A planet that lies in the Romulan Neutral Zone, a region of space that both the United Federation of Planets and the Romulan Star Empire are forbidden by treaty to enter. When the Vendorian masquerading as the late Carter Winston briefly adopted the form of Captain Kirk on stardate 5143.3 (2269), he ordered the bridge crew of the U.S.S. Enterprise to take the starship to the planet Rator III as part of a Romulan plot to provoke a conflict with the Federation.