Definition of IMPS Final Product # 101 IMPS Final Product Formats Data Base This lists formats of all the machine-readable IMPS final products (including this one, # 101, but excluding the hard copy catalog, # 100). Remarks under this include short descriptions of each field. Individual introductions to each table are also included. Definition of format for IMPS Final Product # 101: Title -- IMPS Formats Catalog Header -- Parameter, Format, Unit, Remark List -- Parameters, PC code formats, units and remarks Note: For asteroid type = 1, asteroid identification number < 4680 For asteroid type = 2, asteroid identification number < 2633 ______________________________________________________________________________ Definition of format for IMPS Final Product # 102 IMPS Albedos and Diameters Data Base A distilled summary of the averaged results for 1,796 numbered asteroids and 88 Type-2 asteroids which have at least two final accepted band observations used. The results are collated by asteroid in ascending numerical order for types 1 and 2. Entries include: asteroid type, identification number, name or provisional designation for type 1 and provisional designation for type 2, absolute magnitude, number of sightings used, best values for averaged derived albedo and diameter together with the one sigma uncertainty for each, the probability that an intrisic flux variation ("lightcurve") influenced the results, the number of sightings (i.e., detected crossings of the IRAS focal plane), the number of fluxes ("observations") averaged, the fraction-observed ratio (i.e., the ratio of the total number of times the asteroid was predicted to cross the IRAS focal plane versus the actual number of crossings realized, and the 32-bit asteroid status word (ASTATW). Parameter Format Units Remarks AstTyp I2 - asteroid type AstID I5 - asteroid identification number Name A16 - IAU designation H F5.2 mag absolute visual magnitude PHMean F6.4 - mean visual albedo on the H, G system SigPHMean F5.3 - 1 sigma pH uncertainty DiaMean F7.2 km mean diameter SigDiaMean F6.1 km 1 sigma diameter uncertainty ProbLtCurv F4.2 - probability of lightcurve effects NUseSight I2 - number of used sightings NUseObs I2 - number of used observations (all bands) FOR F4.2 - fraction-observed ratio AStatW 32I1 - Or'd accepted status word bits ----------------------------------------------------------------- No. columns: 96 ______________________________________________________________________________ Definition of format for IMPS Final Product # 103: IMPS Singleton Data Base A distilled summary of the results for 94 numbered asteroids and 26 Type-2 asteroids which have only one final accepted band observation used. The format is the same used for # 102. The results are collated by asteroid in ascending numerical order for types 1 and 2. Entries include: asteroid type, identification number, name or provisional designation for type 1 and provisional designation for type 2, absolute magnitude, number of sightings used, best values for averaged derived albedo and diameter together with the one sigma uncertainty for each, the probability that an intrisic flux variation ("lightcurve") influenced the results, the number of sightings (i.e., detected crossings of the IRAS focal plane), the number of fluxes ("observations") averaged, the fraction-observed ratio (i.e., the ratio of the total number of times the asteroid was predicted to cross the IRAS focal plane versus the actual number of crossings realized, and the 32-bit asteroid status word (ASTATW). Because this format is identical to that for FP102, some counters can, and do, only have values of zero (e.g., ProbLtCurv) or unity (e.g., NUseSight and NUseObs). Parameter Format Units Remarks AstTyp I2 - asteroid type AstID I5 - asteroid identification number Name A16 - IAU designation H F5.2 mag absolute visual magnitude PHMean F6.4 - mean visual albedo on the H, G system SigPHMean F5.3 - 1 sigma pH uncertainty DiaMean F7.2 km mean diameter SigDiaMean F6.1 km 1 sigma diameter uncertainty ProbLtCurv F4.2 - probability of lightcurve effects NUseSight I2 - number of used sightings NUseObs I2 - number of used observations (all bands) FOR F4.2 - fraction-observed