NGC/IC Project Restoration Effort

(This is a very very beta version)

NGC6645

 

Basic Information


Location and Magnitude


Right Ascension: 18:32:37.8
Declination: -16:53:2
Constellation: SGR
Visual Magnitude: 8.5

Historic Information


Discoverer: Herschel W.
Year of discovery: 1786
Discovery aperture: 18.7

Observational


Summary description: Cl, pL, vRi, pC, st 11…15
Sub-type: III1m

Steve's Notes

===== NGC 6645 17.5" (8/1/92): at 82x, this is a striking, rich cluster of 20' diameter! Quite rich in faint stars but a noticeable "hole" in center is devoid of stars. A rich knot of stars is on the south side of void and a close triple star is on the north side. A string of stars extends out of the cluster to the east. Three mag 7-8 stars are in the field to the NE. At 220x on the south side of the void are 8 stars in a "V" asterism. Roughly 75 stars are resolved within the central 10' diameter. A rich clump of 8 stars is just resolved at the south edge of the circular hole. 8": about 50 stars resolved, moderately large, unresolved haze, including close triple star, rich in faint stars, several dense patches.