Electronic Telegram No. 860 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 (2486) METSAHOVI M. Pikler, M. Husarik, and G. Cervak, Skalnate Pleso Observatory; W. Cooney, J. Gross, and D. Terrell, Sonoita Research Observatory, Sonoita, AZ; P. Pravec and P. Kusnirak, Ondrejov Observatory; A. Galad, J. Vilagi, L. Kornos, and S. Gajdos, Modra Observatory; V. Reddy, Department of Earth System Science and Policy, University of North Dakota, Grand Forks; and R. Dyvig, Quinn, SD, report that photometric observations obtained during 2006 Dec. 12 to 2007 Jan. 26 reveal that (2486) has a lightcurve consisting of two linearly additive components with periods 4.4518 and 2.6404 hr and amplitudes 0.12 and 0.04 mag, respectively. No attenuations due to occultations/eclipses were seen, so the proposed interpretation of binary nature of the minor planet needs to be confirmed with further observations. The mean absolute R magnitude in the Cousins system is 12.14 +/- 0.2, assuming G = 0.15 +/- 0.2. NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2007 CBAT 2007 February 26 (CBET 860) Daniel W. E. Green