PDS_VERSION_ID = PDS3 RECORD_TYPE = "FIXED_LENGTH" RECORD_BYTES = 420 FILE_RECORDS = 1055 ^TABLE = "occlist.tab" DATA_SET_ID = "EAR-A-3-RDR-OCCULTATIONS-V5.0" PRODUCT_NAME = "ASTEROID OCCULTATION LIST" PRODUCT_ID = "OCCLIST_TAB" INSTRUMENT_HOST_ID = "VARGBTEL" INSTRUMENT_HOST_NAME = "VARIOUS GROUND-BASED TELESCOPES" INSTRUMENT_ID = "VARGBDET" INSTRUMENT_NAME = "VARIOUS GROUND-BASED DETECTORS" TARGET_NAME = "ASTEROID" TARGET_TYPE = "ASTEROID" START_TIME = 1958-02-19 STOP_TIME = 2007-05-09 PRODUCT_CREATION_TIME = 2007-09-05 /* File uploaded to OLAF */ REFERENCE_KEY_ID = {"BOWELLETAL1989", "DUNHAMETAL2002", "ESA1997", "MILLIS&DUNHAM1989", "ZACHARIASETAL2000"} OBJECT = TABLE ROWS = 1055 ROW_BYTES = 420 INTERCHANGE_FORMAT = "ASCII" COLUMNS = 58 DESCRIPTION = "This file lists the asteroid occultations, along with derivations of major and minor axes where possible. The occultations are listed in chronological order from the first one in 1958 through May 2007. The occultations are each assigned an occultation number which is used in the timings files of the data set to refer back to the information in this file. The timings file lists the timings reported from all sites and for all occultations." OBJECT = COLUMN COLUMN_NUMBER = 1 NAME = "SEQ_NUM" DESCRIPTION = "A unique sequence number for the occultation event. This sequence number is used in the timings file as well, to identify which occultation a given observation pertains to." DATA_TYPE = "CHARACTER" START_BYTE = 1 BYTES = 4 FORMAT = "A4" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 2 NAME = "OBS_DATE" DESCRIPTION = "Date of observation" DATA_TYPE = "DATE" START_BYTE = 6 BYTES = 10 FORMAT = "A10" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 3 NAME = "AST_NUMBER" DESCRIPTION = "Asteroid catalog number" DATA_TYPE = "ASCII_INTEGER" START_BYTE = 17 BYTES = 6 FORMAT = "I6" MISSING_CONSTANT = 0 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 4 NAME = "AST_NAME" DESCRIPTION = "Name of the asteroid" DATA_TYPE = "CHARACTER" START_BYTE = 24 BYTES = 17 FORMAT = "A17" MISSING_CONSTANT = "-" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 5 NAME = "PROV_DESIG" DESCRIPTION = "Provisional designation of the asteroid" DATA_TYPE = "CHARACTER" START_BYTE = 42 BYTES = 10 FORMAT = "A10" MISSING_CONSTANT = "-" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 6 NAME = "CATALOG_STAR_DESIG" DESCRIPTION = "Modern catalog designation of the occulted star. HIP nnnnn = Hipparchos Catalog, from 'The Hipparcos and Tycho Catalogs, ESA SP-1200' [ESA1997], 2Unnnnnnnn = USNO Astrographic Catalog, Zacharias, N., S.E. Urban, M.I. Zacharias, D.M. Hall, G.L. Wycoff, T.J. Rafferty, M.E. Germain, E.R. Holdenried, J.W. Pohlman, F.S. Gauss, D.G. Monet, and L. Winter 2000. The first USNO CCD Astrograph Catalog. Astron. J. 120, 2131. [ZACHARIASETAL2000], pppp-nnnnn-x = Tycho-2 Catalog, from 'The Hipparcos and Tycho Catalogs, ESA SP-1200' [ESA1997]." DATA_TYPE = "CHARACTER" START_BYTE = 53 BYTES = 12 FORMAT = "A12" MISSING_CONSTANT = "-" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 7 NAME = "STAR_RA_HOURS" DESCRIPTION = "Hours of J2000 right ascension of the star" UNIT = "HOUR" DATA_TYPE = "ASCII_INTEGER" START_BYTE = 66 BYTES = 2 FORMAT = "I2" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 8 NAME = "STAR_RA_MINUTES" DESCRIPTION = "Minutes of J2000 right ascension of the