The HAT-P-11 system contains 2 exoplanets. It is located 123.17 light years away from the solar system.
| Mass | 0.81 solar masses |
| Radius | 0.68 solar radiae |
| Temperature | 4780 kelvin |
| Stellar Metallicity | 0.31 decimal exponent |
| Age | 6.5 billion years |
At more than 10 Earth masses, HAT-P-11 b is an ice giant, a planet that is made up mostly of volatiles like water, amonia and methane, and enveloped by a dense hydrogen and helium atmosphere, much like Uranus and Neptune.
| Mass | 26.698 Earth masses |
| Density | 1.680 grams per cubic centimeter |
| Radius | 4.360 Earth radiae |
| Semi-major Axis | 0.05254 AU |
| Eccentricity | 0.218 |
| Orbital Period | 4.888 days |
| Discovery Method | Transit |
| Discovery Facility | HATNet |
| Discovery Telescope | Canon 200mm f/1.8L |
| Discovery Instrument | 2K CCD Sensor |
| Discovery Date | 2010-02 |
| Reference | Bakos et al. 2010 |
At more than 50 Earth masses, HAT-P-11 c is a gas giant, a planet whose mass is mostly made up of hydrogen and helium, like Jupiter and Saturn.
| Mass | 731.009 Earth masses |
| Density | 1.710 grams per cubic centimeter |
| Radius | 13.300 Earth radiae |
| Semi-major Axis | 4.13 AU |
| Eccentricity | 0.601 |
| Orbital Period | 3407.000 days |
| Discovery Method | Radial Velocity |
| Discovery Facility | W. M. Keck Observatory |
| Discovery Telescope | 10 m Keck I Telescope |
| Discovery Instrument | HIRES Spectrometer |
| Discovery Date | 2018-06 |
| Reference | Yee et al. 2018 |