ratio AStatW 32I1 - Or'd accepted status word bits ----------------------------------------------------------------- No. columns: 96 ______________________________________________________________________________ Definition of format for IMPS Final Product # 104: IMPS Statistics Data Base Summary of the number of times each asteroid was sighted, the number of times it was predicted to be scanned, and possible reasons for any failure to be detected. There is an entry for each of 4,679 numbered asteroids and 2,632 Type-2 asteroids (including those for which no IMPS sightings exist) collated by asteroid in ascending numerical order for types 1 and 2. Entries include: asteroid type, identification number, number of predicted sightings, number of accepted sightings, number of rejected sightings, number of missed predicted sightings, number of missed predicted faint sightings, number of dead 25 micron detector non-detections, number of noisy 25 micron detector non-detec- tions, number of missed predictions in the galactic center region, and other non-detections. Parameter Format Units Remarks AstTyp I2 - asteroid type AstID I5 - asteroid identification number P I2 - predicted sightings S I2 - accepted sightings R I2 - rejected sightings M I2 - missed predicted sightings F I2 - too faint to expect a detection D I2 - dead 25 micron detector non-detections N I2 - noisy 25 micron detector non-detections G I2 - galactic center matches X I2 - other non-detections -------------------------------------------------------------------- No. columns: 25 ______________________________________________________________________________ Definition of format for IMPS Final Product # 105: IMPS Reject Data Base Summary of the number of rejected sightings for each asteroid and possible reasons for rejection. There is an entry for each of 1,732 numbered asteroids and 655 Type-2 asteroids for which at least one sighting was rejected, col- lated by asteroid in ascending numerical order for types 1 and 2. Entries include: asteroid type, identification number, number of rejected sightings, number of weeks-confirmed (MCON) sightings, number of sightings confused with sources in the IRAS Point Source Catalog (PSC) Version 2, number of sightings whose detectors were all outer slots only (i.e., at the edge of the survey array), number of sightings confused with sources in the IRAS Faint Source Catalog (FSC) Version 2, number of sightings confused with sources in the IRAS Serendipitous Survey Catalog (SSC), number of times more than one source was associated with a single asteroid prediction, number of sightings with posi- tion match scores below the final threshold, 0.4 (these sightings are a subset of those with AStatW bit number 1 set), number of sightings detected only at 25 microns with flux status less than 5 (i.e., not fully seconds-confirmed), number of singletons with flux status less than 5, number of sightings with uniform cross-scan uncertainties above 5 arcmin, number of times the color test failed, number of sightings with at least one band having an unacceptable confusion status, number of sightings in which at least one band had an unnacceptably low detection correlation coefficient, number of rejected sightings in which the low-albedo test failed in at least one band, number of rejected sightings in which an albedo solution failed to converge in at least one band, and the number of rejected sightings in which an albedo was rejected from the final average by the Chauvenet criterion in at least one band. Parameter Format Units Remarks AstTyp I2 - asteroid type AstID I5 - asteroid identification number R I2 - rejected sightings M I2 - MCON sightings (AStatW bit # 5) P I2 - PSC matches (AStatW bit # 9) O I2 - outer slots only (AStatW bit # 10) F I2 - FSC matches (AStatW bit # 17) S I2 - SSC matches (AStatW bit # 20) I I2 - 2+ sightings matches (AStatW bit # 31) L I2 - low position-match score B I2 - band-2-only with flux status < 5 Z I2 - singletons with flux status < 5 U I2 - cross-scan uncertainty > 5 arcmin C I2 - color failures Q I2 - confusion status failures D I2 - correlation coefficient failures A I2 - low albedos ( < 0.01 ) N I2 - albedo solutions not converged