star" UNIT = "MINUTE" DATA_TYPE = "ASCII_INTEGER" START_BYTE = 69 BYTES = 2 FORMAT = "I2" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 9 NAME = "STAR_RA_SECONDS" DESCRIPTION = "Seconds of J2000 right ascension of the star" UNIT = "SECOND" DATA_TYPE = "ASCII_REAL" START_BYTE = 72 BYTES = 7 FORMAT = "F7.4" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 10 NAME = "STAR_DEC_SIGN" DESCRIPTION = "Sign of J2000 declination of the star" DATA_TYPE = "CHARACTER" START_BYTE = 80 BYTES = 1 FORMAT = "A1" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 11 NAME = "STAR_DEC_DEGREES" DESCRIPTION = "Degrees of J2000 declination of the star" UNIT = "DEGREE" DATA_TYPE = "ASCII_INTEGER" START_BYTE = 82 BYTES = 2 FORMAT = "I2" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 12 NAME = "STAR_DEC_MINUTES" DESCRIPTION = "Minutes of J2000 declination of the star" UNIT = "ARCMINUTE" DATA_TYPE = "ASCII_INTEGER" START_BYTE = 85 BYTES = 2 FORMAT = "I2" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 13 NAME = "STAR_DEC_SECONDS" DESCRIPTION = "Seconds of J2000 declination of the star" UNIT = "ARCSECOND" DATA_TYPE = "ASCII_REAL" START_BYTE = 88 BYTES = 6 FORMAT = "F6.3" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 14 NAME = "TIME_ZERO" DESCRIPTION = "TIME_ZERO is the time on OBS_DATE for which the motions of the following four fields are computed." UNIT = "HOUR" DATA_TYPE = "ASCII_REAL" START_BYTE = 95 BYTES = 6 FORMAT = "F6.3" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 15 NAME = "AST_RA_MOTION" DESCRIPTION = "Motion of asteroid in right ascension" UNIT = "SECOND/HOUR" DATA_TYPE = "ASCII_REAL" START_BYTE = 102 BYTES = 8 FORMAT = "F8.5" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 16 NAME = "AST_RA_MOTION_2ND" DESCRIPTION = "Second order motion of asteroid in right ascension" UNIT = "SECOND/HOUR/HOUR" DATA_TYPE = "ASCII_REAL" START_BYTE = 111 BYTES = 8 FORMAT = "F8.5" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 17 NAME = "AST_DEC_MOTION" DESCRIPTION = "Motion of asteroid in declination" UNIT = "ARCSECOND/HOUR" DATA_TYPE = "ASCII_REAL" START_BYTE = 120 BYTES = 9 FORMAT = "F9.4" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 18 NAME = "AST_DEC_MOTION_2ND" DESCRIPTION = "Second order motion of asteroid in declination" UNIT = "ARCSECOND/HOUR/HOUR" DATA_TYPE = "ASCII_REAL" START_BYTE = 130 BYTES = 7 FORMAT = "F7.4" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 19 NAME = "AST_PARALLAX" DESCRIPTION = "Geocentric parallax of asteroid" UNIT = "ARCSECOND" DATA_TYPE = "ASCII_REAL" START_BYTE = 138 BYTES = 7 FORMAT = "F7.4" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 20 NAME = "UPDATE_DATE" DESCRIPTION = "Last date of update to any data item in the event record" DATA_TYPE = "DATE" START_BYTE = 146 BYTES = 10 FORMAT = "A10" MISSING_CONSTANT = "9999-99-99" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 21 NAME = "EDIT_DATE" DESCRIPTION = "Last date of edit of any observation record in the event record" DATA_TYPE = "DATE" START_BYTE = 157 BYTES = 10 FORMAT = "A10" MISSING_CONSTANT = "9999-99-99" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 22 NAME = "STAR_V_MAG" DESCRIPTION = "Apparent V magnitude of the star" UNIT = "MAGNITUDE" DATA_TYPE = "ASCII_REAL" START_BYTE = 168 BYTES = 5 FORMAT = "F5.2" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 23 NAME = "AST_V_MAG" DESCRIPTION = "Predicted apparent V magnitude of the asteroid" UNIT = "MAGNITUDE" DATA_TYPE = "ASCII_REAL" START_BYTE = 174 BYTES = 5 FORMAT = "F5.2" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 24 NAME = "AST_DIAM" DESCRIPTION = "Asteroid diameter, taken from the Supplemental IRAS Minor Planet Survey if possible, otherwise estimated from the asteroid's H(0) value using the expression AST_DIAM = 10^(3.1295 - 0.5*log(a) - 0.2*H(0)) and an assumed albedo of a=0.1652. Equation from Bowell et al. (1989) Asteroids II p. 551." UNIT = "KILOMETER" DATA_TYPE = "ASCII_INTEGER" START_BYTE = 180 BYTES = 4 FORMAT = "I4" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 25 NAME = "ELLIPSE_CENTER_X" DESCRIPTION = "X coordinate of center of best-fit ellipse, referenced to the coordinate reference frame used to plot the observations during analysis. This reference frame is defined by the maxima/minima plot points in the x and y directions, and only has meaning in that context." UNIT = "KILOMETER" DATA_TYPE = "ASCII_REAL" START_BYTE = 185 BYTES = 6 FORMAT = "F6.1" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 26 NAME = "ELLIPSE_CENTER_Y" DESCRIPTION = "Y coordinate of center of best-fit ellipse, referenced to the coordinate reference frame used to plot the observations during analysis. This reference frame is defined by the maxima/minima plot points in the x and y directions, and only has meaning in that context." UNIT = "KILOMETER" DATA_TYPE = "ASCII_REAL" START_BYTE = 192 BYTES = 6 FORMAT = "F6.1" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 27 NAME = "MAJOR_AXIS" DESCRIPTION = "Major axis of best-fit ellipse" UNIT = "KILOMETER" DATA_TYPE = "ASCII_REAL" START_BYTE = 199 BYTES = 6 FORMAT = "F6.1" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 28 NAME = "MINOR_AXIS" DESCRIPTION = "Minor axis of best-fit ellipse" UNIT = "KILOMETER" DATA_TYPE = "ASCII_REAL" START_BYTE = 206 BYTES = 6 FORMAT = "F6.1" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 29 NAME = "MAJOR_AXIS_PA" DESCRIPTION = "J2000 position angle of major axis of best-fit ellipse, measured from celestial north" UNIT = "DEGREE" DATA_TYPE = "ASCII_REAL" START_BYTE = 213 BYTES = 5 FORMAT = "F5.1" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 30 NAME = "STAR_SEP" DESCRIPTION = "Separation of second star" UNIT = "MILLIARCSECOND" DATA_TYPE = "ASCII_REAL" START_BYTE = 219 BYTES = 6 FORMAT = "F6.1" MISSING_CONSTANT = -999.9 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 31 NAME = "STAR_PA" DESCRIPTION = "J2000 position angle of second star, measured from celestial north" UNIT = "DEGREE" DATA_TYPE = "ASCII_REAL" START_BYTE = 226 BYTES = 6 FORMAT = "F6.1" MISSING_CONSTANT = -999.9 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 32 NAME = "FIT_QUAL_CODE" DESCRIPTION = "Quality code for fit: 0 - no fit, no position 1 - no fit, but observations sufficiently reliable to derive an astrometric position of the asteroid relative to the star 2 - poor fit 3 - good fit 4 - excellent fit" DATA_TYPE = "ASCII_INTEGER" START_BYTE = 233 BYTES = 1 FORMAT = "I1" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 33 NAME = "MAJOR_AXIS_SD" DESCRIPTION = "Standard deviation of MAJOR_AXIS" UNIT = "KILOMETER" DATA_TYPE = "ASCII_REAL" START_BYTE = 235 BYTES = 6 FORMAT = "F6.1" MISSING_CONSTANT = -999.9 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 34 NAME = "MINOR_AXIS_SD" DESCRIPTION = "Standard deviation of MINOR_AXIS" UNIT = "KILOMETER" DATA_TYPE = "ASCII_REAL" START_BYTE = 242 BYTES = 6 FORMAT = "F6.1" MISSING_CONSTANT = -999.9 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 35 NAME = "MAJOR_AXIS_PA_SD" DESCRIPTION = "Standard deviation of MAJOR_AXIS_PA" UNIT = "DEGREE" DATA_TYPE = "ASCII_REAL" START_BYTE = 249 BYTES = 6 FORMAT = "F6.1" MISSING_CONSTANT = -999.9 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 36 NAME = "STAR_SEP_SD" DESCRIPTION = "Standard deviation of STAR_SEP" UNIT = "MILLIARCSECOND" DATA_TYPE = "ASCII_REAL" START_BYTE = 256 BYTES = 6 FORMAT = "F6.1" MISSING_CONSTANT = -999.9 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 37 NAME = "STAR_PA_SD" DESCRIPTION = "Standard deviation of STAR_PA" UNIT = "DEGREE" DATA_TYPE = "ASCII_REAL" START_BYTE = 263 BYTES = 6 FORMAT = "F6.1" MISSING_CONSTANT = -999.9 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 38 NAME = "ELLIPSE_CENTER_X_SD" DESCRIPTION = "Standard deviation of ELLIPSE_CENTER_X" UNIT = "KILOMETER" DATA_TYPE = "ASCII_REAL" START_BYTE = 270 BYTES = 5 FORMAT = "F5.1" MISSING_CONSTANT = -99.9 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 39 NAME = "ELLIPSE_CENTER_Y_SD" DESCRIPTION = "Standard deviation of ELLIPSE_CENTER_Y" UNIT = "KILOMETER" DATA_TYPE = "ASCII_REAL" START_BYTE = 276 BYTES = 5 FORMAT = "F5.1" MISSING_CONSTANT = -99.9 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 40 NAME = "MISS_FLAG" DESCRIPTION = "Include Miss events in solution? 1 = yes, 0 = no." DATA_TYPE = "ASCII_INTEGER" START_BYTE = 282 BYTES = 1 FORMAT = "I1" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 41 NAME = "MAJOR_FLAG" DESCRIPTION = "Solve for major axis? 1 = yes, 0 = no." DATA_TYPE = "ASCII_INTEGER" START_BYTE = 284 BYTES = 1 FORMAT = "I1" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 42 NAME = "MINOR_FLAG" DESCRIPTION = "Solve for minor axis? 1 = yes, 0 = no." DATA_TYPE = "ASCII_INTEGER" START_BYTE = 286 BYTES = 1 FORMAT = "I1" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 43 NAME = "MAJOR_PA_FLAG" DESCRIPTION = "Solve for position angle of major axis? 1 = yes, 0 = no." DATA_TYPE = "ASCII_INTEGER" START_BYTE = 288 BYTES = 1 FORMAT = "I1" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 44 NAME = "SEP_FLAG" DESCRIPTION = "Solve for separation of second star? 1 = yes, 0 = no." DATA_TYPE = "ASCII_INTEGER" START_BYTE = 290 BYTES = 1 FORMAT = "I1" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 45 NAME = "STAR_PA_FLAG" DESCRIPTION = "Solve for position angle of second star? 1 = yes, 0 = no." DATA_TYPE = "ASCII_INTEGER" START_BYTE = 292 BYTES = 1 FORMAT = "I1" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 46 NAME = "CIRC_FLAG" DESCRIPTION = "Solve for circular solution? 1 = yes, 0 = no." DATA_TYPE = "ASCII_INTEGER" START_BYTE = 294 BYTES = 1 FORMAT = "I1" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 47 NAME = "PLOT_UT" DESCRIPTION = "UT of event used to position the plot during analysis. The plot is the representation of the observations in the analysis program. Its particular relevance is that it sets the initial reference frame for the calculations. The analysis works in the following manner: * The location of the observers on the fundamental plane for each event are referenced to the location of the first observation in the file * The observer