Lawrence Parsons discovered NGC 4000 on 25 Apr 1878 during one of the six Birr Castle observations of the cluster. Parsons placed this nebula at 100.5" separation in PA 283.9° (WNW) with respect to mag 8 star HD 103913 and described it as "vF, vS, lE ns, gbM." The micrometric offset points directly to UGC 6949.

400/500mm - 17.5" (3/19/88): very faint, fairly small, very elongated N-S. Located 1.6' WNW of mag 7.8 SAO 82077. Located in the center of the NGC 4007 group with NGC 4007 3.2' ESE.

600/800mm - 24" (3/22/14): faint, fairly small, very thin edge-on, 0.5'x0.1', even surface brightness. Situated 1.7' WNW of mag 8 HD 103913. NGC 4005 is symmetrically placed on the opposite side of the star.

Notes by Steve Gottlieb