We use cookies to deliver essential features and to measure their performance. By using this site you accept our Privacy Policies.
Help keep this site free and ads-free: donate now!
public LocationGreenwich, United Kingdom
TimezoneEurope/London
Sunrise: 4:42 
Transit: 12:59 
Sunset: 21:17
sunny   (Daytime)   What's Visible Now?

Dubhe - α Ursae Majoris (alpha Ursae Majoris)

Above the horizon.  Circumpolar today
Altitude: 51.3°   Azimuth: 46.0°   Direction: North-East

Dubhe, also designated as α Ursae Majoris (alpha Ursae Majoris), is a variable and double hypergiant star of spectral class K0 in the constellation of Ursa Major.

Dubhe visual magnitude is 1.79, making it the 33th brightest star in the sky. Because of its brightness, Dubhe is clearly visible to the naked eye when observed from locations with dark skies, and should be also quite easily visible from light polluted areas.

Celestial coordinates and finder chart of Dubhe

Finder chart Dubhe - α Ursae Majoris (alpha Ursae Majoris) star
Simplified finder chart for Dubhe - α Ursae Majoris (alpha Ursae Majoris).

Dubhe is situated close to the northern celestial pole and, as such, it is visible for most part of the year from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of Dubhe are provided in the following table:

11h 03m 43s
+61° 45’ 02”
142.85°
51.01°
Ursa Major
Image of Dubhe - α Ursae Majoris (alpha Ursae Majoris) star
DSS2 image of Dubhe. The red arrow shows the motion of Dubhe during the next 1000 years (-1.98 arcmin in Right Ascension and -1.12 arcmin in declination);

Key facts about Dubhe

1.79
Hypergiant

and has a luminosity class of III corresponding to a hypergiant star.

-1.10
K0III
4581K

The red dot in the diagram below shows where Dubhe is situated in the Hertzsprung–Russell diagram.

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

Dubhe star system properties

Dubhe is a visual double star which can be observed only with the help of very large telescopes. The table below shows key information about the Dubhe double sysyem:

1.79
4.79
3
0.5 arcsec

Distance of Dubhe from the Sun and relative movement

Dubhe is distant 123.58 light years from the Sun and it is moving towards the Sun at the speed of 9 kilometers per second.

37.91 pc
123.58 ly
-9 km/s
-0.119 arcsec/year
-0.067 arcsec/year

Alternative designations of Dubhe

Dubhe
α Ursae Majoris
(alpha Ursae Majoris)
50 Ursae Majoris
SAO15384
SAO15384

Visibility of Dubhe from your location

Dubhe - α Ursae Majoris (alpha Ursae Majoris) is circumpolar and transits at 17:13 UTC (altitude: 79.7°)