The Kepler-339 Exoplanetary System
Kepler-339 is a star with 0.6950000000000001 times the mass of the Sun, and 0.8 times its radius. It is located 2047.18 light years away from the solar system.
Kepler-339 is known to have 3 exoplanets in orbit around it.
Kepler-339 b was discovered by the Kepler observatory using the transit method. Its discovery was announced in 2014-03. Its semi-major axis is 0.06 astronomical units, as compared to Earth's which is 1 astronomical unit. It takes 4.98 Earth days to complete an orbit around its host star, Kepler-339.
The mass of Kepler-339 b is 2.25 times the mass of Earth. The radius of Kepler-339 b is 1.42 that of Earth. At 2.25 Earth masses, Kepler-339 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.