Neutral Zone map, Birthright II

A star map showing Khitomer on a star chart in 2369

Alpha Beta Quadrant Overview star chart

Alpha/Beta Quadrant Overview

The Khitomer system was an inhabited planetary system in the territory of the Klingon Empire, in the Beta Quadrant. This system consisted of the primary Khitomer and the planet Khitomer. The planet was the location of Camp Khitomer and a Klingon colony which fell victim to a Romulan attack in 2346. (TNG: "Sins of the Father", display graphic; DIS: "Magic to Make the Sanest Man Go Mad")

In 2369, the location of Khitomer was labeled on the Deep Space 9 Traffic Comm Database star chart. (TNG: "Birthright, Part II", display graphic)

The name of this system appeared in a display readout that appeared in "Sins of the Father" but was not referenced in dialogue.
Khitomer, the primary of the Khitomer system, was located in the Beta Quadrant on a star chart seen in the Star Trek: Discovery episode "Magic to Make the Sanest Man Go Mad"}.
According to Star Trek: Star Charts (p. 56) and Stellar Cartography: The Starfleet Reference Library ("Stellar Cartography", pp. 27, 30; "Federation Historical Highlights, 2161-2385"), this was a trinary system with a pair of F-class stars and one K-class star. According to a map of the Klingon Empire – prepared by the Scribe K'Tark for the Klingon High Council in the Year of Kahless 893 (2266} – Khitomer was identified as a Klingon star.