The International Occultation Timing Association

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IOTA AUSTRALASIA

Information Site for Lunar Occultations & Grazes

Last Updated 25 May 2023

WARNING! Information and e-mail addresses contained herein, are for scientific use only. By entering this site, you agree that you will use this data only for lawful purposes and that, under no circumstances will you use this data to: allow, enable, or otherwise support the transmission of mass unsolicited, commercial advertising or solicitations via direct mail, electronic mail, or by telephone.

MISSION STATEMENT

We encourage, promote and facilitate the observation of occultations and eclipses
We provide predictions for grazing occultations of stars by the Moon
and predictions for occultations of stars by asteroids and planets
We also provide information on observing equipment and techniques,
and we report to our members about observations made

IOTA GOALS AND OBJECTIVES

To promote scientific research and discovery using occultation related methods
To conduct research at the local, regional and international level
and to publish results of studies in popular and scientific journals
To stimulate public awareness of astronomical phenomena such as (but not limited to) solar and lunar eclipses and occultations of stars by minor planets, the Moon, and other solar system bodies
To improve lunar profile data through timing of grazing and total occultations
To determine shapes and sizes of minor planets and comets through timing of occultations of stars by these objects
To discover evidence of new, and confirm characteristics of previously discovered, satellites/companions of minor planets

The Value of Lunar Occultation Timings and Observations

Worldwide Upcoming Bright Star Occultation Events

Observers are encouraged to download the Occult software
to generate predictions for their areas, of fainter occultations

Check "Regional Information on Events" below for more information on occultation/graze events for local circumstances

How to read the country codes and prediction format

07 May - Occultation of σ Sco - 2.9m - w USA, w Canada
07 May - Occultation of δ Sco - 2.3m - South America
10 May - Occultation of τ Sag - 3.3m - s Africa, Madagascar
17 May - Occultation of Jupiter - -1.9 - USA, Canada, Greenland
26 May - Occultation of η Leo - 3.5m - central South America
30 May - Occultation of η Vir - 3.9 - Scandinavia
30 May - Occultation of γ Vir - 2.8m - w Australia
03 Jun - Occultation of δ Sco - 2.3m - Australia, New Zealand, s South America
06 Jun - Occultation of τ Sag - 3.3m - ne So Americca, Easter Island
06 Jun - Occultation of φ Sag - 3.2m - s South America
23 Jun - Occultation of η Leo - 3.5m - e Australia, New Zealand
26 Jun - Occultation of η Vir - 3.9m - nw Russia, Alaska
23 Jul - Occultation of η Vir - 3.9m - Middle East, w Russia
28 Jul - Occultation of δ Sco - 2.3m - Australia
28 Jul - Occultation of σ Sco - 2.9m - se Asia
31 Jul - Occultation of τ Sag - 3.3m - n South America
19 Aug - Occultation of η Vir - 3.9m - nw South America

2023 Predictions

Concerning 2023 IOTA Predictions Must Read(pdf format)
2023 Worldwide Total Occultations of Bright Stars
2023 Occultation of Planets by the Moon
2023 Total Occultations of Bright Stars for 40 North American Cities
2023 North America Graze Tables and Maps - D. Dunham
Eclipse Maps and Weather
Eclipse Information from Eclipse-Chasers.com

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)

Helpful Information

I.O.T.A.'s Primary Site
I.O.T.A. Membership Application
IOTAoccultations@groups.io - Discussion Maillist
"Chasing the Shadow: The IOTA Occultation Observer's Manual
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

Occult Software and Related Information

Occult Prediction Software
Tips for using Occult by David Dunham (pdf file)
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 23 Mar 2023)

OccultWatcher Software

Basics of Total Occultations

Basic Information and How to Obtain Predictions
BeeperSync - An Alternative WWV Internet Based Timing Source
How to Report Observations
The Prediction Format for Total Occultations - [pdf format]
The Value of Total Lunar Occultations
Timing & Location Accuracies for Observations

Basics of Grazing Occultations

The Grazing Occultation
IOTA Standard Stations
North American city coordinates
Archive of Observed Graze Profile Reductions

Regional Information on Events - (external links)

Mid-Atlantic Occultations - D. Dunham
Kansas-Missouri Area - R. Sandy
Upper Midwest- MN, IA, ND, SD and WI
San Francisco Bay Area - D. Breit
Houston Area - P. Maley
Occultations for Belgium, France, Spain, and Portugal - J. Schwaenen
Central America/South America (in Spanish)
Brazil by Breno Loureiro Giacchini (in Portuguese)

If you have a local URL for your area, send information to the webmaster for inclusion

Use of Video on Timing Events

A Light Weight Portable Video Setup - 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

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

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

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