The 51 Eri system contains 1 exoplanet. It is located 97.06 light years away from the solar system.
| Mass | 1.75 solar masses |
| Radius | 1.49 solar radiae |
| Temperature | 7295 kelvin |
| Stellar Metallicity | -0.027 decimal exponent |
| Age | 0.02 billion years |
At more than 50 Earth masses, 51 Eri b is a gas giant, a planet whose mass is mostly made up of hydrogen and helium, like Jupiter and Saturn.
| Mass | 635.660 Earth masses |
| Density | 1.450 grams per cubic centimeter |
| Radius | 13.400 Earth radiae |
| Semi-major Axis | 13.2 AU |
| Eccentricity | 0.45 |
| Orbital Period | 11688.000 days |
| Discovery Method | Imaging |
| Discovery Facility | Gemini Observatory |
| Discovery Telescope | 8.19 m Gemini South Telescope |
| Discovery Instrument | Gemini Planet Imager |
| Discovery Date | 2015-00 |
| Reference | Macintosh et al. 2015 |