K2-66 b
A confirmed exoplanet orbiting K2-66.
Compared with Earth
- Size
- About 2.5 times Earth's width.
- Mass
- About 21 times Earth's mass.
- Temperature
- About 1,099 °C (2,010 °F) from starlight alone, against -18 °C (-1 °F) for Earth measured the same way.
- Starlight
- About 840 times the starlight Earth gets from the Sun.
- Year
- A year here lasts about 5.1 Earth days.
Planet
- Radius
- 2.49 × Earth
- Mass
- 21.3 × Earth
- Density
- 7.8 g/cm³
- Equilibrium temperature
- 1,372 K
- Starlight received
- 840 × Earth
- Orbital period
- 5.07 days
- Average distance from its star
- 0.05983 AU
Star
- Host star
- K2-66
- Spectral class
- G — sun-like
- Surface temperature
- 5,887 K
- Radius
- 1.67 × Sun
- Mass
- 1.11 × Sun
- Age
- Unknown
System
- Distance from Earth
- 1,676 light-years (513.9 parsecs)
- Stars in system
- 1
- Known planets
- 1
Discovery
- Year
- 2016
- Method
- Transit
- Facility
- K2
Data from the NASA Exoplanet Archive, synced October 14, 2026.