Sigma Draconis system
The Sigma Draconis system was an inhabited planetary system consisting of its primary star and nine planets. This system was located in the Alpha Quadrant.

Three planets, Sigma Draconis III, Sigma Draconis IV, and Sigma Draconis VI, were classified as M-class and populated by native species. The other planets in the system – Sigma Draconis I, Sigma Draconis II, Sigma Draconis V, Sigma Draconis VII, Sigma Draconis VIII, and Sigma Draconis IX – were not M-class. There were surveys and long-range scans of this system. Information on the system was stored in the library computers of Federation starships. In 2268, the  entered the system to search for Commander Spock's brain. ()

In 2259, the location of this system was labeled on a stellar cartography chart that was seen on the 's ready room viewscreen. The system's symbol was blue, indicating it was affiliated with the . ()

In 2399, the location of Sigma Draconis was labeled in a Federation star chart that was in Fleet Admiral Kirsten Clancy's office at Starfleet Headquarters. This system was in or near to Federation space. () 

In 3189, the  reported Orion and Andorian vessels from the Emerald Chain in the Sigma Draconis system. ()

Appendices

Background information 
According to Star Trek: Star Charts (pp. 18, 19, and 44) and Stellar Cartography: The Starfleet Reference Library ("Federation Historical Highlights, 2161-2385"), the primary of this system was named Sigma Draconis and was located in Sector 004 (Sigma Draconis sector). This was a Federation system in the late 24th century.

Apocrypha 
In the Ninth UK Story Arc comics, the Enterprise returned to the Sigma Draconis system and discovered a planet composed entirely of liquid. It continued exploring the system in the Tenth UK Story Arc, discovering it to be a theater of warfare in the conflict between the s and the s.

External links 
 
 
 

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nl:Sigma Draconis systeem
Star systems