• NGC 2359 in Canis Major, Thor's Helmet
    • NGC2359 Thor's Helmet
    Annotated image
  • NGC 2359 or Thor's Helmet is an emission nebula in Canis Major.
  • Extreme solar winds from WR 7, HIP35378, form Thor's Helmet.
  • Hover over the image for an annotated view.
  • Date:  25 January, 2025 and 4 March, 2022
  • FOV:  cropped to 60' × 40'
  • Rotation:  −90.011°
  • Session I:  4 March 2022 data by Robert Ostrander
  • 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:  iOptron CEM40
  • Camera:  ZWO ASI071MC Pro Cooled (-10°C) Color CMOS with gain 240
  • Filter:  Optolong L-eNhance dual narrowband
  • Stacking:  twenty five 240 second frames using PixInsight
  • Time:  1 hour 40 minutes
  • Session II:  25 January 2025 data by Jeffrey Higgins
  • Telescope:  Celestron C11 Edge-HD SCT with HyperStar (559mm, f/1.9)
  • Guiding:  ZWO ASI120MM mini mono guide camera,
  • ZWO 30mm guide scope
  • Computer:  ASIair plus Raspberry Pi
  • Mount:  ZWO AM5
  • Camera:  ZWO ASI2600MC Pro Cooled (-10°C) Color CMOS with gain 100
  • Filter:  Antlia Quad Band
  • Stacking:  twenty nine 120 second frames using PixInsight
  • Time:  58 minutes
  • Total Time:  2 hours 38 minutes
  • Processing:  Pixinsight – SPPC, DBE, SPCC, BlurXT, NoiseXT, DynCrop → Linear
  • MStr, GHS, HST, PMath MStr + GHS + HST → Stars, Sat (25 Jan data only)
  • StarXT, MStr, GHS, HST, PMath MStr + GHS + HST → Starless,
  • HDR464PhLm, Sat, PMath ~(~Stars*~Starless) → Blend,
  • for both data sets, PixelMath ~(~StarlessI*~StarlessII) → Nebula
  • PixelMath ~(~Stars*~Nebula) → Final, DynCrop/Scale
  • Processing by Robert Ostrander
  • Location:  Both data sets from Darling Hill Observatory near Vesper, NY