Celestial hemisphere:  Northern  ·  Constellation: Canes Venatici (CVn)  ·  Contains:  Solar system body or event
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Comet C/2021 A1 Leonard passing Whale galaxy (NGC4631), Peter Komatović
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Comet C/2021 A1 Leonard passing Whale galaxy (NGC4631)

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Comet C/2021 A1 Leonard passing Whale galaxy (NGC4631), Peter Komatović
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Comet C/2021 A1 Leonard passing Whale galaxy (NGC4631)

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Description

Captured yesterday at 82% illuminated Moon. Comet C/2021 A1 is getting brighter and closer. Captured with ASI2600MC @ 3 min. subs. Processed in Pixinsight as following:
1. Calibration with Batch Script
2. With Comet Alignment tool use Registered lights from 1. to make Comet aligned lights
3. Integrate Comet aligned light to make Comet master
4. Use again Comet alignment tool with same files and add Comet master to subtract comet from Lights
5. Integrate Comet subtracted lights to make Star/Galaxy master
6. Merge Comet and Star master in Pixel math. You can try various combination. I merged them with following formula: 3*S + C, S being star master and C comet master.
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CS

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  • Comet C/2021 A1 Leonard passing Whale galaxy (NGC4631), Peter Komatović
    Original
  • Final
    Comet C/2021 A1 Leonard passing Whale galaxy (NGC4631), Peter Komatović
    B

B

Description: A cleaner version.

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Comet C/2021 A1 Leonard passing Whale galaxy (NGC4631), Peter Komatović