Data Set Information
DATA_SET_NAME TRIAD RADIOMETRIC DIAMETERS AND ALBEDOS V1.0
DATA_SET_ID EAR-A-COMPIL-5-TRIADRAD-V1.0
NSSDC_DATA_SET_ID
DATA_SET_TERSE_DESCRIPTION
DATA_SET_DESCRIPTION Data Set Overview : The radiometric observations used for the Tucson Revised Index of Asteroid Data (TRIAD) compilation consist of broadband radiometry at 10 microns (the N band) and 20 microns (the Q band). Observations from 1972 through 1978 have been used. The results are compiled in Morrison and Zellner (1979). References to the observation papers for each entry are given in the associated references file. The observations have been interpreted with the standard model described in Morrison and Lebofsky (1979), using the computer code of Jones and Morrison (1974). Further details of the analysis are described in Morrison and Lebofsky (1979). This data set includes radiometric diameters and albedos for 195 asteroids. Each asteroid is assigned a quality code as follows: Code 1 is assigned to single observations or to data with large internal uncertainties; these values may not be individually reliable and should be used with caution. Code 2 is assigned in a broad range of situations, including at the minimum two independent measurements on a good photometric night. This code indicates basically secure, believable results. Code 3 is assigned excellent, consistent, multiply-verified data, almost always at both 10 and 20 microns. Usually observations from several nights are required to justify Code 3. While it is not possible to associate a code directly with uncertainties, the three codes correspond roughly to internal uncertainties in the diameters of +/- 20%, 10%, and 5% respectively. The possibility exists of additional errors of up to 10% in the overall diameter calibration, due to the absolute flux calibration. This data set description has been adapted from Morrison and Lebofsky (1979). References: Jones, T.J. and D. Morrison, A recalibration of the radiometric/photometric method of determining asteroid sizes, Astron. J. 79, 892-895, 1974. [JONES&MORRISON1974] Morrison, D., and B. Zellner, Polarimetry and radiometry of the asteroids, in Asteroids, edited by T. Gehrels, pp. 1090-1097, University of Arizona Press, Tucson, 1979. [MORRISON&ZELLNER1979] Morrison, D. and L. Lebofsky, Radiometry of Asteroids, in Asteroids, T. Gehrels, Ed. (University of Arizona Press, Tucson), pp. 184-205, 1979. [MORRISON&LEBOFSKY1979]
DATA_SET_RELEASE_DATE 2007-05-24T00:00:00.000Z
START_TIME 1972-01-01T12:00:00.000Z
STOP_TIME 1978-12-31T12:00:00.000Z
MISSION_NAME SUPPORT ARCHIVES
MISSION_START_DATE 2004-03-22T12:00:00.000Z
MISSION_STOP_DATE N/A (ongoing)
TARGET_NAME ASTEROID
TARGET_TYPE ASTEROID
INSTRUMENT_HOST_ID PUBLIT
INSTRUMENT_NAME COMPILATION
INSTRUMENT_ID COMPIL
INSTRUMENT_TYPE UNKNOWN
NODE_NAME Small Bodies
ARCHIVE_STATUS ARCHIVED
CONFIDENCE_LEVEL_NOTE Confidence Level Overview : The confidence level of each entry is indicated in the quality code, described above in the data set description.
CITATION_DESCRIPTION Morrison, D. and Zellner, B., TRIAD Radiometric Diameters and Albedos V1.0. EAR-A-COMPIL-5-TRIADRAD-V1.0. NASA Planetary Data System, 2007.
ABSTRACT_TEXT This data set reproduces the Tucson Revised Index of Asteroid Data (TRIAD) radiometric asteroid diameters and albedos tabulated in Morrison and Zellner (1979). Albedos and diameters for 195 asteroids are included.
PRODUCER_FULL_NAME CAROL NEESE
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