Memory Alpha
Memory Alpha

Theta Zibal III was the inhabited third planet of its star system. It was the homeworld of the warp-capable humanoid Zibalians.

One of the cities on this planet was named Tomobiki City. The planet was mentioned in the Federation biographical database file of Kivas Fajo. (TNG: "The Most Toys" okudagram)

This planet was only mentioned in writing.
The planet might be associated with Zibal, which was a real star.
In the Bayer designation, which was a system of stellar classification, the Greek letter indicated the brightness of a star in a constellation. In this case, Theta Zibal would be the 8th brightest star in its constellation.