One of my first star trail, which appears on APOD in 2009 credits: A. Santerne / OHP-CNRS

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   Dr. Alexandre Santerne 🌍 (alexsanterne@astrodon.social)'s status on Sunday, 18-Dec-2022 23:45:37 JST Dr. Alexandre Santerne 🌍

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   11- transfer all frames to a computer
   12- use dedicated software to build the startrail. I used softwares like StartStaX, Startrails, etc... depending on whether you are on windows, mac or linux.
   (13- submit it to APOD: https://apod.nasa.gov/apod/ap090314.html)

   that's it.

   So basically, it's 5-10 minutes preparation. Several hours to wait, 5-10 minutes to transfert all the frames to a computer, 5 minutes to process them. ⌚