Photography of Terry Danks

vdB4 - A reflection Nebula in Cassiopeia located in the field with the open cluster NGC225 and the dark nebula LDN1291

Imaged from Nova Scotia, Summer, 2024

RGB Combination - Summer, 2024

Data

Altitude at culmination 73°

Minimum Airmass Value (sec z) 1.0

Mean FWHM with 14.5" 2.2 arc-s, Mean eccentricity 0.42

Taking Camera SBIG STL-11002XM Nova Scotia Summer, 2024, ~mag 6.4 - @-20C

Imaging OTA AGO iDK 14.5"

Equivalent focal length and ratio 2465mm f/6.7

Mount Astro-Physics 1600GTO

Guiding PHD2/ONAG XM/Ultrastar

RGB Combination - Total integration time 11 hrs 30 mins R-23x10 min G-23x10 min, B-23x10 min, Astrodon Gen 2 I series RGB Filters. All binned 1X1

Acquisition Main Sequence Software-Sequence Generator Pro

Calibration and Stacking Darks, Flats and Bias - Stacked and calibrated with PixInsight

Processed 2023 PixInsight, Affinity Photo v.2.5.3 and Bob Franke's CCDBand-Aid

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Data
Altitude at culmination 73°
Minimum Airmass Value (sec z) 1.0
Mean FWHM with 14.5" 2.2 arc-s, Mean eccentricity 0.42
Taking Camera SBIG STL-11002XM	Nova Scotia Summer, 2024, ~mag 6.4 - @-20C
Imaging OTA	AGO iDK 14.5"
Equivalent focal length and ratio	2465mm f/6.7
Mount	Astro-Physics 1600GTO
Guiding	PHD2/ONAG XM/Ultrastar
RGB Combination - Total integration time 11 hrs 30 mins	R-23x10 min G-23x10 min, B-23x10 min, Astrodon Gen 2 I series RGB Filters. All binned 1X1
Acquisition	Main Sequence Software-Sequence Generator Pro
Calibration and Stacking	Darks, Flats and Bias - Stacked and calibrated with PixInsight
Processed 2023	PixInsight, Affinity Photo v.2.5.3 and Bob Franke's CCDBand-Aid