Thor’s Helmet NB – NGC 2359

Thor’s Helmet
NGC 2359
Canis Major
BrewSky Observatory, Casa Grande, AZ
Celestron Edge 11 on Paramount, SBig 8300F Camera/Filter Wheel/St-i guider
# Exp (min) Filter Bin Net Time (min)
16 10 HAlpha 1×1 160
15 10 Green 1×1 150
30 10 OIII 1×1 300
Total 10 hr
Calibrated in MaximDL
Processed in PixInsight.
This version uses only HAlpha, Oiii, and Green exposures (no Luminous). I accidentally ran Oiii twice, which is why there are so many Oiii subframes:)
NGC 2359 (also known as Thor’s Helmet) is an emission nebula in the constellation Canis Major. The nebula is approximately 15,000 light-years away and 30 light-years in size. The central star is the Wolf-Rayet star HD 56925, an extremely hot giant thought to be in a brief, pre-supernova stage of evolution. It is similar in nature to the Bubble Nebula, interactions with a nearby large molecular cloud are thought to have contributed to the more complex shape and curved bow-shock structure of Thor’s Helmet. (Wikipedia)

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