[IAUC] CBET 617: 20060904 : (2754) EFIMOV

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                                                  Electronic Telegram No. 617
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS en CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT en CFA.HARVARD.EDU (science)
URL http://cfa-www.harvard.edu/iau/cbat.html


(2754) EFIMOV
     D. Pray, Carbuncle Hill Observatory, Greene, RI; P. Pravec,
Ondrejov Observatory; M. Pikler and M. Husarik, Skalnate Pleso
Observatory; R. Stephens, Goat Mountain Astronomical Research
Station, Yucca Valley, CA; G. Masi, Bellatrix Observatory, Ceccano,
Italy; R. Durkee, Minneapolis, MN; and R. Goncalves, Linhaceira,
Tomar, Portugal, report that photometric observations obtained
during Aug. 14-Sept. 1 reveal that minor planet (2754) is a binary
system with an orbital period of 14.765 +/- 0.01 hours.  The primary
rotates with a period of 2.4497 +/- 0.0002 hours, and it has a
lightcurve amplitude of 0.15 mag.  Mutual eclipse/occultation
events that are 0.04-0.09 mag deep indicate a secondary-to-primary
mean-diameter ratio of 0.20 +/- 0.03.


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                         (C) Copyright 2006 CBAT
2006 September 4                 (CBET 617)               Daniel W. E. Green