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Contains:  IC 1318, NGC 6910, The star Sadr (γCyg), gamma Cyg nebula
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Gamma Cygni Nebula (IC1318) in HOO, 



    
        

            JDJ
Gamma Cygni Nebula (IC1318) in HOO
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Gamma Cygni Nebula (IC1318) in HOO

Technical card


Dates:Oct. 14, 2019Oct. 15, 2019

Frames:Optolong L-eNhance 2": 40x360" ISO400

Integration: 4.0 hours

Darks: ~25

Flats: ~15

Bias: ~25

Avg. Moon age: 15.78 days

Avg. Moon phase: 98.59%


Basic astrometry details

Astrometry.net job: 3045452

RA center: 20h 25' 27"

DEC center: +40° 17' 56"

Pixel scale: 2.084 arcsec/pixel

Orientation: 273.904 degrees

Field radius: 1.973 degrees


Resolution: 5702x3738

Locations: Home, Silver Spring, Maryland, United States

Data source: Backyard

Description

This image of the Gamma Cygni Nebula (IC1318) in Cygnus was created using narrowband Ha and OIII/Hb data captured using a dual narrowband filter. I've been trying different processing approaches with the dual-narrowband filter data. RGB processing works pretty well most of the time, but in general I have found that using a narrowband processing flow and then generating an HOO image gives the best results.

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. R and G+B channels registered and stacked using StarAlighment and Integration. Total integration time of ~4 hours using 40 subs at ISO400x360 sec. R and G+B channels individually post-processed in Pixinsight: Cropped, gradient removal with ABE, MLT for noise reduction, stretched using masked stretch, Curves Transformation, TGVDenoise for noise reduction, HDR transform, Local histogram transform, morphological transform to shrink stars. HOO image generated using SHO-AIP script.

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JDJ
JDJ
License: None (All rights reserved)
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Gamma Cygni Nebula (IC1318) in HOO, 



    
        

            JDJ