{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2015:M33MVLKUK66S45GZQEFA2ZDCEN","short_pith_number":"pith:M33MVLKU","schema_version":"1.0","canonical_sha256":"66f6caad5457bd2e74d9810a0d64622379922e6c0f3a7cffec0e7eac0784703a","source":{"kind":"arxiv","id":"1502.04655","version":1},"attestation_state":"computed","paper":{"title":"The Closest Known Flyby of a Star to the Solar System","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.EP"],"primary_cat":"astro-ph.SR","authors_text":"Alexei Y. Kniazev, Eric E. Mamajek, Henri M. J. Boffin, Petri Vaisanen, Scott A. Barenfeld, Valentin D. Ivanov, Yuri Beletsky","submitted_at":"2015-02-16T18:17:52Z","abstract_excerpt":"Passing stars can perturb the Oort Cloud, triggering comet showers and potentially extinction events on Earth. We combine velocity measurements for the recently discovered, nearby, low-mass binary system WISE J072003.20-084651.2 (\"Scholz's star\") to calculate its past trajectory. Integrating the Galactic orbits of this $\\sim$0.15 M$_{\\odot}$ binary system and the Sun, we find that the binary passed within only 52$^{+23}_{-14}$ kAU (0.25$^{+0.11}_{-0.07}$ parsec) of the Sun 70$^{+15}_{-10}$ kya (1$\\sigma$ uncertainties), i.e. within the outer Oort Cloud. This is the closest known encounter of a"},"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":"1502.04655","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-02-16T18:17:52Z","cross_cats_sorted":["astro-ph.EP"],"title_canon_sha256":"0d05b4a1ac5112d36d8ed4fd373417a25ede9a6c25aa3c3aa313b43c59687a75","abstract_canon_sha256":"efd29a04145d3363f4c0b236130fa5c627056ca8c53c62cef009f4ed55db2fd5"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:26:59.412027Z","signature_b64":"pesRKSgkUJVkogwczDquBv7RpojqfL8YO3h6W2+bfDQJO6X8v8Ap+lv/gCzmcOQHKfSo6aQ290Fn9nIeAuxlBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"66f6caad5457bd2e74d9810a0d64622379922e6c0f3a7cffec0e7eac0784703a","last_reissued_at":"2026-05-18T02:26:59.411671Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:26:59.411671Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The Closest Known Flyby of a Star to the Solar System","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.EP"],"primary_cat":"astro-ph.SR","authors_text":"Alexei Y. Kniazev, Eric E. Mamajek, Henri M. J. Boffin, Petri Vaisanen, Scott A. Barenfeld, Valentin D. Ivanov, Yuri Beletsky","submitted_at":"2015-02-16T18:17:52Z","abstract_excerpt":"Passing stars can perturb the Oort Cloud, triggering comet showers and potentially extinction events on Earth. We combine velocity measurements for the recently discovered, nearby, low-mass binary system WISE J072003.20-084651.2 (\"Scholz's star\") to calculate its past trajectory. Integrating the Galactic orbits of this $\\sim$0.15 M$_{\\odot}$ binary system and the Sun, we find that the binary passed within only 52$^{+23}_{-14}$ kAU (0.25$^{+0.11}_{-0.07}$ parsec) of the Sun 70$^{+15}_{-10}$ kya (1$\\sigma$ uncertainties), i.e. within the outer Oort Cloud. This is the closest known encounter of a"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1502.04655","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1502.04655","created_at":"2026-05-18T02:26:59.411726+00:00"},{"alias_kind":"arxiv_version","alias_value":"1502.04655v1","created_at":"2026-05-18T02:26:59.411726+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1502.04655","created_at":"2026-05-18T02:26:59.411726+00:00"},{"alias_kind":"pith_short_12","alias_value":"M33MVLKUK66S","created_at":"2026-05-18T12:29:29.992203+00:00"},{"alias_kind":"pith_short_16","alias_value":"M33MVLKUK66S45GZ","created_at":"2026-05-18T12:29:29.992203+00:00"},{"alias_kind":"pith_short_8","alias_value":"M33MVLKU","created_at":"2026-05-18T12:29:29.992203+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/M33MVLKUK66S45GZQEFA2ZDCEN","json":"https://pith.science/pith/M33MVLKUK66S45GZQEFA2ZDCEN.json","graph_json":"https://pith.science/api/pith-number/M33MVLKUK66S45GZQEFA2ZDCEN/graph.json","events_json":"https://pith.science/api/pith-number/M33MVLKUK66S45GZQEFA2ZDCEN/events.json","paper":"https://pith.science/paper/M33MVLKU"},"agent_actions":{"view_html":"https://pith.science/pith/M33MVLKUK66S45GZQEFA2ZDCEN","download_json":"https://pith.science/pith/M33MVLKUK66S45GZQEFA2ZDCEN.json","view_paper":"https://pith.science/paper/M33MVLKU","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1502.04655&json=true","fetch_graph":"https://pith.science/api/pith-number/M33MVLKUK66S45GZQEFA2ZDCEN/graph.json","fetch_events":"https://pith.science/api/pith-number/M33MVLKUK66S45GZQEFA2ZDCEN/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/M33MVLKUK66S45GZQEFA2ZDCEN/action/timestamp_anchor","attest_storage":"https://pith.science/pith/M33MVLKUK66S45GZQEFA2ZDCEN/action/storage_attestation","attest_author":"https://pith.science/pith/M33MVLKUK66S45GZQEFA2ZDCEN/action/author_attestation","sign_citation":"https://pith.science/pith/M33MVLKUK66S45GZQEFA2ZDCEN/action/citation_signature","submit_replication":"https://pith.science/pith/M33MVLKUK66S45GZQEFA2ZDCEN/action/replication_record"}},"created_at":"2026-05-18T02:26:59.411726+00:00","updated_at":"2026-05-18T02:26:59.411726+00:00"}