Data Set Overview
  =================
  This is a compilation of published rotational parameters for lightcurve data
  on asteroids, through Feb. 15, 2008.  These data files are provided by Alan
  Harris and Brian D. Warner, Space Science Institute, and Petr Pravec,
  Astronomical Institute, Czech Republic.
 
  The compilation is originally based on that published in
  [LAGERKVISTETAL1989]:
 
  Lagerkvist, C.-I., A.W. Harris, and V. Zappala 1988.  Asteroid lightcurve
  parameters.  In 'Asteroids II', Binzel, R.P., T.  Gehrels, and M.S.
  Matthews, Eds.  (University of Arizona Press:  Tucson) p. 1162, 1989.
 
  Note that some asteroids are included which do not have an assigned
  provisional designation.  For this version of the data set, such asteroids
  are all from a survey carried out at the Subaru telescope by Budi Dermawan
  of the University of Tokyo, but it is expected that future updates of the
  data set may contain asteroids from other surveys which do not yet have
  provisional designations.  For such asteroids an alternate survey-assigned
  designation is given.
 
  Parameters
  ==========
 
  The data files included are listed here with a description of their
  contents.
 
  lcsummary.tab -
  The summary file includes one entry for each asteroid for which lightcurve
  observations have been made.  Each entry gives the following parameters:
  rotation period; minimum and maximum amplitude of lightcurve; reliability
  code; and a flag for binarity.  These paramters are selected as the best
  values known from the published literature.
 
  lcdetails.tab -
  The details file includes one entry for each publication of asteroid
  lightcurve results, with the same parameters as in the summary file but
  extracted from the individual publications.  There is a reference code
  referring to the publications list (lc_references.tab).
 
  lc_binary.tab -
  A list of asteroids known or suspected to be binary, along with the reported
  primary and secondary periods and amplitudes.  Primary and secondary periods
  correspond with the rotation period of the primary and the orbital period of
  the binary.  Note that not all binaries listed are based on lightcurve
  studies, the list also includes adaptive optics and radar studies.
 
  lc_npa.tab -
  A list of asteroids for which non-principal-axis (NPA) data have been
  reported, along with the reported primary and secondary periods and
  amplitudes.
 
  lc_references.tab -
  This file includes the complete citation for each reference cited in the
  data files.
 
  Documentation
  ==========
 
  The file readme.txt, included in the document directory, contains a
  description of the data files and how they were compiled.
 
 
  Modification History
  ====================
  The lc data set was first introduced into PDS at the April 1994 asteroid
  datasets review.  It was subsequently updated at the March 1996 review, the
  April 1999 review, the May 2002 review, the May 2004 review, and the June
  2005 review.  Updates consist of adding information published or released
  since the last update.
 
  At the May 2002 review of version 5.0, it was decided to separate the
  reference number listings, which were becoming long, from the main data
  table. The lccross.tab file was created to provide the cross-listing
  information between objects and references. The reference list in the main
  data file was replaced with a single number indicating the total number of
  references for each object.
 
  For the May 2007 review, the compilers of this data set (Harris, Warner, and
  Pravec) had loaded the data into a database and were able to provide the
  data files in a slightly updated and more uniform format.  The lcscross.tab
  crosslisting file is no longer needed, since each line in lcdetails.tab is
  tied to its appropriate reference through the lc_references.tab file.  The
  entries in the other data files, with the exception of lcdetails.tab, also
  each cite a specific reference in lc_references.tab.
 
  The data set was subsequently updated in 2008 with the addition of data
  published through February 2008.  In the 2008 version the spin axis
  compilation was removed from the data set because it is a subset of the spin
  axis compilation of Kryszczynska which is included in a separate data set.

Confidence Level Overview
  =========================
  The confidence level of each entry in the data set is indicated by a quality
  code.  This quality code is described in the associated data label,
  'LCSUMMARY.TAB'.  Fpr further information the user is referred to the cited
  original publications.