Data Set Information
DATA_SET_NAME ASTEROID MASSES V3.0
DATA_SET_ID EAR-A-COMPIL-5-ASTMASS-V3.0
NSSDC_DATA_SET_ID NULL
DATA_SET_TERSE_DESCRIPTION Asteroid masses and densities compiled from the published literature as of April 18, 2012.
DATA_SET_DESCRIPTION 
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, to show the source of the tabulated bulk density.
    The version included in this data set is dated April 18, 2012.  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, astmass12.tab, the file
    astmassrefs12.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    unpublished values included in the original file have been removed.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 selecting size information for computing the bulk density, preference
    was given to the source with the most plausible greatest precision.  In
    general, this yielded the following order of preference:
    - direct imagery (including adaptive optics)
    - radar
    - occultation
    - light curves
    - radiometric (especially SIMPS).
 
    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]
 
    Modification History
    ====================
 
    This data set was first archived in 2009 and has been updated since by
    adding additional asteroid masses that have been published since the
    previous update.  The number of asteroid masses given in each version are
 
    V1.0 - 151
    V2.0 - 222
    V3.0 - 248
DATA_SET_RELEASE_DATE 2012-05-30T00:00:00.000Z
START_TIME 1991-01-01T12:00:00.000Z
STOP_TIME 2012-04-18T12:00:00.000Z
MISSION_NAME SUPPORT ARCHIVES
MISSION_START_DATE 2004-03-22T12:00:00.000Z
MISSION_STOP_DATE N/A (ongoing)
TARGET_NAME ASTEROID
TARGET_TYPE ASTEROID
INSTRUMENT_HOST_ID PUBLIT
INSTRUMENT_NAME COMPILATION
INSTRUMENT_ID COMPIL
INSTRUMENT_TYPE UNKNOWN
NODE_NAME Small Bodies
ARCHIVE_STATUS LOCALLY_ARCHIVED
CONFIDENCE_LEVEL_NOTE 
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.
CITATION_DESCRIPTION Baer, J., Chesley, S., and Britt, D., Eds., Asteroid Masses V3.0. EAR-A-COMPIL-5-ASTMASS-V3.0. NASA Planetary Data System, 2012.
ABSTRACT_TEXT This collection of asteroid masses and densities was compiled from the published literature by Jim Baer, Steve Chesley, and Dan Britt. Size and shape information are included as well to show the source of the tabulated bulk density. This is the version of the compilation as of April 18, 2012.
PRODUCER_FULL_NAME CAROL NEESE
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