Kepler-82: A Sun-Like Star and Its Five Worlds

Kepler-82 is a G-type star located 2950 light-years away. Its reported mass is 0.96 solar masses, its radius is 0.93 solar radii, its temperature is 5530 K, and its age is 4.68 billion years. The star's reported mass, radius, and temperature estimates are all smaller or cooler than the Sun's. Five planets are known to orbit this host.

Kepler-82 b and Kepler-82 c are both Jupiter-like planets discovered by transit in 2012. Kepler-82 b has a mass of 12.2 Earth masses, a radius of 4.07 Earth radii, and an orbital period of 26.4 days. Kepler-82 c has a mass of 13.9 Earth masses, a radius of 5.34 Earth radii, and an orbital period of 51.5 days. Both have reported radii and masses larger than Earth's, and their estimated mean densities are 0.993 g/cm³ and 0.503 g/cm³ respectively.

Kepler-82 d and Kepler-82 e are Super-Earths discovered by transit in 2014. Kepler-82 d has a radius of 1.77 Earth radii and an orbital period of 2.38 days, while Kepler-82 e has a radius of 2.47 Earth radii and an orbital period of 5.9 days. Both have reported radii larger than Earth's. Among the listed planets, Kepler-82 d has the shortest year by reported estimates, and Kepler-82 e has the second-shortest year.

Kepler-82 f was discovered in 2019 by Transit Timing Variations. It has a mass of 20.9 Earth masses and an orbital period of 75.7 days. Its reported mass estimate is larger than Earth's. Among the listed planets, Kepler-82 f has the longest year by reported estimates, and Kepler-82 c has the second-longest year.