NGC 2359 Thor's Helmet

NGC 2359, known as Thor's Helmet and also catalogued as Sharpless 2-298, is an emission nebula  of the Wolf -Rayet type.

Its central star has been classified as Wolf-Rayet type (a massive star in a pre-supernova stage) and has been catalogued as WR7 (HD 56925). Its distance is uncertain and is estimated to be between 11000 and 22000 light years.

It is not easy to get a good image of this object from Àger as it rises very little above the southern horizon (its declination is -13º13.5').

The image is a Ha-OIII-OIII composition with stars in RGB. It accumulates an exposure of 18 hours.

Click on the image for a 100% version, or go to the Gallery section for complete exposure details.

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