K2-57 b
A confirmed exoplanet orbiting K2-57.
Compared with Earth
- Size
- About 2.3 times Earth's width.
- Temperature
- About 363 °C (685 °F) from starlight alone, against -18 °C (-1 °F) for Earth measured the same way.
- Year
- A year here lasts about 9 Earth days.
Planet
- Radius
- 2.309 × Earth
- Mass
- Unknown
- Density
- Unknown
- Equilibrium temperature
- 635.8 K
- Starlight received
- Unknown
- Orbital period
- 9.007 days
- Average distance from its star
- 0.0752 AU
Star
- Host star
- K2-57
- Spectral class
- K — orange dwarf
- Surface temperature
- 4,413 K
- Radius
- 0.671 × Sun
- Mass
- 0.699 × Sun
- Age
- 6.8 billion years
System
- Distance from Earth
- 861.7 light-years (264.2 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.