Thor's Helmet (NGC 2359) HOO with RGB Stars (John Sojka Jr.)

Celestial hemisphere: Southern · Constellation: Canis Major (CMa) · Contains: HD57057 · HD57083 · LBN 1040 · LBN 1041 · NGC 2359 · Sh2-298

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Thor's Helmet (NGC 2359) HOO with RGB Stars

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Thor's Helmet (NGC 2359) HOO with RGB Stars

Thor's Helmet, NGC 2359. This dramatic Deep Space Object is one of my favorites, and a difficult target to image. It is an emission nebula in Cannis Major and is approximately 11,960 Light Years from Earth. Its unique shape is owed to the Wolf-Rayet star in the center of the nebula. Wolf-Rayets are among the hottest stars in the Universe and are high producers of heavy elements.

This bi-color image was taken over the course of three years from Sky Meadows State Park, VA, and required a total exposure time of 13 hours. 150+ images were taken at two different wavelengths only emitted by the nebula. The wavelengths are Oxygen III (OIII) at 500.7nm and Hydrogen Alpha (Ha) at 656.28nm. The Hubble Space telescope uses these wavelengths to image the Universe. They are part of "The Hubble Palette". Multiple 5+ minute images are taken at each wavelength. The individual images are later stacked and averaged producing a single, clear image. To create a bi-color image, Ha is mapped to red, and OIII is mapped to green and blue. They are combined to form a final RGB image.

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Status	Advanced success
Started	...
Astrometry.net job	9171128
PixInsight job	KS95X12WL22TE6975K7L0M3QZ9E6KUM0
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	07h18m42s.356
RA (top/left)	07h17m40s.552
RA (top/right)	07h17m40s.820
RA (bottom/right)	07h19m44s.293
RA (bottom/left)	07h19m43s.964

Dec (center)	-13°13′54″.70
Dec (top/left)	-13°02′44″.45
Dec (top/right)	-13°25′11″.97
Dec (bottom/right)	-13°25′04″.22
Dec (bottom/left)	-13°02′36″.32

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Thor's Helmet (NGC 2359) HOO with RGB Stars

Thor's Helmet (NGC 2359) HOO with RGB Stars

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Thor's Helmet (NGC 2359) HOO with RGB Stars

Thor's Helmet (NGC 2359) HOO with RGB Stars

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