Gliese 777 Ab
Extrasolar planet in the constellation Cygnus
Gliese 777 Ab, also known as HD 190360 b, is an extrasolar planet approximately 52 light-years away in the constellation of Cygnus. The planet was discovered orbiting the primary star of the Gliese 777 system in June 2002 using the radial velocity method. The planet is at least one half more massive than Jupiter but roughly the same size as Jupiter. In 2021, the inclination of Gliese 777 Ab was measured via astrometry, allowing the true mass of 1.8 MJ to be determined.