CBET 4689 on (2019) VanAlbada

V. Benishek, Belgrade Astronomical Observatory; P. Pravec, Ondrejov Observatory; R. Durkee, Shed of Science South Observatory, Pontotoc, TX, U.S.A.; M. Husarik, M. Pikler, G, Cervak, and D. Tomko, Skalnate Pleso Observatory; B. Christmann, Soucieu-en-Jarrest, France; A. Aznar, Isaac Aznar Observatory, Alcublas, Valencia, Spain; D. Pray, Sugarloaf Mountain Observatory, South Deerfield, MA, U.S.A.; F. Pilcher, Organ Mesa Observatory, Las Cruces, NM, U.S.A.; V. Chiorny, Kharkiv Observatory; and A. Marchini, R. Papini, and F. Salvaggio, Dipartimento di Scienze Fisiche, Della Terra e Dell’Ambiente, University of Siena, report that photometric observations taken with a 0.35-m telescope at the Sopot Observatory in Serbia, a 0.50-m telescope at the Shed of Science South Observatory, a 0.61-m telescope at the Skalnate Pleso Observatory, 0.28-m telescope at Soucieu-en-Jarrest, a 0.35-m telescope at the Isaac Aznar Observatory, a 0.50-m telescope at the Sugarloaf Mountain Observatory, a 0.35-m telescope at the Organ Mesa Observatory, a 0.70-m telescope at the Chuguev station of the Kharkiv Observatory in Ukraine, and a 0.30-m telescope at the Astronomical Observatory of the University of Siena during Sept. 22-Oct. 26 reveal that minor planet (2019) is a binary system with an orbital period of 17.982 +/- 0.003 hr. The primary shows a period of 2.7294 +/- 0.0005 hr and has a lightcurve amplitude of 0.16 magnitude at solar phases 2-3 degrees. Mutual eclipse/occultation events that are 0.07 to 0.12 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NOTE: These ‘Central Bureau Electronic Telegrams’ are sometimes superseded by text appearing later in the printed IAU Circulars.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 2019 CBAT
2019 October 30                  (CBET 4689)              Daniel W. E. Green

Pubblicato in Asteroids.

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