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 NULL
DATA_SET_TERSE_DESCRIPTION Radiometric diameters and albedos of asteroids from TRIAD (Tucson Revised Index of Asteroid Data)
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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