71 / 86
Nine hours of H-alpha (in 1 hr unbinned subs) have been added to the previous image of NGC 55 (L 28, RGB 4 hrs/channel, in 30 min unbinned subs). H-alpha was mapped to red, the H-alpha and LRGB images averaged, and the red channel adjusted to restore colour balance to the H-alpha poor regions of the galaxy.
- No Comments