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Beta Monocerotis B (Companion Star) Facts

Beta Monocerotis B Facts

  • Beta Monocerotis B is a main sequence star that can be located in the constellation of Monoceros. The description is based on the spectral class.
  • Beta Monocerotis B is not part of the constellation outline but is within the borders of the constellation.
  • Based on the spectral type (B2Vn(e)) of the star, the star's colour is blue .

Location of Beta Monocerotis B

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 Beta Monocerotis B, the location is 06 28 49.4266 and -07 02 03.835 .

Radial Velocity and Proper Motion of Beta Monocerotis B

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 -21.70 milliarcseconds/year towards the north and -2.80 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 18.00000 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 Beta Monocerotis B

Beta Monocerotis B Temperature and Colour

Based on the star's spectral type of B2Vn(e) , Beta Monocerotis B'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 Beta Monocerotis B Facts and Figures

Visual Facts


Primary / Proper / Traditional NameBeta Monocerotis B
Spectral TypeB2Vn(e)
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star Type Main Sequence Dwarf Star
ColourBlue
GalaxyMilky Way
ConstellationMonoceros
Right Ascension (R.A.)06 28 49.4266
Declination (Dec.)-07 02 03.835
Proper Motion Dec.-21.70000 milliarcseconds/year
Proper Motion RA.-2.80000 milliarcseconds/year
Radial Velocity18.00000 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%2045726

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