BD+49 828 and Its Planet

BD+49 828 is a K0 star located 1440 light-years away. Its spectral type places it in the K class, cooler and redder than the Sun. The star is estimated to be 2.34 billion years old, with a mass of 1.52 solar masses, a radius of 7.6 solar radii, and a temperature of 4940 K. Its mass and radius are both larger than the Sun's, while its temperature is cooler. One planet orbits this star.

That planet, BD+49 828 b, was discovered in 2015 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. BD+49 828 b has a minimum mass of 509 Earth masses, a lower bound on its true mass, and completes an orbit every 2590 days. Its minimum mass is larger than Earth's and roughly 1.6 times Jupiter's mass.