Kepler-131 and Its Two Planets

Kepler-131 is a star located 746 light-years from Earth. It has a mass of 1.02 solar masses and a radius of 1.03 solar radii. Its reported temperature is 5690 K, cooler than the Sun's, and its age is 3.66 billion years. Two planets are known to orbit this star, both 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-131 b is classified as a Super-Earth, a size class that reaches 2.5 times Earth's radius. Its radius is 2.41 Earth radii and its mass is 16.1 Earth masses, both larger than Earth's corresponding values. It completes an orbit in 16.1 days, the shortest period among the listed planets. Its mean density is 6.35 g/cm³, 1.15 times Earth's.

Kepler-131 c is classified as a Sub-Earth, meaning its radius is smaller than Earth's. Its radius is 0.84 Earth radii, the smallest among the listed planets, while its mass is 8.25 Earth masses, the smallest reported mass among the listed planets and larger than Earth's mass. Its orbital period is 25.5 days, the longest among the listed planets. Its mean density is 76.7 g/cm³, 13.9 times Earth's.