Kepler-101 and Its Two Planets

Kepler-101 is a star located 3030 light-years away. Its spectral type is G3 IV, and it is host to two planets. The star's age is 5.9 billion years, its mass is 1.17 solar masses, and its radius is 1.56 solar radii. Its temperature is 5670 K.

The two planets orbiting Kepler-101 are Kepler-101 b and Kepler-101 c, both discovered by transit in 2014. A transit occurs when a planet passes in front of its star from our viewpoint, producing a small dip in observed brightness.

Kepler-101 b is classified as Jupiter-like, a size class for planets whose radius exceeds 4 times Earth's radius. Its mass is 51.1 Earth masses, its radius is 5.77 Earth radii, and its orbital period is 3.49 days. Its mean density is 1.47 g/cm³.

Kepler-101 c is classified as Earth-like, a size class for planets whose radius stays within 1.5 times Earth's radius. Its mass is reported as an upper limit of 3.78 Earth masses, its radius is 1.25 Earth radii, and its orbital period is 6.03 days.

Among the listed planets, Kepler-101 b has the shortest year by reported estimates, at 3.49 days, and the largest radius, at 5.77 Earth radii. Kepler-101 c has the longest year, at 6.03 days, and the smallest radius, at 1.25 Earth radii. The star's reported mass estimate is larger than the Sun's, its reported radius estimate is larger than the Sun's, and its reported temperature is cooler than the Sun's.