Caldwell21 Caldwell 21 Dwarf Galaxy HaLRGB image, ASI6200MM PRO, 3.2h integration time, 2 nights. 1322 Subs aquired, 712 useable, 399 selected by quality. Half moon, small clouds, dry, good to excellent seeing (1.1" - 1.4"). Planewave CDK17 2939mm f/6.8 · LRGB · ZWO ASI6200MM Pro (mono cooled) · 3h 12min · 384 subs · Freyung Private Observatory, Germany · 12h 28m 11.3s / +44° 05' 38.4" · 2025-05-07
