Fig. 57: Open cluster NGC 7789 in constellation Cassiopeia with dark clouds LDN 1253 and LDN 1257. Bottom left star β Cassiopeia, close to it reflection nebula vdB 1 and Herbig Ae/Be star LkHA 198. Top left H-II region Sh 2-168. Exposure time 45 x 300s, ISO 400, Nikon D850, Nikkor AF-S 300 mm 1:2.8D, ZWO AM3N, Brugg AG, 7. September 2026
