M17 - The Omega Nebula in Sagittarius with SHO palette. (Cfosterstars)

Celestial hemisphere: Southern · Constellation: Sagittarius (Sgr) · Contains: M 17 · NGC 6618 · Omega nebula · Sh2-45

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M17 - The Omega Nebula in Sagittarius with SHO palette.

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M17 - The Omega Nebula in Sagittarius with SHO palette.

This is my first attempt at M17. This is in narrowband using the Hubble Palette.

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.

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

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Description: Full field of view

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Status	Advanced success
Started	...
Astrometry.net job	2194460
PixInsight job	ZJTEVM4CYD2IKB2L6XP2DD2Z38PDV88K
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	18h20m32s.492
RA (top/left)	18h18m29s.235
RA (top/right)	18h22m39s.653
RA (bottom/right)	18h22m34s.963
RA (bottom/left)	18h18m25s.481

Dec (center)	-16°06′30″.76
Dec (top/left)	-16°32′56″.93
Dec (top/right)	-16°31′44″.17
Dec (bottom/right)	-15°40′02″.20
Dec (bottom/left)	-15°41′09″.45

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M17 - The Omega Nebula in Sagittarius with SHO palette.

M17 - The Omega Nebula in Sagittarius with SHO palette.

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M17 - The Omega Nebula in Sagittarius with SHO palette.

M17 - The Omega Nebula in Sagittarius with SHO palette.

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