Williamina Fleming discovered IC 4846 = Fleming 100 on a Harvard photographic plate taken in 1901.

Based on Crossley photographs at Lick, Curtis (1918) reported "indistinguishable from a star on the Crossley negatives, but shown to have a minute disk visually in the 36-inch refractor."

300/350mm - 13.1" (7/85): bright stellar planetary, appears as a mag 11.5-12 "star" which blinks well with an OIII filter at 79x. Located in a rich star field 20' S of mag 7.3 SAO 143200.

600/800mm - 24" (9/10/15): bright greenish (stellar) planetary at 200x. The color gives it away but easily verified by blinking with an NPB filter. It clearly has a "soft" appearance at 260x and a very small disc is evident at 375x, just a couple of arcseconds in size. Forms the northwest vertex of a triangle with a mag 11 star 2.9' S and a similar star 3.6' ESE.

Notes by Steve Gottlieb