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Contains:  NGC 7039, North America nebula, NGC 7000, NGC 6997, Pelican nebula, IC 5070, IC 5068, The star ξCyg, The star 60Cyg, The star 57Cyg, The star 56Cyg, The star 55Cyg
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NGC 7000, 


            Manoj Koushik
NGC 7000

NGC 7000

Technical card

Resolution: 8219x6155

Dates:Oct. 21, 2019Oct. 30, 2019

FLI/Chroma Research Grade 65mm Square H-alpha 5nm: 19x1500" -20C bin 1x1
FLI/Chroma Research Grade 65mm Square O-III 3nm: 26x1800" -20C bin 1x1
FLI/Chroma Research Grade 65mm Square S-II 3nm: 19x1500" -20C bin 1x1

Integration: 28.8 hours

Darks: ~120

Flats: ~20

Bias: ~120

Avg. Moon age: 12.35 days

Avg. Moon phase: 28.77%

Bortle Dark-Sky Scale: 6.00

Mean SQM: 19.00 job: 3039203

RA center: 315.458 degrees

DEC center: 44.198 degrees

Pixel scale: 2.328 arcsec/pixel

Orientation: 0.998 degrees

Field radius: 3.320 degrees

Locations: Tapas Observatory, San Jose, CA, United States

Data source: Backyard


North American Nebula and Pelican Nebula captured under Bortle 6 skies. The left half of the image and especially the lower left shows a color hue indicative of OIII nebulosity (which also shows up in the individual frames of the stack and the stack). I had some problems with OIII acquisition (mis-matched flats). So not sure if it's actually nebulosity or data issues. Regardless I am leaving it in there since the rest of the image (OIII frames and stack) seems to show no such artifiacts, indicating that acquisition itself might be fine.



Manoj Koushik
License: None (All rights reserved)

Sky plot

Sky plot


NGC 7000, 


            Manoj Koushik