HD 45184: A Sun-Like Star With Two Known Planets

HD 45184 is a G2V star, a Sun-like spectral type, located 71.6 light-years away. Its measured mass is 1.01 solar masses, and its radius is 1.08 solar radii. The star's reported temperature is 5810 K, hotter than the Sun's, and its age is 6.8 billion years. Two planets are known to orbit this host.

Both planets were discovered in 2019 using the radial velocity method, which measures the wobble a planet's gravity induces in its star's motion; repeated wobbles reveal the planet and its orbital period. HD 45184 b has a minimum mass of 12.2 Earth masses and an orbital period of 5.89 days, giving it the shortest year among the listed planets. HD 45184 c has a minimum mass of 8.81 Earth masses and an orbital period of 13.1 days, the longest year among the listed planets. A minimum mass is a lower bound on a planet's true mass, and both planets' minimum masses are larger than Earth's. Among the listed planets, HD 45184 c has the smallest minimum mass and HD 45184 b has the largest.