Electronic Telegram No. 5232
Central Bureau for Astronomical Telegrams
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(97034) 1999 UK_7
     V. Benishek, Belgrade Astronomical Observatory; P. Pravec, Ondrejov
Observatory; and A. Marchini and R. Papini, Dipartimento di Scienze Fisiche,
Della Terra e Dell'Ambiente, University of Siena, report that photometric
observations taken with a 0.35-m telescope at the Sopot Observatory in Serbia
and a 0.30-m telescope at the Astronomical Observatory of the University of
Siena during Feb. 15-23 reveal that the Mars-crossing minor planet (97034) is
a binary system with an orbital period of 15.57 +/- 0.03 hr.  The primary
shows a period of 2.3757 +/- 0.0005 hr and has a lightcurve amplitude of 0.06
mag at solar phases 14-20 degrees, suggesting a nearly spheroidal shape.
Mutual eclipse/occultation events that are 0.06 magnitude deep indicate a
lower limit on the secondary-to-primary mean-diameter ratio of 0.24.


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      superseded by text appearing later in the printed IAU Circulars.

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2023 March 12                    (CBET 5232)              Daniel W. E. Green