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66 Aquarii
66 Aquarii (g1 Aquarii〔(HD 215167 ), database record, HD-DM-GC-HR-HIP-Bayer-Flamsteed Cross Index, N. D. Kostjuk, Institute of Astronomy of Russian Academy of Sciences, 2002; CDS ID (IV/27A ).〕) is the Flamsteed designation for a star in the equatorial constellation of Aquarius. 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 . 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.〔 ==References==
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