The HAT-P-2 system contains 1 exoplanet. It is located 416.74 light years away from the solar system.
| Mass | 1.33 solar masses |
| Radius | 1.39 solar radiae |
| Temperature | 6380 kelvin |
| Stellar Metallicity | 0.18 decimal exponent |
| Age | 1.44 billion years |
At more than 50 Earth masses, HAT-P-2 b is a gas giant, a planet whose mass is mostly made up of hydrogen and helium, like Jupiter and Saturn.
| Mass | 2765.121 Earth masses |
| Density | 7.290 grams per cubic centimeter |
| Radius | 10.660 Earth radiae |
| Semi-major Axis | 0.06814 AU |
| Eccentricity | 0.5172 |
| Orbital Period | 5.634 days |
| Discovery Method | Transit |
| Discovery Facility | HATNet |
| Discovery Telescope | Canon 200mm f/1.8L |
| Discovery Instrument | 2K CCD Sensor |
| Discovery Date | 2007-11 |
| Reference | Bakos et al. 2007 |