Kepler-205 and Its Two Planets

Kepler-205 is a star located 521 light-years away with two planets, both discovered by transit in 2014. The transit method detects the slight dimming caused when a planet crosses in front of its star. Kepler-205 is an M1 V star, a small, cool red dwarf with a spectral class indicating a temperature cooler than the Sun's. It has an age of 3.16 billion years, a mass of 0.6 solar masses, a radius of 0.58 solar radii, and a temperature of 4260 K.

Both planets are classified as Super-Earths, a size class reaching up to 2.5 times Earth's radius. Kepler-205 b has an orbital period of 2.76 days and a radius of 1.51 Earth radii, making it the shortest-period and smallest-radius planet among the listed planets. Kepler-205 c has an orbital period of 20.3 days and a radius of 1.64 Earth radii, making it the longest-period and largest-radius planet among the listed planets. Both planets have radii larger than Earth's.