Kepler-428 b
A confirmed exoplanet orbiting Kepler-428.
Compared with Earth
- Size
- About 12 times Earth's width.
- Mass
- About 404 times Earth's mass.
- Temperature
- About 797 °C (1,466 °F) from starlight alone, against -18 °C (-1 °F) for Earth measured the same way.
- Year
- A year here lasts about 3.5 Earth days.
Planet
- Radius
- 12.11 × Earth
- Mass
- 403.6 × Earth
- Density
- 1.02 g/cm³
- Equilibrium temperature
- 1,070 K
- Starlight received
- Unknown
- Orbital period
- 3.526 days
- Average distance from its star
- 0.0433 AU
Star
- Host star
- Kepler-428
- Spectral class
- K — orange dwarf
- Surface temperature
- 5,150 K
- Radius
- 0.8 × Sun
- Mass
- 0.87 × Sun
- Age
- 5 billion years
System
- Distance from Earth
- 2,238 light-years (686.3 parsecs)
- Stars in system
- 1
- Known planets
- 1
Discovery
- Year
- 2014
- Method
- Transit
- Facility
- Kepler
Data from the NASA Exoplanet Archive, synced October 14, 2026.