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U Geminorum

U Geminorum Facts

U Geminorum's Alternative Names

The Id of the star in the Henry Draper catalogue is HD64511.

U Geminorum has alternative name(s) :- U Gem.

BD number is the number that the star was filed under in the Durchmusterung or Bonner Durchmusterung, a star catalogue that was put together by the Bonn Observatory between 1859 to 1903. The star's BD Number is BD+22 1807.

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

Radial Velocity and Proper Motion of U Geminorum

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 -40.40 milliarcseconds/year towards the north and -27.36 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 42.00 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 of U Geminorum

U Geminorum Colour and Temperature

U Geminorum has a spectral type of sdBe+M4.5Ve C.

Distance to U Geminorum

The Parallax of the star is given as 10.71 which gives a calculated distance to U Geminorum of 304.48 light years from the Earth or 93.35 parsecs. It would take a spaceship travelling at the speed of light, 304.48 years to get there. We don't have the technology or spaceship that can carry people over that distance yet.

The star is roughly 19,254,685.49 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 U Geminorum Facts and Figures

Visual Facts


Primary / Proper / Traditional NameU Geminorum
Alternative NamesU Gem, HD 64511, BD+22 1807
Spectral TypesdBe+M4.5Ve C
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star TypeSubdwarf Star
GalaxyMilky Way
ConstellationGemini
Right Ascension (R.A.)07 55 05.2323858391
Distance from Earth10.71 Parallax (milliarcseconds)
 304.48 Light Years
 93.35 Parsecs
 19,254,685.49 Astronomical Units
Proper Motion Dec.-40.40 milliarcseconds/year
Proper Motion RA.-27.36 milliarcseconds/year
Radial Velocity42.00 km/s

Companions (Multi-Star and Exoplanets) Facts


Exoplanet CountNone/Unaware

Sources and Links


Sourcehttp://simbad.u-strasbg.fr/simbad/sim-id?Ident=hd%2064511

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