Tags: Star.
Phi Aquarii (φ Aqr φ Aquarii) is the Bayer designation for a binary star system in the equatorial constellation of Aquarius. It is visible to the naked eye with an apparent visual magnitude of +4.223. Parallax measurements from the Hipparcos mission indicate its estimated distance from Earth is roughly 220 light-years (67 parsecs).This is a spectroscopic binary star system with an estimated period of 2500 days.
