The Transel system was located within the Southern Core region of the Colonies. It was positioned along the Shipwrights' Trace hyperlane, a route connecting it with the Bassadro, Fondor, and Surric systems. This system was home to the relatively unknown terrestrial planet Transel, which had joined the Galactic Republic by the year 3956 BBY. During the Jedi Civil War, which spanned from 3959 BBY to 3956 BBY, the military forces belonging to the empire established by the Sith Lord Darth Revan traversed the Transel system as they moved from the Fondor system towards the Surric system.
The reference book The Essential Atlas, published in 2009 and authored by Daniel Wallace and Jason Fry, was the first source to mention the Transel system, locating it within grid square L-13.