230820 SH2-137 Cepheus Nebulosity - RASA36 IHO.tiffIHO (Infrared-Halpha-OIII) image, ASI6200MM PRO, 9.1h integration time (selected from 12h in 3 nights), good to very good seeing (1.2"-1.5"). No moon.27.08.2023, 22:21:26