M4 - Globular Cluster in Scorpius

Imaged from Nova Scotia, Spring 2018

Wikipedia Link for M4

 

RGB Combination

Data
Altitude at culmination 19°
Minimum Airmass Value (sec z) 3.1
Mean FWHM 3.9 arc-s
Taking Camera SBIG STL-11002XM Nova Scotia Spring 2018, ~mag 6.4 - no moon @-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 2hrs 10mins R9x5 min, G9x5 min, B8x5 min, 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 Mar 2023 PixInsight, Affinity Photo v.2.04 and Bob Franke's CCDBand-Aid

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