WASP-39 b
A confirmed exoplanet orbiting WASP-39.
Compared with Earth
- Size
- About 14 times Earth's width.
- Mass
- About 89 times Earth's mass.
- Temperature
- About 893 °C (1,639 °F) from starlight alone, against -18 °C (-1 °F) for Earth measured the same way.
- Year
- A year here lasts about 4.1 Earth days.
Planet
- Radius
- 14.34 × Earth
- Mass
- 89.31 × Earth
- Density
- 0.167 g/cm³
- Equilibrium temperature
- 1,166 K
- Starlight received
- Unknown
- Orbital period
- 4.055 days
- Average distance from its star
- 0.04828 AU
Star
- Host star
- WASP-39
- Spectral class
- G — sun-like
- Surface temperature
- 5,485 K
- Radius
- 0.939 × Sun
- Mass
- 0.913 × Sun
- Age
- 8.5 billion years
System
- Distance from Earth
- 697.9 light-years (214 parsecs)
- Stars in system
- 1
- Known planets
- 1
Discovery
- Year
- 2011
- Method
- Transit
- Facility
- SuperWASP
Data from the NASA Exoplanet Archive, synced October 14, 2026.