PDS_VERSION_ID = PDS3 /* File Characteristics */ RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 284 FILE_RECORDS = 7309 /* Data Object Pointers */ ^TABLE = "GRNDDAT.TAB" /* Identification Keywords */ DATA_SET_ID = "IRAS-A-FPA-3-RDR-IMPS-V4.0" PRODUCT_NAME = "IMPS Ground Data File" PRODUCT_ID = "IMPS-GRNDDAT-199803" INSTRUMENT_HOST_NAME = "INFRARED ASTRONOMICAL SATELLITE" INSTRUMENT_NAME = "FOCAL PLANE ARRAY" TARGET_NAME = ASTEROID START_TIME = 1983-01 STOP_TIME = 1983-11 PRODUCT_CREATION_TIME = 1998-03-23 /* Peer Review Date */ RECORD_FORMAT = "(a5,1x,a18,1x,a9,1x,f6.4,1x,f6.2,1x,a3, 3(1x,f10.2,3(1x,f10.6),1x,f9.6,1x,f8.6,1x,f5.3,1x,f6.3))" /* Data Object Descriptions */ OBJECT = TABLE ROWS = 7309 ROW_BYTES = 284 INTERCHANGE_FORMAT = ASCII COLUMNS = 30 DESCRIPTION = "This dataset is a subset of the IRAS Minor Planet Survey Final Product 107, the IMPS Ground-Based Data Data Base. It contains entries for each of 4677 numbered asteroids and 2632 unnumbered asteroids (as of 1985) for which associations were sought in the IRAS data. Asteroids 719 Albert and 878 Mildred were still lost as of 1985 and are not included. These entries include an initial estimate of geometric albedo and diameter used in processing IRAS survey observations of asteroids, the adopted taxonomic classification, and the orbital elements at three epochs. The Julian dates of the epochs are 2445400.5, 2445500.5, and 2445600.5. For further information regarding these data see TEDESCOETAL1992." OBJECT = COLUMN COLUMN_NUMBER = 1 NAME = "ASTEROID ID" DESCRIPTION = "The IAU asteroid number designation. For unnumbered asteroids, this field is blank." DATA_TYPE = CHARACTER START_BYTE = 1 BYTES = 5 FORMAT = A5 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 2 NAME = "ASTEROID NAME" DESCRIPTION = "IAU asteroid name. For unnamed asteroids, this field is blank." DATA_TYPE = CHARACTER START_BYTE = 7 BYTES = 18 FORMAT = A18 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 3 NAME = "ASTEROID PROVISIONAL DESIGNATION" DESCRIPTION = "Asteroid principal provisional designation. For named asteroids, this field is blank." DATA_TYPE = CHARACTER START_BYTE = 26 BYTES = 9 FORMAT = A9 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 4 NAME = "GEOMETRIC ALBEDO ESTIMATE" DESCRIPTION = "The albedo utilized by the IRAS Asteroid Data Analysis Program, based on prior ground groundbased observations or known or presumed taxonomic class. A default value of 0.01 was assumed." DATA_TYPE = ASCII_REAL START_BYTE = 37 BYTES = 6 FORMAT = "F6.4" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 5 NAME = "DIAMETER ESTIMATE" DESCRIPTION = "The diameter based on the absolute visual magnitude and GEOMETRIC_ALBEDO_ESTIMATE of the asteroid." UNIT = KILOMETER DATA_TYPE = ASCII_REAL START_BYTE = 44 BYTES = 6 FORMAT = "F6.2" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 6 NAME = "IMPS TAXONOMY" DESCRIPTION = "The adopted spectral taxonomic classification using TEDESCOETAL1989." DATA_TYPE = CHARACTER START_BYTE = 51 BYTES = 3 FORMAT = A3 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 7 NAME = "PERIHELION PASSAGE TIME 1" DESCRIPTION = "Julian date at which the asteroid is at perihelion. The Julian date of epoch is 2445400.5." UNIT = "JULIAN DATE" DATA_TYPE = ASCII_REAL START_BYTE = 55 BYTES = 10 FORMAT = "F10.2" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 8 NAME = "MEAN ANOMALY 1" DESCRIPTION = "The orbital mean anomaly. The Julian date of epoch is 2445400.5." UNIT = DEGREE DATA_TYPE = ASCII_REAL START_BYTE = 66 BYTES = 10 FORMAT = "F10.6" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 9 NAME = "ARGUMENT OF PERIHELION 1" DESCRIPTION = "Argument of perihelion. The Julian date of epoch is 2445400.5." UNIT = DEGREE DATA_TYPE = ASCII_REAL START_BYTE = 77 BYTES = 10 FORMAT = "F10.6" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 10 NAME = "ASCENDING NODE 1" DESCRIPTION = "The longitude of the ascending node. The Julian date of epoch is 2445400.5." UNIT = DEGREE DATA_TYPE = ASCII_REAL START_BYTE = 88 BYTES = 10 FORMAT = "F10.6" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 11 NAME = "ORBITAL INCLINATION 1" DESCRIPTION = "Orbital inclination. The Julian date of epoch is 2445400.5." UNIT = DEGREE DATA_TYPE = ASCII_REAL START_BYTE = 99 BYTES = 9 FORMAT = "F9.6" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 12 NAME = "ORBITAL ECCENTRICITY 1" DESCRIPTION = "Orbital eccentricity. The Julian date of epoch is 2445400.5." DATA_TYPE = ASCII_REAL START_BYTE = 109 BYTES = 8 FORMAT = "F8.6" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 