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AD Canis Minoris

AD Canis Minoris Facts

AD Canis Minoris's Alternative Names

HIP38473 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD64191.

AD Canis Minoris has alternative name(s) :- AD CMi, AD CMi.

BD number is the number that the star was filed under in the Durchmusterung or Bonner Durchmusterung, a star catalogue that was put together by the Bonn Observatory between 1859 to 1903. The star's BD Number is BD+01 1932.

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

Location of AD Canis Minoris

The location of the giant 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 object is compared to the celestial equator and is expressed in degrees. For AD Canis Minoris, the location is 07h 52m 47.19 and +01° 35` 50.5 .

Radial Velocity and Proper Motion of AD Canis Minoris

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 0.64 ± 1.11 miliarcseconds/year towards the north and -10.51 ± 1.46 miliarcseconds/year east if we saw them in the horizon.

The Radial Velocity, that is the speed at which the star is moving away/towards the Sun is 34.50 km/s with an error of about 999.00 km/s . 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 AD Canis Minoris

AD Canis Minoris has a spectral type of F0IIIvar. This means the star is a blue to white giant star. The star has a B-V Colour Index of 0.25 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 7,483 Kelvin.

AD Canis Minoris Radius has been calculated as being 0.91 times bigger than the Sun.The Sun's radius is 695,800km, therefore the star's radius is an estimated 632,699.89.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 1.24. The figure is derived at by using the formula from SDSS and has been known to produce widely incorrect figures.

AD Canis Minoris Apparent and Absolute Magnitudes

AD Canis Minoris has an apparent magnitude of 9.31 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 3.93 If you used the 2007 Parallax value, you would get an absolute magnitude of 3.26. 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 AD Canis Minoris

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 8.40 which gave the calculated distance to AD Canis Minoris as 388.29 light years away from Earth or 119.05 parsecs. It would take a spaceship travelling at the speed of light, 388.29 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 6.17 which put AD Canis Minoris at a distance of 528.63 light years or 162.07 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.

Using the 2007 distance, the star is roughly 33,429,104.21 Astronomical Units from the Earth/Sun give or take a few. An Astronomical Unit is the distance between Earth and the Sun. The number of A.U. is the number of times that the star is from the Earth compared to the Sun.

Variable Type of AD Canis Minoris

The star is a pulsating Phenomenologically, 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. AD Canis Minoris brightness ranges from a magnitude of 9.596 to a magnitude of 9.284 over its variable period. The smaller the magnitude, the brighter the star. Its variable/pulsating period lasts for 0.1 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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Additional AD Canis Minoris Facts and Figures

Visual Facts


Primary / Proper / Traditional NameAD Canis Minoris
Alternative NamesAD CMi, HD 64191, HIP 38473, BD+01 1932, AD CMi
Spectral TypeF0IIIvar
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star TypeGiant Star
ColourYellow - White
GalaxyMilky Way
ConstellationCanis Minor
Absolute Magnitude 3.93 / 3.26
Visual / Apparent Magnitude9.31
Naked Eye VisibleRequires a 7x50 Binoculars - Magnitudes
Right Ascension (R.A.)07h 52m 47.19
Declination (Dec.)+01° 35` 50.5
Galactic Latitude14.36 degrees
Galactic Longitude218.60 degrees
1997 Distance from Earth8.40 Parallax (milliarcseconds)
 388.29 Light Years
 119.05 Parsecs
2007 Distance from Earth6.17 Parallax (milliarcseconds)
 528.63 Light Years
 162.07 Parsecs
 33,429,104.21 Astronomical Units
Proper Motion Dec.0.64 ± 1.11 milliarcseconds/year
Proper Motion RA.-10.51 ± 1.46 milliarcseconds/year
B-V Index0.25
Radial Velocity34.50 ± 999.00 km/s

Companions (Multi-Star and Exoplanets) Facts


Exoplanet CountNone/Unaware

Variable Star Details


Variable Star ClassPulsating
Variable Star TypePhenomenologically,
Mean Variability Period in Days0.123
Variable Magnitude Range (Brighter - Dimmer)9.284 - 9.596

Estimated Calculated Facts


Radius (x the Sun)1.24
Effective Temperature7,483 Kelvin

Sources and Links


SIMBAD SourceLink

Related Stars


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