HAT-P-66 b
A confirmed exoplanet orbiting HAT-P-66.
Compared with Earth
- Size
- About 18 times Earth's width.
- Mass
- About 249 times Earth's mass.
- Temperature
- About 1,623 °C (2,953 °F) from starlight alone, against -18 °C (-1 °F) for Earth measured the same way.
- Year
- A year here lasts about 3 Earth days.
Planet
- Radius
- 17.82 × Earth
- Mass
- 248.9 × Earth
- Density
- 0.242 g/cm³
- Equilibrium temperature
- 1,896 K
- Starlight received
- Unknown
- Orbital period
- 2.972 days
- Average distance from its star
- 0.04363 AU
Star
- Host star
- HAT-P-66
- Spectral class
- F — yellow-white
- Surface temperature
- 6,002 K
- Radius
- 1.881 × Sun
- Mass
- 1.255 × Sun
- Age
- 4.66 billion years
System
- Distance from Earth
- 3,051 light-years (935.5 parsecs)
- Stars in system
- 1
- Known planets
- 1
Discovery
- Year
- 2016
- Method
- Transit
- Facility
- HATNet
Data from the NASA Exoplanet Archive, synced October 14, 2026.