Talos II

Talos II was the second planet in the Talosian system. The planet had no moons. This system was located in the Talos star group, which was a region of space in the Alpha Quadrant. This planet was located at 1.8 astronomical units from the binary stars Talos A and Talos B. (, production art)

Background
The planet was never mentioned in dialog; this name came from a map of the Talosian system.

"The Explored Galaxy"
"The Explored Galaxy" was a map of charted space in the Alpha Quadrant. Talos was located between the Tholian Assembly and Romulus. Both locations were identified in as being located in this quadrant. This chart was also seen in several Star Trek: The Next Generation and Star Trek: Deep Space Nine episodes set in the 24th century, from the year 2364 to 2370. These were: and.

Star Trek: Star Charts
Talos II was classified as a H-class planet. In 2378, Talos II was located in or near Federation space, in the Alpha Quadrant. (pgs. 40-41, "United Federation of Planets III")