North American Asteroidal Occultation Program
Updated 2020 Mar 06
UTC Date and Time
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Primary North American Coordinator
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FREE Software Downloads
Check the bottom of the IOTA YouTube page for tutorials on the use of many of these programs
Occultation Prediction Software by Dave Herald
Occultation Planning Software by Hristo Pavlov
(highly recommended planning
software, informs you of
software for measuring occultation light curves Version 0.9.98.2a zip file (latest version)
software for measuring occultation light curves and photometry
OccuRec is a video recorder for Windows that has been specifically created to provide better options for recording Asteroidal Occultations
Occular 4.0 Occular 4.0 Download File (zipfile) Installation Instructions (text file)
Important Paper! Analysis of Camera Delay Corrections (Word file) Analysis of Camera Delay Corrections (PDF file) by Tony George
video editing software
video editing software
R-code Occultation Timing Extractor (R-OTE) v. 4.6.0 (105 Mb file) 28 August 2017 update
PyMovie |
Important: KIWI-VTI Startup Procedures by Dave Gault
The "Mighty-Mini" Videocamera System by Scotty Degenhardt
NEW!! by Ted Blank
Timing Using CCD Drift Scanning
The Effects of Optical Miniaturization on Occultations by Scott Degenhardt (webpage)
My Metis Meteor by Scott Degenhardt
Multi-Station Occultation Observing (7.5 Mb PP) by Scotty Degenhardt
( 850kb ZIP file)
How Scotty Degenhardt Sets Up Multiple Remote Stations (16 kb ZIP file)
How to Download and Reduce Asteroid Occultation DV Tapes Richard Nolthenius
WWVB-based video time inserter John Wright
JXD990-8000 Video Recorder Manual
"Maxi" Mount for use with 120mm refractor (August 2013 update)
Spreadsheet to Determine D and R times from Canon ZR Date Code (Excel)
How to Reduce Time-Stamped Videos - KIWI-VTI (Word) How to Reduce Time-Stamped Videos - IOTA-VTI (Word) (uses above Excel Form)
How To Basics. Using various Software programs. Richard Nolthenius
Suggestions for Cold Weather Deployments (zipfile)
Video Camera and Focal Reducer Connections
Camera and focal reducer Hyades comparisons (David and Joan Dunham)
Observers who have positioned themselves between the two shadows of a double asteroid, so as to observe an occultation by neither component.
with many examples of previous events as well Tutorials an using various software programs |
An Occultation Observer Primer (text file)
An Occultation Timing Primer Word HTML
Introduction to Occultations (pdf) Paul Maley, Richard Nugent
Occultations by Asteroid Satellites
Lunar Occultations of Comets Word Text
The IOTA Occultation Observer's Manual
by David Dunham - April 13, 2008 ( 5 Mb)
Richard Nugent's Solar Eclipse Summary
---------- Minor Planet Bulletin articles ---------- A Trio of Well-Observed Asteroidal Occultations in 2008 Minor Planet Bulletin, 2009 July-Sept. pp. 98-100
Occultations by 81 Terpsichore and 694 Ekard in 2009 at Different Rotational Phase Angles Minor Planet Bulletin, 2010 Oct-Dec pp. 140-142
Several Well-Observed Asteroidal Occultations in 2010 Minor Planet Bulletin, 2011 Oct-Dec pp. 200-204
Occultation Evidence for a satellite of the Trojan asteroid 911 Agamemnon Vol. 87, October 2013, pp. 78-84 Full text (as PDF download) available from
Asteroidal Occultation by 82 Alkmene and the Inversion Model Match Minor Planet Bulletin, 2015 Apr-Jun pp. 129-131
---------- JDSO New Double Star articles ---------- (select Archives) Vol 6, No 2 1049 Feodosia Vol 7, No 2 675 Ludmilla Vol 7, No 3 790 Pretoria Vol 7, No 3 160 Una Vol. 8, No. 4 336 Lacadiera
----------------------------------------------------- Review of the 29 May Eudora Occultation (by D. Dunham)
Gravic Astronomy Workshop - Saturday, October 8th (proposed agenda) Summary of the Astronomy Workshop at Gravic
Basic Information on Occultations (Eclipses) and the July 19, 2011 occultation by Antiope David Dunham
North American Annular Eclipse, May 20, 2012 Richard Nugent
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Miscellaneous Files Associated with Observations
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European Observations of 20 May 2017 Centaur object occultation |
IOTA's Eclipse Edge Determination Experiment
Presentation to Riverside Telescope Makers Conference David Dunham |
Moberly Path (Solar Eclipse) |
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(Powerpoint presentation by D. Dunham) |
Erigone occults Regulus - 20 March 2014 |
Roger Venable Edit of David Dunham Venus Occultation (4.4 Mb) Alternate Video (mpg2) (1.2 Mb) |
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IOTA Handout - mid-August 2017 Asteroidal Occultations provided by David Dunham |
CYGNSS satellites (P. Maley) | |
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2015 April 2 4:54 UT |
| D. Dunham's Mid-Atlantic Occultation Summary | |
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Quadea, the Incredible Shrinking Asteroid presentation to APL Astronomy Club by David Dunham |
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IOTA Plans for the 2017 Total Solar Eclipse (PPT) David Dunham |
North American weather satellite image
Western North America weather satellite image
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