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The giant primary star is a Mira variable, a star that pulsates and changes temperature, leading to very large visual brightness changes. The total range of 5.2 - 12.4 is a variation of 750 times in brightness, from a naked eye star to one beyond the range of binoculars. The pulsations occur every 390 days but are not entirely regular. [2]
• 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.
Zeta Aquarii (ζ Aquarii, ζ Aqr) is the Bayer designation for a triple star system, [7] the central star of the "water jar" asterism [9] in the equatorial constellation of Aquarius. The combined apparent visual magnitude of this system is 3.65, [ 2 ] which is readily visible to the naked eye.
Kappa Aquarii (κ Aquarii, abbreviated Kappa Aqr, κ Aqr) is a probable binary star in the equatorial constellation of Aquarius. This system is visible to the naked eye, but it is faint at an apparent magnitude of 5.03. [2] Based upon parallax measurements made during the Hipparcos mission, it is around 214 light-years (66 parsecs) from the Sun ...
The star has 2.7 [7] times the mass of the Sun and double the Sun's radius. [8] It is radiating 63.5 [ 7 ] times the luminosity of the Sun from its photosphere at an effective temperature of 10,617 K. [ 7 ] When examined in the infrared band, it displays an excess emission that is a characteristic of stars with an orbiting debris disk .
The star is spinning relatively rapidly with a projected rotational velocity of 80 km s −1. [9] This value gives a lower bound on the actual azimuthal velocity along the star's equator. The outer atmosphere of Gamma Aquarii is radiating energy at an effective temperature of 10,500 K, [ 8 ] which is nearly double the temperature at the surface ...
The primary component is a red giant star with a stellar classification of M1.5 III. [3] The outer envelope of this evolved star has expanded to 35 times the size of the Sun. The star has the same mass as the Sun. [ 6 ] It is radiating 208 times the luminosity of the Sun at an effective temperature of 3,715 K, [ 6 ] giving it the reddish hue of ...