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U Cancri

U Cancri Facts

  • U Cancri is a pulsating star that can be located in the constellation of Cancer. The description is based on the spectral class.
  • U Cancri is not part of the constellation outline but is within the borders of the constellation.
  • Based on the spectral type (M2e D) of the star, the star's colour is red .

U Cancri's Alternative Names

The Id of the star in the Henry Draper catalogue is HD72863.

U Cancri has alternative name(s) :- U Cnc.

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 +19 2042.

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

Location of U Cancri

The location of the 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 U Cancri, the location is 08 35 46.2899830093 and +18 53 44.765098036 .

Radial Velocity and Proper Motion of U Cancri

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 -2.95 milliarcseconds/year towards the north and -3.12 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 72.00000 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 U Cancri

U Cancri Colour and Temperature

Based on the star's spectral type of M2e D , U Cancri's colour and type is red star. Based on the star's spectral, the stars temperature is between 2,400.00 and 3,700.00 degrees kelvin.

Variable Type of U Cancri

The star is a pulsating Omicron Ceti variable type which means that its size changes over time. The Variable Type is usually named after the first star of that type to be spotted.

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Additional U Cancri Facts and Figures

Visual Facts


Primary / Proper / Traditional NameU Cancri
Alternative NamesU Cnc, HD 72863, BD +19 2042
Spectral TypeM2e D
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star TypeStar
ColourRed
GalaxyMilky Way
ConstellationCancer
Right Ascension (R.A.)08 35 46.2899830093
Declination (Dec.)+18 53 44.765098036
Proper Motion Dec.-2.95400 milliarcseconds/year
Proper Motion RA.-3.12300 milliarcseconds/year
Radial Velocity72.00000 km/s
RedShift0.0002400000

Companions (Multi-Star and Exoplanets) Facts


Exoplanet CountNone/Unaware

Variable Star Details


Variable Star ClassPulsating
Variable Star TypeOmicron Ceti

Estimated Calculated Facts


Calculated Temperature Range2,400.00 - 3,700.00

Sources and Links


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

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