260310 NGC4631 Whale Galaxy - CDK17 native LRGBHLRGB image, ASI6200MM PRO, 6.1h integration time (794 of 1303 subs used), L 15s, RGB 30s, Ha 60s, good to medium seeing (1.4"-1.6"), two nights, 60% moon11.03.2026, 23:05:35