Discovered by Charles Messier on March 18, 1781.
Sweep 191 (May 2, 1829)
RA 12h 22m 12.3s, NPD 76d 41' 35" (1830.0).
vB; vL; R
Very bright; very large; round.
Sweep 192 (May 4, 1829)
RA 12h 22m 12.7s, NPD 76d 40' 4" (1830.0).
pB; L; R
Pretty bright; large; round.
Sweep 245 (March 23, 1830)
RA 12h 22m 17.7s, NPD 76d 40' 58" (1830.0).
vB; vL; R; psmbM; r; 3' diam.
Very bright; very large; round; pretty suddenly much brighter toward the
middle; mottled; 3' diameter.
Sweep 19 (March 10, 1826)
RA 12h 22m 17.7s, NPD 76d 41' 34" (1830.0).
vB; R; bM. (Taken past merid; PD too great)
Very bright; round; brighter toward the middle. (Taken past meridian
[transit]; [N]PD too great)
Last Modification: February 10, 2004