Memory Alpha
Memory Alpha

Sector 5 was a spatial region in the Beta Quadrant. A portion of the Neutral Zone was located in this sector.

In 2286, the USS Saratoga was patrolling sector 5 when it began tracking a large unknown alien probe on a trajectory to the Terran solar system. (Star Trek IV: The Voyage Home)

In the Star Trek: Star Charts (p. 19), Sector 5 was also known as the Vulcan Sector. This sector contained the Vulcan system.
The quadrant of origin for this sector was inferred from the location of the Federation-Klingon border in the Beta Quadrant, as depicted in star charts seen in Star Trek: Strange New Worlds and Star Trek: Section 31.

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