Kepler-206 and Its Three Worlds

Kepler-206 is a star located 1,940 light-years away, and it hosts three planets. The star is 5.25 billion years old, with a mass of 1.05 solar masses and a radius of 1.12 solar radii. Its temperature is 5850 K. The star's reported mass and radius estimates are both larger than the Sun's.

All three planets were discovered in 2014 by the transit method, in which a planet passes in front of its star from our viewpoint and causes a small dip in observed brightness. Kepler-206 b is an Earth-like planet with an orbital period of 7.78 days and a radius of 1.2 Earth radii. Kepler-206 c is a Super-Earth with an orbital period of 13.1 days and a radius of 1.77 Earth radii; its reported radius estimate is larger than Earth's. Kepler-206 d is an Earth-like planet with an orbital period of 23.4 days and a radius of 1.19 Earth radii.

Among the listed planets, Kepler-206 b has the shortest year, at 7.78 days, while Kepler-206 d has the longest, at 23.4 days. Kepler-206 c has the second-shortest year, at 13.1 days. In radius, Kepler-206 c is the largest at 1.77 Earth radii, Kepler-206 d is the smallest at 1.19 Earth radii, and Kepler-206 b is second-smallest at 1.2 Earth radii.