WASP-77 A is a star with 1.49 times the mass of the Sun, and 1.09 times its radius. It is located 343.01 light years away from the solar system and is estimated to be 1 billion years old, as compared to the Sun which is roughly 4.6 billion years old.
WASP-77 A is known to have 1 exoplanets in orbit around it.
WASP-77 A b was discovered by the SuperWASP observatory, in 2013-01, using the transit method. Its semi-major axis is 0.02 astronomical units, as compared to Earth's which is 1 astronomical unit. The mass of WASP-77 A b is 728.220 times the mass of Earth. The radius of WASP-77 A b is 15.468 that of Earth. At more than 50 Earth masses, WASP-77 A 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.