HAT-P-51 b
A confirmed exoplanet orbiting HAT-P-51.
Compared with Earth
- Size
- About 14 times Earth's width.
- Mass
- About 98 times Earth's mass.
- Temperature
- About 895 °C (1,643 °F) from starlight alone, against -18 °C (-1 °F) for Earth measured the same way.
- Starlight
- About 310 times the starlight Earth gets from the Sun.
- Year
- A year here lasts about 4.2 Earth days.
Planet
- Radius
- 13.51 × Earth
- Mass
- 97.57 × Earth
- Density
- 0.218 g/cm³
- Equilibrium temperature
- 1,168 K
- Starlight received
- 310 × Earth
- Orbital period
- 4.218 days
- Average distance from its star
- 0.05042 AU
Star
- Host star
- HAT-P-51
- Spectral class
- G — sun-like
- Surface temperature
- 5,453 K
- Radius
- 0.995 × Sun
- Mass
- 0.961 × Sun
- Age
- 8.1 billion years
System
- Distance from Earth
- 1,435 light-years (440.1 parsecs)
- Stars in system
- 1
- Known planets
- 1
Discovery
- Year
- 2015
- Method
- Transit
- Facility
- HATNet
Data from the NASA Exoplanet Archive, synced October 14, 2026.