• IC 434 and NGC 2024 in Orion
    • Horsehead Nebula
    Annotated image
  • IC 434, the Horsehead Nebula, and
  • NGC 2024, the Flame Nebula, in Orion.
  • Hover over the image for an annotated view.
  • Date:  19 September and 16 October 2025
  • FOV:  cropped to 108' × 72'
  • the angular size of NGC 2024 is about 30'
  • Rotation:  −90.567°
  • Telescope:  Celestron C14 SCT (3910mm, f/11)
  • Starizona HyperStar (731.47mm, f/1.9)
  • Guiding:  ZWO183 MM pro
  • Computer:  ASIair plus 256GB
  • Mount:  iOptron CEM120
  • Camera:  ZWO ASI2600 MC Duo Cooled (0°C) Color CMOS gain 100
  • Pixel size:  3.76 μm
  • Resolution:  1.060 arcsec/pixel
  • Filter:  Optolong UV/IR cut
  • Frames:  sixteen 300 second subs 19 September 2025
  • fifty-three 300 second subs 16 October 2025
  • Total Time:  5 hours and 45 minutes
  • Calibration:  20 flats, 20 dark flats, and 20 darks per session
  • Processing:  Pixinsight – MGC, DBE, SPCC, BlurXT, NoiseXT → Linear
  • MStr, GHS, HST, MAS, PMath MStr + GHS + HST + MAS → Stars
  • Linear, StarXT, MAS → Starless,
  • HDRMST969PhLm, Sat,
  • PMath ~(~Starless*~Stars) → Blend, scale
  • Location:  Darling Hill Observatory near Vesper, NY