M81 in Ursa Major
Imaged from Nova Scotia, Spring, 2015
LRGB Combination
Data
Altitude at culmination 69°
Minimum Airmass Value (sec z) 1.1
Mean FWHM 3.3 arc-s
Taking Camera SBIG STL-11002XM
Nova Scotia Spring, 2015, ~mag 6.4 - @-20C
Imaging OTA
AG Optics iDK 14.5"
Equivalent focal length and ratio
2465mm f/6.7
Mount
Astro-Physics 1600GTO
Guiding
PHD2/MMOAG/SBIG ST-i
LRGB Total integration time 7hr 30min
L 18X10min, R9x10 min, G-9x10 min, B9x10 min-Astrodon Gen 2 I series Filters. Binned 1X1
Acquisition
Main Sequence Software-Sequence Generator Pro
Calibration and Stacking
Darks, Flats and Bias - Stacked and calibrated with PixInsight
Reprocessed Jan 2023
PixInsight, Affinity Photo v.2.03 and Bob Franke's CCDBand-Aid
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