• LBN 576, The Medulla Nebula, in Cassiopeia
    • LBN 576 in Cassiopeia
    Annotated image
  • The Medulla Nebula, LBN 576, or Abell 85, is a
  • very faint supernova remnant in Cassiopeia.
  • The heart of LBN 576 is a fast spinning
  • pulsar 10 kly from us.
  • Hover over the picture for an annotated version
  • Date:  29, 30, and 31 August 2025
  • FOV:  approximately 70' × 46' 40"; the angular size of LBN 576 is about 36'
  • 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 ASI6200MC Pro Cooled (-10°C) Color CMOS
  • Filter:  Optolong UV/IR 29 August, Optolong L-Ultimate 30 and 31 August
  • Frames:  29 August29 × 240 second frames, gain 100
  • 30 August94 × 240 second frames, gain 300
  • 31 August109 × 240 second frames, gain 300
  • Stacking:  two hundred and thirty-two 240 second frames using Pixinsight
  • Calibration:  20 dark, 20 flat, 20 dark flat each session
  • Total Time:  15 hours and 28 minutes
  • Processing:  gains stacked separately using PixInsight
  • Aug 29 – SPCC, DBE, SPCC BXT, NXT, GHS, HST, MStr,
  • PMath GHS + HST + MStr → UV/IR, Sat → Stars
  • Aug 30 and 31 – SPCC, DBE, SPCC BXT, NXT, GHS, HST, MStr,
  • PMath GHS + HST + MStr → Starless,
  • PixelMath ~(~Starless*~Stars), DynCrop/Scale
  • Location:  Darling Hill Observatory near Vesper, NY