Psi³ Aquarii

One of a trio of stars designated 'Psi Aquarii' in the eastern parts of Aquarius. Despite their shared Bayer designation, these three stars are unconnected, apart from the fact that they lie on a close line of sight as seen from Earth. Psi³ is the southernmost of the three, and also the faintest, though not the most distant. Psi² lies considerably farther from the Solar System than Psi³, but is a much more luminous star, and so appears brighter in the sky.

This is a multiple star, with the primary being a dwarf of the A-type white classification, nearly three times the Sun's diameter and more than fifty times as luminous. Pursuing a wide orbit around this white star at a distance of some 120 AU is a companion star, which appears to be unusually active and emits high levels of X-rays. There are also indications of second companion star in a still more distant orbit around the white primary.