PDS_VERSION_ID      = PDS3                                                    
LABEL_REVISION_NOTE = "                                                       
  11 Dec 1998, a.c.raugh: Begin label revision history                        
  27 Sep 2000, A.C.Raugh: New version number for corrections in the           
                          'hisfam.tab' file: some objects mis-identified;     
                          two duplicate records deleted. Tightened up spacing 
                          in 'family.tab' file; added REFERENCE objects for   
                          the references listed in the DESCRIPTION of the     
                          'hisfam.lbl' file.                                  
  "                                                                           
                                                                              
OBJECT     = DATA_SET                                                         
  DATA_SET_ID       = "EAR-A-5-DDR-FAMILY-V4.1"                               
  DATA_SET_LOCAL_ID = "FAMILY"                                                
                                                                              
  OBJECT     = DATA_SET_INFORMATION                                           
    DATA_SET_NAME                  = "Asteroid Dynamical Families V4.1"       
    DATA_SET_TERSE_DESC            =                                          
      "Dynamical family classification of asteroids by Zappala, et al,.,      
       based on the hierarchical clustering method"                           
    ARCHIVE_STATUS                 = "LOCALLY_ARCHIVED"                       
    DATA_SET_COLLECTION_MEMBER_FLG = "N"                                      
    DATA_OBJECT_TYPE               = "TABLE"                                  
    START_TIME                     = "N/A"                                    
    STOP_TIME                      = "N/A"                                    
    DATA_SET_RELEASE_DATE          = 2000-03  /* Peer Review Date */          
    PRODUCER_FULL_NAME             = "Carol Neese"                            
    OBSERVER_FULL_NAME             = "V. Zappala"                             
    DATA_SET_UPDATE_PERIOD         = 2.0                                      
    DETAILED_CATALOG_FLAG          = "N"                                      
    DATA_SET_DESC                  = "                                        
                                                                              
      Data Set Overview                                                       
      =================                                                       
                                                                              
      This dataset contains the asteroid dynamical family classifications     
      contained in Zappala, et al. (1995) [ZAPPALAETAL1995].  These are       
      based on the hierarchical clustering method applied to the proper       
      elements of Milani and Knezevic (1994) [MILANI&KNEZEVIC1994].           
      12,487 asteroid, numbered and unnumbered, are included.                 
                                                                              
      The dataset also includes a compilation of the historical asteroid      
      families.                                                               
                                                                              
      Parameters                                                              
      ==========                                                              
                                                                              
      For each asteroid included in the analysis, the following parameters    
      are provided:                                                           
                                                                              
      o The proper elements a', e', and sin(i') of version 6.8.5 of the       
        fully analytical theory of Milani and Knezevic, published in          
        Milani and Knezevic (1994). These are the proper elements used        
        as input to the hierarchical clustering analysis.                     
                                                                              
      o The name of the family to which the asteroid was assigned; this       
        is blank for asteroids not assigned to a family.  The family name     
        is identical to the name of the lowest-numbered asteroid in the       
        family.                                                               
                                                                              
      o A flag indicating whether the asteroid belongs to a nominal           
        family (F) or a clump (C).  These terms are defined in                
        Zappala, et al. (1995).                                               
                                                                              
      o A quality code indicating the reliability of the family assignment    
                                                                              
                                                                              
      Data                                                                    
      ====                                                                    
                                                                              
      The complete Zappala family classifications are found in the file       
      'family.tab'.  The historical classifications are in the file           
      'hisfam.tab'.                                                           
                                                                              
      Modification History                                                    
      ====================                                                    
                                                                              
      In September 2000 it was discovered that, due to the peculiarities of   
      the naming conventions in Kozai (1979) [KOZAI1979], some asteroids      
      were mis-identified. These identifications have been checked and        
      corrected as needed. Two records discovered to be duplicates were       
      removed at this time.                                                   
                                                                              
      This data set was first archived in 1994, including the family          
      classifications of Zappala et al. (1990) as well as several historical  
      classifications.  The data set was updated in 1997, using the most      
      recent and extensive classifications of Zappala et al. (1995).  A more  
      complete set of historical classifications have been added for the 1998 
      update.                                                                 
                                                                              
      "                                                                       
    CONFIDENCE_LEVEL_NOTE          = "                                        
                                                                              
      Review                                                                  
      ======                                                                  
                                                                              
      This data set underwent peer review on March 23, 1998.                  
                                                                              
      "                                                                       
  END_OBJECT = DATA_SET_INFORMATION                                           
                                                                              
  OBJECT     = DATA_SET_TARGET                                                
    TARGET_NAME = "ASTEROID"                                                  
  END_OBJECT = DATA_SET_TARGET                                                
                                                                              
  OBJECT     = DATA_SET_HOST                                                  
    INSTRUMENT_HOST_ID = {"PUBLIT","PEDB"}                                    
    INSTRUMENT_ID      = {"COMPIL","DERIV"}                                   
  END_OBJECT = DATA_SET_HOST                                                  
                                                                              
  OBJECT     = DATA_SET_REFERENCE_INFORMATION                                 
    REFERENCE_KEY_ID = { "ZAPPALAETAL1995",                                   
                         "MILANI&KNEZEVIC1994",                               
                         "ARNOLD1969",                                        
                         "BROUWER1951",                                       
                         "CARUSI&MASSARO1978",                                
                         "HIRAYAMA1918",                                      
                         "KOZAI1979",                                         
                         "LINDBLAD&SOUTHW1971",                               
                         "WILLIAMS1979",                                      
                         "WILLIAMS1989",                                      
                         "WILLIAMS1992",                                      
                         "VANHOUTENETAL1970" }                                
  END_OBJECT = DATA_SET_REFERENCE_INFORMATION                                 
                                                                              
END_OBJECT = DATA_SET                                                         
                                                                              
END