Data Set Overview
  =================
    This collection of asteroid masses and densities has been compiled from
    the published literature by Jim Baer, Steve Chesley, and Dan Britt.  It
    also includes asteroid size and shape information, also collected from the
    published literature. The version included in this data set is dated Dec.
    15, 2010.  This data set supersedes the older PDS Asteroid Densities data
    set, EAR-A-5-DDR-ASTEROID-DENSITIES-V1.1.
 
    In addition to the asteroid mass and density file, astmass11.tab, the file
    astmassrefs11.tab lists the full references of the published sources of
    the mass and size data.  Only published values are included; a few
    unpublished values included in the original file have been removed.
 
    In addition to asteroids, entries for the Pluto/Charon/Nix/Hydra system
    are included.  For comet masses, see the data set Properties of Comet
    Nuclei, EAR-C-COMPIL-5-COMET-NUC-PROPERTIES-V1.0.
 
    Since the cited publication Standish (2001) is of limited availability, it
    has been provided in the document directory of this data set with
    permission from the author.
 
    Standish, E. M., Suggested GM values for Ceres, Pallas, and Vesta, JPL
    Interoffice Memorandum 312.F-01-006, April 11, 2001. [Standish2001]

Confidence Level Overview
  =========================
    These data have been compiled from various published sources.  See the
    original papers for information about the confidence level of the values
    reported.  A more frequently updated version of the compilation  is
    available on-line at http://home.earthlink.net/~jimbaer1/astmass.htm.