The Rotten Fish Nebula is a faint dark nebula in Cepheus.
Hover over the picture for an annotated version
Date: 4 August 2024
FOV: cropped to 90' × 60'; LDN 1251 is about 36' long
Rotation: 0.063°
Telescope: Stellarvue SVX102T + SFFR.74 reducer (523mm f/5.25)
Guiding: ZWO ASI120MM mini mono guide camera,
Stellarvue F050G 50mm guide scope
Computer: ASIair pro Raspberry Pi
Mount: iOptron CEM40
Camera: ZWO ASI071MC Pro Cooled (-10°C) Color CMOS with gain 90
Pixel size: 4.78 μm
Resolution: 1.89 arcsec/pixel
Filter: Optolong UV-IR cut
Stacking: eighty-five 240 second frames using Pixinsight
Total Time: 5 hours 40 minutes
Calibration: 20 flats, 20 dark flats, and 20 darks
Processing: Pixinsight – SPCC, DBE, SPCC, BlurXT, NoiseXT → Linear
MStr, GHS, HST, PMath MStr + GHS + HST → Stars, Sat,
StarXT, MStr, GHS, HST, PMath MStr + GHS + HST → Starless, Sat,
PMath ~(~Stars*~Starless) → Blend, scale
Location: Cherry Springs State Park near Coudersport, PA
