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A Complete Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 7:38  
clear_day Transit: 11:46  
SunsetSet: 15:54 south
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All Constellations » Ursa Major » 

ω Ursae Majoris (omega Ursae Majoris)

Altitude: 5.0°   Azimuth: 6.9°   Direction: North

ω Ursae Majoris is a main-sequence star in the constellation of Ursa Major.

ω Ursae Majoris visual magnitude is 4.71. Because of its moderate brightness, ω Ursae Majoris should be easily visible from locations with dark skyes, while it can be barely visible, or not visible at all, from skyes affected by light pollution.

The table below summarizes the key facts about ω Ursae Majoris:


ω Ursae Majoris (omega Ursae Majoris) is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 5.0°
Azimuth: 6.9°
Direction: North

Celestial coordinates and finder chart of ω Ursae Majoris

ω Ursae Majoris is situated north of the celestial equator, as such, it is more easily visible from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of ω Ursae Majoris are provided in the following table:

10h 53m 58s
+43° 11’ 23”
Ursa Major

The simplified sky map below shows the position of ω Ursae Majoris in the sky:

Finder chart ω Ursae Majoris (omega Ursae Majoris) star
Simplified finder chart for ω Ursae Majoris (omega Ursae Majoris).

Visibility of ω Ursae Majoris from your location

Location: Greenwich, United Kingdom edit_location_alt
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

ω Ursae Majoris (omega Ursae Majoris) is circumpolar and transits at 06:22 UTC (altitude: 81.7°)

Digitized Sky Survey image of ω Ursae Majoris

The image below is a photograph of ω Ursae Majoris from the Digitized Sky Survey 2 (DSS2 - see the credits section) taken in the red channel. The area of sky represented in the image is 0.5x0.5 degrees (30x30 arcmins). The proper motion of ω Ursae Majoris is 0.045 arcsec per year in Right Ascension and -0.021 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of ω Ursae Majoris (omega Ursae Majoris) star
DSS2 image of ω Ursae Majoris. The red arrow shows the motion of ω Ursae Majoris during the next 10000 years (7.50 arcmin in Right Ascension and -3.50 arcmin in declination);

Distance of ω Ursae Majoris from the Sun and relative movement

ω Ursae Majoris is distant 266.78 light years from the Sun and it is moving towards the Sun at the speed of 17 kilometers per second.

81.83 pc
266.78 ly
-17 km/s
0.045 arcsec/year
-0.021 arcsec/year

Spectral properties of ω Ursae Majoris

ω Ursae Majoris belongs to spectral class A1 and has a luminosity class of V corresponding to a main-sequence star.


The red dot in the diagram below shows where ω Ursae Majoris is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of ω Ursae Majoris. Attribution: Richard Powell / CC BY-SA

Alternative designations of ω Ursae Majoris

ω Ursae Majoris
(omega Ursae Majoris)
45 Ursae Majoris