GJ 3021 is a star with 0.9 times the mass of the Sun, and 0.9 times its radius. It is located 57.26 light years away from the solar system.
GJ 3021 is known to have 1 exoplanets in orbit around it.
GJ 3021 b was discovered by the La Silla Observatory observatory, in 2001-08, using the radial velocity method. Its semi-major axis is 0.49 astronomical units, as compared to Earth's which is 1 astronomical unit. The mass of GJ 3021 b is 1071.660 times the mass of Earth. The radius of GJ 3021 b is 13.100 that of Earth. At more than 50 Earth masses, GJ 3021 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.