Yrrna systemCanonLegendsInfinities Sources TIE Fighter: Defender of the Empire: Official Secrets & SolutionsTIE Fighter Collector's CD-ROM: The Official Strategy GuideStar Wars EncyclopediaThe Complete Star Wars EncyclopediaThe Essential AtlasAppearancesStar Wars: TIE Fighter: Defender of the Empire (First appearance) (Unknown)Unknown UnknownNone