The alf Ari system contains 1 exoplanet. It is located 65.92 light years away from the solar system.
| Mass | 1.5 solar masses |
| Radius | 13.9 solar radiae |
| Temperature | 4553 kelvin |
| Stellar Metallicity | -0.16 decimal exponent |
| Age | - billion years |
At more than 50 Earth masses, alf Ari b is a gas giant, a planet whose mass is mostly made up of hydrogen and helium, like Jupiter and Saturn.
| Mass | 572.070 Earth masses |
| Density | 1.310 grams per cubic centimeter |
| Radius | 13.400 Earth radiae |
| Semi-major Axis | 1.2 AU |
| Eccentricity | 0.25 |
| Orbital Period | 380.800 days |
| Discovery Method | Radial Velocity |
| Discovery Facility | Bohyunsan Optical Astronomical Observatory |
| Discovery Telescope | 1.8 m Telescope |
| Discovery Instrument | BOES Echelle Spectrograph |
| Discovery Date | 2011-05 |
| Reference | Lee et al. 2011 |