K2-239 is a star with 0.4 times the mass of the Sun, and 0.36 times its radius. It is located 101.39 light years away from the solar system.
K2-239 is known to have 3 exoplanets in orbit around it.
K2-239 b was discovered by the K2 observatory, in 2018-10, using the transit method. Its semi-major axis is 0.04 astronomical units, as compared to Earth's which is 1 astronomical unit. The mass of K2-239 b is 1.367 times the mass of Earth. The radius of K2-239 b is 1.100 that of Earth. At less than 1.5 Earth masses, K2-239 b is a regular terrestrial planet, much like the terrestrial planets we find in our solar system, namely Mercury, Venus, Earth and Mars.
K2-239 c was discovered by the K2 observatory, in 2018-10, using the transit method. Its semi-major axis is 0.06 astronomical units, as compared to Earth's which is 1 astronomical unit. The mass of K2-239 c is 0.973 times the mass of Earth. The radius of K2-239 c is 1.000 that of Earth. At less than 1.5 Earth masses, K2-239 c is a regular terrestrial planet, much like the terrestrial planets we find in our solar system, namely Mercury, Venus, Earth and Mars.
K2-239 d was discovered by the K2 observatory, in 2018-10, using the transit method. Its semi-major axis is 0.07 astronomical units, as compared to Earth's which is 1 astronomical unit. The mass of K2-239 d is 1.367 times the mass of Earth. The radius of K2-239 d is 1.100 that of Earth. At less than 1.5 Earth masses, K2-239 d is a regular terrestrial planet, much like the terrestrial planets we find in our solar system, namely Mercury, Venus, Earth and Mars.