Electronic Telegram No. 5649
Central Bureau for Astronomical Telegrams
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(13234) NATASHAOWEN
     V. Benishek, Belgrade Astronomical Observatory; P. Pravec, Ondrejov
Observatory; R. Goncalves, Linhaceira, Tomar, Portugal; F. Vachier,
Observatoire de Paris; and A. Klotz, J. Berthier, and P. Thierry, Observatoire
des Makes, Reunion, report that photometric observations taken with a 0.35-m
telescope at the Sopot Observatory in Serbia, a 0.35-m telescope at Linhaceira
Observatory, and a 0.6-m telescope at the Observatoire des Makes during Oct.
20-Nov. 21 reveal that minor planet (13234) is a binary system with an orbital
period of 16.315 +/- 0.004 hr.  The primary has a period of 2.6877 +/- 0.0002
hr and a lightcurve amplitude of 0.10 magnitude at solar phases 3-5 degrees,
suggesting a nearly spheroidal shape.  Mutual eclipse/occultation events that
are 0.07 magnitude deep indicate a secondary-to-primary mean-diameter ratio of
0.26 +/- 0.02.


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2025 December 18                 (CBET 5649)              Daniel W. E. Green