Data Set Overview
  =================
 
    This data set is intended to include all reported timings of
    observed asteroid occultation events through Feb. 23, 2005, as well as
    asteroid axes derived from those timings by David W. Dunham
    and David Herald.  Most of these timings are unpublished and have
    been collected by Dunham and Herald.
 
  Data
  ====
 
    The asteroid occultation timing data are collected into two files.  The
    occlist file lists a total of 680 occultations, one
    occultation per line, along with the identification of the asteroid
    and star, and additional information about the star including RA
    and dec.  These lines also include the major and minor axes derived
    from the timings for that occultation, if any, along with information
    about the analysis.  The list is chronological, with an occultation ID
    assigned to each one.  The occtimings file lists the individual
    timings measured for each occultation, with one disappearance and
    reappearance per line, as well as information about the observing site
    and the observational circumstances.  The latitude, longitude, and
    elevation of each site are included.
 
    Two analogous files, occsatlist and occsattime, with occultation data
    on planetary satellites, are also included.
 
  Ancillary Data
  ==============
 
    Because of its convenience, a file containing derived occultation
    diameters collected by David Dunham and published in Asteroids II
    pp. 148-170 [MILLIS&DUNHAM1989] and in Dunham et al. 2002 (Memorie
    della Societa Astronomica Italiana, 73, 662-665) [DUNHAMETAL2002] is
    also included.  These diameters are superseded by the derived major and
    minor axes listed in the full occultations list, occlist.tab.
 
  Modification History
  ====================
 
    The first version of this data set, introduced in 2003, included
    occultations only through 1998.  The update of 2004 not only
    adds occultations through March 1, 2004, but also provides a more
    systematic arrangement of the data.  The data set was again updated
    in 2005 with the addition of more occultation events through [date].
    The asteroid sizes (major and minor axes) derived from the occultation
    timing data are the result of an analysis program by Dunham and Herald,
  applied consistently to all the occultation events.

Confidence Level Overview
  =========================
    This data set is compiled from the observations made by a large number
    of observers.  Indications to the confidence level of each observation
    are included in the data files.