locations are adjusted by the geocentric motion of the asteroid over the time difference from the first observation. This provides a notional reference frame which is fixed with respect to the asteroid; the centre of this reference frame is defined as the mean of the extremes of the observations in this frame. * The fit of the ellipse is conducted in this reference frame * The final geocentric coordinates are derived by correcting for the offset of this reference frame from the geocentric reference frame." UNIT = "HOUR" DATA_TYPE = "ASCII_REAL" START_BYTE = 296 BYTES = 11 FORMAT = "F11.6" MISSING_CONSTANT = -999.999999 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 48 NAME = "GEO_EVENT_X" DESCRIPTION = "Geocentric x of ellipse at event time" UNIT = "KILOMETER" DATA_TYPE = "ASCII_REAL" START_BYTE = 308 BYTES = 9 FORMAT = "F9.1" MISSING_CONSTANT = -999999.9 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 49 NAME = "GEO_EVENT_Y" DESCRIPTION = "Geocentric y of ellipse at event time" UNIT = "KILOMETER" DATA_TYPE = "ASCII_REAL" START_BYTE = 318 BYTES = 8 FORMAT = "F8.1" MISSING_CONSTANT = -99999.9 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 50 NAME = "GEO_CONJ_X" DESCRIPTION = "Geocentric x of ellipse at conjunction" UNIT = "KILOMETER" DATA_TYPE = "ASCII_REAL" START_BYTE = 327 BYTES = 10 FORMAT = "F10.1" MISSING_CONSTANT = -9999999.9 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 51 NAME = "GEO_CONJ_Y" DESCRIPTION = "Geocentric y of ellipse at conjunction" UNIT = "KILOMETER" DATA_TYPE = "ASCII_REAL" START_BYTE = 338 BYTES = 8 FORMAT = "F8.1" MISSING_CONSTANT = -99999.9 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 52 NAME = "GEO_CONJ_DIST" DESCRIPTION = "Geocentric distance at conjunction" UNIT = "KILOMETER" DATA_TYPE = "ASCII_REAL" START_BYTE = 347 BYTES = 8 FORMAT = "F8.1" MISSING_CONSTANT = -99999.9 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 53 NAME = "CONJ_TIME" DESCRIPTION = "Date and time at conjunction" DATA_TYPE = "TIME" START_BYTE = 356 BYTES = 22 FORMAT = "A22" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 54 NAME = "GEO_CONJ_SEP" DESCRIPTION = "Apparent geocentric separation of the asteroid and the star, at conjunction" UNIT = "ARCSECOND" DATA_TYPE = "ASCII_REAL" START_BYTE = 379 BYTES = 8 FORMAT = "F8.4" MISSING_CONSTANT = -99.9999 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 55 NAME = "GEO_CONJ_PA" DESCRIPTION = "Apparent Geocentric position angle of the asteroid relative to the star, at conjunction" UNIT = "DEGREE" DATA_TYPE = "ASCII_REAL" START_BYTE = 388 BYTES = 8 FORMAT = "F8.3" MISSING_CONSTANT = -999.999 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 56 NAME = "CONJ_SEP_ERROR" DESCRIPTION = "Uncertainty in GEO_CONJ_SEP" UNIT = "ARCSECOND" DATA_TYPE = "ASCII_REAL" START_BYTE = 397 BYTES = 6 FORMAT = "F6.1" MISSING_CONSTANT = -999.9 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 57 NAME = "CONJ_TIME_ERROR" DESCRIPTION = "Uncertainty in the UT time of conjunction" UNIT = "DAY" DATA_TYPE = "ASCII_REAL" START_BYTE = 404 BYTES = 9 FORMAT = "F9.7" MISSING_CONSTANT = -.9999999 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 58 NAME = "CHORD_NUM" DESCRIPTION = "Number of chords used in the analysis" DATA_TYPE = "ASCII_INTEGER" START_BYTE = 414 BYTES = 4 FORMAT = "I4" MISSING_CONSTANT = -999 END_OBJECT = COLUMN END_OBJECT = TABLE END