NGC2359 Thor's Helmet (SHO) in the constellation of Canis Major (Phil Swift)

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

NGC2359 Thor's Helmet (SHO) in the constellation of Canis Major, Phil Swift

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NGC2359 Thor's Helmet (SHO) in the constellation of Canis Major

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NGC2359 Thor's Helmet (SHO) in the constellation of Canis Major

Thor's Helmet is an emission nebula in the constellation Canis Major.

The nebula is approximately 3,670 parsecs (11.96 thousand light years) away and 30 light-years in size.

The central star is the Wolf-Rayet star WR7, an extremely hot star thought to be in a brief pre-supernova stage of evolution.

It is similar in nature to the Bubble Nebula, but 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.

The nebula has an overall bubble shape, but with complex filamentary structures.

The nebula contains several hundred solar masses of ionised material, plus several thousand more of unionised gas.

It is largely interstellar material swept up by winds from the central star, although some material does appear to be enriched with the products of fusion and is likely to come directly from the star, itself.

Please note: The following tables are updated every 24 hours.

Distribution of astrophotographers

This table shows the number of distinct astrophotographers who have been assigned and IOTD/TP award compared to the total number of images awarded.
	Distinct awarded users	Total awarded images
Image of the day
Top picks
Top pick nominations

Distribution of subject types

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
Solar system
Extremely wide field
Star trails
Northern lights
Noctilucent clouds
Landscape

Distribution of data sources

This table shows the distribution of awards per data source, compared to the popularity of images acquired from that data source.
	Image of the day	Top pick	Top pick nominations	Total submitted
Backyard
Traveller
Own remote observatory
Amateur hosting facility
Public amaeteur data
Professional, scientific grade data
Mix of multiple sources
Other
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	Basic success
Started	...
Astrometry.net job	4340035
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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NGC2359 Thor's Helmet (SHO) in the constellation of Canis Major

NGC2359 Thor's Helmet (SHO) in the constellation of Canis Major

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Image Index:

Contribution Index (beta):

NGC2359 Thor's Helmet (SHO) in the constellation of Canis Major

NGC2359 Thor's Helmet (SHO) in the constellation of Canis Major

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