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HomeFactsConstellationsCanis Minor

S Canis Minoris, HD59950, HIP36675

S Canis Minoris is a red pulsating star that can be located in the constellation of CanisMinor. The star can not be seen by the naked eye, you need a telescope to see it.

HIP36675 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD59950.

S Canis Minoris has alternative name(s), S CMi.

Location of S Canis Minoris

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 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 S Canis Minoris, the location is 07h 32m 43.08 and +08d 19` 05.3 .

Proper Motion of S 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 -15.71 ± 0.89 miliarcseconds/year towards the north and -6.04 ± 1.30 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 us is 68.00000 km/s with an error of about 4.80 km/s .

Physical Properties (Colour, Temperature, Radius) of S Canis Minoris

S Canis Minoris has a spectral type of M6e-M8e. This means the star is a red star. The star has a B-V Colour Index of 1.5 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 4,014 Kelvin. The figure is derived at by using the formula from SDSS and has been known to produce widely incorrect figures.

S Canis Minoris Apparent and Absolute Magnitudes

S Canis Minoris has an apparent magnitude of 10.74 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 If you used the 2007 Parallax value, you would get an absolute magnitude of 1.36. 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 S Canis Minoris

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as -4.20 which gave the calculated distance to S Canis Minoris as -776.58 light years away from Earth or -238.10 parsecs. It would take a spaceship travelling at the speed of light, -776.58 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 1.33 which put S Canis Minoris at a distance of 2452.36 light years or 751.88 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 S Canis Minoris

The star is a pulsating Omicron Ceti 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. S Canis Minoris brightness ranges from a magnitude of 10.358 to a magnitude of 6.512 over its variable period. The smaller the magnitude, the brighter the star. Its variable/pulsating period lasts for 326.3 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.

S Canis Minoris Facts

Alternative Names

Traditional/Proper NameS Canis Minoris
Short NameS CMi
Hipparcos Library I.D.36675
Bonner DurchmusterungBD+08 1800
Henry Draper Designation59950

Visual Facts

Star Type star
ConstellationCanis Minor
Visual / Apparent Magnitude10.74
Naked Eye VisibleRequires a 4.5 - 6 Inch Telescope - Magnitudes
Right Ascension (R.A.)07h 32m 43.08
Declination (Dec.)+08d 19` 05.3
Galactic Latitude12.93 degrees
Galactic Longitude210.11 degrees
1997 Distance from Earth-4.20 Parallax (milliarcseconds)
 -776.58 Light Years
 -238.10 Parsecs
2007 Revised Distance from Earth1.33 Parallax (milliarcseconds)
 2452.36 Light Years
 751.88 Parsecs
Proper Motion Dec.-15.71 ± 0.89 milliarcseconds/year
Proper Motion RA.-6.04 ± 1.30 milliarcseconds/year
B-V Index1.50
Radial Velocity68.00 ± 4.80 km/s
Spectral TypeM6e-M8e
Colour(M) Red

Variable Star Details

Variable Star ClassPulsating
Variable Star TypeOmicron Ceti
Mean Variability Period in Days326.300
Variable Magnitude Range (Brighter - Dimmer)6.512 - 10.358

Estimated Facts

Calculated Effective Temperature4,014 Kelvin

Sources and Links

SIMBAD SourceLink

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