Shoot 2024-10-17-103212 — philthompson.me

Birds
Mandel

Shoot 2024-10-17-103212

I was lucky to have clear skies on October 12th for viewing comet C/2023 A3 (Tsuchinshan–ATLAS). A ridge on the edge of town offers clear views to the west, and shortly after I arrived a few other folks showed up to see the comet. We had to wait quite a while to get a good view, around an hour after sunset! The comet wasn't terribly bright but it could still be found by eye. By the time the sky was starting to darken the comet was setting and was pretty dim. Most of the photos here are single exposures of a few seconds each.

My "birds in review" collages can be found here.

Signature

📄 hashes-2024-10-17-103212.txt

📄 hashes-2024-10-17-103212.txt.sig

The above hashes-<date>.txt file contains SHA-256 hashes of all the photos from this shoot. The hashes-<date>.txt.sig is a signature of that hashes file, created with my PGP key. The signature file itself was written to both the Bitcoin Cash and Algorand blockchains, in the OP RETURN and Note fields respectively, using the transactions below. In short, this proves that these photos and the signature both existed at the time the transactions were written to the Bitcoin Cash and Algorand blockchains. This blog post has more details.

view the BCH tx on blockchair.com: b0a3faab9b26ce2d1b833d259de3a33e2dead208846920fbe63fa2e680d94afa

view the ALGO tx on explorer.perawallet.app: QVJIZH52N66XULO327T3RVRAODOLMOHRZWMTC2MORK6JGYTQJR3Q

This is a stack of 14 frames of 1.6s each, at 150mm and ISO 2000. I removed the sky gradient using Siril, and did some tweaking in Photoshop and Lightroom. I'll publish this one on my AstroBin page and update this gallery with a link.