{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:2H56CL3CEZFD3FOGMDP2VJIIOL","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"fb0220062cd1a1208058f29f7515d2db18cb9c5c741e47bdaea258ff1a350215","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2018-02-07T00:44:23Z","title_canon_sha256":"87be207e2abbba2728519eb9e4fc36c0c2a51526e7a33a9bcf31eb5b1c64ffaa"},"schema_version":"1.0","source":{"id":"1802.02273","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1802.02273","created_at":"2026-05-18T00:15:57Z"},{"alias_kind":"arxiv_version","alias_value":"1802.02273v1","created_at":"2026-05-18T00:15:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1802.02273","created_at":"2026-05-18T00:15:57Z"},{"alias_kind":"pith_short_12","alias_value":"2H56CL3CEZFD","created_at":"2026-05-18T12:32:02Z"},{"alias_kind":"pith_short_16","alias_value":"2H56CL3CEZFD3FOG","created_at":"2026-05-18T12:32:02Z"},{"alias_kind":"pith_short_8","alias_value":"2H56CL3C","created_at":"2026-05-18T12:32:02Z"}],"graph_snapshots":[{"event_id":"sha256:6cadeed24ec15c7625b0df1d74ce5849378b9b721972522501329a2ae29caec2","target":"graph","created_at":"2026-05-18T00:15:57Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"The recently discovered first interstellar object 1I/2017 U1 (`Oumuamua) has brightness that varies by a factor of 10, a range greater than that of any Solar System asteroid, a spectrum characteristic of Type D asteroids, and no evidence of evaporating volatiles, contrary to expectation for exo-Oort clouds. This object was the first example of the proposed \"Jurads\", objects depleted in volatiles and ejected from planetary systems during the post-main sequence evolution of their parent star. I suggest that heating by the star's giant stage fluidized a precursor cometary object as volatiles esca","authors_text":"J. I. Katz","cross_cats":["astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2018-02-07T00:44:23Z","title":"Why is Interstellar Object 1I/2017 U1 (`Oumuamua) Rocky, Tumbling and Very Prolate?"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1802.02273","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:256814cc5dbe4ee49eb673ce02c24802eb9523223407b63a8180f493c10cd5c3","target":"record","created_at":"2026-05-18T00:15:57Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"fb0220062cd1a1208058f29f7515d2db18cb9c5c741e47bdaea258ff1a350215","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2018-02-07T00:44:23Z","title_canon_sha256":"87be207e2abbba2728519eb9e4fc36c0c2a51526e7a33a9bcf31eb5b1c64ffaa"},"schema_version":"1.0","source":{"id":"1802.02273","kind":"arxiv","version":1}},"canonical_sha256":"d1fbe12f62264a3d95c660dfaaa50872f372ff46dee45cf7b000bafb933114d3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d1fbe12f62264a3d95c660dfaaa50872f372ff46dee45cf7b000bafb933114d3","first_computed_at":"2026-05-18T00:15:57.800531Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:15:57.800531Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"tdABOXQQXKkCrfAHd6dKDWoMywlmnYmeXVDsQQ5XLOiVPQebYrDfQdefn/kW5vfk+06Bd+h+JN+s5az39ASiCw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:15:57.801192Z","signed_message":"canonical_sha256_bytes"},"source_id":"1802.02273","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:256814cc5dbe4ee49eb673ce02c24802eb9523223407b63a8180f493c10cd5c3","sha256:6cadeed24ec15c7625b0df1d74ce5849378b9b721972522501329a2ae29caec2"],"state_sha256":"3977d433a685be8671ef1a20b1906693c429ec5fbd3cff2866ae53da5542e6be"}