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public LocationGreenwich, UK
Sunrise: 4:42 
Transit: 13:00 
Sunset: 21:18
sunny   (Daytime)   What's Visible Now?

Aludra - η Canis Majoris (eta Canis Majoris)

Below the horizon.  Rise: 11:19 | Tran: 14:19 | Set: 17:18
Altitude: -33.0°   Azimuth: 97.0°   Direction: East

Aludra, also designated as η Canis Majoris (eta Canis Majoris), is a double supergiant star of spectral class B5 in the constellation of Canis Major.

Aludra visual magnitude is 2.45, making it the 87th brightest star in the sky. Because of its brightness, Aludra 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 Aludra

Finder chart Aludra - η Canis Majoris (eta Canis Majoris) star
Simplified finder chart for Aludra - η Canis Majoris (eta Canis Majoris).

Aludra 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 Aludra are provided in the following table:

07h 24m 05s
-29° 18’ 11”
Canis Major
Image of Aludra - η Canis Majoris (eta Canis Majoris) star
DSS2 image of Aludra. The red arrow shows the motion of Aludra during the next 100000 years (-6.67 arcmin in Right Ascension and 8.33 arcmin in declination);

Key facts about Aludra


and has a luminosity class of I corresponding to a supergiant star.


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

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

Aludra star system properties

Aludra 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 Aludra double sysyem:

178.7 arcsec

Distance of Aludra from the Sun and relative movement

Aludra is distant 3,196.08 light years from the Sun and it is moving far from the Sun at the speed of 41 kilometers per second.

980.39 pc
3,196.08 ly
41 km/s
-0.004 arcsec/year
0.005 arcsec/year

Alternative designations of Aludra

η Canis Majoris
(eta Canis Majoris)
31 Canis Majoris

Visibility of Aludra from your location

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

Azimuth: 119.3°
Max altitude: 9.2°
Azimuth: 240.7°