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Contains:  NGC 6885, NGC 6882, The star 20Vul, The star 19Vul, The star 18Vul
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NGC 6882 and NGC 6885 - Open Clusters, 





    
        

            Jonathan W MacCollum
NGC 6882 and NGC 6885 - Open Clusters

NGC 6882 and NGC 6885 - Open Clusters

Technical card

Resolution: 4944x3284

Dates:July 14, 2019

Frames: 109x30"

Integration: 0.9 hours

Avg. Moon age: 12.49 days

Avg. Moon phase: 94.26%

Astrometry.net job: 2802809

RA center: 302.933 degrees

DEC center: 26.677 degrees

Pixel scale: 0.983 arcsec/pixel

Orientation: 3.172 degrees

Field radius: 0.811 degrees

Data source: Backyard

Description

Spent some time bouncing around a few summer-time open clusters on the only clear night available to me last week.

Enjoy, and feel free to share your thoughts and criticism. I never want to stop learning and improving!

Acquisition and Pre-Processing:
* Best 109 (of 150 total) x30s Lights weighted using the following subframe expression:
(10*(1-(FWHM-FWHMMin)/(FWHMMax-FWHMMin))
+ 15*(1-(Eccentricity-EccentricityMin)/(EccentricityMax-EccentricityMin))
+ 25*(SNRWeight-SNRWeightMin)/(SNRWeightMax-SNRWeightMin))
+ 50
* Stacked with Linear Fit Clipping and CFA Drizzle 1x with 0.7 drop shrink

Color Calibration:
* DBE -> Background Neutralization -> Color Calibration -> Photometric Color Calibration
* Assign RGB Working space to 1,1,1

RGB Processing:
* TGV with a low contrast mask and strong edge protection
* MMT noise reduction with a high protective luminance mask
* HSV Repaired Separation Script
* Arcsinh Stretch to non-linear

Luminance Processing:
* Extract Synthetic Luminance
* Masked Stretch and Curves

Final Touches:
* LRGB Combination of L with RGB
* Chrominance noise reduction on the brighter stars to eliminate grid-like structures

Comments

Author

eigenVector
Jonathan W MacCollum
License: None (All rights reserved)
740
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NGC 6882 and NGC 6885 - Open Clusters, 





    
        

            Jonathan W MacCollum

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