PDS_VERSION_ID = PDS3 RECORD_TYPE = "FIXED_LENGTH" RECORD_BYTES = 126 FILE_RECORDS = 67 ^TABLE = "density.tab" DATA_SET_ID = "EAR-A-5-DDR-ASTEROID-DENSITIES-V1.1" PRODUCT_NAME = "ASTEROID DENSITIES COMPILATION" PRODUCT_ID = "DENSITY_TAB" INSTRUMENT_HOST_ID = "PUBLIT" INSTRUMENT_HOST_NAME = "PUBLISHED LITERATURE" INSTRUMENT_ID = "COMPIL" INSTRUMENT_NAME = "COMPILATION" TARGET_NAME = "ASTEROID" TARGET_TYPE = "ASTEROID" START_TIME = 1966-01-01 STOP_TIME = 2001-12-31 PRODUCT_CREATION_TIME = 2005-01-11 /* File uploaded to OLAF */ REFERENCE_KEY_ID = "BRITTETAL2002" RECORD_FORMAT = "(I6, 1X, A17, 1X, A10, 1X, A1, 2X, I1, 1X, E9.3, 1X, I1, 1X, E8.2, 1X, I1, 1X, E8.2, 1X, I1, 1X, E8.2, 1X, E8.2, 1X, F6.2, 1X, F5.2, 1X, F4.2, 1X, F4.2, 1X, F4.2, 1X, I3)" OBJECT = TABLE ROWS = 67 ROW_BYTES = 126 INTERCHANGE_FORMAT = "ASCII" COLUMNS = 19 DESCRIPTION = "A compilation of asteroid mass, diameter, and density results compiled by D. T. Britt. This table reproduces Table 1 of Britt, et al. (2002) [BRITTETAL2002] (appearing in the 'Asteroids III' volume). For each asteroid included in this file, the current best estimates of mass and volume are listed in the first record (or the first two if mass and volume came from separate references), and any following entries for the same asteroid give previous mass and volume determinations for completeness. The best estimates are also collected separately in the file 'densbest.tab' in this data set. " OBJECT = COLUMN COLUMN_NUMBER = 1 NAME = "AST_NUMBER" DESCRIPTION = "Asteroid catalog number, if any" DATA_TYPE = "ASCII_INTEGER" START_BYTE = 1 BYTES = 6 FORMAT = "I6" MISSING_CONSTANT = -99999 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 2 NAME = "AST_NAME" DESCRIPTION = "Asteroid name, if any" DATA_TYPE = "CHARACTER" START_BYTE = 8 BYTES = 17 FORMAT = "A17" MISSING_CONSTANT = "---" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 3 NAME = "PROV_ID" DESCRIPTION = "Asteroid provisional designation, provided for asteroids unnumbered as of the time of compilation" DATA_TYPE = "CHARACTER" START_BYTE = 26 BYTES = 10 FORMAT = "A10" MISSING_CONSTANT = "---" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 4 NAME = "TAX_TYPE" DESCRIPTION = "Tholen taxonomic type for the asteroid, included here for convenience only." DATA_TYPE = "CHARACTER" START_BYTE = 37 BYTES = 1 FORMAT = "A1" MISSING_CONSTANT = "-" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 5 NAME = "M_SOL_SOURCE" DESCRIPTION = "Flag for the source of M_SOL, the mass of the asteroid in solar masses. This flag takes the following values: 0 - Mass in solar masses provided in Britt (2002) (Asteroids III) 1 - Mass in solar masses calculated from the mass in kilograms (following) using the conversion factor 1.989E+30 kg per solar mass 2 - Mass in solar masses not available" DATA_TYPE = "ASCII_INTEGER" START_BYTE = 40 BYTES = 1 FORMAT = "I1" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 6 NAME = "M_SOL" DESCRIPTION = "Mass of asteroid in units of solar mass" UNIT = "SOLAR MASS" DATA_TYPE = "ASCII_REAL" START_BYTE = 42 BYTES = 9 FORMAT = "E9.3" MISSING_CONSTANT = -.999E+99 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 7 NAME = "M_SOL_UNC_SOURCE" DESCRIPTION = "Flag for the source of M_SOL_UNCERTAINTY, the uncertainty in the mass of the asteroid in solar masses. This flag takes the following values: 0 - Mass uncertainty in solar masses provided in Britt (2002) (Asteroids III) 1 - Mass uncertainty in solar masses calculated from the mass uncertainty in kilograms, using the conversion factor 1.989E+30 kg per solar mass 2 - Mass uncertainty in solar masses not available" DATA_TYPE = "ASCII_INTEGER" START_BYTE = 52 BYTES = 1 FORMAT = "I1" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 8 NAME = "M_SOL_UNCERTAINTY" DESCRIPTION = "One sigma uncertainty in asteroid mass in units of