Romulus system
The Romulus system was an inhabited planetary system in Sector Z-6 of the Beta Quadrant. The system consisted of a primary and at least four planets. The second and third planets were Romulus and Remus, the homeworlds of the Romulans and Remans, respectively. (, display graphic; , production art; ; ) 

In 2259, the capital system of the Romulan Star Empire's location was seen on a stellar cartography chart seen on the 's ready room viewscreen. The system's symbol had a green color, indicating its affiliation with the empire. ()

During the Neutral Zone Incursion of 2266, the location of the Romulan system was labeled on a star chart of Sector Z-6 that was displayed on the bridge viewscreen of the . (, production art)

In 2293, the location of Romulus and Remus in the Milky Way Galaxy was labeled in a star chart that was in Captain James T. Kirk's quarters aboard the . (, okudagram)

In 2387, the Romulan sun exploded in a supernova and destroyed its planets. (, )

In 2399, the star chart in Fleet Admiral Kirsten Clancys office at Starfleet Headquarters did not show the location of the Romulan system. ()

See also  
 Romulan planets

Appendices

Background information 
This system was first named in the  episode .

According to StarTrek.com, the primary in the system was named Romulus. 

According to Star Trek: Star Charts (p. 66) and Stellar Cartography: The Starfleet Reference Library ("Federation Historical Highlights, 2161-2385"; "Position of the Romulan Empire"), the Romulus system was located in the Beta Quadrant. It was a binary system with a M-class star and a K-class star. This system was in the Romulan War Theater of Operations (2156-2160). In 2266, the Praetor's flagship departed the Romulus system on its mission to the Neutral Zone. According to a map of the Romulan Empire – prepared by the Stellar Archive Artist Lsel Essik, from the Romulan Master Data Catalog , in 2366 – Romulus was identified as a Romulan star.

Apocrypha 
According to Star Trek Maps (p. 29) and The Worlds of the Federation (p. 148), the Romulan star system was a binary star system of two white dwarfs known by the Federation as Romulus (primary) and Romulus B (secondary). In Diane Duane's Rihannsu novels, the Romulan system was a single G9-class star, known as 128 Trianguli to the Federation and Eisn to the Romulans ("homesun" in the Romulan language).

External link 
 

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Star systems