Ghar was a star that was located a number of parsecs away from Earth and the Sol system, in Federation space, near the border between the Alpha and Beta Quadrants.
History and specifics
Gharian wedding birds originate from this star's planetary system. These non-sentient avian lifeforms had red-colored heads and blue plumage. (TOS comic: "Sport of Knaves")
The Federation starship USS Ghar was named for this location. (TOS reference: Star Fleet Technical Manual)