Thor's Helmet (NGC 2359) (John Sojka Jr.)

Celestial hemisphere: Southern · Constellation: Canis Major (CMa) · Contains: NGC 2359 · Sh2-298

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Thor's Helmet (NGC 2359)

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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 months, between February and April 2020 from Sky Meadows State Park, VA, and required a total exposure time of 6 hours. 60+ 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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Distribution of astrophotographers

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	Distinct awarded users	Total awarded images
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This table shows the distribution of awards per subject type, compared to the popularity of images of that subject type.
	Image of the day	Top pick	Top pick nominations	Total submitted
Deep sky
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	Image of the day	Top pick	Top pick nominations	Total submitted
Backyard
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Unknown

The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

Submitted The date and time when you submitted this image for IOTD/TP consideration.	...
Views by Submitters (available since September 19th, 2023) Every image is assigned to 50% of available Submitters. In the event that at least 80% of them don't view the image before its time in the IOTD/TP process expires, it's assigned to the other 50% of Submitters and the process begins anew.
Promotions by Submitters When 3 distinct Submitters promote the image, it moves on to the next stage of the process: evaluation for Top Pick status. This requirement, in addition to anonymization of images and distribution to only a subset of them, prevents biases and ensures that the best images are selected.
Promotions by Reviewers When 3 distinct Reviewers promote the image, it moves on to the next stage of the process: evaluation for IOTD status.
Early dismissal Staff members have a lot of images to inspect on a daily basis, and they can dismiss images if they believe they don't meet the requirements for IOTD/TP selection. If an image is dismissed 5 times, it's removed from the process. This streamlines the process and ensures that any bias present in promotions could be overruled by other staff members.

Status	Advanced success
Started	...
Astrometry.net job	3493819
PixInsight job	J3CDHN2QSFKF22JXKAT1WOIT7E4STN1N
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	07h18m34s.780
RA (top/left)	07h17m47s.897
RA (top/right)	07h17m58s.605
RA (bottom/right)	07h19m20s.275
RA (bottom/left)	07h19m09s.444

Dec (center)	-13°13′14″.72
Dec (top/left)	-13°00′09″.99
Dec (top/right)	-13°28′11″.43
Dec (bottom/right)	-13°26′19″.53
Dec (bottom/left)	-12°58′18″.60

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Thor's Helmet (NGC 2359)

Thor's Helmet (NGC 2359)

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Image Index:

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Thor's Helmet (NGC 2359)

Thor's Helmet (NGC 2359)

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