Kepler-103: A Sun-Like Star and Its Two Giant Planets

Kepler-103 is a star located 1610 light-years away with a spectral type of G2, placing it in the same temperature class as the Sun. Its reported mass is 1.21 solar masses, its reported radius is 1.49 solar radii, and its reported temperature is 6050 K, all larger or hotter than the Sun's corresponding values. Two planets are known to orbit this host.

Kepler-103 b is a Neptune-like planet discovered by transit in 2014. It has a mass of 11.7 Earth masses, a radius of 3.49 Earth radii, and an orbital period of 16 days, the shortest year among the listed planets. Its mean density is 1.52 g/cm³, 0.276 times Earth's, and among the listed planets it has the smallest radius and the smallest reported mass.

Kepler-103 c is a Jupiter-like planet, also discovered by transit in 2014. It has a mass of 58.5 Earth masses, a radius of 5.45 Earth radii, and an orbital period of 180 days, the longest year among the listed planets. Its mean density is 1.99 g/cm³, 0.36 times Earth's. Among the listed planets, Kepler-103 c has the largest radius and the largest reported mass.