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Contains:  North America nebula, NGC 7000, NGC 6997, Pelican nebula, IC 5070, The star 57Cyg, The star 56Cyg
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NGC 7000 in SHO, 





    
        

            Gary
NGC 7000 in SHO

NGC 7000 in SHO

Technical card

Resolution: 3546x2710

Dates:June 13, 2019June 27, 2019

Frames:
Astrodon 31mm 5nm Ha: 29x300" (gain: 200.00) -20C bin 1x1
ZWO 31mm OIII 7nm v2: 12x300" (gain: 200.00) -10C bin 1x1
ZWO 31mm SII 7nm: 12x300" (gain: 200.00) -10C bin 1x1

Integration: 4.4 hours

Darks: ~20

Flats: ~20

Bias: ~200

Avg. Moon age: 17.46 days

Avg. Moon phase: 56.84%

Bortle Dark-Sky Scale: 4.67

Astrometry.net job: 2792451

RA center: 313.848 degrees

DEC center: 44.212 degrees

Pixel scale: 2.890 arcsec/pixel

Orientation: 101.924 degrees

Field radius: 1.791 degrees

Data source: Traveller

Description

NGC 7000 - The North America Nebula in SHO

NGC 7000 in the constellation Cygnus is an emission nebula covering an area in the sky over four times the size of the moon. We're unsure of its distance from Earth but if the star Deneb induces the ionization of gasses causing light emission as some think, it would be ~1,800 light-years away.

This was my first attempt at narrow band imaging and processing. Ha data was captured in my backyard under a 3/4 full moon. Sii and Oiii datga captured at a Bortle 3 dark site.

Processed in Pixinsight, Lightroom, and Photoshop
Batch Processing script for calibration
Star Alignment
Local Normalization on each stack
Image Integration
Drizzle Integration
Dynamic Crop
Linear Fit
DBE on each channel
NR with TVG and MMT per Jon Rista tutorial on each channel
Star removal on Sii, Ha, Oiii after saving Lum image from Ha. Used Starnet for Ha and combination of MMT and Starnet on Sii and Oiii images that were slightly out of focus. Wasn't able to remove all stars from Sii and Oiii so some aberrant star colors are present.
Stretched each channel and combined with Channel Combination.
Inverted RGB and applied SCNR to get rid of Magenta, then inverted back.
Used various color masks with Curves Transformation to adjust colors, saturation, and contrast.
NR on Lum frame using above TVG and MMT method
Local Histogram Equalization
Resampled at 40%
Minor global adjustments for exposure, contrast, saturation, etc. in Lightroom
Cosmetic corrections in Photoshop

Comments

Author

TripleBlack
Gary
License: None (All rights reserved)
490
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NGC 7000 in SHO, 





    
        

            Gary