Discovered on July 24, 1778 by Charles Messier.
Sweep 477 (August 1, 1834).
RA 18h 44m 10.7s, NPD 120d 39m 39s (1830.0)
Glob. Cl.; B; p L; v l E; g b M; 2 1/2' diam; resolved into st 15 m, with a few outliers 14 m.
Globular Cluster; bright; pretty large; very little elongated; gradually brighter toward the middle; 2 1/2' diameter; resolved into stars of 15 m, with a few outliers of 14 m.
Sweep 619 (August 15, 1835).
RA 18h 44m 11.1s, NPD 120d 40m 54s (1830.0)
v v B; R; p s v m b M, to a large nipple; diam 2 1/2'; pos of a * 13m, almost involved = 147deg +/-
very very bright; round; pretty suddenly very much brighter toward the middle, to a large nipple; diameter 2 1/2'; position of a star of 13m, almost involved, at position angle 147deg +/-.
RA 18h 44m ..., NPD 120d 39m 30s (1830.0)
Obs in equatorial zone rev, July 16, 1836, on a neb. B, s b M; 90".
Observed in equatorial zone review, July 16, 1836, on a nebula. Bright, suddenly brighter toward the middle; 90" [diameter].
Last Modification: March 29,2005