Tyrst was a planet located somewhere in the space of the galaxy's Alpha or Beta Quadrants, in orbit of the Barnard 392 star system, at coordinates 0.24N 5.55W.

In the 23rd century, Tyrst was home to a Federation agricultural colony noted for its status as a cultural center. By reference stardate 2/2306.01, the world had a population of less than 100,000 individuals of mixed races and cultures, chartered as a dependent colony of the Federation. (FASA RPG module: The Federation)