NGC 2359 SHO with CHI-1 and CHI-3

NGC2359, also known as Thor's helmet, is an emission nebula located in the constellation Canis Major, at a distance of about 15,000 light-years. It is one of the most famous Wolf-Rayet bubble.

Unlike typical emission nebulae, in which young hot O-type stars ionize the gas cloud from which they are formed, much of the gas surrounding the Wolf-Rayet star HD 56925 comes from the star itself. The mechanism for this is similar to the process in which planetary nebulae form. Wolf-Rayet stars represent the last stage in the evolution of massive and super-massive stars (> 20 solar masses), before they explode into a supernova. These stars lose mass at a prodigious rate, losing most of their hydrogen and exposing the very hot stellar core. The gas is ejected at high speed and plows into the surrounding interstellar material, forming the complex knots and shock arcs visible in the photo.

CDK 24 + PL9000 :

Hii : 4x600s + 16x300s

Oiii : 4x600s + 16x300s

Sii : 4x600s + 16x300s

RC 1000 + PL16803 :

Hii : 6x600s

Oiii : 6x600s

Sii : 4x600s

I have embedded the RC1000 data in the center of the nebula to slightly increase the details (not so much because of seeing, but a little bit), and was anyway limited by the little amount of integration time of both data sets though i am happy with it!