K2-37 is a star with 0.9 times the mass of the Sun, and 0.85 times its radius. It is located 586.89 light years away from the solar system.
K2-37 is known to have 3 exoplanets in orbit around it.
K2-37 b was discovered by the K2 observatory, in 2016-08, using the transit method. Its semi-major axis is 0.05 astronomical units, as compared to Earth's which is 1 astronomical unit. The mass of K2-37 b is 3.212 times the mass of Earth. The radius of K2-37 b is 1.610 that of Earth. At 3.212 Earth masses, K2-37 b is a so called Super Earth. Super Earths could be terrestrial worlds like Earth, but they could also be ocean worlds or terrestrial worlds wrapped in a substantial atmosphere, in which case some refer to them as Mini Neptunes. No Super Earths are known to exist in our solar system, but if it exists, the so-called Planet Nine could very well be a super Earth, as it is hypothesized to have a mass between five and ten Earth masses.
K2-37 c was discovered by the K2 observatory, in 2016-08, 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 K2-37 c is 8.014 times the mass of Earth. The radius of K2-37 c is 2.750 that of Earth. At more than 10 Earth masses, K2-37 c is an ice giant, a planet that is made up mostly of volatiles like water, amonia and methane, and enveloped by a dense hydrogen and helium atmosphere, much like Uranus and Neptune in our solar system.
K2-37 d was discovered by the K2 observatory, in 2016-08, using the transit method. Its semi-major axis is 0.11 astronomical units, as compared to Earth's which is 1 astronomical unit. The mass of K2-37 d is 7.918 times the mass of Earth. The radius of K2-37 d is 2.730 that of Earth. At more than 10 Earth masses, K2-37 d is an ice giant, a planet that is made up mostly of volatiles like water, amonia and methane, and enveloped by a dense hydrogen and helium atmosphere, much like Uranus and Neptune in our solar system.