During the Neutral Zone Incursion of 2266, the location of Romii was labeled on a map of Sector Z-6 that was displayed on the bridge viewscreen of the USS Enterprise. (TOS: "Balance of Terror", display graphic)
Background information Edit
This astronomical object was only mentioned in writing.
According to Star Trek Maps (p. 29), Romii was an early Romulan colony. It was a white subdwarf orbited by four planets, with only the inner planet inhabited, with a population of five billion.
According to Star Trek: Star Charts (p. 66, "United Federation of Planets II") and Stellar Cartography: The Starfleet Reference Library ("Federation Historical Highlights, 2161-2385"; "Position of the Romulan Star Empire"), the Romii system was located in the Beta Quadrant. The primary was a K-class star. It was located in the Romulan War Theater of Operations (2156-2160). According to a map of the Romulan Empire – prepared by the Stellar Archive Artist Lsel Essik, from the Romulan Master Data Catalog, in 2366 – Romii was identified as a Romulan star.