PDS_VERSION_ID = PDS3 RECORD_TYPE = "FIXED_LENGTH" RECORD_BYTES = 127 FILE_RECORDS = 810 DATA_SET_ID = "EAR-C-PHOT-3-RDR-LOWELL-COMET-DB-V1.0" PRODUCT_ID = "LOCD-LOCDPROD-199801" PRODUCT_NAME = "LOCD: Production Rates" PRODUCT_CREATION_TIME = 1998-01-08T21:14:03Z TARGET_NAME = "COMET" START_TIME = 1976-08-12T06:24:28.800 STOP_TIME = 1991-10-11T11:15:21.600 INSTRUMENT_HOST_NAME = "LOWELL OBSERVATORY" INSTRUMENT_NAME = "PHOTOMETER" OBSERVER_FULL_NAME = "AHEARN,M/ET AL." ^TABLE = "locdprod.tab" OBJECT = TABLE ROWS = 810 ROW_BYTES = 127 COLUMNS = 19 INTERCHANGE_FORMAT = "ASCII" OBJECT = COLUMN COLUMN_NUMBER = 1 NAME = "PERIODIC_NUMBER" START_BYTE = 1 BYTES = 3 FORMAT = "I3" DATA_TYPE = "ASCII_INTEGER" DESCRIPTION = "Periodic comet number, or blank if this is either a not a short-period comet or has not yet been numbered" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 2 NAME = "COMET_TYPE" START_BYTE = 4 BYTES = 1 FORMAT = "A1" DATA_TYPE = "CHARACTER" DESCRIPTION = "A one-character code indicating the type of comet: C non-periodic comet D defunct comet P periodic comet This field is separated from the COMET_NAME by a slash (/)." END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 3 NAME = "COMET_NAME" START_BYTE = 6 FORMAT = "A25" DATA_TYPE = "CHARACTER" BYTES = 25 DESCRIPTION = "Full name of the comet" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 4 NAME = "IAU_DESIGNATION" START_BYTE = 32 BYTES = 7 DATA_TYPE = "CHARACTER" FORMAT = "A7" DESCRIPTION = "Official IAU discovery designation of the object" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 5 NAME = "OLD_IAU_PROV_ID" START_BYTE = 41 FORMAT = "A6" DATA_TYPE = "CHARACTER" BYTES = 6 DESCRIPTION = "IAU provisional comet designation in the old system, if known" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 6 NAME = "OBSERVATION_YEAR" START_BYTE = 48 FORMAT = "I4" DATA_TYPE = "ASCII_INTEGER" BYTES = 4 DESCRIPTION = "Four-digit year of observation" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 7 NAME = "OBSERVATION_MONTH" START_BYTE = 53 FORMAT = "I2" DATA_TYPE = "ASCII_INTEGER" BYTES = 2 DESCRIPTION = "2-digit month of observation" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 8 NAME = "OBSERVATION_DAY" START_BYTE = 56 FORMAT = "F6.3" DATA_TYPE = "ASCII_REAL" BYTES = 6 DESCRIPTION = "Day-in-month of observation, with decimal fraction of a day" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 9 NAME = "R_HELIO" START_BYTE = 63 FORMAT = "F5.3" UNIT = "AU" DATA_TYPE = "ASCII_REAL" BYTES = 5 DESCRIPTION = "Heliocentric distance of the comet during the observation in Astronomical Units (AU)" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 10 NAME = "DELTA" START_BYTE = 69 FORMAT = "F4.2" UNIT = "AU" DATA_TYPE = "ASCII_REAL" BYTES = 4 DESCRIPTION = "Geocentric distance of the comet during the observation in Astronomical Units (AU)" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 11 NAME = "VR_HELIO" START_BYTE = 74 FORMAT = "F5.1" UNIT = "KM/S" INVALID_CONSTANT = 99.99 DATA_TYPE = "ASCII_REAL" BYTES = 5 DESCRIPTION = "Comet heliocentric radial velocity during the observation in kilometers/second" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 12 NAME = "LOG RHO" START_BYTE = 80 FORMAT = "F4.2" UNIT = "KM" INVALID_CONSTANT = 99.99 DATA_TYPE = "ASCII_REAL" BYTES = 4 DESCRIPTION = "Rho is the projected radius of the aperture at the comet, in kilometers. The log of this distance is listed." END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 13 NAME = "LOG_Q_OH" START_BYTE = 85 FORMAT = "F5.2" UNIT = "MOLECULES/SECOND" INVALID_CONSTANT = 99.99 DATA_TYPE = "ASCII_REAL" BYTES = 5 DESCRIPTION = "Q(OH) is the production rate of OH in molecules/s. The log of this quantity is given." END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 14 NAME = "LOG_Q_NH" START_BYTE = 91 FORMAT = "F5.2" UNIT = "MOLECULES/SECOND" INVALID_CONSTANT = 99.99 DATA_TYPE = "ASCII_REAL" BYTES = 5 DESCRIPTION = "Q(NH) is the production rate of NH in molecules/s. The log of this quantity is given." END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 15 NAME = "LOG_Q_CN" START_BYTE = 97 FORMAT = "F5.2" UNIT = "MOLECULES/SECOND" INVALID_CONSTANT = 99.99 DATA_TYPE = "ASCII_REAL" BYTES = 5 DESCRIPTION = "Q(CN) is the production rate of CN in molecules/s. The log of this quantity is given." END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 16 NAME = "LOG_Q_C3" START_BYTE = 103 FORMAT = "F5.2" UNIT = "MOLECULES/SECOND" INVALID_CONSTANT = 99.99 DATA_TYPE = "ASCII_REAL" BYTES = 5 DESCRIPTION = "Q(C3) is the production rate of C3 in molecules/s. The log of this quantity is given." END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 17 NAME = "LOG_Q_C2" START_BYTE = 109 FORMAT = "F5.2" UNIT = "MOLECULES/SECOND" INVALID_CONSTANT = 99.99 DATA_TYPE = "ASCII_REAL" BYTES = 5 DESCRIPTION = "Q(C2) is the production rate of C2 in molecules/s. The log of this quantity is given." END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 18 NAME = "LOG_AFRHO_UV_CONT" START_BYTE = 115 FORMAT = "F5.2" UNIT = "CM" INVALID_CONSTANT = 99.99 DATA_TYPE = "ASCII_REAL" BYTES = 5 DESCRIPTION = "A*f*rho is the product of albedo, filling factor of grains within our field of view, and the linear radius of the field of view at the comet. It is a proxy for dust production and is an aperture-independent quantity for a comet with a canonical spatial distribution of dust. The log of this quantity is given." END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 19 NAME = "LOG_AFRHO_B_CONT" START_BYTE = 121 FORMAT = "F5.2" UNIT = "CM" INVALID_CONSTANT = 99.99 DATA_TYPE = "ASCII_REAL" BYTES = 5 DESCRIPTION = "A*f*rho is the product of albedo, filling factor of grains within our field of view, and the linear radius of the field of view at the comet. It is a proxy for dust production and is an aperture-independent quantity for a comet with a canonical spatial distribution of dust. The log of this quantity is given." END_OBJECT = COLUMN END_OBJECT = TABLE END