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Alrakis (Mu Draconis A) Star Facts

Alrakis Facts

  • Alrakis is a main sequence star that can be located in the constellation of Draco. The description is based on the spectral class.
  • Alrakis is not part of the constellation outline but is within the borders of the constellation.
  • Based on the spectral type (F6V C) of the star, the star's colour is yellow to white .

Alrakis's Alternative Names

(Mu Draconis A) is the Bayer Classification for the star. The Bayer Classification was created by Johann Bayer in 1603. The brightest star in the constellation is normally given the Alpha designation, there are exceptions such as Pollux which is Beta Geminorum.

The Id of the star in the Yale Bright Star Catalogue is HR6370. The Id of the star in the Henry Draper catalogue is HD154906. The Gliese ID of the star is GJ 9584. The star was added to the Gliese catalogue in 1970 by Richard van der Riet Woolley hence the GJ prefix rather than GL prefix.Star Names.

Alrakis has alternative name(s) :- Mu Dra A.

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

Location of Alrakis

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 Alrakis, the location is 17h 05m 20.114 and +54° 28` 12.26 .

Radial Velocity and Proper Motion of Alrakis

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 88.70 milliarcseconds/year towards the north and -68.40 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 -15.40000 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 of Alrakis

Alrakis Colour and Temperature

Based on the star's spectral type of F6V C , Alrakis's colour and type is yellow to white main sequence star. Based on the star's spectral, the stars temperature is between 6,000.00 and 7,500.00 degrees kelvin.

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Additional Alrakis Facts and Figures

Visual Facts


Primary / Proper / Traditional Name Alrakis
Alternative NamesMu Draconis A, Mu Dra A, HD 154906, HR 6370, Gliese 9584
Spectral TypeF6V C
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star Type Main Sequence Dwarf Star
ColourYellow - White
GalaxyMilky Way
ConstellationDraco
Right Ascension (R.A.)17h 05m 20.114
Declination (Dec.)+54° 28` 12.26
Proper Motion Dec.88.70000 milliarcseconds/year
Proper Motion RA.-68.40000 milliarcseconds/year
Radial Velocity-15.40000 km/s

Companions (Multi-Star and Exoplanets) Facts


Exoplanet CountNone/Unaware

Estimated Calculated Facts


Calculated Temperature Range6,000.00 - 7,500.00

Location of Alrakis in Draco


Alrakis Location in Draco

The map was generated using Night Vision, an awesome free application by Brian Simpson.

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