· · · ·

Sagittarius Dwarf Galaxy

Sagittarius Dwarf Spheroidal Galaxy, Sgr dSph, Sgr DEG

Proper NamesSagittarius Dwarf Galaxy (abbreviated to Sgr dSph, Sgr DEG)
Messier NumberNone
NGC/IC NumberNone
Other DesignationsPGC 4689212
Right Ascension18h 55m 3s
Declination-30° 28' 42"
Distancec.65,200 light years
c.20,000 parsecs
MagnitudeApparent: +4.5
Absolute: -11.2
Mean DiameterApparent: 7° 30'
Actual: c.6,000 light years
Hubble TypeE-S0 Elliptical/Lenticular
Optimum VisibilityJuly
NotesThis dwarf galaxy is known in full as the Sagittarius Dwarf Spheroidal Galaxy (or Dwarf Elliptical Galaxy), to avoid confusion with the Sagittarius Dwarf Irregular Galaxy, another much more distant dwarf galaxy that lies somewhat to the north within Sagittarius.

One of a number of small galaxies known to be associated with the Milky Way spiral. The Sagittarius Dwarf Galaxy is roughly spheroid in shape, approximately six thousand light years in diameter. It is unusual in that appears to be in to process of 'colliding' with our own Galaxy. This event is taking place at the base of the Outer Arm, on the other side of the Galaxy from our Sun.


Related Entries