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V Ursae Majoris, HIP44846

Primary Facts on V Ursae Majoris

  • V Ursae Majoris's star type is pulsating variable star that can be located in the constellation of Ursa Major. The description is based on the spectral class.
  • V Ursae Majoris is not part of the constellation outline but is within the borders of the constellation.
  • Based on the spectral type (M5.5) of the star, the star's colour is red .
  • The star can not be seen by the naked eye, you need a telescope to see it.
  • The star is calculated at being about -1105.64 light years away from us.

V Ursae Majoris's Alternative Names

HIP44846 is the reference name for the star in the Hipparcos Star Catalogue.

V Ursae Majoris has alternative name(s) :- , V UMa.

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+51 1483a.

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

Location of V Ursae Majoris

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 star is compared to the celestial equator and is expressed in degrees. For V Ursae Majoris, the location is 09h 08m 14.41 and +51° 06` 49.4 .

Physical Properties (Colour, Temperature) of V Ursae Majoris

V Ursae Majoris has a spectral type of M5.5. This means the star is a red variable star. The star has a B-V Colour Index of 1.42 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 4,172 Kelvin.

V Ursae Majoris Apparent and Absolute Magnitudes

V Ursae Majoris has an apparent magnitude of 10.61 which is how bright we see the star from Earth. Apparent Magnitude is also known as Visual Magnitude. Using the supplied Parallax value, you would get an absolute magnitude of Magnitude, whether it be apparent/visual or absolute magnitude is measured by a number, the smaller the number, the brighter the Star is. Our own Sun is the brightest star and therefore has the lowest of all magnitudes, -26.74. A faint star will have a high number.

Distance to V Ursae Majoris

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as -2.95 which gave the calculated distance to V Ursae Majoris as -1105.64 light years away from Earth or -338.98 parsecs. It would take a spaceship travelling at the speed of light, -1105.64 years to get there. We don't have the technology or spaceship that can carry people over that distance yet.

Variable Type of V Ursae Majoris

The star is a pulsating Semiregular late- (M 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. V Ursae Majoris brightness ranges from a magnitude of 10.768 to a magnitude of 9.968 over its variable period. The smaller the magnitude, the brighter the star. Its variable/pulsating period lasts for 0.7 days (variability).

Source of Information

The source of the information if it has a Hip I.D. is from Simbad, the Hipparcos data library based at the University at Strasbourg, France. Hipparcos was a E.S.A. satellite operation launched in 1989 for four years. The items in red are values that I've calculated so they could well be wrong. Information regarding Metallicity and/or Mass is from the E.U. Exoplanets. The information was obtained as of 12th Feb 2017.

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Additional V Ursae Majoris Facts and Figures

Visual Facts


Primary / Proper / Traditional NameV Ursae Majoris
Alternative NamesHIP 44846, BD+51 1483a, V UMa
Spectral TypeM5.5
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star TypeVariable Star
Colour red
GalaxyMilky Way
ConstellationUrsa Major
Visual / Apparent Magnitude10.61
Naked Eye VisibleRequires a 4.5 - 6 Inch Telescope - Magnitudes
Right Ascension (R.A.)09h 08m 14.41
Declination (Dec.)+51° 06` 49.4
Galactic Latitude41.99 degrees
Galactic Longitude167.24 degrees
Distance from Earth-2.95 Parallax (milliarcseconds)
 -1105.64 Light Years
 -338.98 Parsecs
 -69,919,156.82 Astronomical Units
B-V Index1.42
Radial Velocity-35.00 ± 4.80 km/s

Companions (Multi-Star and Exoplanets) Facts


Exoplanet CountNone/Unaware

Variable Star Details


Variable Star ClassPulsating
Variable Star TypeSemiregular late- (M
Mean Variability Period in Days0.665
Variable Magnitude Range (Brighter - Dimmer)9.968 - 10.768

Estimated Facts


Calculated Effective Temperature4,172 Kelvin

Sources and Links


SIMBAD SourceLink

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