Electronic Telegram No. 5627
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)
URL http://www.cbat.eps.harvard.edu/index.html
Prepared using the Tamkin Foundation Computer Network


(8930) KUBOTA
     R. Durkee, Shed of Science South Observatory, Pontotoc, TX, U.S.A.; P.
Pravec, Ondrejov Observatory; V. Benishek, Belgrade Astronomical Observatory;
F. Vachier, Observatoire de Paris; R. Goncalves, Linhaceira, Tomar, Portugal;
N. Ruocco, Osservatorio Astronomico Nastro Verde, Sorrento, Italy; A. Galad,
Modra Observatory; and A. Klotz, J. Berthier, and P. Thierry, Observatoire des
Makes, Reunion, report that photometric observations taken with a 0.50-m
telescope at the Shed of Science South Observatory, a 0.35-m telescope at the
Sopot Observatory in Serbia, a 0.6-m telescope at the Observatoire des Makes,
a 0.35-m telescope at Linhaceira Observatory, a 0.35-m telescope at the
Osservatorio Astronomico Nastro Verde, and a 0.60-m telescope at the Modra
Observatory during Sept. 24-Oct. 29 reveal that minor planet (8930) is a
binary system with an orbital period of 25.91 +/- 0.02 hr.  The primary shows
a period of 3.5867 +/- 0.0003 hr and has a lightcurve amplitude of 0.08
magnitude at solar phases 6-23 degrees, suggesting a nearly spheroidal shape.
Mutual eclipse/occultation events that are 0.19 magnitude deep indicate a
secondary-to-primary mean-diameter ratio of 0.44 +/- 0.02.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2025 CBAT
2025 October 30                  (CBET 5627)              Daniel W. E. Green