HD 224538 is a star with 1.34 times the mass of the Sun, and 1.54 times its radius. It is located 257.86 light years away from the solar system and is estimated to be 2 billion years old, as compared to the Sun which is roughly 4.6 billion years old.
HD 224538 is known to have 1 exoplanets in orbit around it.
HD 224538 b was discovered by the Multiple Observatories observatory, in 2017-04, using the radial velocity method. Its semi-major axis is 2.28 astronomical units, as compared to Earth's which is 1 astronomical unit. The mass of HD 224538 b is 1898.460 times the mass of Earth. The radius of HD 224538 b is 12.800 that of Earth. At more than 50 Earth masses, HD 224538 b is a gas giant, a planet whose mass is mostly made up of hydrogen and helium, like Jupiter and Saturn in our solar system.