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Contains:  Crescent nebula, NGC 6888
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Crescent Nebula NGC 6888- HOO

Technical card

Imaging telescope or lens:Boren-Simon PowerNewt 8

Imaging camera:ZWO ASI1600MM-Cool

Mount:Orion Atlas EQ-G

Guiding camera:ZWO ASI1600MM-Cool

Focal reducer:ASA 2" Reducer 0,73

Software:Lightroom CCPixInsight

Filters:Astrodon Ha 1.25 5nmAstrodon OIII 1.25 3nm

Accessory:ZWO OAG

Resolution: 4536x3408

Dates:July 4, 2017

Astrodon Ha 1.25 5nm: 165x90" (gain: 200.00) -20C
Astrodon OIII 1.25 3nm: 189x90" (gain: 200.00)

Integration: 8.8 hours

Darks: ~50

Flats: ~50

Bias: ~250

Avg. Moon age: 10.56 days

Avg. Moon phase: 81.28% job: 1672427

RA center: 20h 12' 8"

DEC center: +38° 20' 31"

Pixel scale: 1.288 arcsec/pixel

Orientation: 126.393 degrees

Field radius: 1.015


*** Was able to add data from 2017-07-29 to bring out the Oiii in the region as well as bring more definition and color to the Oiii envelope***

I finally had some clear nights and of course they were during an almost full moon. Despite the moon I just had to get out, so this was imaged over two nights with an average of 90% moon. I captured 1.75 hours of SII as well, but the signal is weak and with this limited integration all I could seem to do was neutralize color and add noise. I ended up settling on HOO as the signal was really good for both of these channels despite a short integration. I'm going to spend some more time on this if I get the chance. Dark skies would really make this target stand out.



Chris R White
License: None (All rights reserved)


Sky plot

Sky plot


Crescent Nebula NGC 6888- HOO, 


            Chris R White

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