The Planets of rho CrB

rho CrB is a G2V star 57 light-years from Earth with three known planets. Its spectral type marks it as a Sun-like main-sequence dwarf. The star is 11 billion years old and has a mass of 0.97 solar masses, a radius of 1.35 solar radii, and a temperature of 5820 K.

rho CrB e was discovered in 2023 by radial velocity measurements and has a minimum mass of 3.71 Earth masses and an orbital period of 12.9 days. rho CrB b, discovered in 1997, has a minimum mass of 348 Earth masses and an orbital period of 39.8 days. rho CrB c, discovered in 2016, has a minimum mass of 27.4 Earth masses and an orbital period of 102 days.

Among the listed planets, rho CrB e has the shortest year and the smallest minimum mass, while rho CrB b has the largest minimum mass and the second-shortest year. rho CrB c has the second-smallest minimum mass and the longest year. The minimum mass of rho CrB b is roughly 1.1 times Jupiter's mass. The star's reported mass estimate is smaller than the Sun's, its radius estimate is larger, and its temperature is hotter.