The Ternin system, a star system, resided in the Alchenaut sector of the Western Reaches, itself a region within the larger Expansion Region. This system is notable as the place from which Ternin tree slings originated, a primitive form of slings.
The Ternin system's existence was first documented in the StarWars.com Online Companion that accompanied the The Essential Atlas reference book from 2009, specifying its location as grid square L-16.