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Beta Monocerotis B (Companion Star) Facts

Beta Monocerotis B Facts

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 18.00 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 Beta Monocerotis B

Beta Monocerotis B Colour and Temperature

Beta Monocerotis B has a spectral type of B2Vn(e). This means the star is a blue main sequence star.

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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.-21.70 milliarcseconds/year
Proper Motion RA.-2.80 milliarcseconds/year
Radial Velocity18.00 km/s

Companions (Multi-Star and Exoplanets) Facts


Exoplanet CountNone/Unaware

Sources and Links


Sourcehttp://simbad.u-strasbg.fr/simbad/sim-id?Ident=hd%2045726

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