(18303) 1980 PU
\nV. Benishek, Belgrade Astronomical Observatory; P. Pravec and P.
\nKusnirak, Ondrejov Observatory; R. Durkee, Shed of Science South Observatory,
\nPontotoc, TX, U.S.A.; D. Pray, Sugarloaf Mountain Observatory, South
\nDeerfield, MA, U.S.A.; V. Chiorny and O. Mikhalchenko, Kharkiv Observatory;
\nM. Husarik and M. Pikler, Skalnate Pleso Observatory; J. Oey, Blue Mountains
\nObservatory, Leura, NSW, Australia; P. Bacci and M. Maestripieri,
\nAstronomical Observatory, San Marcello Pistoiese, Italy; and A. Aznar, Isaac
\nAznar Observatory, Alcublas, Valencia, Spain, report that photometric
\nobservations taken with a 0.35-m telescope at the Sopot Observatory in
\nSerbia, a 0.50-m telescope at the Shed of Science South Observatory, a
\n0.50-m telescope at the Sugarloaf Mountain Observatory, a 0.70-m telescope
\nat the Chuguev station of the Kharkiv Observatory in Ukraine, a 0.61-m
\ntelescope at the Skalnate Pleso Observatory, a 0.35-m telescope at the Blue
\nMountains Observatory, a 0.60-m telescope at the San Marcello Pistoiese
\nObservatory, and a 0.35-m telescope at the Isaac Aznar Observatory during
\nAug. 10-Oct. 2 reveal that minor planet (18303) is a binary system with an
\norbital period of 12.270 \u00c2\u00b1 0.003 hr. The primary shows a period of
\n2.72627 \u00c2\u00b1 0.00010 hr and has a lightcurve amplitude of 0.10 magnitude at
\nsolar phases 4-14 degrees, suggesting a nearly spheroidal shape. Mutual
\neclipse\/occultation events that are 0.05 to 0.12 magnitude deep indicate
\na secondary-to-primary mean-diameter ratio of 0.24 \u00c2\u00b1 0.03.<\/p>\n
2019 October 9 (CBET\u00a04676) Daniel W. E. Green\u00bb [2019-10-10 07:45, Ondrejov]<\/p>\n","protected":false},"excerpt":{"rendered":"
(18303) 1980 PU V. Benishek, Belgrade Astronomical Observatory; P. Pravec and P. Kusnirak, Ondrejov Observatory; R. Durkee, Shed of Science South Observatory, Pontotoc, TX, U.S.A.; D. Pray, Sugarloaf Mountain Observatory, South Deerfield, MA, U.S.A.; V. Chiorny and O. Mikhalchenko, Kharkiv Observatory; M. Husarik and M. Pikler, Skalnate Pleso Observatory; J. Oey, Blue Mountains Observatory, Leura, […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[7],"tags":[80,81,23,82],"class_list":["post-852","post","type-post","status-publish","format-standard","hentry","category-papers-and-letters","tag-80","tag-announcement","tag-binary-asteroid","tag-cbet"],"acf":[],"_links":{"self":[{"href":"https:\/\/aptog.com\/index.php?rest_route=\/wp\/v2\/posts\/852","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/aptog.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/aptog.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/aptog.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/aptog.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=852"}],"version-history":[{"count":2,"href":"https:\/\/aptog.com\/index.php?rest_route=\/wp\/v2\/posts\/852\/revisions"}],"predecessor-version":[{"id":854,"href":"https:\/\/aptog.com\/index.php?rest_route=\/wp\/v2\/posts\/852\/revisions\/854"}],"wp:attachment":[{"href":"https:\/\/aptog.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=852"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/aptog.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=852"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/aptog.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=852"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}