The HAT-P-28 system contains 1 exoplanet. It is located 1308.93 light years away from the solar system.
| Mass | 1.03 solar masses |
| Radius | 1.1 solar radiae |
| Temperature | 5680 kelvin |
| Stellar Metallicity | 0.12 decimal exponent |
| Age | 6.1 billion years |
At more than 50 Earth masses, HAT-P-28 b is a gas giant, a planet whose mass is mostly made up of hydrogen and helium, like Jupiter and Saturn.
| Mass | 198.953 Earth masses |
| Density | 0.440 grams per cubic centimeter |
| Radius | 13.585 Earth radiae |
| Semi-major Axis | 0.0434 AU |
| Eccentricity | 0.051 |
| Orbital Period | 3.257 days |
| Discovery Method | Transit |
| Discovery Facility | HATNet |
| Discovery Telescope | Canon 200mm f/1.8L |
| Discovery Instrument | 2K CCD Sensor |
| Discovery Date | 2011-06 |
| Reference | Buchhave et al. 2011 |