Electronic Telegram No. 5526
Central Bureau for Astronomical Telegrams
Mailing address:  Hoffman Lab 209; Harvard University;
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(9006) VOYTKEVYCH
     V. Benishek, Belgrade Astronomical Observatory; P. Pravec, Ondrejov
Observatory; and R. Goncalves, Linhaceira, Tomar, Portugal, report that
photometric observations taken with a 0.35-m telescope at the Sopot
Observatory in Serbia and a 0.35-m at the Linhaceira Observatory during 2024
Dec. 22-2025 Feb. 6 reveal that minor planet (9006) is a binary system with
an orbital period of 18.428 +/- 0.003 hr.  The primary shows a period of
2.69509 +/- 0.00008 hr and has a lightcurve amplitude of 0.26 magnitude at
solar phases 5-7 degrees.  Mutual eclipse/occultation events that are 0.05
magnitude deep indicate a lower limit on the secondary-to-primary mean-
diameter ratio of 0.22.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2025 CBAT
2025 March 18                    (CBET 5526)              Daniel W. E. Green