Electronic Telegram No. 5373
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


(1879) BROEDERSTROOM
     V. Benishek, Belgrade Astronomical Observatory; P. Pravec, Ondrejov
Observatory; A. Marchini and R. Papini, Dipartimento di Scienze Fisiche, Della
Terra e Dell'Ambiente, University of Siena; F. Pilcher, Organ Mesa
Observatory, Las Cruces, NM, USA; N. Ruocco, Osservatorio Astronomico Nastro
Verde, Sorento, Italy; and R. Durkee, Shed of Science South Observatory,
Pontotoc, TX, USA, report that photometric observations taken with a 0.35-m
telescope at the Sopot Observatory in Serbia, a 0.30-m telescope at the
Astronomical Observatory of the University of Siena, a 0.35-m telescope at
the Organ Mesa Observatory, a 0.35-m telescope at the Nastro Verde
Observatory, and a 0.50-m telescope at the Shed of Science South Observatory
during Jan. 22-Mar. 3 reveal that minor planet (1879) is a binary system with
an orbital period of 47.83 +/- 0.02 hr.  The primary shows a period of
3.01543 +/- 0.00008 hr and has a light-curve amplitude of 0.16 magnitude at
solar phases 1-5 degrees, suggesting a nearly spheroidal shape.  Mutual
eclipse/occultation events that are 0.12 magnitude deep indicate a
secondary-to-primary mean-diameter ratio of 0.34 +/- 0.02.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2024 CBAT
2024 March 26                    (CBET 5373)              Daniel W. E. Green