The WASP-18 system contains 2 exoplanets. It is located 402.75 light years away from the solar system.
| Mass | 1.29 solar masses |
| Radius | 1.32 solar radiae |
| Temperature | 6432 kelvin |
| Stellar Metallicity | 0.107 decimal exponent |
| Age | 1.57 billion years |
At more than 50 Earth masses, WASP-18 b is a gas giant, a planet whose mass is mostly made up of hydrogen and helium, like Jupiter and Saturn.
| Mass | 3241.850 Earth masses |
| Density | 6.600 grams per cubic centimeter |
| Radius | 13.899 Earth radiae |
| Semi-major Axis | 0.02024 AU |
| Eccentricity | 0.0051 |
| Orbital Period | 0.941 days |
| Discovery Method | Transit |
| Discovery Facility | SuperWASP |
| Discovery Telescope | Canon 200mm f/1.8L |
| Discovery Instrument | iKon-L CCD Camera |
| Discovery Date | 2009-08 |
| Reference | Hellier et al. 2009 |
At more than 50 Earth masses, WASP-18 c is a gas giant, a planet whose mass is mostly made up of hydrogen and helium, like Jupiter and Saturn.
| Mass | 55.200 Earth masses |
| Density | 0.480 grams per cubic centimeter |
| Radius | 8.580 Earth radiae |
| Semi-major Axis | 0.035 AU |
| Eccentricity | 0.015 |
| Orbital Period | 2.156 days |
| Discovery Method | Transit Timing Variations |
| Discovery Facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery Telescope | 0.1 m TESS Telescope |
| Discovery Instrument | TESS CCD Array |
| Discovery Date | 2019-12 |
| Reference | Pearson 2019 |