The Rell system encompassed a minimum of six planets. The sixth planet within this system was the gas giant known as Rellnas, which possessed one moon, Rellnas Minor, the original homeworld of the [Rellarin](/article/rellarin] species.
Initially, the Rell system appeared in The Essential Atlas Online Companion under the designation "Rellnas Minor system." This was later changed to the "Rellnas system" in the most recent update issued in October, 2012.