Electronic Telegram No. 5479
Central Bureau for Astronomical Telegrams
Mailing address:  Hoffman Lab 209; Harvard University;
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Prepared using the Tamkin Foundation Computer Network


(3658) FELDMAN
     V. Benishek, Belgrade Astronomical Observatory; P. Pravec, Ondrejov
Observatory; and R. Durkee, Shed of Science South Observatory, Pontotoc, TX,
U.S.A., report that photometric observations taken with a 0.35-m telescope at
the Sopot Observatory in Serbia and a 0.50-m telescope at the Shed of Science
South Observatory during Oct. 24-Nov. 24 reveal that minor planet (3658) is a
binary system with an orbital period of 111.2 +/- 0.2 hr.  The primary shows
a period of 3.4545 +/- 0.0002 hr and has a lightcurve amplitude of 0.09
magnitude at solar phases 3-11 degrees, suggesting a nearly spheroidal shape.
Mutual eclipse/occultation events that are 0.11 magnitude deep indicate
a secondary-to-primary mean-diameter ratio of 0.33 +/- 0.02.


NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2024 CBAT
2024 December 19                 (CBET 5479)              Daniel W. E. Green