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Contains:  IC 4996, Crescent nebula, NGC 6888
Getting plate-solving status, please wait...
NGC 6888: A fish in the ocean, 


            Glenn Diekmann
NGC 6888: A fish in the ocean

NGC 6888: A fish in the ocean

Technical card

Resolution: 4400x3256

Dates:June 27, 2019July 1, 2019

Astrodon Blue Tru-Balance E-Series Gen 2: 63x30" (gain: 76.00) -10C
Astrodon Green Tru-Balance E-Series Gen 2: 65x30" (gain: 76.00) -10C
Astrodon H-alpha 5 nm: 105x180" (gain: 139.00) -10C
Astrodon OIII 3 nm: 79x180" (gain: 139.00) -10C
Astrodon Red Tru-Balance E-Series Gen 2: 69x30" (gain: 76.00) -10C

Integration: 10.8 hours

Darks: ~50

Flats: ~16

Bias: ~200

Avg. Moon age: 26.09 days

Avg. Moon phase: 16.18%

Bortle Dark-Sky Scale: 7.00 job: 2863762

RA center: 20h 9' 31"

DEC center: +38° 0' 10"

Pixel scale: 2.323 arcsec/pixel

Orientation: 1.108 degrees

Field radius: 1.766

Data source: Backyard


This image reminds me of a fish (or a jellyfish) swimming among kelp fronds in the ocean. Can you see it?

I used the RGB master as the foundation and then blended in the Ha and OIII data in PixInsight using PixelMath. One of my goals was to keep the stars natural looking. I used Ha at about 40% strength for the luminance channel. I found that this gave a three-dimensional look to the larger surrounding nebula.



Glenn Diekmann
License: None (All rights reserved)

Sky plot

Sky plot


NGC 6888: A fish in the ocean, 


            Glenn Diekmann