Electronic Telegram No. 3175
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
CBAT Director:  Daniel W. E. Green; Hoffman Lab 209; Harvard University;
 20 Oxford St.; Cambridge, MA  02138; U.S.A.
e-mail:  cbatiau@eps.harvard.edu (alternate cbat@iau.org)
URL http://www.cbat.eps.harvard.edu/index.html
Prepared using the Tamkin Foundation Computer Network


2007 LE
     M. Brozovic and L. A. M. Benner, Jet Propulsion Laboratory, California
Institute of Technology; P. A. Taylor, E. S. Howell, and M. C. Nolan,
National Astronomy and Ionosphere Center; J. L. Margot, University of
California, Los Angeles; J. D. Giorgini, Jet Propulsion Laboratory, California
Institute of Technology; M. W. Busch, S. P. Naidu, and C. Nugent, University
of California, Los Angeles; C. Magri, University of Maine at Farmington; and
M. K. Shepard, Bloomsburg University, report that Goldstone (8560 MHz, 3.5 cm)
and Arecibo (2380 MHz, 12.6 cm) delay-Doppler radar images obtained on May 31-
June 5 reveal that minor planet 2007 LE is a binary system.  Based on visible
range extents at 7.5-m resolution, a preliminary estimate of the diameters are
about 500 m for the primary and about 180 m for the satellite.  Arecibo
delay-Doppler images on June 2 show the secondary eclipsed by the primary for
about 1 hour.  The orbital separation is at least 800 m, and the authors
obtain a preliminary estimate for the orbital period of about 13 hr.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2012 CBAT
2012 July 13                     (CBET 3175)              Daniel W. E. Green