Kadyl
From Star Trek : Freedom's Wiki
The moon Kadyl is a Class H body orbiting a dead Class N world in the Omicron Persei System. It has an atmosphere consisting of 60% Helium, 25% Methane and 15% Oxygen. As such it is considered uninhabitable.
There were remains of an ancient civilization on the moon. The world is believed to the the origins for the Soldarin species. Among the moons artifacts are the Soldarin Archives, the Soldarin Monolith and the Soldarin Memory Extraction Machine.
The ruins were discovered by the crew of the USS Rosenante in 2414 when they followed the Soldarin Archive Probe into the system.
Kadyl was first seen in the USS Rosenante Mission Lest We Forget
