Kepler-1705 and Its Two Super-Earths

Kepler-1705 is a star located 5,330 light-years away, and two planets have been found orbiting it. The host star is 2.59 billion years old and has a mass of 1.14 solar masses, a radius of 1.26 solar radii, and a temperature of 6310 K. Each of these estimates is larger than the corresponding value for the Sun, and the star is also hotter than the Sun.

Both planets are Super-Earths, a size class that extends to 2.5 times Earth's radius. They were discovered 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; repeated dips help establish orbital periods. Both discoveries were reported in 2021.

Kepler-1705 b has a radius of 2.03 Earth radii, a mass of 4.47 Earth masses, and an orbital period of 9.04 days. Its mean density is 2.94 g/cm³, 0.534 times Earth's. Kepler-1705 c has a radius of 2.05 Earth radii, a mass of 5.42 Earth masses, and an orbital period of 11.3 days. Its mean density is 3.47 g/cm³, 0.629 times Earth's. Both planets are larger in radius and mass than Earth. Among the listed planets, Kepler-1705 b has the shortest year and the smallest radius and reported mass, while Kepler-1705 c has the longest year and the largest radius and reported mass.