TTSO20 – The Twentieth Trans-Tasman Symposium on Occultations – 6 April 2026, Tamworth, New South Wales, Australia.
(European time: Night of April 5/6)

Everybody interested in stellar occultation observations can join the symposium online after registration.

Programme and details here:
https://occultations.org.nz/website_d9bc6b2c/meetings/

#astronomy #occultation #citizenscience #space #science #asteroid #Moon

MEETINGS - Trans-Tasman Occultation Alliance

TTOA have run annual meetings – The Trans-Tasman Symposia on Occultations (TTSO) – since 2006. These are open to members and visitors on a range of occultation topics including training and information sessions. Apart from the ‘COVID’ years, these have been physical in-person meetings with online streaming/sharing increasingly engaging involvement with international participants. Pages on […]

Trans-Tasman Occultation Alliance

Journal for Occultation Astronomy 2026-02 is now available for free.

https://www.iota-es.de/JOA/JOA2026_2.pdf

This issue:
Occultation by (136108) Haumea on 2026 May 4, Trans-Neptunian object (225088) Gonggong, Tool for Fresnel diffraction integral, VAMOR+, Invitation to ESOP45 and more

Back issues:
https://www.iota-es.de/joafree.html

#astronomy #space #occultation #citizenscience #asteroid #journal #science

Join the 45th European Symposium on Occultation Projects at Observatoire Midi-Pyrénées in Toulouse, France, on 22. – 23. August 2026.

Alongside the conference with lectures and discussions, trips will be offered to tourist and scientific sites.

We will be glad to see you in Toulouse in person, but a free on-line participation via Zoom will also be offered after early registration.

Registration here:
https://esop45.iota-es.de/

#occultation #Moon #asteroid #space #citizenscience #astronomy

ESOP XLV – Toulouse – 45th European Symposium on Occultation Projects

IOTA/ES - Call for Observations:
Trans-Neptunian object (523738) 2014 SH349 will occult a 12.5 mag star UCAC4 498-006441 on 2026 Mar 05, ~21:15 UT. The expected maximum duration will be 23 s.

23 stations across Europe will try to observe the stellar occultation.
Extended error limits! Please observe all over Europe!

Details here:
https://cloud.occultwatcher.net/event/1889-523738-57173-648598-U006441

#occultation #space #astronomy #asteroid #citizenscience

A stellar occultation by Centaur (54598) Bienor was observed by 10 stations in the south of Europe on 2026 Feb 20.
5 stations reported a positive observation.
Congratulations to all observers! Well done!

https://cloud.occultwatcher.net/event/1876-54598-112865-650244-U041023

#astronomy #occultation #centaur #asteroid #space #citizenscience

OccultWatcher Cloud

The young crescent moon occulted Mercury today...as seen from the mountains of southern New Mexico.

First photo is a telephoto shot of the moon only a minute after it uncovered our innermost planet. This was taken in bright twilight as a wind and dust storm was easing up.

Second photo is a wider angle shot ten minutes later that includes Venus in the bottom third of the frame. The evening twilight sky colors are pallid because of the dust storm clouds billowing a mile below me on the floor of the Tularosa basin.

#Mercury #Moon #Crescent #Occult #Occultation #Astronomy #Twilight #Evening #Photography #Astrophotography

The first worldwide preliminary predictions for stellar occultations by asteroids in 2027 calculated by E. Goffin, Belgium, are now available.
Be aware, that errors bars of the predictions are very large for events so far in the future.

Overview sorted by regions (Europe is region 3) and instructions to use the files:

https://www.bedekkingen.vvs.be/predictions/asteroids2027/

Many thanks, Edwin! 👍️

#occultation #planets #space #astronomy #asteroid #citizenscience

The nature of ASASSN-24fw’s #occultation - modelling the event as dimming by optically thick rings around a substellar companion: https://academic.oup.com/mnras/article/546/3/staf2251/8471205?login=false -> Unseen planet or brown dwarf may have hidden 'rare' fading star: https://ras.ac.uk/news-and-press/research-highlights/unseen-planet-or-brown-dwarf-may-have-hidden-rare-fading-star
Heute Abend lohnt sich ein Blick zum Mond. Nach Sonnenuntergang kann man schön die Annäherung des Mondes an den offenen Sternhaufen der Plejaden (M45) beobachten.
Ab ca. 22:15 (anhängig vom Beobachtungsort) werden dann einige hellere Sterne auch bedeckt, was teilweise 1 Stunde dauert.
#plejaden #moon #bedeckung #occultation