M17 - The Omega Nebula in Sagittarius (Göran Nilsson)

Celestial hemisphere: Southern · Constellation: Sagittarius (Sgr) · Contains: Checkmark Nebula · IC 4707 · Lobster Nebula · M 17 · NGC 6618 · Sh2-45 · Swan Nebula · omega Nebula

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M17 - The Omega Nebula in Sagittarius

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M17 - The Omega Nebula in Sagittarius

The Omega Nebula, aka the Swan Nebula, is a southern hemisphere nebula that lies 5,000 - 6,000 light-years from Earth and 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. The open cluster NGC 6618 lies embedded in the nebulosity and causes the gases of the nebula to shine due to radiation from these hot, young stars. All according to Wikipedia.

This is LRGB data from Telescope Live at the El Sauce hosting facility at 1500m elevation in Río Hurtado, Coquimbo Region, Chile. RGB data is 3 x 10 min for each channel. Lum is 5 x 10 min. 61 cm aperture clearly helps to keep S/N high even after a rather short integration time.

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	Advanced success
Started	...
Astrometry.net job	4538792
PixInsight job	SIMATU4CYYBYXBYFNQTXH31CRZ5JCAUZ
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	18h21m01s.916
RA (top/left)	18h22m12s.600
RA (top/right)	18h19m50s.739
RA (bottom/right)	18h19m51s.561
RA (bottom/left)	18h22m13s.256

Dec (center)	-16°09′01″.61
Dec (top/left)	-15°51′54″.54
Dec (top/right)	-15°52′10″.00
Dec (bottom/right)	-16°26′07″.72
Dec (bottom/left)	-16°25′51″.73

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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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