Tau Ceti IV

From Memory Alpha, the free Star Trek reference

Tau Ceti IV is the fourth planet in the Tau Ceti system.

During the 23rd century, the Tau Ceti city of Amber was the homeport of the 3rd class neutronic fuel carrier USS Kobayashi Maru, and her master Kojiro Vance. (Star Trek II: The Wrath of Khan)

This information was found on the Kobayashi Maru scenario data screen. It is unknown whether this information is factual or fictional.