Thelonii was a location in the same region as Sol/Jupiter. Its companion was Xanthii.
In 2285, Thelonii's position was displayed on a star chart on the bridge of the USS Enterprise. (Star Trek II: The Wrath of Khan)
This location was only mentioned in writing.
The image was taken from page T0:02:07:02 of the Star Fleet Technical Manual by Franz Joseph. The map claimed to depict principal star systems in the Federation. According to the scale, Thelonii was located a parsec from Sol. The name of a third companion, Alfr, was not seen in the movie.
External link[]
- Thelonii at Memory Beta, the wiki for licensed Star Trek works