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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: 7:49  
clear_day Transit: 11:49  
SunsetSet: 15:50 south
wb_twilight Astronomical TwilightWhat's Visible Now?
All Constellations » Canis Major » 

ο2 Canis Majoris (omicron2 Canis Majoris)

Altitude: -42.5°   Azimuth: 74.3°   Direction: East-North-East

ο2 Canis Majoris is a supergiant star in the constellation of Canis Major.

ο2 Canis Majoris visual magnitude is 3.02. Because of its moderate brightness, ο2 Canis 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 ο2 Canis Majoris:


ο2 Canis Majoris (omicron2 Canis Majoris) is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -42.5°
Azimuth: 74.3°
Direction: East-North-East

Celestial coordinates and finder chart of ο2 Canis Majoris

ο2 Canis Majoris is situated close to the celestial equator, as such, it is at least partly visible from both hemispheres in certain times of the year. Celestial coordinates for the J2000 equinox as well as galactic coordinates of ο2 Canis Majoris are provided in the following table:

07h 03m 01s
-23° 49’ 59”
Canis Major

The simplified sky map below shows the position of ο2 Canis Majoris in the sky:

Finder chart ο2 Canis Majoris (omicron2 Canis Majoris) star
Simplified finder chart for ο2 Canis Majoris (omicron2 Canis Majoris).

Visibility of ο2 Canis Majoris 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 ο2 Canis Majoris (omicron2 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: 113.8°
Max altitude: 14.7°
Azimuth: 246.2°

Digitized Sky Survey image of ο2 Canis Majoris

The image below is a photograph of ο2 Canis 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 ο2 Canis Majoris is -0.004 arcsec per year in Right Ascension and 0.003 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

Image of ο2 Canis Majoris (omicron2 Canis Majoris) star
DSS2 image of ο2 Canis Majoris. The red arrow shows the motion of ο2 Canis Majoris during the next 100000 years (-6.67 arcmin in Right Ascension and 5.00 arcmin in declination);

Distance of ο2 Canis Majoris from the Sun and relative movement

ο2 Canis Majoris is distant 2,566.93 light years from the Sun and it is moving far from the Sun at the speed of 48 kilometers per second.

787.40 pc
2,566.93 ly
48 km/s
-0.004 arcsec/year
0.003 arcsec/year

Spectral properties of ο2 Canis Majoris

ο2 Canis Majoris belongs to spectral class B3 and has a luminosity class of I corresponding to a supergiant star.


The red dot in the diagram below shows where ο2 Canis Majoris is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of ο2 Canis Majoris. Attribution: Richard Powell / CC BY-SA

Alternative designations of ο2 Canis Majoris

ο2 Canis Majoris
(omicron2 Canis Majoris)
24 Canis Majoris