NGC 591 NGC 431
And
☀12.9mag
Ø 96'' / 90''

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Heinrich d'Arrest discovered NGC 561 on 23 Aug 1862 with the 11-inch refractor at Copenhagen and logged "eF, 30" dia, R". His single position matches UGC 1048 = PGC 5489. WH and JH missed this galaxy although they both swept up many galaxies in the region.

400/500mm - 17.5" (12/23/89): fairly faint, fairly small, slightly elongated NW-SE, weak concentration. Located 15' ESE of mag 6.3 SAO 54705.

Notes by Steve Gottlieb