K2-126 is a star with 0.69 times the mass of the Sun, and 0.65 times its radius. It is located 335.79 light years away from the solar system.
K2-126 is known to have 1 exoplanets in orbit around it.
K2-126 b was discovered by the K2 observatory, in 2017-11, 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 K2-126 b is 4.547 times the mass of Earth. The radius of K2-126 b is 1.970 that of Earth. With a mass below 5 Earth masses, a density of 3.26, and a semi-major axis of 0.0656 astronomical units, K2-126 b could, potentially, be an ocean world - a planet with no dry land.