{"paper":{"title":"Refinement of the convex shape model and tumbling spin state of (99942) Apophis using the 2020-2021 apparition data","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"A. Marciniak, A. P\\'al, D. B. Caton, D. E. Reichart, D.-G. Roh, D.-H. Kim, E. Gomez, E. Sonbas, F. Yoshida, H.-J. Lee, H.-K. Moon, H.-S. Yim, H. Yang, J. Chatelain, K. Kami\\'nski, M. Dr\\'o\\.zd\\.z, M.-J. Kim, M. Kaplan, M. K. Kami\\'nska, M. \\.Zejmo, N. Erasmus, O. Erece, P. Janse van Rensburg, R. Duffard, R. Lees, R. Szak\\'ats, S. Greenstreet, S. Mottola, S. Zo{\\l}a, T. A. Lister, T. Kim, W. Og{\\l}oza, Y.-J. Choi","submitted_at":"2022-04-06T01:42:21Z","abstract_excerpt":"Context. The close approach of the near-Earth asteroid (99942) Apophis to Earth in 2029 will provide a unique opportunity to examine how the physical properties of the asteroid could be changed due to the Earth's gravitational perturbation. As a result, the Republic of Korea is planning a rendezvous mission to Apophis. Aims. Our aim was to use photometric data from the apparitions in 2020-2021 to refine the shape model and spin state of Apophis. Methods. Using thirty-six 1 to 2-m class ground-based telescopes and the Transiting Exoplanet Survey Satellite, we performed a photometric observation"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2204.02540","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2204.02540/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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"}