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



    
        

            Josh Woodward
The Crescent Nebula (NGC 6888)
Powered byPixInsight

The Crescent Nebula (NGC 6888)

Technical card


Dates:July 31, 2019Aug. 1, 2019

Frames:
ZWO Ha 1.25": 100x180" (gain: 300.00) -15C bin 1x1
ZWO OIII 1.25": 130x180" (gain: 300.00) -15C bin 1x1

Integration: 11.5 hours

Darks: ~30

Flats: ~20

Flat darks: ~25

Avg. Moon age: 14.62 days

Avg. Moon phase: 0.40%

Bortle Dark-Sky Scale: 5.00

Temperature: 19.00


Basic astrometry details

Astrometry.net job: 2832468

RA center: 20h 12' 19"

DEC center: +38° 19' 33"

Pixel scale: 3.167 arcsec/pixel

Orientation: 273.104 degrees

Field radius: 1.205 degrees


Resolution: 2181x1659

Locations: backyard, Chico, CA, United States

Data source: Backyard

Description

PixInsight Preprocess
* Blink - to look for stinkers
* Batch Preprocessing FD

PixInsight (Linear)
* Star Alignment
* Dynamic Crop
* PixelMath (Red - Ha, Green - OIII, Blue - OIII*0.8 + Ha*0.15)
* ABE
* Background Neutralization
* Noise reduction using Jon Rista process *(https://jonrista.com/the-astrophotographers-guide/pixinsights/effective-noise-reduction-part-1/)

PixInsight (Non-Linear)
* Histogram Transformation
* ACDNR
* Color Saturation
* HDR Multiscale Transform
* Morphological Transformation
* Curves

Photoshop CC
* Raw Filter tweaks

Comments

Author

j_n_dubya
Josh Woodward
License: None (All rights reserved)
1091
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The Crescent Nebula (NGC 6888), 



    
        

            Josh Woodward

In these public groups

Cloudy Nights
ZWO ASI1600MM/QHY163M