Universe Guide

12 Canis Majoris - HD49333 - HIP32504

12 Canis Majoris is a blue rotating giant star that can be located in the constellation of CanisMajor. 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 Canis Majoris has alternative name(s), 12 Canis Majoris.

Location of 12 Canis Majoris

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 Canis Majoris, the location is 06h 47m 01.49 and -21 d 00 ` 55.5 .

Physical Properties/View of 12 Canis Majoris

12 Canis Majoris has a spectral type of B7II/III. This means the star is (B) blue coloured (III) giant. 12 Canis Majoris lies at a distance of 668.37 light years away from our Sun and our planet Earth or to put it another way, 204.81 parsecs away from the Sun.

12 Canis Majoris has an apparent magnitude of 6.07 which is how bright we see the star from Earth. Apparent Magnitude is also known as Visual Magnitude. 12 Canis Majoris has an absolute magnitude of -0.49 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 stars temperature has been calculated at between 10000 and 30000 based on the Class Type and lookup at Wikipedia-Stellar Classification

Variable Type of 12 Canis Majoris

The star is a rotating Alpha2 Canum Venaticorum 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. 12 Canis Majoris brightness ranges from a magnitude of 6.000 to a magnitude of 6.000 over its variable period. The smaller the magnitude, the brighter the star. Its variable/pulsating period lasts for 2.0 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.

12 Canis Majoris Facts


Traditional Name12 Canis Majoris
Short NameHK CMa
Alternative Name(s)12 Canis Majoris
Hipparcos Library I.D.32504
Henry Draper Designation49333
Celestial TypeStar
Absolute Magnitude-0.49
Apparent Magnitude6.07
Right Ascension (R.A.)06h 47m 01.49
Declination (Dec.)-21 d 00 ` 55.5
Distance from the Sun / Earth668.37 Light Years
Spectral TypeB7II/III
Colour (B) blue
Star Type (III) giant.
Variable Star ClassRotating
Variable Star TypeAlpha2 Canum Venaticorum
Mean Variability Period in Days2.000
Variable Magnitude Range (Brighter - Dimmer)6.000 - 6.000
Calculated Temperature Range10,000.00 - 30,000.00


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