R.J. Mitchell discovered NGC 3160 (along with NGC 3152) on 27 Mar 1854 using LdR's 72". He noted "about 4' following NGC 3152] is a small lenticular ray, elongated sp nf." His offset and description matches UGC 5513.

300/350mm - 13.1" (2/25/84): extremely faint, small. Located 5' N of NGC 3158.

400/500mm - 17.5" (3/23/85): faint, small, edge-on NW-SE. Member of NGC 3158 group with NGC 3158 4.7' S.

Notes by Steve Gottlieb