• NGC 4236, a Barred Spiral Galaxy in Draco
    • NGC 4236 in Draco
    Annotated image
  • NGC 4236 is a nearly edge-on barred spiral galaxy in Draco.
  • Considered a challenging visual object, this large but faint
  • galaxy is readily observed using astrophotography.
  • Hover over the image for an annotated view.
  • Date:  13 May 2023 (50 frames) and 14 May 2023 (55 frames)
  • FOV:  Cropped to 68' × 45'; the angular size of NGC 4236 is about 22 × 7'
  • Telescope:  Stellarvue SVX102T + SFFX-1 flattener (714mm, f/7)
  • Guiding:  ZWO ASI120MM mini mono guide camera,
  • Stellarvue F050G 50mm guide scope
  • Computer:  ASIair pro Raspberry Pi
  • Mount:  ZWO AM5
  • Camera:  ZWO ASI071MC Pro Cooled (-10°C) Color CMOS with gain 90
  • Pixel size:  4.78 μm
  • Resolution:  1.337 arcsec/pixel
  • Filter:  Baader Light Pollution Moonglow filter with IR cut
  • Stacking:  One-hundred-five 240 second frames using Pixinsight
  • Total Time:  7 hours
  • Processing:  Pixinsight – SPCC, DBE, SPCC, BlurXT, NoiseXT, DynCrop,
  • HST, GHS, MStr, PMath MStr + GHS + HST, HDR5,
  • StarXT, Bill Blanshan Star Reduction, Sat, Scale
  • Location:  Darling Hill Observatory near Vesper, NY