Electronic Telegram No. 5114
Central Bureau for Astronomical Telegrams
Mailing address:  Hoffman Lab 209; Harvard University;
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(4411) KOCHIBUNKYO
     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 Feb. 2-Mar. 26 reveal that minor planet (4411) is a
binary system with an orbital period of 11.985 +/- 0.010 hr.  The primary
shows a period of 2.69614 +/- 0.00006 hr and has a lightcurve amplitude of
0.16 magnitude at solar phases 2-16 degrees, suggesting a nearly spheroidal
shape.  Mutual eclipse/occultation events that are 0.05 to 0.09 magnitude
deep indicate a secondary-to-primary mean-diameter ratio of 0.21 +/- 0.02.


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      superseded by text appearing later in the printed IAU Circulars.

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2022 April 15                    (CBET 5114)              Daniel W. E. Green