M17 The Omega Nebula (Dale A Chamberlain)

Celestial hemisphere: Southern · Constellation: Sagittarius (Sgr) · Contains: Checkmark Nebula · EF Ser · HD168447 · HD168521 · HD168569 · HD168585 · HD168607 · HD168625 · HD168701 · LBN 60 · Lobster Nebula · M 17 · NGC 6618 · Sh2-45 · Swan Nebula · V1966 Sgr · V1970 Sgr · V1971 Sgr · V1973 Sgr · omega Nebula

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M17 The Omega Nebula

Link: https://chamberlainobservatory.com/m17-omega-nebula/

Powered byPixInsight

M17 The Omega Nebula

Link: https://chamberlainobservatory.com/m17-omega-nebula/

The Omega Nebula, also known as the Swan Nebula, Checkmark Nebula, and the Horseshoe Nebula (cataloged as Messier 17 or M17 or NGC 6618), is an H II region in the constellation Sagittarius. Philippe Loys de Chéseaux discovered it in 1745. Charles Messier cataloged it in 1764. It is 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 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 our galaxy's brightest and most massive star-forming regions. Its local geometry is like 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; however, the actual number of stars in the nebula is much higher - up to 800, plus over a thousand stars in formation on its outer regions. It is also one of the youngest clusters, with an age of just 1 million years.

The Swan portion of M17, the Omega Nebula in the Sagittarius nebulosity is said to resemble a barber's pole.

Narrowband imaging
Central USA
PixInsight Addicts
Ritchey Chretien telescopes GSO Family
CMOS Imagers
Cloudy Nights
ZWO ASI1600MM/QHY163M

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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	6850094
PixInsight job	HG6TMWPUU5USFSC4DQKMRE43BU2RS0KV
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	18h20m57s.465
RA (top/left)	18h20m56s.663
RA (top/right)	18h19m45s.361
RA (bottom/right)	18h20m58s.175
RA (bottom/left)	18h22m09s.385

Dec (center)	-16°09′22″.30
Dec (top/left)	-16°28′11″.84
Dec (top/right)	-16°01′57″.22
Dec (bottom/right)	-15°50′33″.97
Dec (bottom/left)	-16°16′44″.91

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M17 The Omega Nebula

M17 The Omega Nebula

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