Electronic Telegram No. 1957
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT@CFA.HARVARD.EDU (science)
URL http://www.cfa.harvard.edu/iau/cbat.html


2000 CO_101
     P. A. Taylor, M. C. Nolan, and E. S. Howell, Arecibo Observatory, NAIC;
C. Magri, University of Maine at Farmington; L. A. M. Benner, M. Brozovic,
and J. D. Giorgini, Jet Propulsion Laboratory, California Institute of
Technology; M. W. Busch, California Institute of Technology; M. K. Shepard,
Bloomsburg University; and J. L. Margot, University of California, Los
Angeles, report that Arecibo (2380-MHz, 12.6-cm) radar observations made on
Sept. 26 reveal that minor planet 2000 CO_101 (cf. MPEC 2000-D04) is a binary
system.  Preliminary estimates of the component diameters, based on visible
range extents, are 525 m for the primary and 45 m for the secondary.  The
maximum range-Doppler separation between the components was 560 m and 1.1 Hz
at Sept. 26.95 UT.


NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2009 CBAT
2009 October 2                   (CBET 1957)              Daniel W. E. Green