HD 180617 is a star with 0.45 times the mass of the Sun, and 0.45 times its radius. It is located 19.28 light years away from the solar system.
HD 180617 is known to have 1 exoplanets in orbit around it.
HD 180617 b was discovered by the Calar Alto Observatory observatory, in 2018-10, 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 180617 b is 12.208 times the mass of Earth. The radius of HD 180617 b is 3.530 that of Earth. At more than 10 Earth masses, HD 180617 b is an ice giant, a planet that is made up mostly of volatiles like water, amonia and methane, and enveloped by a dense hydrogen and helium atmosphere, much like Uranus and Neptune in our solar system.