The Planet of Bet UMi

Bet UMi is a K4 III star 126 light-years away. It is 2.95 billion years old, with a mass of 1.4 solar masses - larger than the Sun's - and a radius of 38.3 solar radii, also larger than the Sun's. Its temperature of 4130 K is cooler than the Sun's. One planet orbits this host.

That planet, bet UMi b, was discovered in 2014 by the radial velocity method, which detects the wobble a planet's gravity induces in its star's motion; repeated wobbles reveal the planet and its orbital period. Its minimum mass is a lower bound on its true mass rather than an ordinary estimate. At 1940 Earth masses, bet UMi b is more massive than Earth and roughly 6.1 times Jupiter's mass. It completes one orbit, or year, every 522 days.