Electronic Telegram No. 1165
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


(3673) LEVY
     D. Pray, Carbuncle Hill Observatory, Greene, RI, U.S.A.; P. Pravec and P.
Kusnirak, Ondrejov Observatory; and R. Stephens, Goat Mountain Astronomical
Research Station, Yucca Valley, CA, U.S.A., report that photometric
observations obtained during Dec. 5-9 reveal that minor planet (3673) is a
binary system with an orbital period of 21.6 hr.  The primary shows a period
of 2.6879 +/- 0.0005 hr, and it has a lightcurve amplitude of 0.13 mag,
suggesting a nearly spheroidal shape.  Mutual eclipse/occultation events
indicate a secondary-to-primary mean-diameter ratio of 0.28 +/- 0.03.  The
system's parameters need to be refined with further observations.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2007 CBAT
2007 December 12                 (CBET 1165)              Daniel W. E. Green