NGC 2359 (also known as Thor's Helmet) is an emission nebula in the constellation Canis Major.
The nebula is approximately 15,000 light-years away and 30 light years in size.
The central star is the Wolf-Rayet star HD 56925, an extremely hot giant thought to be in a brief, pre-supernova stage of evolution.
It is similar in nature to the Bubble Nebula, interactions with a nearby large molecular cloud are thought to have contributed to the more complex shape and curved bow-shock structure of Thor's Helmet.
It is also Sharpless catalog Sh2-298 and Gum catalog 4 (WIKI)
This is the first image produced from my home observatory in a mid level light polluted area.
HA - 140 min (BIN 1)
O3 - 60 min (BIN 2)
Luminance - 60 min (BIN 1)
RGB - 20 min per channel (BIN 2)
Total of 5:20 HRS UNGUIDED!!!
Telescope - 8" F8 GSO RC (Carbon tube)
Mount - ASA DDM 60 PRO
NO GUIDING :)
Camera - SBIG ST8300M with BAADER filters.
Imaged from my home observatory in Gan-Yavne, Israel