Although Sagitta ("The Arrow") was a real constellation visible from Earth, there was no star with the prefix "omega" since standard nomenclature in this constellation ended with Eta. Furthermore, a hypothetical "omega" star in this constellation should have the name "Omega Sagittae", as the genitive of Sagitta has to be applied.
Straleb, a planet in this system, was on a star chart that was seen in Star Trek Generations. The chart depicted the location of planets, stars, and star systems in the Alpha Quadrant. Based on the dimensions of the circles used to mark locations on the star chart seen in "Generations", this planet was located relatively far to the USS Enterprise-D.