Chi Rho III was a planet located somewhere in the space of the galaxy's Alpha or Beta Quadrants, the third planet in orbit of the Chi Rho star system.
History and specifics[]
Located within or near the edges of 23rd century Federation territory, Chi Rho III was the site of a Federation Archaeology Council excavation sometime prior to the year 2293, headed by Doctor Tully. Tully's logs from this archaeology project were required reading at Starfleet Academy in the 2290s decade. (TOS - Strange New Worlds II short story: "The First Law of Metaphysics")