M17/The Omega Nebula in Sagittarius (Sigga)

Celestial hemisphere: Southern · Constellation: Sagittarius (Sgr) · Contains: LBN 57 · LBN 60 · LDN 359 · M 17 · NGC 6596 · NGC 6618 · Omega nebula · Sh2-45 · Sh2-47

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M17/The Omega Nebula in Sagittarius

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M17/The Omega Nebula in Sagittarius

The Omega Nebula, also known as the Swan Nebula, Checkmark Nebula, and the Horseshoe Nebula catalogued as Messier 17 or M17) is an H II region in the constellation Sagittarius. It was discovered by Philippe Loys de Chéseaux in 1745. Charles Messier catalogued it in 1764. It is located in the rich starfields of the Sagittarius area of the Milky Way.

The Omega Nebula is between 5,000 and 6,000 light-years from Earth and it spans some 15 light-years in diameter. The cloud of interstellar matter of which this nebula is a part is roughly 40 light-years in diameter and has a mass of 30,000 solar masses. The total mass of the Omega Nebula is an estimated 800 solar masses.

It is considered one of the brightest and most massive star-forming regions of our galaxy. Its local geometry is similar to the Orion Nebula except that it is viewed edge-on rather than face-on.

--Wikipedia

More:

Messier17 - Wikipedia

Messier17 - Astropixels.com

Messier17 - SEDS

This is image #17 in long term project to photograph the complete Messier catalog.

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Description: Reprocessed for colour, sharpness and contrast.

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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	Advanced success
Started	...
Astrometry.net job	1585172
PixInsight job	LB5HLBINKP9347SX71IM1WBF9PLB1XT4
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	18h20m49s.43
RA (top/left)	18h17m33s.59
RA (top/right)	18h24m20s.98
RA (bottom/right)	18h24m03s.71
RA (bottom/left)	18h17m18s.77

Dec (center)	-16°10′42″.1
Dec (top/left)	-16°49′44″.0
Dec (top/right)	-16°44′37″.6
Dec (bottom/right)	-15°31′28″.4
Dec (bottom/left)	-15°36′37″.5

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M17/The Omega Nebula in Sagittarius

M17/The Omega Nebula in Sagittarius

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M17/The Omega Nebula in Sagittarius

M17/The Omega Nebula in Sagittarius

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