Talos I

Talos I was the first planet in the Talosian system. The planet had no moon. This system was located within the Talos star group, which was a region of space in the Alpha Quadrant. This small planet was located over one astronomical unit 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 I was classified as a B-class planet. In 2378, Talos I was located in or near Federation space, in the Alpha Quadrant. (Pgs. 40-41, "United Federation of Planets III")