· · · ·

Canis Major Dwarf Galaxy

Canis Major Overdensity, CMa Dwarf, CMa Overdensity

Proper NamesCanis Major Dwarf Galaxy, Canis Major Overdensity (abbreviated to CMa Dwarf or Overdensity)
Messier NumberNone
NGC/IC NumberNone
Other DesignationsPGC 5065047
ConstellationCanis Major
Right Ascension7h 12m 35s
Declination-27° 40' 0"
Distancec.25,000 light years
c.7,700 parsecs
MagnitudeApparent: +23.3
Absolute: -14.5
Mean DiameterApparent: 12'
Actual: c.5,000 light years
Hubble TypeDwarf Irregular
Optimum VisibilityJanuary
NotesA small irregular galaxy thought to orbit the Milky Way, trailing stars behind it to create a structure known as the Monoceros Ring. It should be noted that there is some dispute over the nature of the galaxy, but if current analysis proves to be correct, then this is the closest known external galaxy to the Solar System.

The Canis Major Dwarf Galaxy is not directly visible here, but this image does show the approximate location and extent of the dwarf galaxy within southern Canis Major. Imagery provided by Aladin sky atlas


Related Entries