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BB Canis Minoris

BB Canis Minoris Facts

BB Canis Minoris's Alternative Names

HIP38361 is the reference name for the star in the Hipparcos Star Catalogue.

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

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

Location of BB Canis Minoris

The location of the variable 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 BB Canis Minoris, the location is 07h 51m 24.55 and +04° 54` 39.3 .

Physical Properties (Colour, Temperature) of BB Canis Minoris

BB Canis Minoris Colour and Temperature

BB Canis Minoris has a spectral type of A5. This means the star is a blue variable star. The star has a B-V Colour Index of 0.34 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 6,614 Kelvin.

BB Canis Minoris Radius

Radius has been calculated as being 21.88 times bigger than the Sun. The Sun's radius is 695,800km, therefore the star's radius is an estimated 15,222,409.61.km. If you need the diameter of the star, you just need to multiple the radius by 2. The figure is derived at by using the formula from SDSS and has been known to produce widely incorrect figures.

BB Canis Minoris Apparent and Absolute Magnitudes

BB Canis Minoris has an apparent magnitude of 10.32 which is how bright we see the star from Earth. Apparent Magnitude is also known as Visual Magnitude. Using the supplied Parallax value, you would get an absolute magnitude of -2.44 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 BB Canis Minoris

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 0.28 which gave the calculated distance to BB Canis Minoris as 11648.69 light years away from Earth or 3571.43 parsecs. It would take a spaceship travelling at the speed of light, 11648.69 years to get there. We don't have the technology or spaceship that can carry people over that distance yet.

Variable Type of BB Canis Minoris

The star is a pulsating RR Lyrae type with n 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. BB Canis Minoris brightness ranges from a magnitude of 10.629 to a magnitude of 10.182 over its variable period. The smaller the magnitude, the brighter the star. Its variable/pulsating period lasts for 0.4 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 BB Canis Minoris Facts and Figures

Visual Facts


Primary / Proper / Traditional NameBB Canis Minoris
Alternative NamesBB CMi, HIP 38361, BB CMi
Spectral TypeA5
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star TypeVariable Star
ColourBlue
GalaxyMilky Way
ConstellationCanis Minor
Absolute Magnitude -2.44
Visual / Apparent Magnitude10.32
Naked Eye VisibleRequires a 4.5 - 6 Inch Telescope - Magnitudes
Right Ascension (R.A.)07h 51m 24.55
Declination (Dec.)+04° 54` 39.3
Galactic Latitude15.57 degrees
Galactic Longitude215.39 degrees
Distance from Earth0.28 Parallax (milliarcseconds)
 11648.69 Light Years
 3571.43 Parsecs
 736,655,183.89 Astronomical Units
B-V Index0.34

Companions (Multi-Star and Exoplanets) Facts


Exoplanet CountNone/Unaware

Variable Star Details


Variable Star ClassPulsating
Variable Star TypeRR Lyrae type with n
Mean Variability Period in Days0.396
Variable Magnitude Range (Brighter - Dimmer)10.182 - 10.629

Estimated Calculated Facts


Radius (x the Sun)21.88
Effective Temperature6,614 Kelvin

Sources and Links


SIMBAD SourceLink

Related Stars


Comments and Questions

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