The Nelvana system was an uninhabited planetary system in the Beta Quadrant. This system consisted of the primary Sigma Nelvana and five planets. During the mid-24th century, the system was a strategically significant point in the Romulan Neutral Zone. From this system, the Romulan Star Empire was within striking distance of fifteen Federation sectors.
In 2399, the location of Nelvana was labeled on a star chart that was in Fleet Admiral Kirsten Clancy's office at Starfleet Headquarters. This system was in or near to space claimed by the Romulan Free State. (PIC: "Maps and Legends")