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Merline","submitted_at":"2010-05-28T18:25:34Z","abstract_excerpt":"Aims. We determine the physical properties (spin state and shape) of asteroid (21) Lutetia, target of the ESA Rosetta mission, to help in preparing for observations during the flyby on 2010 July 10 by predicting the orientation of Lutetia as seen from Rosetta.\n  Methods. We use our novel KOALA inversion algorithm to determine the physical properties of asteroids from a combination of optical lightcurves, disk-resolved images, and stellar occultations, although the latter are not available for (21) Lutetia.\n  Results. We find the spin axis of (21) Lutetia to lie within 5 degrees of ({\\lambda} ="},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1005.5356","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2010-05-28T18:25:34Z","cross_cats_sorted":[],"title_canon_sha256":"ae635b3cfd9b7b373a24f07bcccd658fd979d4703262c48ad0fb33b378ca26fc","abstract_canon_sha256":"6b87d6b688a0bec7f80649a76e867853a758b3057368f635a1dc944c333556bf"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:07:06.755597Z","signature_b64":"dwL7Tx2MFcaPeUk6z0NvPp2qKjdAnvKeAvoPY9JF6By1JAkIpJsnOQHfSAIrCdbJJo1u719Q2Abqru0VAvHKDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e17fb8cf1e7d373c59397befc4b17cc0a77810ea5f80c61fc44f5add5a5c929b","last_reissued_at":"2026-05-18T02:07:06.755100Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:07:06.755100Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Physical properties of ESA Rosetta target asteroid (21) Lutetia: Shape and flyby geometry","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"A. Conrad, A. Kryszczynska, B. Carry, C. Dumas, C. Leyrat, C. R. Chapman, D. Perna, E. Dotto, F. Colas, F. Vachier, H. A. Weaver, J. C. Christou, J. D. Drummond, L. Bernasconi, M. Fulchignoni, M. Kaasalainen, M. Polinska, P. M. Tamblyn, P. Wiggins, R. Behrend, R. Naves, R. Poncy, R. Roy, S. Fornasier, W. J. Merline","submitted_at":"2010-05-28T18:25:34Z","abstract_excerpt":"Aims. We determine the physical properties (spin state and shape) of asteroid (21) Lutetia, target of the ESA Rosetta mission, to help in preparing for observations during the flyby on 2010 July 10 by predicting the orientation of Lutetia as seen from Rosetta.\n  Methods. We use our novel KOALA inversion algorithm to determine the physical properties of asteroids from a combination of optical lightcurves, disk-resolved images, and stellar occultations, although the latter are not available for (21) Lutetia.\n  Results. 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