The HD 111591 system contains 1 exoplanet. It is located 372.36 light years away from the solar system.
| Mass | 1.94 solar masses |
| Radius | 8.03 solar radiae |
| Temperature | 4884 kelvin |
| Stellar Metallicity | 0.07 decimal exponent |
| Age | 1.41 billion years |
At more than 50 Earth masses, HD 111591 b is a gas giant, a planet whose mass is mostly made up of hydrogen and helium, like Jupiter and Saturn.
| Mass | 1398.452 Earth masses |
| Density | 3.580 grams per cubic centimeter |
| Radius | 12.900 Earth radiae |
| Semi-major Axis | 2.5 AU |
| Eccentricity | 0.26 |
| Orbital Period | 1056.400 days |
| Discovery Method | Radial Velocity |
| Discovery Facility | Multiple Observatories |
| Discovery Telescope | Multiple Telescopes |
| Discovery Instrument | Multiple Instruments |
| Discovery Date | 2018-02 |
| Reference | Jeong et al. 2018 |