{"paper":{"title":"The Excited Spin State of 1I/2017 U1 `Oumuamua","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"Barbara Handzlik, Beatrice E. A. Mueller, Harald Ebeling, Harold A. Weaver, Jacqueline V. Keane, Jan T. Kleyna, Karen J. Meech, Marco Micheli, Marc W. Buie, Michael J. S. Belton, Micha{\\l} Drahus, Olivier R. Hainaut, Piotr Guzik, Richard J. Wainscoat, Scott S. Sheppard, Sebastian Kurowski, Siyi Xu, Wac{\\l}aw Waniak","submitted_at":"2018-04-10T12:10:11Z","abstract_excerpt":"We show that `Oumuamua's excited spin could be in a high energy LAM state, which implies that its shape could be far from the highly elongated shape found in previous studies. CLEAN and ANOVA algorithms are used to analyze `Oumuamua's lightcurve using 818 observations over 29.3~days. Two fundamental periodicities are found at frequencies (2.77$\\pm$0.11) and (6.42$\\pm$0.18)~cycles/day, corresponding to (8.67$\\pm$0.34)~h and (3.74$\\pm$0.11)~h, respectively. The phased data show that the lightcurve does not repeat in a simple manner, but approximately shows a double minimum at 2.77~cycles/day and"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.03471","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}