4 hours star trail

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

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   6️⃣
   The result is available below, after more than 4 hours of exposure.

   My record is almost 13 hours of exposure. As an evidence for the long-exposure, you can see that the star Polaris has made half a circule, revealing half of the earth rotation.

   But, how can we reach such a long exposure time ?