Swan Central Ridge (Kevin Morefield)

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

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Swan Central Ridge

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Swan Central Ridge

I am currently shooting a tight field of view (8300 chip at 2563mm) and I wanted to focus on the central ridge of the Swan. This may seem upside-down but I felt this orientation better presented this area of the Swan Nebula.

I am developing a habit of calibrating and "pruning" subs in CCDStack and then assembling the initial image in Pixinsight. Finishing touches, color tweaks in Photoshop, noise reduction via Topaz, and final checking everything on my MacBook. The MacBook comes in because it has the best calibrated screen!

Subs ranged from 1.5 to 3.0 arc-seconds FWHM. Median was around 2 a-s. 37 SII, 36 Ha, and 45 OIII subs made the cut. All were 900 seconds for a total integration time of 29.5 hours.

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Description: Re-edited to tone down the color contrast and reflect what I've learned lately!

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Status	Advanced success
Started	...
Astrometry.net job	1861126
PixInsight job	687JO9Y68ZCMJBPGE3U4PECCHC7KR5QV
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	18h20m54s.394
RA (top/left)	18h19m52s.272
RA (top/right)	18h21m25s.400
RA (bottom/right)	18h21m56s.488
RA (bottom/left)	18h20m23s.818

Dec (center)	-16°12′30″.68
Dec (top/left)	-16°15′52″.27
Dec (top/right)	-16°25′54″.93
Dec (bottom/right)	-16°09′08″.20
Dec (bottom/left)	-15°59′06″.27

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