Sadr, also known as Gamma Cygni, is a star system located near the space of the Federation, near Upsilon Mensae, Ilyria, Cygnia Minor and Starbase 7. A binary system with two white stars, Gamma Cygni is visible from Earth in the Cygnus constellation, some 1,523 light-years distant. The system has a total of nine planets, with the second world being notable to space travelers as the homeworld of the ailurin Sadrao civilization. The Sadrao language is also named based on its origination in this system. (ST reference: Star Trek Maps; TOS novel: The Wounded Sky)