The HD 231701 system contains 1 exoplanet. It is located 355.11 light years away from the solar system.
| Mass | 1.21 solar masses |
| Radius | 1.53 solar radiae |
| Temperature | 6101 kelvin |
| Stellar Metallicity | 0.05 decimal exponent |
| Age | 3.43 billion years |
At more than 50 Earth masses, HD 231701 b is a gas giant, a planet whose mass is mostly made up of hydrogen and helium, like Jupiter and Saturn.
| Mass | 359.148 Earth masses |
| Density | 0.768 grams per cubic centimeter |
| Radius | 13.700 Earth radiae |
| Semi-major Axis | 0.567 AU |
| Eccentricity | 0.13 |
| Orbital Period | 141.630 days |
| Discovery Method | Radial Velocity |
| Discovery Facility | W. M. Keck Observatory |
| Discovery Telescope | 10 m Keck I Telescope |
| Discovery Instrument | HIRES Spectrometer |
| Discovery Date | 2007-11 |
| Reference | Fischer et al. 2007 |