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#occultation

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Journal for Occultation Astronomy 2025-03 is now available for free.

iota-es.de/JOA/joa2025_3.pdf

This issue:
Call for Observations: occultation by Ganymede on 2025 Oct 14, measurement of the solar diameter during the partial eclipse in March 2025, Beyond Jupiter: (229762) Gǃkúnǁʼhòmdímà, new asteroidal satellite discoveries, invitations to meetings and more.

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

The webpage IOTA/ES - Call for Observations was updated today.

Predictions of occultations by minor planets of the main-belt, near-Earth asteroids and suspected binary asteroids are now listed until mid of July.
Events with four or more announced stations are added. These coverages promise good shadow profiles.

Please bookmark this webpage:

call4obs.iota-es.de/

Good luck for your observations!

IOTA/ES invites you to the 44th European Symposium on Occultation Projects (ESOP) in Poznań, Poland, on 2025 August 23-24.

Please register on the webpage of ESOP XLIV until July 31. If you want to join online via Zoom register as well to receive an access to the conference. Online participation is free of charge, donations are welcome.

Details are here:
esop44.iota-es.de/

See you in Poznań - live or on screen!

Our webpage with calls for observations of stellar occultations by asteroids across Europe was updated today.

Occultations by main-belt asteroids, suspected binary asteroids, slow-rotators and even by a comet are now listed until June 15.
Events with four or more announced stations are added. These coverages promise good shadow profiles.

Plan your own observation now.

call4obs.iota-es.de/

Do you want to know how an observation of a stellar occultation by an asteroid is done? Watch P. Nosworthy's (Australia) recording of his live broadcast of an occultation by asteroid Swissair and you will get an impression of this exiting field of citizen science. Broadcast starts at 5:05.

youtube.com/watch?v=_rSmbqoeQ5U

Shadow profile of slow-rotating asteroid (144) Vibilia measured by 6 stations in Poland and Germany on 2025 April 4. One additional observer reported a negative observation from the northern edge of the shadow.

cloud.occultwatcher.net/event/

The team of SODIS has calculated a preliminary profile of the asteroid of 134 x 134 km.

The dashed line shows the predicted centre line of the shadow. Another very accurate prediction.