These give a reasonably complete list of graze expeditions undertaken from 
1974 to early 1986, as published in OCCULTATION NEWSLETTER (ON).  Don 
Stockbauer and Don Oliver in Houston, TX, prepared the original files, which 
are nearly in the same format as they are published in the summary lists in 
ON.  

     Star numbers are given mostly as 4-digit Zodiacal Catalog (Robertson) 
numbers.  For most non-Z.C. stars, 6-digit SAO numbers are given.  But for 
many of the early grazes, SZ catalog (USNO Z) numbers are given, a "Z" 
followed by 5 digits.  These need to be converted to SAO numbers.  For some 
stars neither in Z.C. nor in SAO, other catalogs are used, such as B.D., 
USNO E, and USNO K catalogs.  Grazes of planets (partial occultations) and 
some of the Sun (solar eclipse observed at the northern or southern limit of 
annularity or totality) are also included.

     Richard Wilds has all of the ON graze summary lists that he prepared, 
but not in one place.  They need to be consolidated like the list here, and 
Z.C. numbers given where appropriate.  Then the list can be brought 
virtually up-to-date.  For earlier grazes, Don Oliver was working on a 
project to use a database of observations of grazes observed up to 1976, as 
collected by HMNAO (Royal Greenwich Observatory) and processed by Tom Van 
Flandern at USNO (this includes all timings, but unfortunately not the 
accurate positions of the observers, or their names) to generate expedition 
information.  Don ran into technical problems and gave up the project.  
During a recent business trip to Japan, I gave these data to Mitsuru Soma 
and Toshio Hirose, and explained what we wanted to create a comprehensive 
list of graze expeditions from this information.  So with the help of these 
others, the project started by Stockbauer and Oliver can be finished to 
give a list of graze expeditions that is as complete as possible.  This will 
be valuable for searching by star number and latitude libration/Watts angle 
range to locate previous graze observations, and perform new analyses of 
them to improve the predictions for important future grazes. 

David Dunham, IOTA, 1996 June 17
Joan and David Dunham			(301) 474-4722
dunham@erols.com