HAT-P-55 b
A confirmed exoplanet orbiting HAT-P-55.
Compared with Earth
- Size
- About 15 times Earth's width.
- Mass
- About 189 times Earth's mass.
- Temperature
- About 1,094 °C (2,001 °F) from starlight alone, against -18 °C (-1 °F) for Earth measured the same way.
- Starlight
- About 583 times the starlight Earth gets from the Sun.
- Year
- A year here lasts about 3.6 Earth days.
Planet
- Radius
- 14.84 × Earth
- Mass
- 189.4 × Earth
- Density
- 0.318 g/cm³
- Equilibrium temperature
- 1,367 K
- Starlight received
- 583 × Earth
- Orbital period
- 3.585 days
- Average distance from its star
- 0.04628 AU
Star
- Host star
- HAT-P-55
- Spectral class
- G — sun-like
- Surface temperature
- 5,804 K
- Radius
- 1.105 × Sun
- Mass
- 1.028 × Sun
- Age
- 5.3 billion years
System
- Distance from Earth
- 1,668 light-years (511.4 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.