J. Pollock, Appalachian State University; P. Pravec, Ondrejov Observatory; J. Oey, Blue Mountains Observatory, Leura, NSW; and D. E. Reichart, J. B. Haislip and A. P. LaCluyze, University of North Carolina, Chapel Hill, report that photometric observations obtained during 2015 Jan. 20-24 reveal that minor planet (357439) is a binary system with an orbital period of 13.80 +/- 0.05 hr. The primary shows a period of 2.6205 +/- 0.0003 hr, and it has a lightcurve amplitude of 0.17 mag at solar phases 99-109 deg, suggesting a nearly spheroidal shape. Mutual eclipse/occultation events that are 0.05- to 0.07-magnitude deep indicate a secondary-to-primary mean-diameter ratio of 0.21 +/- 0.02.
Central Bureau Electronic Telegrams
- Pub Date:
- January 2015