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GO Ursae Majoris

GO Ursae Majoris Facts

GO Ursae Majoris's Alternative Names

HIP50167 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD88530.

GO Ursae Majoris has alternative name(s) :- , GO 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+60 1245.

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

Location of GO Ursae Majoris

The location of the variable 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 GO Ursae Majoris, the location is 10h 14m 24.65 and +59° 23` 59.1 .

Physical Properties (Colour, Temperature) of GO Ursae Majoris

GO Ursae Majoris has a spectral type of M3. This means the star is a red variable star. The star has a B-V Colour Index of 1.57 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 3,854 Kelvin.

GO Ursae Majoris Radius has been calculated as being 402.85 times bigger than the Sun.The Sun's radius is 695,800km, therefore the star's radius is an estimated 280,302,801.36.km. If you need the diameter of the star, you just need to multiple the radius by 2. The figure is derived at by using the formula from SDSS and has been known to produce widely incorrect figures.

GO Ursae Majoris Apparent and Absolute Magnitudes

GO Ursae Majoris has an apparent magnitude of 7.56 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 -6.42 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 GO Ursae Majoris

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 0.16 which gave the calculated distance to GO Ursae Majoris as 20385.21 light years away from Earth or 6250 parsecs. It would take a spaceship travelling at the speed of light, 20385.21 years to get there. We don't have the technology or spaceship that can carry people over that distance yet.

Variable Type of GO Ursae Majoris

The star is a eruptive Irregular 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. GO Ursae Majoris brightness ranges from a magnitude of 7.681 to a magnitude of 7.416 over its variable period. The smaller the magnitude, the brighter the star. Its variable/pulsating period lasts for 0.2 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 GO Ursae Majoris Facts and Figures

Visual Facts


Primary / Proper / Traditional NameGO Ursae Majoris
Alternative NamesHD 88530, HIP 50167, BD+60 1245, GO UMa
Spectral TypeM3
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star TypeVariable Star
ColourRed
GalaxyMilky Way
ConstellationUrsa Major
Absolute Magnitude -6.42
Visual / Apparent Magnitude7.56
Naked Eye VisibleRequires a 7x50 Binoculars - Magnitudes
Right Ascension (R.A.)10h 14m 24.65
Declination (Dec.)+59° 23` 59.1
Galactic Latitude48.01 degrees
Galactic Longitude151.72 degrees
Distance from Earth0.16 Parallax (milliarcseconds)
 20385.21 Light Years
 6250 Parsecs
 1,289,146,056.15 Astronomical Units
B-V Index1.57
Radial Velocity7.17 ± 0.30 km/s

Companions (Multi-Star and Exoplanets) Facts


Exoplanet CountNone/Unaware

Variable Star Details


Variable Star ClassEruptive
Variable Star TypeIrregular
Mean Variability Period in Days0.216
Variable Magnitude Range (Brighter - Dimmer)7.416 - 7.681

Estimated Calculated Facts


Radius (x the Sun)402.85
Effective Temperature3,854 Kelvin

Sources and Links


SIMBAD SourceLink

Related Stars


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