E I2 - albedo eliminated by Chauvenet criterion ---------------------------------------------------------------------- No. columns: 41 ______________________________________________________________________________ Definition of format for IMPS Final Product # 106: IMPS Missed-Predictions Data Base Summary of the always missed asteroids. The entries are collated by predicted asteroid in ascending numerical order for types 1 and 2. Entries include the asteroid type, identification number, number of times predicted to be scanned but missed, and the derived greatest lower limit on the albedo range and least upper limit on the diameter range for each asteroid plus the analogous OR'd AStatW status word. There is an entry for each of 1,653 numbered asteroids and 1,765 Type-2 asteroids which were scanned but did not generate any IMPS aster- oid associations. Entries include: asteroid type, number, name or provisional designation for type 1 and provisional designation for type 2, number of missed predicted scans, H, G, estimated visual albedo and diameter, the greatest lower bound on the albedo, the least upper bound on the diameter and the OR'd predic- tion status word. Parameter Format Units Remarks AstTyp I2 - asteroid type AstID I5 - asteroid identification number Name A16 - IAU designation NMiss I2 - no. of missed predicted scans HMist F5.2 mag absolute visual magnitude GMist F6.3 - slope parameter AlbMst F6.4 - visual albedo estimate DiaMst F7.2 km diameter estimate AlbGLB F6.4 - greatest lower albedo limit DiamLUB F7.2 km least upper diameter limit PStatW 32I1 - OR'd prediction status word bits ---------------------------------------------------------------- No. columns: 94 ______________________________________________________________________________ Definition of format for IMPS Final Product # 107: IMPS Ground-Based Data Data Base A listing of ground-based and IRAS Asteroid and Comet Survey Catalog (1986) data used to reduce the IMPS observations. There is an entry for each of 4,679 numbered asteroids and 2,632 Type-2 asteroids (including those for which no IMPS sightings exist) collated by asteroid in ascending numerical order for types 1 and 2. Entries include: asteroid type, identification number, name or provisional designation for type 1 and provisional designation for type 2, H, G, the estimated (0.01 default) geometric visual albedo, the estimated diameter, the adopted taxonomic classification and the orbital elements at three epochs (time of perihelion passage, mean anomaly, argument of perihelion, longitude of ascending node, inclination, eccentricity and perihelion distance; the Julian dates of the epochs are 2445400.5, 2445500.5, and 2445600.5). Because the total number of columns of data exceeds 255, Final Product # 107 is broken up into four files named FP107.A, FP107.B, FP107.C, and FP107.D, with the formats given below. FP107.A Formats Parameter Format Units Remarks AstTyp I2 - asteroid type AstID I5 - asteroid identification number Name A16 - IAU designation H F5.2 mag absolute visual magnitude G F6.3 - slope parameter Alb F6.4 - estimated visual albedo (0.01 default) D F7.2 km estimated diameter Class A3 - taxonomic classification -------------------------------------------------------------------- No. columns: 50 FP107.B, FP107.C, and FP107.D Formats (the lower case "n" in the parameter name is 1, 2, and 3 for FP107B, FP107.C, and FP107.D, respectively; these three files have identical formats and correspond to the three different epochs mentioned above.) Parameter Format Units Remarks AstTyp I2 - asteroid type AstID I5 - asteroid identification number EPnUT F14.5 JD time of perihelion passage Mn F11.6 degree mean anomaly APn F11.6 degree argument of perihelion LAn F11.6 degree longitude of ascending node In F11.6 degree inclination En F9.6 - eccentricity PDnAU F9.6 AU perihelion distance An F9.6 AU semimajor axis ---------------------------------------------------------------- No. columns: 92 ______________________________________________________________________________ Definition of format for IMPS Final Product # 108: IMPS Sightings Data Base A listing of 7,937 accepted sightings associated with 1,890 numbered asteroids and 