The HAT-P-20 system contains 1 exoplanet. It is located 231.69 light years away from the solar system.
| Mass | 0.76 solar masses |
| Radius | 0.69 solar radiae |
| Temperature | 4595 kelvin |
| Stellar Metallicity | 0.35 decimal exponent |
| Age | 6.7 billion years |
At more than 50 Earth masses, HAT-P-20 b is a gas giant, a planet whose mass is mostly made up of hydrogen and helium, like Jupiter and Saturn.
| Mass | 2302.899 Earth masses |
| Density | 13.780 grams per cubic centimeter |
| Radius | 9.718 Earth radiae |
| Semi-major Axis | 0.0361 AU |
| Eccentricity | 0.015 |
| Orbital Period | 2.875 days |
| Discovery Method | Transit |
| Discovery Facility | HATNet |
| Discovery Telescope | Canon 200mm f/1.8L |
| Discovery Instrument | 2K CCD Sensor |
| Discovery Date | 2011-12 |
| Reference | Bakos et al. 2010 |