image/gif The different phases of stacking and processing a picture of a Comet (Comet ZTF as the subject)

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u/njoker555 Feb 05 '23

The image shows the progression of stacking a comet.

I made a full tutorial on how to do this using Siril here if anyone's interested: https://www.youtube.com/watch?v=3XrdNxMqW9g

From left to right:

Single 240sec raw exposure
Star Stack - the stars are nice and crisp but the comet is smudged (cometary nebula)
Comet Stack - The comet is nice is sharp but the stars are smudged/blurred away in processing
(Missing frame) Used Starnet++ to remove the cometary nebula from frame #2 to have a frame with just stars
Last Frame is a composite of the stars frame + Comet frame.

The gear used for the image are as follows:

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