C/2021 A1 Leonard 30/12/2021
![](https://www.xiulong.it/tianwensheying/wp-content/uploads/2023/10/C2021-A1-Leonard-iDK_Namibia-Skygems-MergeMosaic_BIN1_BIN2-PP-annotat-1024x343.jpg)
Comet Leonard C/2021 A1 from iDK Namibia remote telescope, Skygems.
Astrobin: https://www.astrobin.com/w0ah2q/
![](https://www.xiulong.it/tianwensheying/wp-content/uploads/2023/10/C2021-A1-Leonard-iDK_Namibia-Skygems-MergeMosaic_BIN1_BIN2-PP-1024x343.jpg)
Very hard but completely stocked within this processing; mosaic is obtained by 4 different kind of imaging, at different binning. BIN2 mosaic in LRGB consisted in 3 framing. one for the comet head, another framing for the middle comet tail, third framing for distal part of comet tail.
Bin1 Luminance set finally integrated within mosaic.
Final star & starless integration in Photoshop, with numerous adjustement layers and pixel fixing needed.
Dataset available for free from Skygem network here: https://forum.skygems-observatories.com/d/104-new-year-present-c2021-a1-data-set
Calibration is not quite easy as Skygems archives missing proper dark for right calibrated masterflat creation.
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