Édouard Stephan discovered NGC 5358 = St XI-21 on 23 Jun 1880 with the 31-inch silvered reflector at Marseille. Hermann Vogel found the galaxy again on 3 Jun 1883 with the 27-inch Grubb refractor at Vienna. Although WH and JH observed the 4 brighter galaxies to the west, they both missed this fainter galaxy.

300/350mm - 13.1" (5/26/84): faintest member of the NGC 5353 group = HCG 68. Very faint, very small, very elongated NW-SE. A close double mag 13 double star at 8" separation is 1.1' SSE. Located 6.4' E of NGC 5353 and 4.7' SE of NGC 5355.

600/800mm - 24" (7/1/16): faintest member of the HCG 68 quintet. At 260x; fairly faint, fairly small, elongated 2:1, 25"x12", very small bright core, stellar nucleus. A pair of mag 12.5/13 stars at ~8" separation is 1.1' SSE and nearly collinear with the galaxy.

24" (6/8/13): faintest and last member of HCG 68. Appeared fairly faint to moderately bright, fairly small, very elongated 3:1 NW-SE, 40"x15", small brighter nucleus. Located 6.4' E of NGC 5353.

Notes by Steve Gottlieb