Electronic Telegram No. 3372
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


(1052) BELGICA
      L. Franco, Rome, Italy; P. Pravec, Ondrejov Observatory; A. Ferrero,
Mombercelli, Asti, Italy; and L. Martinez, Casa Grande, AZ, USA, report that
photometric observations carried out during 2012 Nov. 17-Dec. 18 reveal that
the minor planet (1052) is a binary system with an orbital period of 47.26 ±
0.02 hr.  The rotational light curve of the primary has a period of 2.7097 ±
0.0001 hr with an amplitude of 0.08 mag that suggests a nearly spheroidal
shape.  The depth of the secondary event observed on 2012 Dec. 6.9 (0.13 mag)
gives a lower limit on the secondary-to-primary mean diameter ratio of 0.36
± 0.02.


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       superseded by text appearing later in the printed IAU Circulars.

                          (C) Copyright 2013 CBAT
2013 January 7                   (CBET 3372)              Daniel W. E. Green