A SHO image with RGB stars, shot over 3 nights in my Bortle 5 backyard. 18-20 Sept 22.
Reprocessed completely this time in PI.
Standard processing a for the SHO image,
BlurX, GHS, curves, StarX, NoiseX, and LRGBcombination, with some SCNR and curves work and sharpening.
Tried BIll B.'s SHOnormalization script v5 but ended up not using it this time.
Some effort to tame the Wolf-Rayet star region with a separate stretch and layering.
RGB stars processed with DBE, SPCC, BlurX, archsinh, curves, NoiseX, StarX, added back in.
Frames:
Baader Blue (CMOS-Optimized) 36 mm: 15×240″(1h) (gain: 100.00) 0°C
Baader Green (CMOS-Optimized) 36 mm: 15×240″(1h) (gain: 100.00) 0°C
Baader Red (CMOS-Optimized) 36 mm: 15×240″(1h) (gain: 100.00) 0°C
Chroma H-alpha 3nm Bandpass 36 mm: 76×300″(6h 20′) (gain: 100.00) 0°C
Chroma OIII 3nm Bandpass 36 mm: 81×300″(6h 45′) (gain: 100.00) 0°C
Chroma SII 3nm Bandpass 36 mm: 52×300″(4h 20′) (gain: 100.00) 0°C
Integration:20h 25′
Sh2-157, as designated in the Sharpless Catalog, is an emission nebula located in the constellation Cassiopeia approximately 8,000 light-years distant. It is only a short distance from the famous Bubble Nebula. The small bright nebular object at the base of the "blue pincher" is designated Sharpless 157a. It is a nebula surrounding the Wolf-Rayet star WR-157.
Thanks for looking.
Clear Skies!
-Pete
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