Universe Guide

14 Aquarii - HD202466 - HIP105019

14 Aquarii is a red pulsating giant star that can be located in the constellation of Aquarius. HIP is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD. The Id of the star in the Gould Star Catalogue is . Stars in the southern hemisphere are more likely to have a Gould Id than the northern hemisphere. For example, there are no Gould classified stars in Ursa Major. 14 Aquarii has alternative name(s), 14 Aquarii.

Location of 14 Aquarii

The location of the star in the galaxy is determined by the Right Ascension (R.A.) and Declination (Dec.), these are equivalent to the Longitude and Latitude on the Earth. The Right Ascension is how far expressed in time (hh:mm:ss) the star is from celestial equator. The Declination is how up or down compared to the celestial equator and is expressed in degrees. For 14 Aquarii, the location is 21h 16m 17.78 and -09 d 12 ` 52.8 .

Physical Properties/View of 14 Aquarii

14 Aquarii has a spectral type of M4III:. This means the star is (M) red coloured (III) giant. 14 Aquarii lies at a distance of 1,832.38 light years away from our Sun and our planet Earth or to put it another way, 561.68 parsecs away from the Sun.

14 Aquarii has an apparent magnitude of 6.45 which is how bright we see the star from Earth. Apparent Magnitude is also known as Visual Magnitude. 14 Aquarii has an absolute magnitude of -2.30 which is the apparent magnitude of an object if it were 32.6 light years away or 10 parsecs from Earth. Magnitude, whether it be apparent/visual or absolute magnitude is measured by a number, the smaller the number, the brighter the Star is. Our own Sun is the brightest star and therefore has the lowest of all magnitudes, -26.74. A faint star will have a high number. The star's temperature has been calculated at being about 3000 Kelvin. (Based on the b-v value of 1.61 and the lookup on SDSS.)

14 Aquarii Radius has been calculated as being 99.70 times bigger than the Sun. The Sun's radius is 695,800km, therefore the star's radius is an estimated 69,369,394.58. km.

Variable Type of 14 Aquarii

The star is a pulsating Semiregular s, which are giants or supergiants of intermediate and late spectral variable type which means that its size changes over time. The Variable Type is usually named after the first star of that type to be spotted. 14 Aquarii brightness ranges from a magnitude of 7.000 to a magnitude of 6.000 over its variable period. The smaller the magnitude, the brighter the star. Its variable/pulsating period lasts for 5.0 days (variability).

Source of Information

The source of the information came from Simbad, the Hipparcos data library based at the University at Strasbourg, France. Hipparcos was a E.S.A. satellite operation launched in 1989 for four years.

14 Aquarii Facts

Traditional Name14 Aquarii
Short NameIW Aqr
Alternative Name(s)14 Aquarii
Hipparcos Library I.D.105019
Gould I.D.54
Henry Draper Designation202466
Celestial TypeStar
Absolute Magnitude-2.30
Apparent Magnitude6.45
Right Ascension (R.A.)21h 16m 17.78
Declination (Dec.)-09 d 12 ` 52.8
Distance from the Sun / Earth1,832.38 Light Years
Spectral TypeM4III:
Colour (M) red
Star Type (III) giant.
Variable Star ClassPulsating
Variable Star TypeSemiregular s, which are giants or supergiants of intermediate and late spectral
Mean Variability Period in Days5.000
Variable Magnitude Range (Brighter - Dimmer)6.000 - 7.000
Radius (x the Sun)99.70
Calculated Temperature Range2,400.00 - 3,700.00

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