Denab system
According to a deleted scene from , the Denab system was a star system unexplored by the United Federation of Planets as of 2379. 

That year, following her repair and refit, the  was scheduled to explore this system. This was the first mission that Commander Madden served as executive officer aboard the Enterprise.

The closed captioning spelled the name of this system as "Danapp," however the correct spelling is found in the film's script. 

This system was mentioned in the Star Trek: Star Charts ("United Federation of Planets II"). It was located in the Alpha Quadrant. The system's primary was a K-class star.

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