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Marcus Davies (marc4darkskies) | all galleries >> bellsobservatory >> photography >> Awards and Publications > Thor's Helmet (NGC 2359)
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08-Feb-2016 Marcus Davies

Thor's Helmet (NGC 2359)

AAPOD2: 4 June 2016

Thor's Helmet is an emission nebula in the constellation of Canis Major nearly 12,000 light years away. The central star is a massive and unstable Wolf-Rayet star WR7, an extremely hot giant. Very strong winds from this star interact with the surrounding stellar medium at very high speed (millions of kilometers per hour) causing it to glow blue-green colour and create shock wave arcs seen in the central bubble-like structure.

SBIG STXL-11002, AO-X,Officina Stellare Pro RC360
This is a 17.33 hour LRGBHaOIII exposure (170, 90, 90, 90, 360, 240 minutes) using 10 minute subs for LRGB and 30 minute subs for Ha and OIII. All 1x1.

FOV 23.7 x 34.3 arc minutes @ 0.59 arc second/pixel.

Seeing for Luminance was average - 2.2 arcsec FWHM. full exif

other sizes: small medium large original auto