Prediction archive
October 2026 predictions are available
12 asteroid events and 26 lunar observing locations are available in the current archive.
View October 2026 predictionsInternational Occultation Timing Association · India Section
Time an occultation.
Map asteroids and the Moon.
IOTA India provides predictions for stellar occultations by asteroids and the Moon—including grazing events across the Moon’s polar mountains—together with practical guidance for observers across India.
Monthly prediction archiveIndia-wide observing resourcesOpen citizen science
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Updates
Prediction archive
September 2026 predictions are available
34 asteroid events and 26 lunar observing locations are available in the current archive.
View September 2026 predictionsPrediction archive
August 2026 predictions are available
19 asteroid events and 25 lunar observing locations are available in the current archive.
View August 2026 predictionsFor observers
Made an occultation observation?
Use the established IOTA India reporting workflow and formats to submit your result.
Report an observationCommunity
Start observing with IOTA India
New observers are welcome. Learn the basics, find an event and connect with the community.
Join IOTA IndiaFrom observers across India
Recent observations
Multiple timed chords combine to constrain the asteroid's projected profile.
Browse observation records
Observation imagery from the existing IOTA India archive.
Visit the gallery
Timing measurements can be compared with shape models to improve physical constraints.
Visit the galleryLearn & follow
News, articles & resources
Video
Chasing Shadows: Occultation Observation Insights
An introduction to occultation observation for amateur astronomers.
Watch the sessionCitizen science
Why occultation observations matter
Understand how coordinated observations become useful measurements of distant bodies.
Read the observing guideObserver resource
International IOTA resources
Explore observing techniques, software, equipment guidance and international resources.
Visit occultations.orgIOTA India
Find an event visible from India
Start with the latest monthly asteroid and lunar occultation predictions.
Browse predictionsOccultation science
From prediction to measurement
Find an event
Choose an asteroid or lunar occultation predicted for your observing region.
Record precisely
Time the disappearance and reappearance of the star with synchronized equipment.
Report the result
Submit your observation so it can contribute to astronomical measurements.
Citizen science
Useful science is possible from your observing site.
By observing and precisely timing occultations, amateur astronomers have helped discover double stars, refine the shapes and orbits of hundreds of asteroids, and map the Moon’s polar regions.
IOTA India shares recommendations on equipment and observing techniques, coordinates reports, and supports publication of occultation data. Observers at every experience level are encouraged to take part.