{"id":454,"date":"2018-06-11T08:02:21","date_gmt":"2018-06-11T08:02:21","guid":{"rendered":"http:\/\/aptog.com\/?p=454"},"modified":"2018-06-11T08:02:38","modified_gmt":"2018-06-11T08:02:38","slug":"binary-asteroid-discovery-iau-announcement-3","status":"publish","type":"post","link":"https:\/\/aptog.com\/?p=454","title":{"rendered":"Binary asteroid discovery IAU announcement"},"content":{"rendered":"<p>IAU CBET n\u00ba4523<\/p>\n<p><span class=\"im\">(<span class=\"il\">15745<\/span>) YULIYA<br \/>\nA. Aznar, Observatorio Isaac Aznar, Aras de los Olmos, Spain;<br \/>\nO. Vaduvescu, Isaac Newton Group (ING) and Instituto de Astrofisica de<br \/>\n<\/span>Canarias (IAC), Spain; T. Wilson, Isaac Newton Group (ING), University<br \/>\nCollege London (UCL), U.K.; T. Zegmott, Isaac Newton Group (ING),<br \/>\nUniversity of Kent, U.K., and P. Pravec, Ondrejov Observatory, report<br \/>\nthat photometric observations taken within the European Near Earth<br \/>\nAsteroids Research (EURONEAR) program with a 1.2-m telescope at the<br \/>\n<span class=\"im\">Mercator Observatory, La Palma, Canary Island, Spain, during<br \/>\n<\/span>Apr. 26-May 6 reveal that minor planet (<span class=\"il\">15745<\/span>) is a binary system with<br \/>\nan orbital period of 15.63 +\/- 0.02 hr.\u00a0 The primary shows a period of<br \/>\n3.2486 +\/- 0.0003 hr and has a lightcurve amplitude of 0.10 mag at solar<br \/>\n<span class=\"im\">phases 35.1-35.2 degrees, suggesting a nearly spheroidal shape.\u00a0 Mutual<br \/>\n<\/span>eclipse\/occultation events that are 0.15- to 0.21-magnitude deep indicate<span class=\"im\"><br \/>\na lower limit on the secondary-to-primary mean-diameter ratio of 0.43.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>IAU CBET n\u00ba4523 (15745) YULIYA A. Aznar, Observatorio Isaac Aznar, Aras de los Olmos, Spain; O. Vaduvescu, Isaac Newton Group (ING) and Instituto de Astrofisica de Canarias (IAC), Spain; T. Wilson, Isaac Newton Group (ING), University College London (UCL), U.K.; T. Zegmott, Isaac Newton Group (ING), University of Kent, U.K., and P. Pravec, Ondrejov Observatory, [&hellip;]<\/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":[],"class_list":["post-454","post","type-post","status-publish","format-standard","hentry","category-papers-and-letters"],"acf":[],"_links":{"self":[{"href":"https:\/\/aptog.com\/index.php?rest_route=\/wp\/v2\/posts\/454","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=454"}],"version-history":[{"count":1,"href":"https:\/\/aptog.com\/index.php?rest_route=\/wp\/v2\/posts\/454\/revisions"}],"predecessor-version":[{"id":455,"href":"https:\/\/aptog.com\/index.php?rest_route=\/wp\/v2\/posts\/454\/revisions\/455"}],"wp:attachment":[{"href":"https:\/\/aptog.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=454"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/aptog.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=454"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/aptog.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=454"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}