Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. HR 4523 is a binary star system that is located in the constellation of Centaurus. The larger member of the system is a G-type star that is smaller than the Sun but of similar mass. It is orbited by a faint M-type star at an average separation of about 235 Astronomical Units. By comparison, Neptune orbits at an average distance of 30 A.U. The HR 4523 system is a member of the Epsilon Indi Moving Group, although it is most likely an interloper.