The Altarrn system, which encompassed the planet of [Altarrn], existed as a star system situated in the Mid Rim area of the galaxy, specifically within the Glythe sector.
- " Twinkle, Twinkle Little Star, How I Wonder Where We Are " — Voyages SF 13 (referred to as the "Altaarn system")
- The Essential Atlas
- The Star Wars: The Essential Atlas Online Companion, found on StarWars.com (article) (backup link)