New Image: Sh2-91 in HaRGB

[Stuart Heggie]

https://www.astrofoto.ca/stuartheggie/ccd_photos/Sh2-91_HaRGB_AP155_G4_Aug2025_v2.html

This target is sometimes called The Little Veil and is indeed a supernova remnant. It is INSANELY faint. 

PixInsight:
RGB: Gradient Removal, SPCC, BlurX, NoiseX, Curves, HT, StarReduction. Save as TIFF
H-Alpha: Gradient Removal, BlurX, NoiseX, StarX, Curves, HT.  Save as TIFF

Photoshop:
RGB split into channels; Starless Ha added to Red at 100% and Blue at 20% using Screen. Merge Channels. Some tweaks. Noise reduction. Save-for-Web

I will add OIII if I can get some clear mostly moonless nights this week. Otherwise next new moon I'll come back to it.

Stuart Heggie

https://www.stuartheggie.com/f783431253