Expansion Region (Earth-2356)

The Expansion Region is a region of the galaxy located between the Inner Rim and the Mid Rim. In addition to the Ghost Nebula, which contains the planet Umbara, the Expansion Region includes planets such as Cvetaen, Sumitra, Aquaris, Kerkoidia, Thustra, and Sibensko.

Source

 * https://starwars.fandom.com/wiki/Expansion_Region