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

Journal for Occultation Astronomy 2026-01 is now available for free.

https://www.iota-es.de/JOA/JOA2026_1.pdf

This issue:
Observation of Occultation by (426) Hippo, Grazing Lunar Occultations of Stars and Planets in 2026, Beyond Jupiter: (121725) Aphidas, News, Report of IOTA's 43rd Meeting in September 2025 and more

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

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

IMPORTANT UPDATE:
NO OCCULTATION of alpha2 Lib by asteroid (362) Havnia on 2026 Jan 16.

The calculated star position used for the prediction misses proper motion values. New prediction shows that the shadow passes north of the Earth by 0.2 Earth radii.

The Call for Observations will be removed.

Sorry about that. 😕
But better to know in advance.

#astronomy #space #citizenscience #occultation #asteroid