WASP-99 is a star with 1.21 times the mass of the Sun, and 1.64 times its radius. It is located 517.48 light years away from the solar system and is estimated to be 3 billion years old, as compared to the Sun which is roughly 4.6 billion years old.
WASP-99 is known to have 1 exoplanets in orbit around it.
WASP-99 b was discovered by the SuperWASP observatory, in 2014-05, using the transit method. Its semi-major axis is 0.07 astronomical units, as compared to Earth's which is 1 astronomical unit. The mass of WASP-99 b is 772.740 times the mass of Earth. The radius of WASP-99 b is 11.433 that of Earth. At more than 50 Earth masses, WASP-99 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.