NGC 2359, Thor’s Helmet



NGC 2359 (also known as Thor’s Helmet) is an emission nebula in the constellation Canis Major. The nebula is approximately 3,670 parsecs (11.96 light years) away and 30 light-years in size. The central star is the Wolf-Rayet star WR7, an extremely hot giant thought to be in a brief pre-supernova stage of evolution. It is similar in nature to the Bubble Nebula, but 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. It is also catalogued as Sharpless 2-298 and Gum 4.

Imaging telescopes or lenses: AT6RC
Imaging cameras: Atik 314L+
Mounts: Orion Atlas EQ-G
Guiding telescopes or lenses: Orion ED80T CF
Guiding cameras: Orion SSAG
Software: DeepSkyStacker,  photoshop, Nebulosity,  Thousand Oaks Résistance pour télescope de 5”
Filters: Ha,  Meade Blue,  Meade Green, Meade Green
Accessories: Orion Dewzapper
Resolution: 1100×880
Dates: Jan. 6, 2012,  Jan. 25, 2012
Meade Blue: 10×600″ -10C bin 2×2
Meade Green: 10×600″ -10C bin 2×2
Ha: 12×1200″ -10C bin 1×1
Meade Green: 10×600″ -10C bin 2×2
Integration: 9.0 hours
Flats: ~20
Avg. Moon age: 6.66 days
Avg. Moon phase: 46.20%
Bortle Dark-Sky Scale: 6.00
RA center: 109.666 degrees
DEC center: -13.247 degrees
Pixel scale: 1.174 arcsec/pixel
Orientation: 92.732 degrees
Field radius: 0.230 degrees
Locations: Mason OH, None
Author: rigel123