(1830) Pogson
Abstract
D. Higgins, Canberra, Australia; P. Pravec and P. Kusnirak, Ondrejov Observatory; J. Oey, Leura, N.S.W., Australia; and D. Pray, Carbuncle Hill Observatory, Greene, RI, report that photometric observations obtained during Apr. 18 to May 9 reveal that minor planet (1830) is a binary system with an orbital period of 24.240 +/- 0.005 hr. The primary shows a period of 2.5702 +/- 0.0001 hr, and it has a lightcurve amplitude of 0.12 mag. Mutual eclipse/occultation events that are 0.08- to 0.22-mag deep indicate a lower limit on the secondary-to-primary mean-diameter ratio of 0.32.
- Publication:
-
Central Bureau Electronic Telegrams
- Pub Date:
- May 2007
- Bibcode:
- 2007CBET..957....1H