{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:UDPG6SYW26OVFAKQHWFGVBLOX2","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":"8f1afc85da6caf761b116c63a1b8488ce297ef7a960cd3ba20bbbbb225dd68d7","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2014-03-27T16:41:35Z","title_canon_sha256":"29b4a03daee4061dd624bd033ceacf8d631d416d16c2ed69d416900011707243"},"schema_version":"1.0","source":{"id":"1403.7128","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1403.7128","created_at":"2026-05-18T01:43:50Z"},{"alias_kind":"arxiv_version","alias_value":"1403.7128v1","created_at":"2026-05-18T01:43:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1403.7128","created_at":"2026-05-18T01:43:50Z"},{"alias_kind":"pith_short_12","alias_value":"UDPG6SYW26OV","created_at":"2026-05-18T12:28:52Z"},{"alias_kind":"pith_short_16","alias_value":"UDPG6SYW26OVFAKQ","created_at":"2026-05-18T12:28:52Z"},{"alias_kind":"pith_short_8","alias_value":"UDPG6SYW","created_at":"2026-05-18T12:28:52Z"}],"graph_snapshots":[{"event_id":"sha256:9729bdde64e2b088552ca3b472c697fd4aa028cffc8bb1f4ca75a7e4b6fc8c38","target":"graph","created_at":"2026-05-18T01:43:50Z","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 dynamically new comet, C/2013 A1 (Siding Spring), is to make a close approach to Mars on 2014 October 19 at 18:30 UT at a distance of 40+/-1 Martian radius. Such extremely rare event offers a precious opportunity for the spacecrafts on Mars to closely study a dynamically new comet itself as well as the planet-comet interaction. Meanwhile, the high speed meteoroids released from C/Siding Spring also pose a threat to physically damage the spacecrafts. Here we present our observations and modeling results of C/Siding Spring to characterize the comet and assess the risk posed to the spacecraft","authors_text":"Man-To Hui, Quan-Zhi Ye","cross_cats":["astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2014-03-27T16:41:35Z","title":"An Early Look of Comet C/2013 A1 (Siding Spring): Breathtaker or Nightmare?"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1403.7128","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:d6e499085ca6c4f0cb98d36097d50204f1866b1d824e8202533b0f86b23613a6","target":"record","created_at":"2026-05-18T01:43:50Z","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":"8f1afc85da6caf761b116c63a1b8488ce297ef7a960cd3ba20bbbbb225dd68d7","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2014-03-27T16:41:35Z","title_canon_sha256":"29b4a03daee4061dd624bd033ceacf8d631d416d16c2ed69d416900011707243"},"schema_version":"1.0","source":{"id":"1403.7128","kind":"arxiv","version":1}},"canonical_sha256":"a0de6f4b16d79d5281503d8a6a856ebea7a08f12273d8f95fb730da1d7da98f9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a0de6f4b16d79d5281503d8a6a856ebea7a08f12273d8f95fb730da1d7da98f9","first_computed_at":"2026-05-18T01:43:50.085601Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:43:50.085601Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"4uZvP1gE+de2csAyGNSt7L8UkR468gYak7C9D9n3DaoYwsWXyj+0uwtx5TjXnEUwCNRlumiIydapeb9oxsYtAA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:43:50.086191Z","signed_message":"canonical_sha256_bytes"},"source_id":"1403.7128","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d6e499085ca6c4f0cb98d36097d50204f1866b1d824e8202533b0f86b23613a6","sha256:9729bdde64e2b088552ca3b472c697fd4aa028cffc8bb1f4ca75a7e4b6fc8c38"],"state_sha256":"10994e145fa51d7cee0ff5e69ef305a6852ccef35ea5201324ec5d267884edba"}