WASP-18 b
A confirmed exoplanet orbiting WASP-18.
Compared with Earth
- Size
- About 14 times Earth's width.
- Mass
- About 3,242 times Earth's mass.
- Temperature
- About 2,156 °C (3,913 °F) from starlight alone, against -18 °C (-1 °F) for Earth measured the same way.
- Starlight
- About 5,805 times the starlight Earth gets from the Sun.
- Year
- A year here lasts about 23 hours.
Planet
- Radius
- 13.9 × Earth
- Mass
- 3,242 × Earth
- Density
- 6.6 g/cm³
- Equilibrium temperature
- 2,429 K
- Starlight received
- 5,805 × Earth
- Orbital period
- 0.9415 days
- Average distance from its star
- 0.02024 AU
Star
- Host star
- WASP-18
- Spectral class
- F — yellow-white
- Surface temperature
- 6,432 K
- Radius
- 1.319 × Sun
- Mass
- 1.294 × Sun
- Age
- 1.57 billion years
System
- Distance from Earth
- 402.7 light-years (123.5 parsecs)
- Stars in system
- 2
- Known planets
- 1
Discovery
- Year
- 2009
- Method
- Transit
- Facility
- SuperWASP
Data from the NASA Exoplanet Archive, synced October 14, 2026.