(1480) AUNUS
V. Benishek, Belgrade Astronomical Observatory; P. Pravec, Ondrejov
Observatory; J. Oey, Blue Mountains Observatory, Leura, NSW, Australia;
R. Durkee, Shed of Science South Observatory, Pontotoc, TX, U.S.A.; C. Odden,
Phillips Academy, Andover, MA, U.S.A.; W. Cooney, Starry Night Observatory,
Columbus, TX, U.S.A.; J. Kemp, Middlebury College, Middlebury, VT, U.S.A.;
D. Pray, Sugarloaf Mountain Observatory, South Deerfield, MA, U.S.A.; J.
Gross and D. Terrell, Sonoita Research Observatory, Sonoita, AZ, U.S.A.; and
A. Aznar, Isaac Aznar Observatory, Alcublas, Valencia, Spain, report that
photometric observations taken with a 0.35-m telescope at the Sopot
Observatory in Serbia, a 0.35-m telescope at the Blue Mountains Observatory,
a 0.50-m telescope at the Shed of Science South Observatory, a 0.50-m
telescope at the Phillips Academy Observatory, a 0.50-m telescope at the
Starry Night Observatory, a 0.50-m telescope at the Mittelman Observatories
at New Mexico Skies, a 0.50-m telescope at the Sugarloaf Mountain
Observatory, a 0.50-m telescope at the Sonoita Research Observatory, and a
0.35-m telescope at the Isaac Aznar Observatory during Mar. 21-May 19 reveal
that minor planet (1480) is a binary system with an orbital period of 19.714
± 0.003 hr. The primary shows a period of 5.1600 ± 0.0002 hr and has a
lightcurve amplitude of 0.16 magnitude at solar phases 2-18 degrees,
suggesting a nearly spheroidal shape. Mutual eclipse/occultation events that
are 0.09 to 0.20 magnitude deep indicate a lower limit on the secondary-to-
primary mean-diameter ratio of 0.30.