The WASP-18 System
WASP-18 is a planetary system in the constellation Phoenix hosting 2 confirmed exoplanets around 2 stars, about 403 light-years from Earth.
Size Comparison: The Planets of WASP-18
Planets without a measured radius are not shown.
Star WASP-18 and Its Habitable Zone
WASP-18
- Surface temperature
- 6,432 K (Sun: 5,772 K)
- Mass
- 1.29 M☉
- Radius
- 1.32 R☉
- Luminosity
- 2.6800 L☉
- Age
- 1.6 billion years (Sun: 4.6)
Habitable zone of WASP-18: 1.181–2.744 AU (conservative: 1.496–2.602 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
See the full interactive habitable-zone view in the Exoplanet Explorer app ›
All 2 Planets in the WASP-18 System
Discovery History
The first planet found here, WASP-18 b, was discovered in 2009 using the transit method. The most recent addition, WASP-18 c, followed in 2019.
Frequently Asked Questions About WASP-18
How many planets does WASP-18 have?
WASP-18 has 2 confirmed exoplanets distributed around its 2 stars. More may await discovery.
Are any planets in the WASP-18 system habitable?
None of the known planets in WASP-18 orbit within the star's habitable zone.
How far away is WASP-18?
WASP-18 is about 403 light-years from Earth in the constellation Phoenix.
Explore the WASP-18 system in the app
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