Data Set Overview
  =================
    The Asteroid Polarimetric Database (APD) is compiled by Dmitrij
    Lupishko of Kharkov University.  This database tabulates the
    original data comprising degree of polarization as a function of
    phase angle of the asteroid, and additional parameters where
    available.  This data set, together with 'polar.tab' containing the
    TRIAD polarimetry, includes most if not all existing asteroid
    polarimetry data published by 1998.  The APD is an ongoing
    compilation and this data set will be updated yearly.
 
 
  Modification History
  ====================
    This data set was first reviewed and ingested in 1996, and was
    updated in 1997 with additional polarimetric data published since
    then, as well as an added table of derived polarimetric parameters
    including polarization curves and polarimetric albedos of selected
    asteroids.  In 1999 the data set was updated again with additional
    polarimetric observations published since the previous version.
 
 
  Parameters
  ==========
    The parameters tabulated in 'apd.tab' are filter, phase angle,
    degree of polarization, polarization position angle, position angle
    of the scattering plane, and both degree of polarization and
    position angle in the proper coordinate system measured from the
    perpendicular to the scattering plane.
 
 
  Data
  ====
    The Asteroid Polarimetric Database is included in the file
    'apd.tab'.
 
 
  Ancillary Data
  ==============
    Parameters of the polarimetric curve for individual asteroids, as
    well as polarimetric albedos, are compiled in the file
    'apdcurv.tab'.  This file reproduces the data in Table 2 of Lupishko
    and Mohamed (1996) [LUPISHKO&MOHAMED1996].
 
    The entries in 'apd.tab' include a reference to the published paper
    in which the data appeared.  The full references of these papers, as
    well as many other asteroid polarimetry papers compiled by Lupishko,
    are given in the file 'apdref.tab'.

Confidence Level Overview
  =========================
    This is a compilation of asteroid polarimetry results from the
    published literature.  The user is referred to the individual
    publications for information on the confidence level of any given
    observation.
 
    The table of polarimetric parameters and polarimetric albedos,
    'apdcurv.tab', provides no error values, but instead gives a quality
    code as an assessment of the quality of the data.
 
 
  Review
  ======
    This data set underwent external peer review on April 9, 1999.