solar masses" UNIT = "SOLAR MASS" DATA_TYPE = "ASCII_REAL" START_BYTE = 54 BYTES = 8 FORMAT = "E8.2" MISSING_CONSTANT = -.99E+99 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 9 NAME = "M_KG_SOURCE" DESCRIPTION = "Flag for the source of M_KG, the mass of the asteroid in kilograms. This flag takes the following values: 0 - Mass in kilograms provided in Britt (2002) (Asteroids III) 1 - Mass in kilograms calculated from the mass in solar masses, using the conversion factor 1.989E+30 kg per solar mass 2 - Mass in kilograms not available." DATA_TYPE = "ASCII_INTEGER" START_BYTE = 63 BYTES = 1 FORMAT = "I1" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 10 NAME = "M_KG" DESCRIPTION = "Mass of asteroid in units of kilograms" UNIT = "KILOGRAM" DATA_TYPE = "ASCII_REAL" START_BYTE = 65 BYTES = 8 FORMAT = "E8.2" MISSING_CONSTANT = -.99E+99 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 11 NAME = "M_KG_UNC_SOURCE" DESCRIPTION = "Flag for the source of the uncertainty of M_KG, the uncertainty in the mass of the asteroid in kilograms. This flag takes the following values: 0 - Mass uncertainty in kilograms provided in Britt (2002) (Asteroids III) 1 - Mass uncertainty in kilograms calculated from the mass uncertainty in solar masses, using the conversion factor 1.989E+30 kg per solar mass 2 - Mass uncertainty in kilograms not available This flag applies to both the upper and lower uncertainty of M_KG." DATA_TYPE = "ASCII_INTEGER" START_BYTE = 74 BYTES = 1 FORMAT = "I1" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 12 NAME = "M_KG_UPPER_UNC" DESCRIPTION = "Upper one sigma uncertainty in the asteroid mass in units of kilograms" UNIT = "KILOGRAM" DATA_TYPE = "ASCII_REAL" START_BYTE = 76 BYTES = 8 FORMAT = "E8.2" MISSING_CONSTANT = -.99E+99 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 13 NAME = "M_KG_LOWER_UNC" DESCRIPTION = "Lower one sigma uncertainty in the asteroid mass in units of kilograms. If the uncertainty is symmetrical this value will duplicate the upper uncertainty." UNIT = "KILOGRAM" DATA_TYPE = "ASCII_REAL" START_BYTE = 85 BYTES = 8 FORMAT = "E8.2" MISSING_CONSTANT = -.99E+99 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 14 NAME = "DIAMETER" DESCRIPTION = "Diameter of asteroid in units of km" UNIT = "KILOMETER" DATA_TYPE = "ASCII_REAL" START_BYTE = 94 BYTES = 6 FORMAT = "F6.2" MISSING_CONSTANT = -99.99 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 15 NAME = "DIAMETER_UNC" DESCRIPTION = "One sigma uncertainty in asteroid diameter" UNIT = "KILOMETER" DATA_TYPE = "ASCII_REAL" START_BYTE = 101 BYTES = 5 FORMAT = "F5.2" MISSING_CONSTANT = -9.99 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 16 NAME = "BULK_DENSITY" DESCRIPTION = "Best current estimate of asteroid bulk density" UNIT = "GRAMS PER CUBIC CENTIMETER" DATA_TYPE = "ASCII_REAL" START_BYTE = 107 BYTES = 4 FORMAT = "F4.2" MISSING_CONSTANT = -.99 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 17 NAME = "BD_UPPER_UNC" DESCRIPTION = "One sigma upper uncertainty in asteroid bulk density" UNIT = "GRAMS PER CUBIC CENTIMETER" DATA_TYPE = "ASCII_REAL" START_BYTE = 112 BYTES = 4 FORMAT = "F4.2" MISSING_CONSTANT = -.99 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 18 NAME = "BD_LOWER_UNC" DESCRIPTION = "One sigma lower uncertainty in asteroid bulk density" UNIT = "GRAMS PER CUBIC CENTIMETER" DATA_TYPE = "ASCII_REAL" START_BYTE = 117 BYTES = 4 FORMAT = "F4.2" MISSING_CONSTANT = -.99 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 19 NAME = "REFERENCE" DESCRIPTION = "The reference code indicates numbered references listed in the accompanying file 'densrefs.tab' to the published papers reporting the values of asteroid mass, diameter, and density tabulated here." DATA_TYPE = "ASCII_INTEGER" START_BYTE = 122 BYTES = 3 FORMAT = "I3" END_OBJECT = COLUMN END_OBJECT = TABLE END