K2-288 B is a star with 0.33 times the mass of the Sun, and 0.32 times its radius. It is located 214.00 light years away from the solar system and is estimated to be 1 billion years old, as compared to the Sun which is roughly 4.6 billion years old.
K2-288 B is known to have 1 exoplanets in orbit around it.
K2-288 B b was discovered by the K2 observatory, in 2019-01, using the transit method. Its semi-major axis is 0.16 astronomical units, as compared to Earth's which is 1 astronomical unit. The mass of K2-288 B b is 4.261 times the mass of Earth. The radius of K2-288 B b is 1.900 that of Earth. With a mass below 5 Earth masses, a density of 3.42, and a semi-major axis of 0.164 astronomical units, K2-288 B b could, potentially, be an ocean world - a planet with no dry land.