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VZ Canis Majoris, HIP36125

VZ Canis Majoris is a blue to white pulsating luminous giant star that can be located in the constellation of Canis Major. The description is based on the spectral class. The star can not be seen by the naked eye, you need a telescope to see it.

VZ Canis Majoris's Alternative Names

HIP36125 is the reference name for the star in the Hipparcos Star Catalogue.

VZ Canis Majoris has alternative name(s) :- , VZ CMa.

More details on star alternative names can be found at Star Names .

Location of VZ Canis Majoris

The location of the star in the night sky 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 along the celestial equator. If the R.A. is positive then its eastwards. The Declination is how far north or south the star is compared to the celestial equator and is expressed in degrees. For VZ Canis Majoris, the location is 07h 26m 28.25 and -25° 55` 36.4 .

Proper Motion of VZ Canis Majoris

All stars like planets orbit round a central spot, in the case of planets, its the central star such as the Sun. In the case of a star, its the galactic centre. The constellations that we see today will be different than they were 50,000 years ago or 50,000 years from now. Proper Motion details the movements of these stars and are measured in milliarcseconds. The star is moving 2.09 ± 1.12 miliarcseconds/year towards the north and -1.88 ± 1.58 miliarcseconds/year east if we saw them in the horizon. . When the value is negative then the star and the Sun are getting closer to one another, likewise, a positive number means that two stars are moving away. Its nothing to fear as the stars are so far apart, they won't collide in our life-time, if ever.

Physical Properties (Colour, Temperature) of VZ Canis Majoris

VZ Canis Majoris has a spectral type of F5II(R). This means the star is a blue to white luminous giant star. The star has a B-V Colour Index of 0.87 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 5,262 Kelvin.

VZ Canis Majoris Radius has been calculated as being 9.43 times bigger than the Sun.The Sun's radius is 695,800km, therefore the star's radius is an estimated 6,562,697.89.km. If you need the diameter of the star, you just need to multiple the radius by 2. However with the 2007 release of updated Hipparcos files, the radius is now calculated at being round 5.53. The figure is derived at by using the formula from SDSS and has been known to produce widely incorrect figures.

VZ Canis Majoris Apparent and Absolute Magnitudes

VZ Canis Majoris has an apparent magnitude of 9.39 which is how bright we see the star from Earth. Apparent Magnitude is also known as Visual Magnitude. If you used the 1997 Parallax value, you would get an absolute magnitude of 0.38 If you used the 2007 Parallax value, you would get an absolute magnitude of 1.54. 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.

Distance to VZ Canis Majoris

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 1.58 which gave the calculated distance to VZ Canis Majoris as 2064.32 light years away from Earth or 632.91 parsecs. It would take a spaceship travelling at the speed of light, 2064.32 years to get there. We don't have the technology or spaceship that can carry people over that distance yet.

In 2007, Hipparcos data was revised with a new parallax of 2.69 which put VZ Canis Majoris at a distance of 1212.50 light years or 371.75 parsecs. It should not be taken as though the star is moving closer or further away from us. It is purely that the distance was recalculated.

Variable Type of VZ Canis Majoris

The star is a pulsating Delta Cepheid 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. VZ Canis Majoris brightness ranges from a magnitude of 9.748 to a magnitude of 9.330 over its variable period. The smaller the magnitude, the brighter the star. Its variable/pulsating period lasts for 3.1 days (variability).

Source of Information

The source of the information if it has a Hip I.D. is 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. The items in red are values that I've calculated so they could well be wrong. Information regarding Metallicity and/or Mass is from the E.U. Exoplanets. The information was obtained as of 12th Feb 2017.

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VZ Canis Majoris Facts

Visual Facts


Primary / Proper / Traditional NameVZ Canis Majoris
Alternative NamesHIP 36125, VZ CMa
Spectral TypeF5II(R)
Multiple Star SystemNo / Unknown
Star TypeLuminous Giant Star
Colour blue to white
GalaxyMilky Way
ConstellationCanis Major
Absolute Magnitude0.38 / 1.54
Visual / Apparent Magnitude9.39
Naked Eye VisibleRequires a 7x50 Binoculars - Magnitudes
Right Ascension (R.A.)07h 26m 28.25
Declination (Dec.)-25° 55` 36.4
Galactic Latitude-4.44 degrees
Galactic Longitude239.86 degrees
1997 Distance from Earth1.58 Parallax (milliarcseconds)
 2064.32 Light Years
 632.91 Parsecs
2007 Distance from Earth2.69 Parallax (milliarcseconds)
 1212.50 Light Years
 371.75 Parsecs
Proper Motion Dec.2.09 ± 1.12 milliarcseconds/year
Proper Motion RA.-1.88 ± 1.58 milliarcseconds/year
B-V Index0.87

Companions (Multi-Star and Exoplanets) Facts


Exoplanet CountNone/Unaware

Variable Star Details


Variable Star ClassPulsating
Variable Star TypeDelta Cepheid
Mean Variability Period in Days3.126
Variable Magnitude Range (Brighter - Dimmer)9.330 - 9.748

Estimated Facts


Calculated Effective Temperature5,262 Kelvin

Sources and Links


SIMBAD SourceLink

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