K2-258 b
A confirmed exoplanet orbiting K2-258.
Compared with Earth
- Size
- About 3 times Earth's width.
- Temperature
- About 558 °C (1,036 °F) from starlight alone, against -18 °C (-1 °F) for Earth measured the same way.
- Year
- A year here lasts about 19 Earth days.
Planet
- Radius
- 3 × Earth
- Mass
- Unknown
- Density
- Unknown
- Equilibrium temperature
- 831 K
- Starlight received
- Unknown
- Orbital period
- 19.09 days
- Average distance from its star
- 0.149 AU
Star
- Host star
- K2-258
- Spectral class
- F — yellow-white
- Surface temperature
- 6,351 K
- Radius
- 1.31 × Sun
- Mass
- 1.21 × Sun
- Age
- Unknown
System
- Distance from Earth
- 2,159 light-years (661.9 parsecs)
- Stars in system
- 1
- Known planets
- 1
Discovery
- Year
- 2018
- Method
- Transit
- Facility
- K2
Data from the NASA Exoplanet Archive, synced October 14, 2026.