Sojourn was a planet located somewhere in the space of the galaxy's Alpha or Beta Quadrants, the second planet in orbit of the Servitrix star system, at coordinates 2.19N 2.57E.

In the 23rd century, Sojourn was home to a Vulcan colony, a noted industrial center. By reference stardate 2/2306.01, the world had a population of 2 million individuals, mostly Vulcan, chartered as a dependent of the Federation. (FASA RPG module: The Federation)