66 Aquarii

66 Aquarii (abbreviated 61 Aqr) is a star in the equatorial constellation of Aquarius. 66 Aquarii is the Flamsteed designation though the star also bears the Bayer designation of g¹ Aquarii. It is visible to the naked eye with an apparent visual magnitude of 4.673. Based upon an annual parallax shift of 7.53 milliarcseconds, the distance to this star is about 430 light-years (130 parsecs).

This is an evolved giant star with a stellar classification of K3 III. It has expanded to 37 times the radius of the Sun and is radiating energy from its outer envelope at an effective temperature of 4,170 K. This gives it the orange-hued glow of a K-type star. It is a suspected variable star that ranges in magnitude between 4.66 and 4.71.