Electronic Telegram No. 414 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://cfa-www.harvard.edu/iau/cbat.html (9617) GRAHAMCHAPMAN D. Pray, Carbuncle Hill Observatory, Greene, RI; P. Pravec and P. Kusnirak, Ondrejov Observatory; V. Reddy, Department of Space Studies, University of North Dakota, Grand Forks; R. Dyvig, Quinn, SD; and S. Gajdos, Modra Observatory, report that photometric observations obtained during 2006 Jan. 27 to Feb. 28 reveal that minor planet (9617) is a binary system with an orbital period of 19.385 +/- 0.005 hours. The primary rotates with a period of 2.2856 +/- 0.0001 hours, and its lightcurve amplitude of 0.10 mag is indicative of a nearly spheroidal shape. Mutual eclipse/occultation events that are 0.07- to 0.16-mag deep indicate a secondary-to-primary mean-diameter ratio of 0.27 +/- 0.03. NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2006 CBAT 2006 March 1 (CBET 414) Daniel W. E. Green