Photography of Terry Danks

The Ring Nebula in Lyra - M57

Imaged from Nova Scotia, Fall, 2015

The small galaxy IC1296 lies 4 arc minutes away. The galaxy is about 240 million light years distant. M57 itself is about 2600 light years from Earth.

HaRGB Combination

Data

Altitude at culmination 78°

Airmass Value at culmination(sec z) 1.0

Taking Camera SBIG STL-11002XM Nova Scotia Fall, 2015 ~mag 6.4 - @-20C

Imaging OTA AGO 14.5" iDK

Equivalent focal length and ratio 2465@f/6.7

Mount Astro-Physics 1600GTO

Guiding PHD2/ONAG/Lodestar X-2

HaRGB Total integration time 16hrs, 50 mins Ha 17X30min, R18x10min, G-15x10min, B17x10min-Astrodon Gen 2 I series Filters and 5nm Ha. All binned 1X1

Acquisition Main Sequence Software-Sequence Generator Pro

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

Processed PixInsight, Affinity Photo v.2.0 and Bob Franke's CCDBand-Aid

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Data
Altitude at culmination 78°
Airmass Value at culmination(sec z) 1.0
Taking Camera SBIG STL-11002XM	Nova Scotia Fall, 2015 ~mag 6.4 - @-20C
Imaging OTA	AGO 14.5" iDK
Equivalent focal length and ratio	2465@f/6.7
Mount	Astro-Physics 1600GTO
Guiding	PHD2/ONAG/Lodestar X-2
HaRGB Total integration time 16hrs, 50 mins	Ha 17X30min, R18x10min, G-15x10min, B17x10min-Astrodon Gen 2 I series Filters and 5nm Ha. All binned 1X1
Acquisition	Main Sequence Software-Sequence Generator Pro
Calibration and Stacking	Darks, Flats and Bias - Stacked and calibrated with PixInsight
Processed	PixInsight, Affinity Photo v.2.0 and Bob Franke's CCDBand-Aid