Nebulae The Butterfly Nebula Image October 2, 2020 admin Leave a comment The Butterfly Nebula on Oct 2, 2020. 247×15 sec, Gain 37, Offset 200, QHY183c at -15C, L-eNhance filter, Televue TV-85 at F/5.6. For a night with a full moon, this came out pretty good. Good transparency helped. Minimal processing with only color balance and saturation/hue adjustment tricks were used.