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Contains:  IC 4996, Crescent nebula, NGC 6888
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NGC 6888 - Crescent Nebula (HaOIIIRGB)

Technical card

Resolution: 2500x1943

Dates:July 31, 2017Aug. 14, 2017Aug. 20, 2017

35x300" ISO800
Optolong H-alpha 12nm EOS APS-C Clip: 17x600" ISO1600
Astronomik O3 12 nm: 27x600" ISO1600

Integration: 10.2 hours

Darks: ~40

Flats: ~75

Bias: ~75

Avg. Moon age: 19.29 days

Avg. Moon phase: 38.92% job: 1727876

RA center: 302.969 degrees

DEC center: 38.358 degrees

Pixel scale: 3.383 arcsec/pixel

Orientation: 94.069 degrees

Field radius: 1.488 degrees


July, August 2017. Puchberg & Waidhofen/Thaya (Austria)



Bernhard Zimmermann
License: None (All rights reserved)

Sky plot

Sky plot


NGC 6888 - Crescent Nebula (HaOIIIRGB), 


            Bernhard Zimmermann