The WASP-4 system contains 1 exoplanet. It is located 871.51 light years away from the solar system.
| Mass | 0.86 solar masses |
| Radius | 0.89 solar radiae |
| Temperature | 5400 kelvin |
| Stellar Metallicity | -0.07 decimal exponent |
| Age | 7 billion years |
At more than 50 Earth masses, WASP-4 b is a gas giant, a planet whose mass is mostly made up of hydrogen and helium, like Jupiter and Saturn.
| Mass | 376.946 Earth masses |
| Density | 0.612 grams per cubic centimeter |
| Radius | 14.807 Earth radiae |
| Semi-major Axis | 0.0226 AU |
| Eccentricity | 0 |
| Orbital Period | 1.338 days |
| Discovery Method | Transit |
| Discovery Facility | SuperWASP |
| Discovery Telescope | Canon 200mm f/1.8L |
| Discovery Instrument | iKon-L CCD Camera |
| Discovery Date | 2008-03 |
| Reference | Wilson et al. 2008 |