Commission for @something-boring of Teniche, the homeworld of the semiaquatic species Laqah, and the world the Romulans displaced them onto, Qizill. Teniche, known to the Romulans as Devoras, is the base of the mining and aerocapture operations within the system, and possesses a shipyard as well.
The three worlds depicted above are the moons of the gas giant Saqarma in the 11782 Tri B system. Below is an overview of the 11782 Tri star system as well as the two planets orbiting the 11782 Tri B/BB barycenter. (There are also planets orbiting 11782 Tri A and AB and the whole system barycenter, but they're irrelevant).
Saqarma is a resource rich planet with highly valuable compounds in its atmosphere and its rings, and with a strong magnetic field to boot. The dangerous radiation belts and debris ring are both hazardous environments which make even routine space travel in the Saqarma system difficult.