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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: 7:43  
clear_day Transit: 11:47  
SunsetSet: 15:52 south
sleep NighttimeWhat's Visible Now?
All Constellations » Canis Major » 

Unurgunite - σ Canis Majoris (sigma Canis Majoris)

Altitude: 10.4°   Azimuth: 174.0°   Direction: South

Unurgunite, also designated as σ Canis Majoris (sigma Canis Majoris), is a variable and double supergiant star in the constellation of Canis Major.

Unurgunite visual magnitude is 3.47. Because of its moderate brightness, Unurgunite 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 Unurgunite:


Unurgunite - σ Canis Majoris (sigma Canis Majoris) is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 10.4°
Azimuth: 174.0°
Direction: South

Celestial coordinates and finder chart of Unurgunite

Unurgunite is situated south of the celestial equator, as such, it is more easily visible from the southern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of Unurgunite are provided in the following table:

07h 01m 43s
-27° 56’ 04”
Canis Major

The simplified sky map below shows the position of Unurgunite in the sky:

Finder chart Unurgunite - σ Canis Majoris (sigma Canis Majoris) star
Simplified finder chart for Unurgunite - σ Canis Majoris (sigma Canis Majoris).

Visibility of Unurgunite 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 Unurgunite - σ Canis Majoris (sigma Canis 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: 117.9°
Max altitude: 10.6°
Azimuth: 242.1°

Digitized Sky Survey image of Unurgunite

The image below is a photograph of Unurgunite 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 Unurgunite is -0.005 arcsec per year in Right Ascension and 0.005 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

Image of Unurgunite - σ Canis Majoris (sigma Canis Majoris) star
DSS2 image of Unurgunite. The red arrow shows the motion of Unurgunite during the next 100000 years (-8.33 arcmin in Right Ascension and 8.33 arcmin in declination);

Distance of Unurgunite from the Sun and relative movement

Unurgunite is distant 1,216.42 light years from the Sun and it is moving far from the Sun at the speed of 22 kilometers per second.

373.13 pc
1,216.42 ly
22 km/s
-0.005 arcsec/year
0.005 arcsec/year

Spectral properties of Unurgunite

Unurgunite belongs to spectral class K7 and has a luminosity class of I corresponding to a supergiant star.


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

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

Unurgunite star system properties

Unurgunite 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 Unurgunite double sysyem:

10 arcsec

Alternative designations of Unurgunite

σ Canis Majoris
(sigma Canis Majoris)
22 Canis Majoris