Planets Around the K-Type Star HD 184010

HD 184010 is a K-type star 198 light-years away whose spectral type, K0 III-IV, places it among the cooler, more orange stars. It has 3 known planets, all discovered in 2022 by the radial velocity method. The star's mass estimate of 1.35 solar masses is larger than the Sun's, and its radius estimate of 4.86 solar radii is likewise larger than the Sun's. Its temperature of 4970 K is cooler than the Sun's, and its age is 2.76 billion years.

The radial velocity method measures the wobble a planet's gravity induces in its star's motion, with repeated wobbles revealing the planet and its orbital period. HD 184010 b has a minimum mass of 98.5 Earth masses and an orbital period of 287 days, the shortest year among the listed planets. HD 184010 c has a minimum mass of 95.3 Earth masses and an orbital period of 484 days, the second-shortest year. HD 184010 d has a minimum mass of 143 Earth masses and an orbital period of 836 days. All three minimum masses are larger than Earth's, and each is a lower bound on the planet's true mass. Among the listed planets, HD 184010 c has the smallest minimum mass and HD 184010 d has the largest.