Ε_Aquarii
Epsilon Aquarii
Star in the constellation Aquarius
Epsilon Aquarii, Latinized from ε Aquarii, is a single[11] star in the equatorial zodiac constellation of Aquarius, located near the western constellation border with Capricornus. It has the proper name Albali /ælˈbeɪli/, now formally recognized by the IAU.[12][13] This is a white-hued star that is visible to the naked eye with an apparent visual magnitude of 3.77.[2] Based upon parallax measurements taken during the Hipparcos mission, it is located at a distance of approximately 208 light-years (64 pc) from the Sun[1] with an absolute magnitude of −0.46.[7] The star is drifting closer with a radial velocity of −15 km/s.[6]
This object is an A-type main-sequence star with a stellar classification of A1 V.[2] It is an estimated 388[9] million years old with a high rate of spin, showing a projected rotational velocity of around 118 km/s.[7] The elemental abundances in the stellar atmosphere are close to solar, with pronounced underabundances of aluminium and strontium.[5] The star has three[3] times the mass of the Sun and about 2.5[8] times the Sun's radius. It is radiating 138[3] times the luminosity of the Sun from its photosphere at an effective temperature of 9,622 K.[9]