The HAT-P-57 system contains 1 exoplanet. It is located 912.78 light years away from the solar system.
| Mass | 2.77 solar masses |
| Radius | 1.85 solar radiae |
| Temperature | 6330 kelvin |
| Stellar Metallicity | -0.25 decimal exponent |
| Age | 1 billion years |
At more than 50 Earth masses, HAT-P-57 b is a gas giant, a planet whose mass is mostly made up of hydrogen and helium, like Jupiter and Saturn.
| Mass | 448.140 Earth masses |
| Density | 0.332 grams per cubic centimeter |
| Radius | 19.504 Earth radiae |
| Semi-major Axis | 0.0406 AU |
| Eccentricity | 0 |
| Orbital Period | 2.465 days |
| Discovery Method | Transit |
| Discovery Facility | HATNet |
| Discovery Telescope | Multiple Telescopes |
| Discovery Instrument | Multiple Instruments |
| Discovery Date | 2015-12 |
| Reference | Hartman et al. 2015 |