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Delta Vega was the primary of the Delta Vega system. This system had at least one planet, Delta Vega. Delta Vega sector was named after this star. The system was located a few light days from the galactic barrier. This system was located in the Alpha Quadrant. Its location in the Milky Way Galaxy was depicted on a Federation star chart in 2293. (Star Trek VI: The Undiscovered Country; TNG: "Aquiel", display graphic)
In 2367, the star appeared on a chart in Captain Benjamin Maxwell's ready room on the USS Phoenix. (TNG: "The Wounded" display graphic)
In an alternate 2366, Delta Vega was marked on a tactical situation monitor showing the fleet deployments in the Federation-Klingon War. (TNG: "Yesterday's Enterprise" display graphic)