WASP-81 is a star with 1.08 times the mass of the Sun, and 1.28 times its radius. It is located 1299.75 light years away from the solar system.
WASP-81 is known to have 1 exoplanets in orbit around it.
WASP-81 b was discovered by the Multiple Facilities observatory, in 2017-05, using the transit method. Its semi-major axis is 0.04 astronomical units, as compared to Earth's which is 1 astronomical unit. The mass of WASP-81 b is 231.822 times the mass of Earth. The radius of WASP-81 b is 16.018 that of Earth. At more than 50 Earth masses, WASP-81 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.