The Vaskan sector was a region of space in the Delta Quadrant.

In 2374, the USS Voyager landed on a Y class planetoid in the Vaskan sector to replenish its deuterium supplies, where it encountered a bio-mimetic lifeform. (VOY: "Course: Oblivion")

Vaskan sector might be named for the homeworld of the Vaskans (and Kyrians), which was visited by Voyager in "Living Witness", shortly before the events of "Demon".
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