273 accepted sightings associated with 114 Type-2 asteroids. The sightings are collated by asteroid in ascending numerical order for types 1 and 2. Entries include: asteroid type, identification number, date and UT of the observation, the IRAS sighting time tag, SOP and OBS numbers, the IRAS-derived observed right ascension and declination, twist angle, ecliptic longitude and latitude, galactic longitude and latitude positions, heliocentric distance, geocentric distance, phase angle, predicted right ascension and declination position, predicted apparent visual magnitude, the derived albedo and diameter in each of the four IRAS bands along with their one-sigma uncertainties, in and cross-scan uncertainties and cross-scan uncertainty half-width, the position match score, the difference between the predicted and observed position, the factor used to correct for low flux over-estimation, the predicted flux density, the flux density observed (INCLUDING the low flux over-estimation correction), the flux density sigma, the signal to noise ratio, the detector ID array, the correlation coefficients, the derived status word, the confusion status word, the flux status, and the sighting status word. Because the total number of columns of data exceeds 255, Final Product # 108 is broken up into three files named FP108.A, FP108.B, and FP108.C, with the formats given below. FP108.A Formats Parameter Format Units Remarks AstTyp I2 - asteroid type AstID I5 - asteroid identification number ObsDate I2 - month of observation (year 1983) I2 - day of month of observation ObsTime I2 hr hour of observation (UTC) I2 min minute of observation (UTC) I2 sec second of observation (UTC) AstNam I9 decisec sighting time tag SOP I3 - SOP number OBS I2 - OBS number ObsRA I2 hour right ascension (observed) I2 minute " " F4.1 sec " " ObsDec I3 degree declination (observed) I2 minute " I2 second " AstGaC F5.1 degree celestial twist angle AstELong F8.4 degree ecliptic longitude AstELat F8.4 degree ecliptic latitude AstGLong F8.4 degree galactic longitude AstGLat F8.4 degree galactic latitude PrdRAS F6.3 AU heliocentric distance PrdREA F6.3 AU geocentric distance PrdAlp F7.2 degree phase angle (negative before opp.) PrdRA I2 hour right ascension (predicted) I2 minute " " F4.1 sec " " PrdDec I3 degree declination (predicted) I2 minute " I2 second " V F5.2 mag apparent visual magnitude Albedo 4F6.4 - derived visual albedo (four bands) AlbedoUnc 4F6.4 - 1-sigma uncertainties in Albedo Diam 4F7.2 km diameter (four bands) DiamUnc 4F7.2 km 1-sigma uncertainties in Diam ------------------------------------------------------------------ No. columns: 226 FP108.B Formats Parameter Format Units Remarks AstTyp I2 - asteroid type AstID I5 - asteroid identification number ObsDate I2 - month of observation (year 1983) I2 - day of month of observation ObsTime I2 hr hour of observation (UTC) I2 min minute of observation (UTC) I2 sec second of observation (UTC) AstSgY F5.3 arcmin one sigma in scan uncertainty AstSgZ F5.3 arcmin one sigma cross scan uncertainty AstLZ F6.3 arcmin cross scan uncertainty half width Score F5.3 - position match score PosDiff F7.1 arcsec position difference |pred - obs| FCorr 4F5.3 - low flux correction factor (four bands) PrdFlx 4F7.3 jansky predicted flux density (four bands) AstFlx 4F8.3 jansky observed flux density (four bands) AstSgF 4F8.3 jansky flux density sigma (four bands) AstSNR 4F7.2 - signal to noise ratio (four bands) ---------------------------------------------------------------------- No. columns: 185 FP108.C Formats Parameter Format Units Remarks AstTyp I2 - asteroid type AstID I5 - asteroid identification number ObsDate I2 - month of observation (year 1983) I2 - day of month of observation ObsTime I2 hr hour of observation (UTC) I2 min minute of observation (UTC) I2 sec second of observation (UTC) AstDts 4I5 - detector id array (four bands) AstCor 4I3 - correlation coefficients (four bands) ADStat 4I8 - derived status word (four bands) bits AstCSt 4I8 - confusion status word (four bands) bits AstFSt 4I1 - flux status word (four bands) AStatW 32I1 - sighting status word bits ---------------------------------------------------------------------- No. columns: 149