Electronic Telegram No. 4033
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
CBAT Director:  Daniel W. E. Green; 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


(3841) DICICCO
     D. A. Klinglesmith, Etscorn Campus Observatory, Socorro, NM, U.S.A.; L.
Franco, Balzaretto Observatory; and P. Pravec, Ondrejov Obseratory, report
that photometric observations obtained during Nov. 21-Dec. 1 reveal that minor
planet (3841) is a binary system with an orbital period of 21.63 +/- 0.02 hr.
The primary shows a period of 3.5949 +/- 0.0002 hr, and it has a lightcurve
amplitude of 0.18 mag, suggesting a nearly spheroidal shape.  The secondary is
rotating synchronously, and its rotational component in the combined
(primary + secondary) lightcurve has an amplitude of 0.03 mag.  Mutual
eclipse/occultation events that are 0.08- to 0.15-magnitude deep indicate a
lower limit on the secondary-to-primary mean-diameter ratio of 0.28.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2014 CBAT
2014 December 8                  (CBET 4033)              Daniel W. E. Green