NGC 2359 in Canis Major, Thor's Helmet
NGC 2359 or Thor's Helmet is an emission nebula in Canis Major.
Hover over the image for an annotated view.
Date: 4 March 2022 and 25 January 2025
FOV: cropped to 75' × 50'
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