The HAT-P-12 system contains 1 exoplanet. It is located 465.59 light years away from the solar system.
| Mass | 0.73 solar masses |
| Radius | 0.7 solar radiae |
| Temperature | 4650 kelvin |
| Stellar Metallicity | -0.29 decimal exponent |
| Age | 2.5 billion years |
At more than 50 Earth masses, HAT-P-12 b is a gas giant, a planet whose mass is mostly made up of hydrogen and helium, like Jupiter and Saturn.
| Mass | 67.059 Earth masses |
| Density | 0.319 grams per cubic centimeter |
| Radius | 10.749 Earth radiae |
| Semi-major Axis | 0.0384 AU |
| Eccentricity | 0 |
| Orbital Period | 3.213 days |
| Discovery Method | Transit |
| Discovery Facility | HATNet |
| Discovery Telescope | Canon 200mm f/1.8L |
| Discovery Instrument | 2K CCD Sensor |
| Discovery Date | 2009-11 |
| Reference | Hartman et al. 2009 |