(2070) Humason
Abstract
V. Benishek, Belgrade Astronomical Observatory; P. Pravec, Ondrejov Observatory; F. Pilcher, Organ Mesa Observatory, Las Cruces, NM, U.S.A.; and V. Chiorny, Kharkiv Observatory, report that photometric observations obtained with a 0.35-m telescope at the Sopot Observatory in Serbia, a 0.35-m telescope at the Organ Mesa Observatory, and a 0.70-m telescope at the Chuguev station of the Kharkiv Observatory in Ukraine during 2018 Oct. 13-Nov. 2 reveal that minor planet (2070) is a binary system with an orbital period of 53.5 +/- 0.1 hr. The primary shows a period of 3.1883 +/- 0.0005 hr and has a light-curve amplitude of 0.15 mag at solar phases 1-3 degrees, suggesting a nearly spheroidal shape. Mutual eclipse/occultation events that are 0.10- to 0.15- magnitude deep indicate a secondary-to-primary mean-diameter ratio of 0.31 +/- 0.02.
- Publication:
-
Central Bureau Electronic Telegrams
- Pub Date:
- January 2019
- Bibcode:
- 2019CBET.4599....1B