Electronic Telegram No. 5180
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


(5319) PETROVSKAYA
     V. Benishek, Belgrade Astronomical Observatory; P. Pravec, Ondrejov
Observatory; and R. Durkee, Shed of Science South Observatory, Pontotoc, TX,
U.S.A., report that photometric observations taken with a 0.35-m telescope at
the Sopot Observatory in Serbia and a 0.50-m telescope at the Shed of Science
South Observatory during July 2-Aug. 27 reveal that minor planet (5319) is a
binary system with an orbital period of 28.48 +/- 0.01 hr.  The primary shows
a period of 3.3604 +/- 0.0002 hr and has a lightcurve amplitude of 0.19
magnitude at solar phases 7-11 degrees, suggesting a nearly spheroidal shape.
Mutual eclipse/occultation events that are 0.07 to 0.14 magnitude deep
indicate a lower limit on the secondary-to-primary mean-diameter ratio of
0.26.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2022 CBAT
2022 October 18                  (CBET 5180)              Daniel W. E. Green