Worldwide Asteroidal Occultation Observations and Resources

updated 2020 Apr 01


Primary IOTA Occultations Webpage

Primary IOTA Occultations Observing Information Website


  Observational Results

Australia/New Zealand

RASNZ Occultation Manual



Results page

North American Results page


North American Asteroidal Occultation Resources page

IOTA - Central & South America


LIADA (Spanish)

REA Occultation Section (Portuguese)


The Index of Worldwide Asteroidal Occultation Reports

compiled by Hayato Watanabe


Online Resources for Asteroidal Occultation Observations






  Software (free)


  Asteroidal Occultation Predictions Website


Derek Breit's Worldwide Interactive Maps,

Stations and Pre-Point Star Lists

(includes link to IOTA's FREE Observers' Manual -

also available to the right)


Occultations by Kuiper Belt and

Trans-Neptunian Objects

MIT Predictions

Paris Observatory Predictions

(occultations for different years start about five sections below top)


EAON - Jean Schwaenen


Go to YOUR world region link (above) to get Report Forms designed for your use.


IOTA Report Forms

These Excel Forms are for use in

North America and Australia/New Zealand ONLY


FREE IOTA Observers' Manual

Chasing the Shadow:

The IOTA Occultation Observer's Manual



Recommended Equipment Page

The "Mighty-Mini" video camera system by Scotty Degenhardt

Text document   Larger Picture

Go to the North American page for MUCH more information on Scotty's systems!


Important:  KIWI-VTI Startup Procedures

by Dave Gault


KIWI-OSD Users' Manual

Dave Gault's Note


KIWI-OSD Firmware Upgrade 


JXD990 - 8000 Video Recorder Manual


IOTA Sofware Page




LiMovie Info 

User Webpage (NEW!)

LiMovie (latest version

LiMovie (version    

Using LiMovie (Word file)

Notes on Use of New Version (text)

LiMovie download site (old information)

LiMovie Average (zip file)

Using LiMovie Average with Mutual Events (text)




(with link to new Registax 6)

Using Registax with your Occultation Videos

Short Tutorial for Registax 6


Miscellaneous Archived


Where can I find data

from previous events?

Videos and more

Miscellaneous Information

See samples of actual

asteroid occultations

Satellite Pictures

and Forecasts

Use these maps and forecasts

to help plan your observations.


IOTA Awards Page



W. J. Merline Award for Discovery of an Asteroid Moon by Occultation (MADAMO)

Video Astrometry

by Dave Herald


The Transit of Venus


Asteroid Pronunciations

Topographic Maps


IOTA Lunar Occultation Site


An Occultation Observer Primer

(text file)


Nautical Almanac Office Technical Note 34

by Gordon Taylor

August, 1974



NASA Asteroid Data Set

Introductory Pages




MPOCC Data Set



Euraster - Eric Frappa





Dedicated YouTube page

containing Asteroid and Lunar

Occultation videos plus

others that are related


David Dunham's Video Page

Dave Gault's Video Page


Tutorial on the Use of OccultWatcher

by Ted Blank



Images from Previous Solar Eclipses

provided by Bob Sandy


GOES East 1-km Images

Astro Meteo (N. America)

Meteo Blue (Europe)

Detailed Satellite Images


Western North America

Weather Satellite


North America Weather Satellite


FAQ Binary and Asteroid Satellites



How do I TIME an Occultation?

Can I time an occultation with a CCD CAMERA?


How do I make observations and why are they important? 

by Paul Maley


How to Download and Reduce Asteroid Occultation DV Tapes

Richard Nolthenius



Satellites of Asteroids


Jerome Berthier's Occultation Predictions

by Asteroid Satellites


Evidence for Asteroid Satellites

by Paul Maley

(presentation to Binary Asteroids Workshop - 5.4 Mb)


The "Hercules" Club

Observers who have positioned themselves between the two shadows

of a double asteroid,

so as to observe an occultation by neither component.



    Asteroid Diameters from Occultations by John Broughton