Electronic Telegram No. 4353
Central Bureau for Astronomical Telegrams
Mailing address:  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


(226514) 2003 UX_34
     M. Brozovic, L. A. M. Benner, S. P. Naidu, J. D. Giorgini, J. S. Jao,
C. G. Lee, L. G. Snedeker, M. A. Slade, and K. J. Lawrence, Jet Propulsion
Laboratory, California Institute of Technology; and E. G. Rivera-Valentin
and P. A. Taylor, Arecibo Observatory, USRA, write that Goldstone (X-band,
8560 MHz, 3.5 cm) and Arecibo (S-Band, 2380 MHz, 12.6 cm) delay-Doppler radar
images and echo power spectra obtained during 2017 Jan. 2-8 reveal that the
near-earth Apollo-type minor planet (226514) is a binary system.  The visible
extents of the primary and secondary with 7.5 m/pixel resolution imply
diameters of about 250-300 m and about 80-120 m, respectively.  The maximum
separation between the satellite and the primary was about 450 m.  A
preliminary orbital fit suggests that the size of the semi-major axis is
comparable with the maximum separation and that the orbital period is in the
realm of 15 hours.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2017 CBAT
2017 February 3                  (CBET 4353)              Daniel W. E. Green