AYATSUKA Yuji (綾塚 祐二)
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ayatsuka.bsky.social
AYATSUKA Yuji (綾塚 祐二)
@ayatsuka.bsky.social
Atmospheric Optics, Science Fiction, Human Computer Interaction
https://www.asahi-net.or.jp/~cg1y-aytk
Pinned
Finally, my paper on "Sky-Color Regression" has been published!
Ayatsuka, Y.: Revealing halos concealed by cirrus clouds, Atmos. Meas. Tech., 17, 3739–3750, doi.org/10.5194/amt-..., 2024
Revealing halos concealed by cirrus clouds
Abstract. Many types of halos (including arcs) appear in the sky. Each type of halo corresponds to the shape and orientation of ice crystals in clouds, and reflects the state of the atmosphere; theref...
doi.org
Reposted by AYATSUKA Yuji (綾塚 祐二)
🔭 A Super Lunar Corona

Image Credit & Copyright: Eric Houck

star.ucl.ac.uk/~apod/apod/a...
November 12, 2025 at 8:00 AM
Reposted by AYATSUKA Yuji (綾塚 祐二)
🔭 Comet Lemmon Beyond Lomnický Peak

Image Credit & Copyright: Robert Barsa

star.ucl.ac.uk/~apod/apod/a...
November 4, 2025 at 8:00 AM
Beer!
October 17, 2025 at 3:29 PM
22-degree halo, circumscribed halo, parhelion, parhelic circle, 46-degree halo
September 22, 2025 at 6:20 AM
Reposted by AYATSUKA Yuji (綾塚 祐二)
🔭 A Two Percent Moon

Image Credit & Copyright: Marina Prol

apod.nasa.gov/apod/ap25083...
August 30, 2025 at 8:00 AM
Don't look at the sun directory, when you watch phenomena near the sun!
September 2, 2025 at 9:21 AM
Reposted by AYATSUKA Yuji (綾塚 祐二)
🔭 Fishing for the Moon

Image Credit & Copyright: Marco Bellelli

apod.nasa.gov/apod/ap25082...
August 23, 2025 at 8:00 AM
pyramidal halos! (9, 18, 20, 22, 23, 24, 35, 46)
August 26, 2025 at 9:31 AM
The secondary rainbow appeared without the primary rainbow (because the sun's altitude was too high).
August 21, 2025 at 12:11 PM
Pyramidal crystals and the surfaces through which the rays enter and exit for each odd radius halo. [prototype]
August 10, 2025 at 10:01 AM
Pyramidal halos!
July 25, 2025 at 2:01 PM
Cloud iridescence
July 20, 2025 at 4:59 AM
Pyramidal halos! (9-, 20-, 24-, 35- degrees) + (normal 22- and 46-degree halos
July 19, 2025 at 7:37 AM
Summer greetings
July 18, 2025 at 3:40 AM
Circumhorizontal arc
July 10, 2025 at 4:24 AM
22-degree halo, circumscribed halo, 46-degree halo
June 29, 2025 at 5:28 AM
Beer!
June 26, 2025 at 1:02 PM
Tea-colored lantern? :-)
June 23, 2025 at 12:16 PM
Summer solstice
June 22, 2025 at 12:48 AM
22-degree halo (with a faint circumscribed halo?)
June 14, 2025 at 1:24 AM
Reposted by AYATSUKA Yuji (綾塚 祐二)
一緒に本を育てた証を、本に刻んで残しませんか?

不眠天気という本を書いています。
先読みをやりますので、ぜひ意見・感想等を頂戴したいです。ご参加いただいた方は巻末にお名前を掲載します。どなたでもご参加大歓迎です。

ご協力よろしくお願いしますー!

申込:https://forms.gle/zuWUgrjPw5MZaR3aA
June 14, 2025 at 1:19 AM
Nejibana
June 8, 2025 at 10:02 AM
Reposted by AYATSUKA Yuji (綾塚 祐二)
🔭 Rainbow Airglow over the Azores

Image Credit & Copyright: Miguel Claro (TWAN); Rollover Annotation: Judy Schmidt

apod.nasa.gov/apod/ap25060...
June 3, 2025 at 8:00 AM
Reposted by AYATSUKA Yuji (綾塚 祐二)
🔭 Mars in the Loop

Image Credit & Copyright: Tunc Tezel (TWAN)

apod.nasa.gov/apod/ap25053...
May 30, 2025 at 8:00 AM