Alt. Designations: NGC 6494
Object Type: Open Cluster
Constellation: Sagittarius
Distance: 2.15 kly
Right Ascension: 17h 57m 04.0s
Declination: -18° 59´ 00"
Visual Magnitude: 5.5
Apparent Dimension: 25.0´ Dia.
Best Month To View: Jun

M23 is a loose galactic cluster of stars found in the constellation Sagittarius. This cluster lies about 2,150 light-years from Earth and contains about 150 stars of magnitude 10 and fainter. It stretches over a distance of about 20 light-years in diameter and has a total visual magnitude of 5.5. M23 can easily be resolved with binoculars and its large size makes it a prime candidate for small, wide-field telescopes.