CBET 4243 on 2242 Balaton

(2242) BALATON

 

A. Marchini, F. Salvaggio, and R. Papini, Astronomical Observatory, Dipartimento di Scienze Fisiche della Terra e dell’Ambiente, University of Siena; P. Pravec, Ondrejov Observatory; D. Klinglesmith, Magdalena Ridge Observatory; D. Pray, Sugarloaf Mountain Observatory, South Deerfield, MA, U.S.A.; P. Bacci, Astronomical Observatory of San Marcello Pistoiese, Italy; L. Franco, Balzaretto Observatory, Rome, Italy; and A. Carbognani, the Etscorn Campus Observatory (Socorro, NM, U.S.A.), a 0.50-m telescope at Astronomical Observatory of the Aosta Valley Autonomous Region, Italy, report that photometric observations taken with a 0.30-m telescope at the Astronomical Observatory of the University of Siena, a 0.36-m telescope at The primary shows a period of 2.79792 +/- 0.00009 hr and has a lightcurve the Sugarloaf Mountain Observatory, and a 0.60-m telescope at the San Marcello Pistoiese Observatory during 2015 Dec. 27-2016 Jan. 16 reveal that minor planet (2242) is a binary system with an orbital period of 12.96 +/- 0.01 hr. mean-diameter ratio of 0.25. amplitude of 0.18 mag at solar phases 5-16 degrees, suggesting a nearly spheroidal shape. Mutual eclipse/occultation events that are 0.03- to 0.08-magnitude deep indicate a lower limit on the secondary-to-primary.