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Contains:  Crescent nebula, NGC 6888
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NGC 6888 - Crescent Nebula (Blend of Ha & OIII), 


            Frank Breslawski
NGC 6888 - Crescent Nebula (Blend of Ha & OIII)

NGC 6888 - Crescent Nebula (Blend of Ha & OIII)

Technical card

Resolution: 3114x2406

Dates:Sept. 7, 2018Sept. 11, 2018

Astronomik H-Alpha 6nm CCD: 36x600" -20C bin 1x1
Astronomik OIII 6nm CCD: 33x600" -20C bin 1x1

Integration: 11.5 hours

Darks: ~50

Flats: ~10

Bias: ~200

Avg. Moon age: 14.46 days

Avg. Moon phase: 5.77%

Bortle Dark-Sky Scale: 4.00 job: 2328550

RA center: 303.030 degrees

DEC center: 38.332 degrees

Pixel scale: 0.927 arcsec/pixel

Orientation: 84.305 degrees

Field radius: 0.507 degrees

Locations: Home, Bergisches Land, Germany

Data source: Backyard


This is a mix of H-alpha and OIII data, which I used for my luminance of the Crescent Nebula (see Often you don't get a significant increase in details, if you add informations from the OIII images in addition to the pure H-alpha data. The Crescent Nebula, on the other hand, offers a lot and shows some great improvements in the outer areas by doing this. Hope you like it :-)



Frank Breslawski
License: Attribution-NonCommercial-ShareAlike Creative Commons

Sky plot

Sky plot


NGC 6888 - Crescent Nebula (Blend of Ha & OIII), 


            Frank Breslawski