Globular Cluster NGC 6539 in Serpens

Imaged from Nova Scotia, Summer, 2022

Wikipedia Link for NGC6539

RGB Combination

Data
Altitude at culmination 38°
Minimum Airmass Value (sec z) 1.7
Mean FWHM 2.8 arc-s
Taking Camera SBIG STL-11002XM Nova Scotia Summer 2022, skies ~mag 6.6 - CCD @ -20C
Imaging OTA AGO 14.5" iDK
Equivalent focal length and ratio 2465mm @ f/6.7
Mount Astro-Physics 1600GTO
Guiding PHD2/ONAG/Lodestar X-2
RGB Total Integration Time 3hrs R-12x5min G-12x5min B-12x5min, Astrodon Gen 2 I series Filters. All Binned 1X1
Acquisition Main Sequence Software-Sequence Generator Pro
Calibration and Stacking Darks, Flats and Bias - Stacked and calibrated with PixInsight
Reprocessed Feb 2023 PixInsight, Affinity Photo v.2.04 and Bob Franke's CCDBand-Aid

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