M17, Swan/Omega Nebula (Reggie)

Celestial hemisphere: Southern · Constellation: Sagittarius (Sgr) · Contains: Checkmark Nebula · HD168276 · HD168302 · HD168415 · HD168446 · HD168447 · HD168462 · HD168521 · HD168569 · HD168585 · HD168607 · HD168625 · HD168700 · HD168701 · HD168726 · IC 4706 · IC 4707 · LBN 60 · Lobster Nebula · M 17 · NGC 6618 · Sh2-45 · Swan Nebula · omega Nebula

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M17, Swan/Omega Nebula

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M17, Swan/Omega Nebula

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.[3] 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; however, the actual number of stars in the nebula is much higher - up to 800, 100 of spectral type earlier than B9, and 9 of spectral type O,[citation needed] plus over a thousand stars in formation on its outer regions. It is also one of the youngest clusters known, with an age of just 1 million years.

The luminous blue variable HD 168607, in the south-east part of the nebula, is generally assumed to be associated with it; its close neighbor, the blue hypergiant HD 168625, may be too.

Cloudy Nights
Southern Hemisphere Astro

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	Distinct awarded users	Total awarded images
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	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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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.
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Promotions by Reviewers When 3 distinct Reviewers promote the image, it moves on to the next stage of the process: evaluation for IOTD status.
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Status	Advanced success
Started	...
Astrometry.net job	6027434
PixInsight job	MWOXUZACBM06XW64Q0Q96AIXYYEU19HF
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	18h20m50s.835
RA (top/left)	18h19m17s.675
RA (top/right)	18h19m31s.631
RA (bottom/right)	18h22m24s.365
RA (bottom/left)	18h22m09s.544

Dec (center)	-16°10′02″.40
Dec (top/left)	-15°39′57″.49
Dec (top/right)	-16°42′23″.70
Dec (bottom/right)	-16°40′05″.72
Dec (bottom/left)	-15°37′40″.98

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M17, Swan/Omega Nebula

M17, Swan/Omega Nebula

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M17, Swan/Omega Nebula

M17, Swan/Omega Nebula

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