Kepler-78 b
A confirmed exoplanet orbiting Kepler-78.
Compared with Earth
- Size
- About 1.2 times Earth's width.
- Mass
- About 1.7 times Earth's mass.
- Temperature
- About 1,950 °C (3,542 °F) from starlight alone, against -18 °C (-1 °F) for Earth measured the same way.
- Starlight
- About 4,070 times the starlight Earth gets from the Sun.
- Year
- A year here lasts about 8.5 hours.
Planet
- Radius
- 1.201 × Earth
- Mass
- 1.68 × Earth
- Density
- 5.33 g/cm³
- Equilibrium temperature
- 2,223 K
- Starlight received
- 4,070 × Earth
- Orbital period
- 0.355 days
- Average distance from its star
- 0.00901 AU
Star
- Host star
- Kepler-78
- Spectral class
- K — orange dwarf
- Surface temperature
- 5,058 K
- Radius
- 0.7475 × Sun
- Mass
- 0.779 × Sun
- Age
- Unknown
System
- Distance from Earth
- 405.7 light-years (124.4 parsecs)
- Stars in system
- 2
- Known planets
- 1
Discovery
- Year
- 2013
- Method
- Transit
- Facility
- Kepler
Data from the NASA Exoplanet Archive, synced October 14, 2026.