Electronic Telegram No. 5101
Central Bureau for Astronomical Telegrams
Mailing address:  Hoffman Lab 209; Harvard University;
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(15024) 1998 TB
     M. Conjat, Observatoire de la Cote d'Azur; R. Montaigut, Club
d'Astronomie de Lyon Ampere; and A. Leroy, Association T60, report that
photometric observations taken in France with a 0.40-m telescope at Nice
Observatory, the 0.50-m UniversCity telescope of Observatoire de la Cote
d'Azur, and a 0.50-m telescope at Pic du Midi Observatory during Dec. 2021 to
Feb. 2022 reveal that minor planet (15024) is a binary system with an orbital
period of 18.13 +/- 0.01 hr.  The primary shows a period of 2.4703 +/- 0.0004
hr with light-curve amplitude of 0.17 mag at solar phases 0-6 degrees,
suggesting a nearly spheroidal shape.  Mutual eclipse/occultation events that
are 0.05 to 0.12 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      superseded by text appearing later in the printed IAU Circulars.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 2022 CBAT
2022 February 16                 (CBET 5101)              Daniel W. E. Green