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NGC 2359, Thor’s Helmet

Thor’s Helmet (NGC 2359) is an emission nebula in the constellation Canis Major. The nebula is similar to the helmet of the Norse god of thunder and lightning, Thor.
Thor’s helmet lies about 11.96 light years from Earth.
The central star nebula is the Wolf-Rayet star WR7. It is an extremely hot star. Thor’s Helmet is similar in nature to the Bubble Nebula (NGC 7635), with a more complex shape and curved helmet-shaped structure. The nebula has the overall shape of a bubble, but with complex fibrous structures.

Telescope ASA 10″ F/3.6 10N ASTROGRAPH OTA
Focal length 900 mm
Mount G53f
Imaging camera Atik 460EX mono
Guiding cameras Lodestar X2 -Autoguider
Guiding optics ASA 10″- OAG
Focal reducers ASA 3″ Wynne Corrector 0,85x
Constellations Canis Major
Distance 11 960 light years
RA center 07h 08′ 30″
DEC center -13°13′ 48″
Location taken Slovakia
Date taken 04/2019
Pixel scale 1.04 arcsec/pixel
Filters Astronomik Ha 6nm ,
Astrodon OIII 5nm,
Exposure 31×600 s.  Ha filter
20×600 s.  OIII filter
Total exposure cca.8,5 hours
Processing software PixInsight, CCD Inspector

The object Thor’s Helmet (NGC 2359-BICOLOR)was captured using narrowband filters a Hydrogen-alpha H-α 6nm (656.3 nm) , Oxygen OIII 5nm (500.7 nm) . The image was by collecting long exposure ( 600-1200s.)images that uncover the bright emission gases in visible light.

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