alf Ari is a star with 1.5 times the mass of the Sun, and 13.9 times its radius. It is located 65.92 light years away from the solar system.
alf Ari is known to have 1 exoplanets in orbit around it.
alf Ari b was discovered by the Bohyunsan Optical Astronomical Observatory observatory, in 2011-05, using the radial velocity method. Its semi-major axis is 1.20 astronomical units, as compared to Earth's which is 1 astronomical unit. The mass of alf Ari b is 572.400 times the mass of Earth. The radius of alf Ari b is 13.400 that of Earth. 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 in our solar system.