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Imaging telescope or lens:Explore Scientific 80 ED TRIPLET F/6 APO
Imaging camera:ZWO ASI 1600MM Cooled Pro
Mount:Orion (Synta) Atlas EQ-G
Guiding telescope or lens:Explore Scientific 80 ED TRIPLET F/6 APO
Guiding camera:ZWO ASI 290MM mini
Focal reducer:Explore Scientific 2" Field Flattener
Integration: 11.6 hours
Flat darks: ~25
Avg. Moon age: 15.55 days
Avg. Moon phase: 2.09%
Bortle Dark-Sky Scale: 5.00
Astrometry.net job: 2788144
RA center: 21h 1' 30"
DEC center: +67° 55' 33"
Pixel scale: 1.582 arcsec/pixel
Orientation: 273.297 degrees
Field radius: 1.163 degrees
Locations: backyard, Chico, CA, United States
Data source: Backyard
I have tried my hand at this object with less than, let's say stellar results (bah duum bop;) This time I decided solve my glaring inadequacies by deluge of data. This was captured each night over the course of a week and a half. I had some obstacles to overcome. My first set of data was besieged by camera sag. I could not get that damn camera to fit snuggly within the compression ring. So out comes the pliers, problem solved. Next, I had trouble with getting automatic focusing to work with SGP. The sequences were abruptly ending mid sequence. I "solved"it by fiddling with the focus steps. It is the ugliest, zig zaggiest focus curve imaginable. But it worked. Finally, I struggled to get the SGP notifications to work. I ended up having to create a new gmail account to get that sucker going. Finally, after all the tweaking, fiddling and adjusting, wouldn't you know...high clouds. so this is the data set I ended up with.
LRGB stacked in Pixinsight using BPP.
Star Alignment to Lum
Dynamic Crop to Lum saved process for RGB
R G B were Linear Fit to red.
Channel Combination RGB
Automatic Background Extraction of RGB
Photometric Color Calibration of RGB
Jon Rista's process of noise reduction using TGV Denoise and MultiScaleMedianTransform
Stretch using a small Histogram Transform to just bring out the brighter stars then a Masked Stretch at 160 background.
Automatic Background Extraction
Deconvolution using Kayron Mercieca process
Jon Rista's NR process again
Stretch using light Histogram Transform to jus bring out brighter stars and then Maksked Stretch at 110 background.
LRGBCombination with 50 lightness and 28 saturation
SCNR at 80%
Jon Rista ACDNR technique
HistogramTransform to clip some of the "black tail" to improve contrast
HDRMultiscaleTransform using combined star_mask+range_mask that protects the background
Morphological Transformation with 3 iterations and 40% using standard star_mask
Curves to boost contrast and saturation
light editing using the RAW filter.
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