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Imaging camera:ZWO ASI1600MM-Cool
Dates:Nov. 5, 2018 , Nov. 6, 2018 , Nov. 8, 2018 , Nov. 11, 2018 , Nov. 12, 2018 , Feb. 15, 2019 , Feb. 16, 2019 , Feb. 17, 2019 , Feb. 18, 2019 , Feb. 26, 2019 , Feb. 27, 2019 , Feb. 28, 2019 , Feb. 15, 2020 , March 17, 2020 , March 18, 2020
ZWO B 1.25": 68x120" (gain: 76.00) -25C bin 1x1
ZWO G 1.25": 45x120" (gain: 76.00) -25C bin 1x1
Optolong Ha 7nm: 124x300" (gain: 139.00) -25C bin 1x1
Hutech IDAS 1.25" LPS P2: 66x300" (gain: 139.00) -15C bin 1x1
Hutech IDAS 1.25" LPS P2: 467x120" (gain: 76.00) -15C bin 1x1
ZWO L 1.25": 32x300" (gain: 139.00) -15C bin 1x1
ZWO R 1.25": 34x120" (gain: 76.00) -23C bin 1x1
Integration: 39.0 hours
Avg. Moon age: 16.66 days
Avg. Moon phase: 42.80%
Bortle Dark-Sky Scale: 6.60
Astrometry.net job: 3333579
RA center: 9h 55' 47"
DEC center: +69° 19' 51"
Pixel scale: 1.101 arcsec/pixel
Orientation: 89.495 degrees
Field radius: 0.712 degrees
Data source: Mix of multiple source
This is another 2 season shooting.
It began in the 2018-2019 season with shooting 2 panels with the 200p dobson ota put on the EQ6-R. I shot 8-9h of luminance on each panel from home, but the gradients due to light pollution killed any attempt of revealing the IFN. Nevertheless, I continued a few months later shooting some RGB and Ha data with the smaller 150PDS newton to have a coloured image.
Then, this season I had one night the AstroProfessional 102mm FPL51 equipped refractor with me and I put it to work. This time I was at a dark location and the IFN revealed easily. I was encouraged seeing the dust decently in less than 3h of exposure so 2 and 3 days (nights) ago I took out the scope again to a less dark location, but still decent skies at zenith and I shot about 5 more hours.
I combined all the refractor data which was intended to be used for the background and all the newtonian luminance for high resolution highlights.
I then combined these trying to mask and hide the big bloated stars from the less than perfect refractor. To these I added colour data from shot with the other newton.
The process was tedious so some artifacts are still visible. 8h of luminance with a 4" refractor is also not too much so the IFN is quite noisy.
Perhaps I won't be visiting these galaxies again until I switch to a larger photon hoover.
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