HAT-P-20 b
A confirmed exoplanet orbiting HAT-P-20.
Compared with Earth
- Size
- About 9.7 times Earth's width.
- Mass
- About 2,303 times Earth's mass.
- Temperature
- About 697 °C (1,286 °F) from starlight alone, against -18 °C (-1 °F) for Earth measured the same way.
- Year
- A year here lasts about 2.9 Earth days.
Planet
- Radius
- 9.718 × Earth
- Mass
- 2,303 × Earth
- Density
- 13.78 g/cm³
- Equilibrium temperature
- 970 K
- Starlight received
- Unknown
- Orbital period
- 2.875 days
- Average distance from its star
- 0.0361 AU
Star
- Host star
- HAT-P-20
- Spectral class
- K — orange dwarf
- Surface temperature
- 4,595 K
- Radius
- 0.694 × Sun
- Mass
- 0.756 × Sun
- Age
- 6.7 billion years
System
- Distance from Earth
- 231.7 light-years (71.04 parsecs)
- Stars in system
- 1
- Known planets
- 1
Discovery
- Year
- 2010
- Method
- Transit
- Facility
- HATNet
Data from the NASA Exoplanet Archive, synced October 14, 2026.