I was looking for SN AT2017iub, discovered on 12/6/17, that is 23" E of center. Although it was listed at mag 16.1, I failed to see it.

600/800mm - 24" (12/12/17): at 375x; fairly faint, relatively large, oval 5:4 SW-NE, 1.25'x1.0', broad mild concentration. Situated in a very starry field with a mag 14.6 star at the southwest edge [56" from center] and a mag 16.2 star is at the northeast end [45" from center]. A fairly bright double star is 2.8' NE. Located 14' W of mag 7 JD 33231.

Notes by Steve Gottlieb