The Taugan system was a star system with several planets. This system was located in Sector 2158, a region of space in the Beta Quadrant.

Several of these planets had been raided by the mercenaries led by Arctus Baran in 2369 and 2370 in search for ancient Vulcan artifacts. This was mentioned in a conversation between Commander Riker and Vulcan minister Satok. (TNG: "Gambit, Part II")

In the script, Riker say Taugan sector instead of system. A Taugan sector appears in the Star Trek: Star Charts (p. 66), containing a star named Taugus (Gamma Equulei) and one called Barradas, presumably associated with the planet Barradas III from the episode.
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