NGC 6633 · open cluster

NGC 6633

NGC 6633 is a large bright open cluster in the constellation Ophiuchus.

RA18h 27m 15sDec+06° 30' 29"

Image: BobFranke. CC BY-SA 4.0, via Wikimedia Commons.

Identity & coordinates

Identification

Primary designation: NGC 6633
All designations: NGC 6633
Object type: Open Cluster
Constellation: Ophiuchus
Best viewing: Summer

Coordinates & physical

Right ascension (J2000): 18h 27m 15s
Declination (J2000): +06° 30' 29"
Apparent magnitude (V): —
Distance: —

III

Visibility tonight

The science

NGC 6633 is a large bright open cluster in the constellation Ophiuchus. Discovered in 1745-46 by Philippe Loys de Chéseaux, it was independently rediscovered by Caroline Herschel in 1783 and included in her brother William's catalog as H VIII.72. Bright enough to be seen with the naked eye, the cluster is considered a fine object for binoculars or small telescopes.

Summary adapted from Wikipedia · CC-BY-SA-4.0