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The International Occultation Timing Association

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IOTA MAIN SITE
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Information Site for LunarOccultations & Grazes

Last Updated 12 NOV 2025

Beginning 2026, occultations of bright stars will cease to be listed here. Those who wish to observe these events can receivepredictions for your location, including a PDF file on how to read them, by emailing me at webmaster (at) lunar-occultations (dot) com the following information:
  1. Telescope size
  2. Longitude, Latitude, Elevation
  3. Experience

2025 Predictions

Concerning 2025 IOTA Predictions Must Read(pdf format)
Lunar total occultation material from the 2025 RASC Observer’s Handbook
Zip file of total occultations in the RASC Handbook
2025 Worldwide Total Occultations of Bright Stars
2025 Occultation of Planets by the Moon
2025 Total Occultations of Bright Stars for 40 North American Cities
2025 North America Graze Tables and Maps - D. Dunham
Eclipse Maps and Weather

Asteroid Occultation Information

Steve Preston's World Wide Prediction Site
Derek Breit's Regional Asteroid Path Maps for USA
North American Asteroidal Reference Homepage
Asteroidal Occultation Results for North America
Worldwide Results Home Page
Report Form For Asteroid Observations
Japanese Astroidal Prediction Site (Japanese)
Japanese Astroidal Results (English)

Lunar Impacts and IOTA

NASA/Marshall main lunar impacts Web site
B. Cudnik's ALPO lunar meteor impacts Web site
D. Dunham's Impact Page (historical, 1999 & 2001, & earlier efforts)


The Occultation Observer's Handbook by Robinson & Povenmire
NWS Current Weather & Forecasts
Time Conversion Tables - UTC to Local for USA
World Time Zone Map
IOTA Annual Meeting Minutes

Occultation Software and Related Information

Occult Prediction Software
Tips for using Occult by David Dunham (pdf file)

Occult 4 input file - Worldwide occultations of stars by major planets and their satellites, and stars to mag. 10.5 by asteroids
(Note: right click on link to do a save as to your computer. Then import into Occult 4)

Occult 4 input file - North America for occultations of stars by major planets and their satellites, and stars to mag. 12.0 by asteroids
(Note: right click on link to do a save as to your computer. Then import into Occult 4)

Dr. Eberhard Riedel'sGRAZPREP software anddocumentation

Lunar Report Generator
Occult/IOTA Groups.io - Discussion Maillist
How to Use Occult 4 to Predict Comet Occultations
The ZC Star Catalog (not to be interfaced with Occult)
Expanded Site Files (updated file on 06 Jul 2024)

OccultWatcher Software

Use of Video on Timing Events

A Light Weight Portable VideoSetup - by R. Nugent
Richard Nugent's System - by D. Dunham
Tom Heisey's Video Setup (PDF)
"Millisecond Video Timing for the Masses" by S. Herchak
Finding Limiting Mag for Visual/Video Camera Observations

KIWI-OSD and IOTA-VTI Time Inserters

LiMovie measurement tool for video occultations (the most stable version)

Miscellaneous Stuff

I.O.T.A. Tax Information/Expense Report [pdf format]
Additional Reference Reading Material

StarAward


astronomylinks.com
astronomy and space links,shortcuts, favorites and bookmarks.

This site maintained for IOTA by Rob Robinson, Bonner Springs KS
Send comments and mail toWebmaster
Send comments and mail toI.O.T.A.President, Steve Preston
IOTA Administration, emailI.O.T.A.

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