Messier 17 (SHO) (Linda)

Celestial hemisphere: Southern · Constellation: Sagittarius (Sgr) · Contains: Checkmark Nebula · HD168098 · HD168163 · HD168164 · HD168276 · HD168302 · HD168415 · HD168446 · HD168447 · HD168462 · HD168521 · HD168569 · HD168585 · HD168607 · HD168625 · HD168701 · HD168816 · HD168857 · HD168859 · IC 4706 · IC 4707 · LBN 60 · Lobster Nebula · M 17 · NGC 6618 · PGC 202401 · Sh2-45 · Swan Nebula · omega Nebula

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Messier 17 (SHO)

Link: https://lindasastronomyadventures.space/?p=11100

Powered byPixInsight

Messier 17 (SHO)

Link: https://lindasastronomyadventures.space/?p=11100

The universe seems to be conspiring to keep me from astronomy related activities over the last several weeks but I managed to get one completed and processed. I actually ended up collecting a lot more data here than intended because I lacked the time to do more than just start the existing script. So I'm counting that as a happy accident. I'm not sure that made much practical difference on a bright target like this but it definitely didn't hurt.

Here's how it was processed:

each S, H and O:
dynamic crop
GHS script
starXterminator (extracting unscreened stars)
histogram transformation (to stretch out the dynamic range occupied)
noiseXterminator

stars:
channel combination
histogram transformation to line up peaks
histogram transformation to reduce exposure

SHO:
channel combination
histogram transformation to line up peaks
HDRMT
LHE (2 scales)
SCNR (to tone down the green)
MLT sharpening
moved into photoshop to use content aware fill on a starXtermnator artifact
pixel math in stars (op_screen)

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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.

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Status	Advanced success
Started	...
Astrometry.net job	6124534
PixInsight job	5SHPV7SG7EVXGPWZ5KKED97X93XO98BZ
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	18h20m41s.114
RA (top/left)	18h22m42s.359
RA (top/right)	18h18m37s.475
RA (bottom/right)	18h18m39s.404
RA (bottom/left)	18h22m45s.244

Dec (center)	-16°08′08″.11
Dec (top/left)	-15°43′42″.16
Dec (top/right)	-15°44′24″.51
Dec (bottom/right)	-16°32′28″.20
Dec (bottom/left)	-16°31′46″.49

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Messier 17 (SHO)

Messier 17 (SHO)

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Messier 17 (SHO)

Messier 17 (SHO)

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Sky plot

Histogram

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