Kepler-257 d
A confirmed exoplanet orbiting Kepler-257.
Compared with Earth
- Size
- About 5 times Earth's width.
- Year
- A year here lasts about 25 Earth days.
Planet
- Radius
- 4.95 × Earth
- Mass
- Unknown
- Density
- Unknown
- Equilibrium temperature
- Unknown
- Starlight received
- Unknown
- Orbital period
- 24.66 days
- Average distance from its star
- 0.16 AU
Star
- Host star
- Kepler-257
- Spectral class
- K — orange dwarf
- Surface temperature
- 5,180 K
- Radius
- 1.037 × Sun
- Mass
- Unknown
- Age
- Unknown
System
- Distance from Earth
- 2,545 light-years (780.3 parsecs)
- Stars in system
- 1
- Known planets
- 3
Discovery
- Year
- 2014
- Method
- Transit
- Facility
- Kepler
Data from the NASA Exoplanet Archive, synced October 14, 2026.