We provide a three-dimensional shape model of near-Earth asteroid (2100) Ra-Shalom 
    (provisional designation of 1978 RA) based on radar images and optical photometry 
    from Shepard et al. 2008.  Radar observations from Arecibo Observatory in 2000 and
    2003 were used to construct the 3-D shape model.  Other observatories provided 
    observations at other wavelengths to characterize (2100) Ra-Shalom.  These data 
    build upon the 1984 radar observations presented in Shepard et al. 2000.  The model 
    provides a good match to the imagine resolution of 75 to 150 m.  The model provides
    an effective diameter is 2.3 +/- 0.2 km and a sidereal rotation period of 
    19.793 +/- 0.001 h.



    REFERENCES
    ==========
    Shepard, M.K., B.E. Clark, M.C. Nolan, L.A.M Benner, S.J. Ostro, and 12
    others, Multi-wavelength observations of Asteroid 2100 Ra-Shalom, Icarus
    193, 20-38, 2008, doi:10.1016/j.icarus.2007.09.006.

    Shepard, M.K., L.A.M. Benner, S.J. Ostro, A.W. Harris, K.D. Rosema, and 3 others,
    Radar observations of asteroid 2100 Ra-Shalom, Icarus, 147, 520-529, 2000,
    doi:10.1006/icar.2000.6470.