2466 PM

From Memory Alpha, the free Star Trek reference

2466 PM is a position or region of space located near 2279 PL. It is approximately 22.3 parsecs beyond Cestus III and the Federations chart limits during the late 23rd century. A previously unexplored star system, held under the Metron sphere of influence, was located in this region.

In 2267, a Gorn starship passed near this region as it was pursued by the USS Enterprise, heading away from this region. (TOS: "Arena")