13 NAME = "PERIHELION DISTANCE 1" DESCRIPTION = "Closest distance of an object to the Sun. The Julian date of epoch is 2445400.5." UNIT = "ASTRONOMICAL UNIT" DATA_TYPE = ASCII_REAL START_BYTE = 118 BYTES = 5 FORMAT = "F5.3" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 14 NAME = "SEMIMAJOR AXIS 1" DESCRIPTION = "Semi-major axis. The Julian date of epoch is 2445400.5." UNIT = "ASTRONOMICAL UNIT" DATA_TYPE = ASCII_REAL START_BYTE = 124 BYTES = 6 FORMAT = "F10.3" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 15 NAME = "PERIHELION PASSAGE TIME 2" DESCRIPTION = "Julian date at which the asteroid is at perihelion. The Julian date of epoch is 2445500.5." UNIT = "JULIAN DATE" DATA_TYPE = ASCII_REAL START_BYTE = 131 BYTES = 10 FORMAT = "F10.2" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 16 NAME = "MEAN ANOMALY 2" DESCRIPTION = "The orbital mean anomaly. The Julian date of epoch is 2445500.5." UNIT = DEGREE DATA_TYPE = ASCII_REAL START_BYTE = 142 BYTES = 10 FORMAT = "F10.6" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 17 NAME = "ARGUMENT OF PERIHELION 2" DESCRIPTION = "Argument of perihelion. The Julian date of epoch is 2445500.5." UNIT = DEGREE DATA_TYPE = ASCII_REAL START_BYTE = 153 BYTES = 10 FORMAT = "F10.6" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 18 NAME = "ASCENDING NODE 2" DESCRIPTION = "The longitude of the ascending node. The Julian date of epoch is 2445500.5." UNIT = DEGREE DATA_TYPE = ASCII_REAL START_BYTE = 164 BYTES = 10 FORMAT = "F10.6" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 19 NAME = "ORBITAL INCLINATION 2" DESCRIPTION = "Orbital inclination. The Julian date of epoch is 2445500.5." UNIT = DEGREE DATA_TYPE = ASCII_REAL START_BYTE = 175 BYTES = 9 FORMAT = "F9.6" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 20 NAME = "ORBITAL ECCENTRICITY 2" DESCRIPTION = "Orbital eccentricity. The Julian date of epoch is 2445500.5." DATA_TYPE = ASCII_REAL START_BYTE = 185 BYTES = 8 FORMAT = "F8.6" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 21 NAME = "PERIHELION DISTANCE 2" DESCRIPTION = "Closest distance of an object to the Sun. The Julian date of epoch is 2445500.5." UNIT = "ASTRONOMICAL UNIT" DATA_TYPE = ASCII_REAL START_BYTE = 194 BYTES = 5 FORMAT = "F5.3" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 22 NAME = "SEMIMAJOR AXIS 2" DESCRIPTION = "Semi-major axis. The Julian date of epoch is 2445500.5." UNIT = "ASTRONOMICAL UNIT" DATA_TYPE = ASCII_REAL START_BYTE = 200 BYTES = 6 FORMAT = "F6.3" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 23 NAME = "PERIHELION PASSAGE TIME 3" DESCRIPTION = "Julian date at which the asteroid is at perihelion. The Julian date of epoch is 2445600.5." UNIT = "JULIAN DATE" DATA_TYPE = ASCII_REAL START_BYTE = 207 BYTES = 10 FORMAT = "F10.2" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 24 NAME = "MEAN ANOMALY 3" DESCRIPTION = "The orbital mean anomaly. The Julian date of epoch is 2445600.5." UNIT = DEGREE DATA_TYPE = ASCII_REAL START_BYTE = 218 BYTES = 10 FORMAT = "F10.6" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 25 NAME = "ARGUMENT OF PERIHELION 3" DESCRIPTION = "Argument of perihelion. The Julian date of epoch is 2445600.5." UNIT = DEGREE DATA_TYPE = ASCII_REAL START_BYTE = 229 BYTES = 10 FORMAT = "F10.6" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 26 NAME = "ASCENDING NODE 3" DESCRIPTION = "The longitude of the ascending node. The Julian date of epoch is 2445600.5." UNIT = DEGREE DATA_TYPE = ASCII_REAL START_BYTE = 240 BYTES = 10 FORMAT = "F10.6" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 27 NAME = "ORBITAL INCLINATION 3" DESCRIPTION = "Orbital inclination. The Julian date of epoch is 2445600.5." UNIT = DEGREE DATA_TYPE = ASCII_REAL START_BYTE = 251 BYTES = 9 FORMAT = "F9.6" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 28 NAME = "ORBITAL ECCENTRICITY 3" DESCRIPTION = "Orbital eccentricity. The Julian date of epoch is 2445600.5." DATA_TYPE = ASCII_REAL START_BYTE = 261 BYTES = 8 FORMAT = "F8.6" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 29 NAME = "PERIHELION DISTANCE 3" DESCRIPTION = "Closest distance of an object to the Sun. The Julian date of epoch is 2445600.5." UNIT = "ASTRONOMICAL UNIT" DATA_TYPE = ASCII_REAL START_BYTE = 270 BYTES = 5 FORMAT = "F5.3" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 30 NAME = "SEMIMAJOR AXIS 3" DESCRIPTION = "Semi-major axis. The Julian date of epoch is 2445600.5." UNIT = "ASTRONOMICAL UNIT" DATA_TYPE = ASCII_REAL START_BYTE = 276 BYTES = 6 FORMAT = "F6.3" END_OBJECT = COLUMN END_OBJECT = TABLE END