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CM Draconis

CM Draconis Facts

CM Draconis's Alternative Names

CM Draconis has alternative name(s) :- CM Dra.

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

Location of CM Draconis

The location of the main sequence 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 CM Draconis, the location is 16 34 20.3299130309 and +57 09 44.365524588 .

Radial Velocity and Proper Motion of CM Draconis

Proper Motion

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 1,181.21 milliarcseconds/year towards the north and -1,113.61 milliarcseconds/year east if we saw them in the horizon.

Radial Velocity

The Radial Velocity, that is the speed at which the star is moving away/towards the Sun is -118.24 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) of CM Draconis

CM Draconis Colour and Temperature

CM Draconis has a spectral type of M4.5V C. This means the star is a red main sequence star.

Distance to CM Draconis

The Parallax of the star is given as 67.34 which gives a calculated distance to CM Draconis of 48.44 light years from the Earth or 14.85 parsecs. It would take a spaceship travelling at the speed of light, 48.44 years to get there. We don't have the technology or spaceship that can carry people over that distance yet.

The star is roughly 3,063,011.03 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 CM Draconis

The star is a rotating BY Draconis 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.

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Additional CM Draconis Facts and Figures

Visual Facts


Primary / Proper / Traditional NameCM Draconis
Alternative NamesCM Dra
Spectral TypeM4.5V C
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star Type Main Sequence Dwarf Star
ColourRed
GalaxyMilky Way
ConstellationDraco
Right Ascension (R.A.)16 34 20.3299130309
Declination (Dec.)+57 09 44.365524588
Distance from Earth67.34 Parallax (milliarcseconds)
 48.44 Light Years
 14.85 Parsecs
 3,063,011.03 Astronomical Units
Proper Motion Dec.1181.21 milliarcseconds/year
Proper Motion RA.-1113.61 milliarcseconds/year
Radial Velocity-118.24 km/s

Companions (Multi-Star and Exoplanets) Facts


Exoplanet CountNone/Unaware

Variable Star Details


Variable Star ClassRotating
Variable Star TypeBY Draconis

Sources and Links


Sourcehttp://simbad.u-strasbg.fr/simbad/sim-id?Ident=cm%20draconis

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