HD 116029 and Its Two Known Planets

HD 116029 is a K0 star located 402 light-years away. Its reported mass estimate is 1.58 solar masses and its radius estimate is 4.6 solar radii, both larger than the Sun's. Its temperature is 4950 K, cooler than the Sun's, and its age is 2.7 billion years. Two planets are known to orbit this host: HD 116029 b and HD 116029 c.

Both planets were found by 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 116029 b was discovered in 2011, and its minimum mass, a lower bound on its true mass, is 445 Earth masses. That is larger than Earth's and roughly 1.4 times Jupiter's mass. It completes one orbit every 670 days, the shortest year among the listed planets by reported estimates.

HD 116029 c was discovered in 2016. Its minimum mass is 404 Earth masses, larger than Earth's and roughly 1.27 times Jupiter's mass, and the smallest minimum mass among the listed planets. It orbits every 907 days, the longest year among the listed planets by reported estimates.