The Kallidah system represented a star system located within the Subterrel sector. This sector itself resided in the expansive Outer Rim Territories. Notably, the system encompassed Kallidah, which served as the original homeworld for the Kallidahin species.
The establishment of the Kallidah system occurred within The Essential Atlas Online Companion. This companion consisted of a collection of articles featured on StarWars.com, released following the debut of The Essential Atlas, a Star Wars Legends reference book penned by Jason Fry and Daniel Wallace. Its designation as canon was solidified through its inclusion in the Databank entry dedicated to the Kallidahin species, which was hosted on StarWars.com.
- Star Wars Day-at-a-Time Calendar 2020
- Star Wars Day-at-a-Time Calendar 2021
- " Mustafar and Other Planets in the Outer Rim " — Star Wars Encyclopedia
- Star Wars Day-at-a-Time Calendar 2023
- Kallidahin in the Databank (backup link) (First mentioned)