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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: 7:48  
clear_day Transit: 11:49  
SunsetSet: 15:50 south
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All Constellations » Ursa Major » 

Alula Australis - ξ Ursae Majoris (xi Ursae Majoris)

Altitude: 61.4°   Azimuth: 236.7°   Direction: West-South-West

Alula Australis, also designated as ξ Ursae Majoris (xi Ursae Majoris), is a variable and multiple hypergiant star in the constellation of Ursa Major.

Alula Australis visual magnitude is 4.41. Because of its moderate brightness, Alula Australis 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 Alula Australis:


Alula Australis - ξ Ursae Majoris (xi Ursae Majoris) is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 61.4°
Azimuth: 236.7°
Direction: West-South-West

Celestial coordinates and finder chart of Alula Australis

Alula Australis 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 Alula Australis are provided in the following table:

11h 18m 11s
+31° 31’ 45”
Ursa Major

The simplified sky map below shows the position of Alula Australis in the sky:

Finder chart Alula Australis - ξ Ursae Majoris (xi Ursae Majoris) star
Simplified finder chart for Alula Australis - ξ Ursae Majoris (xi Ursae Majoris).

Visibility of Alula Australis from your location

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

Today's Alula Australis - ξ Ursae Majoris (xi Ursae Majoris) rise, transit and set times from Greenwich, United Kingdom edit_location_alt are the following (all times relative to the local timezone Europe/London):

Azimuth: 58.5°
Max altitude: 70.0°
Azimuth: 301.5°

Digitized Sky Survey image of Alula Australis

The image below is a photograph of Alula Australis 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 Alula Australis is -0.43 arcsec per year in Right Ascension and -0.586 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of Alula Australis - ξ Ursae Majoris (xi Ursae Majoris) star
DSS2 image of Alula Australis. The red arrow shows the motion of Alula Australis during the next 1000 years (-7.17 arcmin in Right Ascension and -9.77 arcmin in declination);

Distance of Alula Australis from the Sun and relative movement

Alula Australis is distant 33.96 light years from the Sun and it is moving towards the Sun at the speed of 16 kilometers per second.

10.42 pc
33.96 ly
-16 km/s
-0.43 arcsec/year
-0.586 arcsec/year

Spectral properties of Alula Australis

Alula Australis belongs to spectral class G0 and has a luminosity class of V corresponding to a hypergiant star.


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

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

Alula Australis star system properties

Alula Australis is a visual double star which can be observed with the help of small or medium telescopes. The table below shows key information about the Alula Australis double sysyem:

3.1 arcsec

Alternative designations of Alula Australis

Alula Australis
ξ Ursae Majoris
(xi Ursae Majoris)
53 Ursae Majoris
Gl 423 A