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public LocationGreenwich, UK
Sunrise: 5:07 
Transit: 13:06 
Sunset: 21:04
sunny   (Daytime)   What's Visible Now?
All Constellations » Canis Major » 

ο1 Canis Majoris (omicron1 Canis Majoris)

Above the horizon.  Rise: 8:23 | Tran: 12:04 | Set: 15:45
Alt: 13.94°   Az: 187.91°   Direction: South

ο1 Canis Majoris is a variable supergiant star of spectral class K2 in the constellation of Canis Major.

ο1 Canis Majoris visual magnitude is 3.87. Because of its moderate brightness, ο1 Canis Majoris is easily visible to the naked eye from locations with dark skies, while it might be barely visible, or not visible at all, from light-polluted skies.

Image of ο1 Canis Majoris (omicron1 Canis Majoris) star
DSS2 image of ο1 Canis Majoris. The red arrow shows the motion of ο1 Canis Majoris during the next 10000 years (-1.33 arcmin in Right Ascension and 2.17 arcmin in declination);

Celestial Coordinates


06h 55m 09s
-24° 12’ 58”
00h 33m 41s
07h 28m 50s


06h 54m 07s
-24° 11’ 02”

Galactic Coordinates


Finder Chart

Finder chart ο1 Canis Majoris (omicron1 Canis Majoris) star
Simplified finder chart for ο1 Canis Majoris (omicron1 Canis Majoris).

Magnitude, Color, Spectral Class



The red dot in the diagram below shows where ο1 Canis Majoris is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of ο1 Canis Majoris. Attribution: Richard Powell / CC BY-SA

Distance, Radial Speed, Proper Motion

ο1 Canis Majoris is distant 1,975.76 light years from the Sun and it is moving far from the Sun at the speed of 36 kilometers per second.

36 km/s
-0.008 arcsec/y

Alternative Designations

ο1 Canis Majoris
(omicron1 Canis Majoris)
16 Canis Majoris

Visibility from Your Location

Today's ο1 Canis Majoris (omicron1 Canis Majoris) rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 114.2°
Max altitude: 14.3°
Azimuth: 245.8°