HAT-P-4 b
A confirmed exoplanet orbiting HAT-P-4.
Compared with Earth
- Size
- About 14 times Earth's width.
- Mass
- About 213 times Earth's mass.
- Temperature
- About 1,413 °C (2,575 °F) from starlight alone, against -18 °C (-1 °F) for Earth measured the same way.
- Year
- A year here lasts about 3.1 Earth days.
Planet
- Radius
- 14.28 × Earth
- Mass
- 213.3 × Earth
- Density
- 0.403 g/cm³
- Equilibrium temperature
- 1,686 K
- Starlight received
- Unknown
- Orbital period
- 3.057 days
- Average distance from its star
- 0.04438 AU
Star
- Host star
- HAT-P-4
- Spectral class
- G — sun-like
- Surface temperature
- 5,860 K
- Radius
- 1.596 × Sun
- Mass
- 1.248 × Sun
- Age
- Unknown
System
- Distance from Earth
- 1,045 light-years (320.5 parsecs)
- Stars in system
- 2
- Known planets
- 1
Discovery
- Year
- 2007
- Method
- Transit
- Facility
- HATNet
Data from the NASA Exoplanet Archive, synced October 14, 2026.