The HD 217786 system contains 1 exoplanet. It is located 180.97 light years away from the solar system.
| Mass | 1.02 solar masses |
| Radius | 1.27 solar radiae |
| Temperature | 5966 kelvin |
| Stellar Metallicity | -0.135 decimal exponent |
| Age | 7.6 billion years |
At more than 50 Earth masses, HD 217786 b is a gas giant, a planet whose mass is mostly made up of hydrogen and helium, like Jupiter and Saturn.
| Mass | 4131.620 Earth masses |
| Density | 12.200 grams per cubic centimeter |
| Radius | 12.300 Earth radiae |
| Semi-major Axis | 2.38 AU |
| Eccentricity | 0.4 |
| Orbital Period | 1319.000 days |
| Discovery Method | Radial Velocity |
| Discovery Facility | La Silla Observatory |
| Discovery Telescope | 3.6 m ESO Telescope |
| Discovery Instrument | HARPS Spectrograph |
| Discovery Date | 2011-03 |
| Reference | Moutou et al. 2011 |