William Herschel discovered NGC 4175 = H III-360 = h1124 on 11 Apr 1785 (sweep 396). See notes under NGC 4169.

300/350mm - 13.1" (4/12/86): faint, edge-on NW-SE, bright core, similar in size to NGC 4173 but fainter. Last of four in the NGC 4169 group = HCG 61 with NGC 4169 2.9' WNW.

400/500mm - 18" (6/17/06): fairly faint, moderately large, edge-on 5:1 NW-SE, 1.3'x0.25', broad weak concentration to a slightly brighter bulging core. Fades at the tips. Second of two edge-ons in HCG 61 = "The Box" with NGC 4173 3' NW.

600/800mm - 24" (5/22/17): at 282x; moderately bright, fairly large, thin edge-on 5:1 NW-SE. 1.25'x0.25'. Contains a brighter elongated core but not strongly concentrated and no nucleus. NGC 4174, 1.5' SW, is orientated exactly perpendiculat to NGC 4175.

900/1200mm - 48" (4/20/17): fairly bright, fairly large, edge-on 5:1 NW-SE, ~1.5'x0.3', contains a large, brighter bulging core. The extensions taper at the ends giving a spindle appearance. This galaxy is parallel to NGC 4173 and perpendicular to NGC 4174 to the southwest.

Notes by Steve Gottlieb