Electronic Telegram No. 5044 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 (17081) JAYTEE F. Vachier, Observatoire de Paris; P. Pravec and P. Kusnirak, Ondrejov Observatory; V. Chiorny, Kharkiv Observatory; J. Oey, Blue Mountains Observatory, Leura, NSW, Australia; R. Durkee, Shed of Science South Observatory, Pontotoc, TX, U.S.A.; V. Benishek, Belgrade Astronomical Observatory; and P. Thierry, A. Klotz, and J. Berthier, Observatoire des Makes, Reunion, report that photometric observations taken with a 0.6-m telescope at the Observatoire des Makes, a 0.70-m telescope at the Chuguev station of the Kharkiv Observatory in Ukraine, a 0.35-m telescope at the Blue Mountains Observatory, a 0.50-m telescope at the Shed of Science South Observatory, and a 0.35-m telescope at the Sopot Observatory in Serbia during July 30-Sept. 11 reveal that minor planet (17081) is a binary system with an orbital period of 16.342 +/- 0.010 hr. The primary shows a period of 2.8818 +/- 0.0002 hr and has a lightcurve amplitude of 0.17 mag at solar phases 3-8 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 NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars.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 2021 CBAT 2021 September 25 (CBET 5044) Daniel W. E. Green