Universe Guide

12 Cassiopeiae - HD2011 - HIP1960

12 Cassiopeiae is a blue giant star that can be located in the constellation of Cassiopeia. 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. 12 Cassiopeiae has alternative name(s), 12 Cassiopeiae.

Location of 12 Cassiopeiae

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 12 Cassiopeiae, the location is 00h 24m 47.49 and +61 d 49 ` 51.8 .

Physical Properties/View of 12 Cassiopeiae

12 Cassiopeiae has a spectral type of B9III. This means the star is (B) blue coloured (III) giant. 12 Cassiopeiae lies at a distance of 763.85 light years away from our Sun and our planet Earth or to put it another way, 233.93 parsecs away from the Sun.

12 Cassiopeiae has an apparent magnitude of 5.38 which is how bright we see the star from Earth. Apparent Magnitude is also known as Visual Magnitude. 12 Cassiopeiae has an absolute magnitude of -1.47 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 9500 Kelvin. (Based on the b-v value of 0 and the lookup on SDSS.)

12 Cassiopeiae Radius has been calculated as being 6.78 times bigger than the Sun. The Sun's radius is 695,800km, therefore the star's radius is an estimated 4,720,141.58. km.

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.

12 Cassiopeiae Facts


Traditional Name12 Cassiopeiae
Alternative Name(s)12 Cassiopeiae
Hipparcos Library I.D.1960
Henry Draper Designation2011
Celestial TypeStar
Absolute Magnitude-1.47
Apparent Magnitude5.38
Right Ascension (R.A.)00h 24m 47.49
Declination (Dec.)+61 d 49 ` 51.8
Distance from the Sun / Earth763.85 Light Years
Spectral TypeB9III
Colour (B) blue
Star Type (III) giant.
Variable Star ClassConstant, non-variable
Radius (x the Sun)6.78
Calculated Temperature Range10,000.00 - 30,000.00


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