Tezel-Oroko is the official Federation name for the star system including the planet Tezwa.

Tezel and Oroko are a primary star and a failed protostar gas giant binary pair. The system includes at least two planets - other than Tezwa, the outermost planet is an icy rock. (TNG novel: A Time to Kill)

In 2155, United Earth and the Confederacy of Vulcan jointly planned a covert listening post in the Kuiper belt of the Tezel-Oroko system, in order to gather intelligence on the nearby Klingon Empire and Romulan Star Empire. That year, the freighter ECS Kobayashi Maru was destroyed by Romulan forces in the system while transporting personnel and equipment to this post. (ENT novel: Kobayashi Maru)