Data Set Overview
      =================
      This data set includes 3-micron spectra of asteroids taken by Andy
      Rivkin (1995) [RIVKINETAL1995].  The spectra include both measured
      reflectance and error bars at six points in the range 1.25-3.35
      microns.  17 spectra of 16 different asteroids are included. One
      asteroid, 77 Frigga, is included in this data set but was not
      mentioned in Rivkin, et al. (1995).
 
 
      Modification History
      ====================
      This dataset was first ingested into the PDS archives following
      the March 1998 asteroid data sets review.
 
      In March 2002 the data were re-examined as part of a general
      review of holdings. As a result, the following changes were made:
 
        o The data from tables I ('Targets Observed') and II
          ('Observational Circumstances') of Rivkin, et al. (1995)
          were incorporated into the main data file.
 
        o The main data file was split into (additional) separate
          files for each object. The data for the 1991 and 1993
          observations of 44 Nysa were placed in separate files.
 
        o As much information as could be gleaned from the published
          article was used to create the instrument catalog file now
          archived with this data. PDS cataloging fields have been
          filled in as far as possible.
 
        o This data set catalog file was updated to contain the
          modification list and the complete list of specific
          target names for objects observed.
 
 
      Parameters
      ==========
 
      The data table lists asteroid number, a spectrum identifier, and
      the measured reflectance and one-standard-deviation error at
      1.25, 1.65, 2.20, 2.95, 3.12 and 3.35 microns.

Review
      ======
      This version of the data set underwent external peer review on
      May 10, 2002.