Theta Pictoris was the primary of its star system.
In 2293, the location of this star was labeled in a star chart found on the navigation console of the USS Enterprise-B. (Star Trek Generations)
This star was only mentioned in writing.
According to Star Trek: Star Charts ("United Federation of Planets I"; "United Federation of Planets II"), the Theta Pictoris (Catulla) system was home to the inhabited planet Catulla, This system was located in the Beta Quadrant. The system's primary was a G-class star.