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The two brightest stars, α Aquarii and β Aquarii, are luminous yellow supergiants, of spectral types G0Ib and G2Ib respectively, [11] that were once hot blue-white B-class main sequence stars 5 to 9 times as massive as the Sun. The two are also moving through space perpendicular to the plane of the Milky Way.
β Aquarii is the brightest star in Aquarius with an apparent magnitude of 2.87 [2] and a stellar classification of G0 Ib. [3] Since 1943, the spectrum of this star has served as one of the stable anchor points by which other stars are classified. [22]
• Notes = Common name(s) or alternate name(s); comments; notable properties [for example: multiple star status, range of variability if it is a variable star, exoplanets, etc.] See also [ edit ]
Delta Aquarii (δ Aquarii, abbreviated Delta Aqr, δ Aqr), officially named Skat / ˈ s k æ t /, [16] is the third-brightest star in the constellation of Aquarius.The apparent visual magnitude is 3.3, [17] which can be seen with the naked eye.
Gamma Aquarii, or γ Aquarii, is a binary star system [6] in the constellation of Aquarius. It has an apparent visual magnitude of 3.849, [ 2 ] making it one of the brighter members of the constellation.
The apparent visual magnitude of 2.94 [2] makes this the second-brightest star in Aquarius. Based upon parallax measurements made by the Gaia spacecraft, it is located at a distance of roughly 690 light-years (210 parsecs) from the Sun. [5] It is drifting further away from the Sun with a radial velocity of 7.5 km/s. [4]
94 Aquarii (abbreviated 94 Aqr) is a triple star [12] system in the equatorial constellation of Aquarius. 94 Aquarii is the Flamsteed designation.The brightest member has an apparent visual magnitude of 5.19, [2] making it visible to the naked eye.
The Sun is the brightest star as viewed from Earth, at −26.78 mag. The second brightest is Sirius at −1.46 mag. For comparison, the brightest non-stellar objects in the Solar System have maximum brightnesses of: the Moon −12.7 mag [1] Venus −4.92 mag; Jupiter −2.94 mag; Mars −2.94 mag; Mercury −2.48 mag; Saturn −0.55 mag [2]