Discovered on March 20, 1781 by Pierre Méchain.
Sweep 338 (April 4, 1831)
RA 10h 34m 60.6s, NPD 77d 24' 43" (1830.0)
B; R; p g b M; r; 150" diam
Bright; round; pretty gradually brighter toward the middle; mottled; 150"
diameter.
Sweep 240 (March, 1830)
RA 10h 34m 62.2s:, NPD 77d 24' 4" (1830.0)
Just seen through a thick cloud
Sweep 243 (March 24, 1830)
..., NPD 77d 26' +/- (1830.0)
F; L; g m b M; r; 3' diam. Approx. place.
Faint; large; gradually much brighter toward the middle; mottled;
3' diameter. Approximate place [only].
Sweep 2 (April 10, 1825)
Viewed; v F; E; r; 30 or 40" (probably cloudy); a star precedes. A very
doubtful obs.
Viewed; very faint; extended [elongated]; mottled; 30 or 40" [diameter]
(probably cloudy); a star precedes. A very doubtful observation.
Last Modification: May 21, 2006