M16 narrowband with natural colour (Geoff)

Celestial hemisphere: Southern · Constellation: Serpens (Ser) · Contains: Eagle nebula · IC 4703 · M 16 · NGC 6611 · Sh2-49 · Star Queen nebula

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M16 narrowband with natural colour

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M16 narrowband with natural colour

The colour mapping here was:

R -> Ha +SII

G -> OIII

B -> OIII + 0.25*Ha

The Eagle Nebula is part of a diffuse emission nebula, or H II region. This region of active current star formation is about 7000 light-years distant. The spire of gas that can be seen coming off the nebula in the northeastern part is approximately 9.5 light-years or about 90 trillion kilometers long.

The brightest star in the nebula (HD 168076) has an apparent magnitude of +8.24, easily visible with good binoculars. It is actually a binary star formed of an O3.5V star plus an O7.5V companion.

The cluster associated with the nebula has approximately 460 stars, the brightest of spectral class O, a mass of roughly 80 solar masses, and a luminosity up to 1 million times that of the Sun. Its age has been estimated to be 1–2 million years.

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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.
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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.
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	...
PixInsight job	9WW1P0JM2XQ3Q35MRLC2SUPVHCFDAFEF
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	18h19m13s.890
RA (top/left)	18h17m34s.958
RA (top/right)	18h17m29s.805
RA (bottom/right)	18h20m53s.192
RA (bottom/left)	18h20m57s.651

Dec (center)	-13°53′32″.12
Dec (top/left)	-13°28′31″.68
Dec (top/right)	-14°17′17″.53
Dec (bottom/right)	-14°18′29″.65
Dec (bottom/left)	-13°29′42″.80

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M16 narrowband with natural colour

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M16 narrowband with natural colour

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