About this Image
The colorful nebula Thor's Helmet (NGC 2359) is situated in Canis Major, very low for northern observers.
In the case of this nebula all of the power and strength is derived from the very energetic star in the center of the bubble of gas.
This unusual star is classified as being "Wolf-Rayet" type and is very rare.
20 " Keller cassegrain in corrected secondary focus at f/9
|Camera||SBIG STL-11000M at -15C, 8-pos STL filter wheel|
|Date||Apr 29, 2008.|
|Sky Conditions||dark skies, raw FWHM 1.5-2" temperature 15 C,|
R:G:B = 40:40:40 minutes (10-minute sub-exposures);
synthetic luminance used
Maxim DL 4.5;