Imaging telescopes or lenses: Lacerta Newton ohne Namen 200/800
Imaging cameras: Atik 460 EX Mono
Focal reducers: Lacerta GPU
Software: PixInsight · CCDciel · Darktable
Filters: Baader Planetarium Red 1.25" · Baader Planetarium Blue 1.25" · Baader Planetarium Green 1.25" · Hutech IDAS 2" LPS P2
Accessory: Berlebach Planet
Dates:Oct. 14, 2017 , Oct. 15, 2017 , Oct. 16, 2017 , Oct. 18, 2017
Frames:
Baader Planetarium Blue 1.25": 24x180" -15C bin 1x1
Baader Planetarium Green 1.25": 51x180" -15C bin 1x1
Baader Planetarium Red 1.25": 38x180" -10C bin 1x1
Baader Planetarium Red 1.25": 29x180" -15C bin 1x1
Integration: 7.1 hours
Darks: ~10
Flats: ~10
Bias: ~100
Avg. Moon age: 26.01 days
Avg. Moon phase: 15.27%
Astrometry.net job: 1793222
RA center: 22h 37' 22"
DEC center: +34° 25' 37"
Pixel scale: 0.834 arcsec/pixel
Orientation: 208.454 degrees
Field radius: 0.410 degrees
Resolution: 1824x1529
This is my second attempt on this great galaxy. Due the 800mm FL the FoV is a bigger, so all those surrounding small galaxies in the field are visible too.
Also it's the first light for my first newtonian telescope.
I've created a 2x drizzle Lum out of all the RGB data , processed it and scaled to 70%.
This time the drizzling was possible with Gauss and Variablesize kernels, without seeing drizzle artifacts.
The white balance was done by the photometric script from PI. A really great tool.
After a second NGC7331 attempt, my personal feeling tells me, the blue component of this galaxy is not as strong as in other spirals. In regard of color and size, NGC7331 seems to match the Andromeda galaxy.
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