[IAUC] CBET 910: 20070327 : (1338) DUPONTA

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                                                  Electronic Telegram No. 910
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
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CBAT en CFA.HARVARD.EDU (science)
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(1338) DUPONTA
     S. Gajdos, L. Kornos, J. Vilagi, and A. Galad, Modra Observatory; P.
Pravec, Ondrejov Observatory; R. Stephens, Goat Mountain Astronomical
Research Station, Yucca Valley, CA; V. Reddy, Department of Earth System
Science and Policy, University of North Dakota, Grand Forks; R. Dyvig,
Quinn, SD; D. Higgins, Canberra, Australia; J. Oey, Leura, N.S.W.,
Australia; and D. Pray, Carbuncle Hill Observatory, Greene, RI, report
that photometric observations obtained during Mar. 6-26 reveal that minor
planet (1338) is a binary system with an orbital period of 17.57 +/- 0.01
hr.  The primary shows a period of 3.85453 +/- 0.00009 hr, and it has a
lightcurve amplitude of 0.23 mag.  Mutual eclipse/occultation events that
are 0.06- to 0.12-mag deep indicate a secondary-to-primary mean-diameter
ratio of 0.23 +/- 0.02.


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                         (C) Copyright 2007 CBAT
2007 March 27                    (CBET 910)               Daniel W. E. Green