NGC 2359 (Thor's Helmet)

NGC 2359 (also catalogued as Sh2-298 and called Thor's Helmet) is an emission nebula in the constellation Canis Major. It is approximately 15,000 light-years away from Earth and its size is approximately 30 light years. The central star is an extremely hot Wolf-Rayet star, a giant thought to be in a pre-supernova stage of its evolution. The Thor's Helmet is similar in nature to the Bubble Nebula, but interactions with a nearby large molecular cloud probably have contributed to its more complex shape and structure.



Object Details:

Object: NGC 2359 (Sh2-298)
Constellation: Canis Major
Center of field: R.A. 07h 18m 30s ; DE. -13° 13′48″
Field dimensions: Ca 15 x 20 '


Technical Details:

Optics: 12" ASA Astrograph at F/3.6
Mount: ASA DDM 85
Camera: SBIG STL-11000M
Filters: Astronomik LRGB filters
Dates/Times: 31 October 2011
Location: Rozhen
Exposure Details: L = 60 min, R = 40 min., G = 40 min.,B = 40 min.;
Subexposures: 10 minutes
Acquisition: CCD Soft
Processing: PixInsight, Photoshop CS

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