Guillaume Bigourdan found IC 4424 = Big. 320 on 23 May 1892. His position matches CGCG 047-048 = PGC 51624. Lewis Swift discovered this galaxy the previous year on 28 Apr 1891 and described Sw. X-26 (later IC 1016) as "vF; vS; R; f[ollowing] of NGC 5619." His RA, though, was 1.3 minutes too large. Finally, RNGC identifies this galaxy as NGC 5619B, so it has 3 designations! IC 4424 is used in most modern sources due to the unambiguous position.

400/500mm - 17.5" (6/8/91): faint, small, elongated 2:1 NW-SE, weak concentration. Second brightest in trio with NGC 5619 3.5' WSW and NGC 5619B 2' S.

600/800mm - 24" (5/11/13): at 282x appeared fairly faint, fairly small, elongated 3:2 NW-SE, ~24"x14". A mag 16 star is just off the south side, 15" from center. Second brightest in the KTG 57 triplet, with NGC 5619 3.8' WSW and UGC 9258 2.6' SSW.

Notes by Steve Gottlieb