K2-31 is a star with 0.91 times the mass of the Sun, and 0.78 times its radius. It is located 360.49 light years away from the solar system.
K2-31 is known to have 1 exoplanets in orbit around it.
K2-31 b was discovered by the K2 observatory, in 2016-06, using the transit method. Its semi-major axis is 0.02 astronomical units, as compared to Earth's which is 1 astronomical unit. The mass of K2-31 b is 564.132 times the mass of Earth. The radius of K2-31 b is 11.882 that of Earth. At more than 50 Earth masses, K2-31 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.