Imaging telescopes or lenses: Sigma 17-50mm f/2.8 EX DC OS HSM
Mounts: Sightron nano.tracker
Software: Pleiades Astrophoto S.L. PinInsight · APT
Dates:July 21, 2020
Frames: 185x20"
Integration: 1.0 hours
Avg. Moon age: 0.82 days
Avg. Moon phase: 0.77%
Astrometry.net job: 3698317
RA center: 9h 59' 35"
DEC center: +53° 9' 21"
Pixel scale: 18.115 arcsec/pixel
Orientation: 54.302 degrees
Field radius: 13.597 degrees
Resolution: 4656x2743
Data source: Traveller
I had a hard time getting a starless image with just rejection without losing a lot of SNR in the comet as well so I decided to take a slightly different approach. Details below.
185x20" = 1,03 h
Star alignment and integration.
Create starmask with starnet++ from the star-aligned integration
Create starless images: binarize starmask, clean up with clone stamp, run DefectMap and SimplexNoise (with starmask) on each frame with containers.
Apply comet registration on the starless images.
Integrate starless images to get starless comet image without streaks, cleanup comet residues with clonestamp.
Use CometAlignment to subtract the comet image from each star aligned frame and integrate the star aligned frames.
Use Pixmath (2*comet+stars) to combine both images.
Crop, TGV+MMT denoise, PCC, SCNR. Extract luminance for later. ArcsinhStretch, Curves
With the extracted L: HT, LHE
Combine the two images with LRGBCombination, Curves, ACDNR and MMT to clean up.
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