HAT-P-42 b
A confirmed exoplanet orbiting HAT-P-42.
Compared with Earth
- Size
- About 14 times Earth's width.
- Mass
- About 332 times Earth's mass.
- Temperature
- About 1,155 °C (2,111 °F) from starlight alone, against -18 °C (-1 °F) for Earth measured the same way.
- Year
- A year here lasts about 4.6 Earth days.
Planet
- Radius
- 14.35 × Earth
- Mass
- 331.8 × Earth
- Density
- 0.61 g/cm³
- Equilibrium temperature
- 1,428 K
- Starlight received
- Unknown
- Orbital period
- 4.642 days
- Average distance from its star
- 0.0575 AU
Star
- Host star
- HAT-P-42
- Spectral class
- G — sun-like
- Surface temperature
- 5,743 K
- Radius
- 1.53 × Sun
- Mass
- 1.178 × Sun
- Age
- 5.2 billion years
System
- Distance from Earth
- 1,322 light-years (405.2 parsecs)
- Stars in system
- 1
- Known planets
- 1
Discovery
- Year
- 2012
- Method
- Transit
- Facility
- HATNet
Data from the NASA Exoplanet Archive, synced October 14, 2026.