DeLisle Stewart discovered IC 4798 = DS 537 on a plate taken 13 Aug 1901 at Harvard's Arequipa Station in Peru. He noted "F, S, R, bM."

600/800mm - 25" (10/16/17 - OzSky): at 397x; fairly bright, moderately large, oval 4:3 WNW-ESE, ~60"x45", small bright core increases to the center. A mag 14.5-15 star is just off the west end [34" from center]. IC 4794 lies 8.5' WNW and IC 4803 is 17' ENE. Outlying member of ACO S805 = Pavo II cluster (1.8° NE of the core of the cluster).

Notes by Steve Gottlieb