A year here lasts about 8.3 Earth days.
Planet
- Radius
- 2.44 × Earth
- Mass
- 5.2 × Earth
- Density
- 1.6 g/cm³
- Equilibrium temperature
- 1,026 K
- Starlight received
- 185 × Earth
- Orbital period
- 8.282 days
- Average distance from its star
- 0.0792 AU
Star
- Host star
- K2-12
- Spectral class
- G — sun-like
- Surface temperature
- 5,672 K
- Radius
- 1.117 × Sun
- Mass
- 0.965 × Sun
- Age
- 8.9 billion years
System
- Distance from Earth
- 1,065 light-years (326.4 parsecs)
- Stars in system
- 1
- Known planets
- 1
Discovery
- Year
- 2015
- Method
- Transit
- Facility
- K2
Data from the NASA Exoplanet Archive, synced October 14, 2026.