The HD 217850 system contains 1 exoplanet. It is located 214.60 light years away from the solar system.
| Mass | 1.03 solar masses |
| Radius | 1.21 solar radiae |
| Temperature | 5544 kelvin |
| Stellar Metallicity | 0.26 decimal exponent |
| Age | 7.59 billion years |
At more than 50 Earth masses, HD 217850 b is a gas giant, a planet whose mass is mostly made up of hydrogen and helium, like Jupiter and Saturn.
| Mass | 6865.128 Earth masses |
| Density | 21.300 grams per cubic centimeter |
| Radius | 12.100 Earth radiae |
| Semi-major Axis | 4.56 AU |
| Eccentricity | 0.7621 |
| Orbital Period | 3501.300 days |
| Discovery Method | Radial Velocity |
| Discovery Facility | W. M. Keck Observatory |
| Discovery Telescope | 10 m Keck I Telescope |
| Discovery Instrument | HIRES Spectrometer |
| Discovery Date | 2018-11 |
| Reference | Ment et al. 2018 |