Data Set Overview : This dataset contains the asteroid dynamical family classifications contained in Zappala, et al. (1995) [ZAPPALAETAL1995]. These are based on the heirarchical clustering method applied to the proper elements of Milani and Knezevic (1994) [MILANI&KNEZEVIC1994]. 12,487 asteroids, 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) [MILANI&KNEZEVIC1994]. 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) [ZAPPALAETAL1995].  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 : This data set was first archived in 1994, including the family classifications of Zappala et al. (1990) [ZAPPALAETAL1990B] 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) [ZAPPALAETAL1995]. A more complete set of historical classifications have been added for the 1998 update.

Review : This data set underwent peer review on March 23, 1998.