Sigma III solar system
The Sigma III solar system was a formerly inhabited planetary system close to Starbase G-6. In the mid-24th century, the  had a mining colony on Quadra Sigma III, a planet in this system.

In 2364, the starship  received a distress call from the colony following a catastrophic mining accident. The Enterprise-D rescued nine survivors from the ill-fated colony. ()

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Star systems