Electronic Telegram No. 5319
Central Bureau for Astronomical Telegrams
Mailing address:  Hoffman Lab 209; Harvard University;
 20 Oxford St.; Cambridge, MA  02138; U.S.A.
e-mail:  cbatiau@eps.harvard.edu (alternate cbat@iau.org)
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Prepared using the Tamkin Foundation Computer Network


(7355) BOTTKE
     V. Benishek, Belgrade Astronomical Observatory; P. Pravec, Ondrejov
Observatory; D. Pray, Sugarloaf Mountain Observatory, South Deerfield, MA,
U.S.A.; and J. Oey, Blue Mountains Observatory, Leura, NSW, Australia, report
that photometric observations taken with a 0.35-m telescope at the Sopot
Observatory in Serbia, a 0.63-m telescope at the Sugarloaf Mountain
Observatory, and a 0.35-m telescope at the Blue Mountains Observatory during
Oct. 29-Nov. 17 reveal that minor planet (7355) is a binary system with an
orbital period of 40.85 +/- 0.04 hr.  The primary shows a period of 2.6364 +/-
0.0002 hr and has a lightcurve amplitude of 0.26 mag at solar phases 15-22
degrees.  Mutual eclipse/occultation events that are 0.13 magnitude deep
indicate a lower limit on the secondary-to-primary mean-diameter ratio of 0.36.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2023 CBAT
2023 November 27                 (CBET 5319)              Daniel W. E. Green