HD 178911 B is a star with 1.24 times the mass of the Sun, and 1.08 times its radius. It is located 133.63 light years away from the solar system.
HD 178911 B is known to have 1 exoplanets in orbit around it.
HD 178911 B b was discovered by the W. M. Keck Observatory observatory, in 2002-03, using the radial velocity method. Its semi-major axis is 0.34 astronomical units, as compared to Earth's which is 1 astronomical unit. The mass of HD 178911 B b is 2553.540 times the mass of Earth. The radius of HD 178911 B b is 12.600 that of Earth. At more than 50 Earth masses, HD 178911 B 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.