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36 Ursae Majoris B (Companion Star) Facts

36 Ursae Majoris B Facts

36 Ursae Majoris B's Alternative Names

The Id of the star in the Henry Draper catalogue is HD237903.

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

Location of 36 Ursae Majoris 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 36 Ursae Majoris B, the location is 10 30 25.3090612677 and +55 59 56.858942068 .

Radial Velocity and Proper Motion of 36 Ursae Majoris 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 -32.27 milliarcseconds/year towards the north and -182.55 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 8.78 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 36 Ursae Majoris B

36 Ursae Majoris B Colour and Temperature

36 Ursae Majoris B has a spectral type of K7Ve C. This means the star is a orange to red main sequence star.

Distance to 36 Ursae Majoris B

The Parallax of the star is given as 77.40 which gives a calculated distance to 36 Ursae Majoris B of 42.14 light years from the Earth or 12.92 parsecs. It would take a spaceship travelling at the speed of light, 42.14 years to get there. We don't have the technology or spaceship that can carry people over that distance yet.

The star is roughly 2,664,922.73 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.

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Additional 36 Ursae Majoris B Facts and Figures

Visual Facts


Primary / Proper / Traditional Name36 Ursae Majoris B
Alternative NamesHD 237903
Spectral TypeK7Ve C
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star Type Main Sequence Dwarf Star
ColourOrange to Red
GalaxyMilky Way
ConstellationUrsa Major
Right Ascension (R.A.)10 30 25.3090612677
Declination (Dec.)+55 59 56.858942068
Distance from Earth77.40 Parallax (milliarcseconds)
 42.14 Light Years
 12.92 Parsecs
 2,664,922.73 Astronomical Units
Proper Motion Dec.-32.27 milliarcseconds/year
Proper Motion RA.-182.55 milliarcseconds/year
Radial Velocity8.78 km/s

Companions (Multi-Star and Exoplanets) Facts


Exoplanet CountNone/Unaware

Sources and Links


Sourcehttp://simbad.u-strasbg.fr/simbad/sim-id?Ident=hd237903

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