KOI-55 is a star with 0.5 times the mass of the Sun, and 0.2 times its radius. It is located 4015.05 light years away from the solar system.
KOI-55 is known to have 2 exoplanets in orbit around it.
KOI-55 b was discovered by the Kepler observatory, in 2011-12, using the orbital brightness modulation method. Its semi-major axis is 0.01 astronomical units, as compared to Earth's which is 1 astronomical unit. The mass of KOI-55 b is 0.445 times the mass of Earth. The radius of KOI-55 b is 0.759 that of Earth. At less than 1.5 Earth masses, KOI-55 b is a regular terrestrial planet, much like the terrestrial planets we find in our solar system, namely Mercury, Venus, Earth and Mars.
KOI-55 c was discovered by the Kepler observatory, in 2011-12, using the orbital brightness modulation method. Its semi-major axis is 0.01 astronomical units, as compared to Earth's which is 1 astronomical unit. The mass of KOI-55 c is 0.668 times the mass of Earth. The radius of KOI-55 c is 0.867 that of Earth. At less than 1.5 Earth masses, KOI-55 c is a regular terrestrial planet, much like the terrestrial planets we find in our solar system, namely Mercury, Venus, Earth and Mars.