NGC 6633

Alt. Designations: NGC 6633
Object Type: open cluster
Constellation: Ophiuchus
Distance: 1.04 kly
Right Ascension: 18h 27m 15.1s
Declination: +06° 30´ 30"
Visual Magnitude: 4.6
Apparent Dimension: 20.0´ Dia.
Best Month To View: Jun

NGC 6633 is an open cluster, in the constellation Ophiuchus, that is nearly as large as the full moon, and contains 30 stars which make it shine at a total magnitude of 4.6; the brightest star is of mag 7.6. Its age was estimated at 660 million years.