[IAUC] CBET 1716: 20090311 : (4607) SEILANDFARM

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                                                  Electronic Telegram No. 1716
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://www.cfa.harvard.edu/iau/cbat.html


(4607) SEILANDFARM
     D. Pray, Carbuncle Observatory, W. Brookfield, MA, U.S.A.; P. Kusnirak
and P. Pravec, Ondrejov Observatory; J. Gross, W. Cooney, and D. Terrell,
Sonoita Research Observatory, Sonoita, AZ; and R. Durkee, Minneapolis, MN,
report that photometric observations obtained during Jan. 17-Feb. 25 reveal
that minor planet (4607) is a binary system with an orbital period of 31.63
+/- 0.02 hr.  The primary shows a period of 3.9683 +/- 0.0001 hr, and it has
a lightcurve amplitude of 0.15 mag, suggesting a nearly spheroidal shape.
Mutual eclipse/occultation events indicate a lower limit on secondary-to-
primary mean-diameter ratio of 0.29.


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                         (C) Copyright 2009 CBAT
2009 March 11                    (CBET 1716)              Daniel W. E. Green