planet name Class: Affiliation: Star system: Surface: Dominant species: Mirhassa was a planet in the Romulan Star Empire, described as a "distant outworld". (TOS novel: The Empty Chair) Mirhassa was located on the edge of the Romulan Neutral Zone, across the Romulan-Federation border from the Calder system. (Bait and Switch: "Mistletoe on Mirhassa")