Crescent Nebula in Ha (JDJ)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: 28 b02 Cyg · 29 b03 Cyg · Crescent nebula · IC 4996 · NGC 6881 · NGC 6888 · PK074+01.1 · PK074+02.1 · Sh2-105 · The star 28Cyg · The star 29Cyg

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Crescent Nebula in Ha

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Crescent Nebula in Ha

Last stop on my fall tour of the Cygnus region was the Crescent Nebula (NGC6668). This image is the H-alpha version using the red channel from images taken through an L-Enhance dual narrowband filter.

Imaged with WO GT81 at F4.7 (382 mm focal length) using Flat6A II field flattener/0.8x reducer, Optolong L-Enhance dual narrowband filter, and full spectrum modified Nikon D5300.

Pre-processed using PixInsight Batch Pre-Processing (BPP) script. Images calibrated using darks, bias, and flats. Extracted red/green/blue channels using BatchChannelExtraction script. Registered and stacked using StarAlighment and Integration. Total integration time of ~6 hours using 60 subs at ISO400x360 sec. Post-processed in Pixinsight: Cropped, gradient removal with ABE, MLT for noise reduction, stretched using STF settings in Histogram Transformation Tool, Curves Transformation, TGVDenoise for noise reduction, HDR transform, Local histogram transform.

The refractors!
Cloudy Nights
DSLR narrowband
The OSC Club (One Shot Camera)

Cygnus Region

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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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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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Status	Advanced success
Started	...
Astrometry.net job	3070255
PixInsight job	LSXZ6RONN68FD7TTMTOBSCPI3H75O5TQ
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	20h11m59s.45
RA (top/left)	20h17m41s.30
RA (top/right)	20h16m42s.21
RA (bottom/right)	20h06m02s.40
RA (bottom/left)	20h07m29s.40

Dec (center)	+38°18′51″.8
Dec (top/left)	+36°48′08″.5
Dec (top/right)	+39°58′10″.6
Dec (bottom/right)	+39°48′38″.9
Dec (bottom/left)	+36°39′04″.10

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Crescent Nebula in Ha

Crescent Nebula in Ha

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Crescent Nebula in Ha

Crescent Nebula in Ha

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