John Herschel discovered NGC 4184 = h3384 on 8 Mar 1837 and noted "Cluster class VI; vf, almost nebulous". There is no obvious clustering at his position on the DSS1.

Brian Skiff comments "Looks like an absorption hole, and no more ridiculous than the typical Ruprecht cluster. I make it just 0'.8 diameter at: 12 13 37 -62 43.2." Ruprecht gives a diameter of 5' to include a larger scattered group. RNGC classifies the number as nonexistent.

300/350mm - 14" (4/4/16 - Coonabarabran, 178x and 318x): about two dozen faint stars resolved in a 4' circle. Flanked by a mag 10 star ~4' SW and a mag 10 star ~4' NE. The richest part is a 30" clump on the east side with a half-dozen stars resolved at 318x. Located 16' NNE of mag 6.0 HD 106068.

Notes by Steve Gottlieb