HIP 65407: A K-Type Star with Two Known Planets

HIP 65407 is a K0 star located 202 light-years away. Its spectral type places it in the K class, cooler and redder than the Sun, and its reported temperature of 5460 K is cooler than the Sun's. The star has a mass of 0.93 solar masses. Two planets are known to orbit it, both discovered in 2016 by the radial velocity method, which measures the wobble a planet's gravity induces in its star's motion.

HIP 65407 b has a minimum mass of 136 Earth masses, a lower bound on its true mass, and an orbital period of 28.1 days. HIP 65407 c has a minimum mass of 249 Earth masses and an orbital period of 67.3 days. Both minimum masses are larger than Earth's. Among the listed planets, HIP 65407 b has the shortest year by reported estimates, while HIP 65407 c has the longest. HIP 65407 b also has the smallest minimum mass among the listed planets, and HIP 65407 c the largest.