According to the Star Trek: Star Charts (pgs. 45, 60, "United Federation of Planets I"), the Coridan (or Chi 1 Orionis) system was located in or near Federation space. This was a trinary star system. Coridan A was a G-class star with a magnitude of +3, which was ten times brighter than Sol. Coridan B and Coridan C were both G-class stars.