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Alpha02 Crucis

Alpha02 Crucis Facts

  • Alpha02 Crucis is a main sequence star that can be located in the constellation of Crux. The description is based on the spectral class.
  • Alpha02 Crucis is not part of the constellation outline but is within the borders of the constellation.
  • Based on the spectral type (B1V E) of the star, the star's colour is blue .

Alpha02 Crucis 's Alternative Names

The Id of the star in the Yale Bright Star Catalogue is HR4731. The Id of the star in the Henry Draper catalogue is HD108249.

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

Location of Alpha02 Crucis

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 Alpha02 Crucis , the location is 12 26 36.442 and -63 05 58.28 .

Radial Velocity and Proper Motion of Alpha02 Crucis

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 -7.70 milliarcseconds/year towards the north and -42.50 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 -0.60000 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 Alpha02 Crucis

Alpha02 Crucis Temperature and Colour

Based on the star's spectral type of B1V E , Alpha02 Crucis 's colour and type is blue main sequence star. Based on the star's spectral, the stars temperature is between 10,000.00 and 30,000.00 degrees kelvin.

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Additional Alpha02 Crucis Facts and Figures

Visual Facts


Primary / Proper / Traditional NameAlpha02 Crucis
Alternative NamesHD 108249, HR 4731
Spectral TypeB1V E
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star Type Main Sequence Dwarf Star
ColourBlue
GalaxyMilky Way
ConstellationCrux
Right Ascension (R.A.)12 26 36.442
Declination (Dec.)-63 05 58.28
Proper Motion Dec.-7.70000 milliarcseconds/year
Proper Motion RA.-42.50000 milliarcseconds/year
Radial Velocity-0.60000 km/s

Companions (Multi-Star and Exoplanets) Facts


Exoplanet CountNone/Unaware

Estimated Calculated Facts


Calculated Temperature Range10,000.00 - 30,000.00

Sources and Links


Sourcehttp://simbad.u-strasbg.fr/simbad/sim-id?Ident=hd%20108249

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