LDN 1622, The Boogeyman Nebula, is a dark
nebula found in the constellation Orion.
Hover over the picture for an annotated version
Date: 1 and 16 October 2025
FOV: Approximately 4° 20' × 2° 53'
Telescope: Askar FRA300 pro (300mm f/5 Petzval)
Guiding: ZWO ASI120MM mini mono guide camera,
SVBony SV165 Mini 40mm f/4 guide scope
Computer: ASIair pro Raspberry Pi
Mount: ZWO AM5 mount
Camera: ZWO ASI6200MC Pro Cooled (-10°C) Color CMOS
Pixel size: 3.76 μm
Resolution: 2.593 arcsec/pixel
Frames:1 October 202532 × 300 seconds × 100 gain
16 October 202532 × 300 seconds × 100 gain
26 October 202555 × 300 seconds × 100 gain
Filter: Optolong L-Ultimate 1 Oct, UV/IR cut 16 and 26 Oct
Stacking: one hundrend and nineteen 300 second frames using Pixinsight
Calibration: 20 darks, 20 flats, and 20 dark flats per session
Total Time: 9 hours 55 minutes
Processing: Pixinsight – SPPC, DBE, SPCC, BlurXT, NoiseXT, DynCrop → Linear
MStr, GHS, HST, PMath MStr + GHS + HST → Stars, Sat,
StarXT, MStr, GHS, HST, PMath MStr + GHS + HST → Starless,
HDR64PhLm, Sat, PMath ~(~Stars*~Starless) → Blend, scale
Location: Darling Hill Observatory near Vesper, NY
