A binary system with a G-class star and an A-class star near the Klingon-Federation border. During the mid-23rd century, the system was under Federation control including two planets in the system, Elas and Troyius. 

Large dilitium deposits were discovered on Elas. Following her conviction of mutiny, Michael Burnham was enroute to Elas to work the dilithium mines when her shuttle was intercepted by the U.S.S. Discovery.

Later in the 23rd-century, the crew of the U.S.S. Enterprise aided the marriage between the Dohlman of Elas and the ruler of Troyius.