Pr0211: A Two-Planet System Nearly 596 Light-Years Away

Pr0211 is a star 596 light-years from Earth with two planets. The host star is 0.578 billion years old and has a mass of 0.935 solar masses, a radius of 0.827 solar radii, and a temperature of 5300 K. Its mass and radius are smaller than the Sun's, and its temperature is cooler than the Sun's.

The planets orbit a star whose gravity they tug on, and both were found by the radial velocity method, which detects the wobble a planet induces in its star's motion. Pr0211 b was discovered in 2012 and has a minimum mass of 598 Earth masses, roughly 1.88 times Jupiter's mass, with an orbital period of 2.15 days. Pr0211 c was discovered in 2016, has a minimum mass of 2480 Earth masses - roughly 7.79 times Jupiter's mass and larger than Earth's - and takes 4850 days to complete one orbit. Among the listed planets, Pr0211 b has the shortest orbital period and the smallest minimum mass, while Pr0211 c has the longest orbital period and the largest minimum mass.