{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:JUG3DIRJQY3ZJNWC2QLIPASBVE","short_pith_number":"pith:JUG3DIRJ","canonical_record":{"source":{"id":"1404.4640","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2014-04-17T20:10:15Z","cross_cats_sorted":[],"title_canon_sha256":"5b0e46d03e0f27415454b2fb5aad881587f15c71c74aeb16a78fc996ff74b991","abstract_canon_sha256":"fda041ea4ebc09fdf0bb5591cc01a1d148eb3befbd397027247e82079a57694e"},"schema_version":"1.0"},"canonical_sha256":"4d0db1a229863794b6c2d416878241a9268e0b6d3051f343129704685f421a2a","source":{"kind":"arxiv","id":"1404.4640","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1404.4640","created_at":"2026-05-18T01:43:28Z"},{"alias_kind":"arxiv_version","alias_value":"1404.4640v1","created_at":"2026-05-18T01:43:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1404.4640","created_at":"2026-05-18T01:43:28Z"},{"alias_kind":"pith_short_12","alias_value":"JUG3DIRJQY3Z","created_at":"2026-05-18T12:28:35Z"},{"alias_kind":"pith_short_16","alias_value":"JUG3DIRJQY3ZJNWC","created_at":"2026-05-18T12:28:35Z"},{"alias_kind":"pith_short_8","alias_value":"JUG3DIRJ","created_at":"2026-05-18T12:28:35Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:JUG3DIRJQY3ZJNWC2QLIPASBVE","target":"record","payload":{"canonical_record":{"source":{"id":"1404.4640","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2014-04-17T20:10:15Z","cross_cats_sorted":[],"title_canon_sha256":"5b0e46d03e0f27415454b2fb5aad881587f15c71c74aeb16a78fc996ff74b991","abstract_canon_sha256":"fda041ea4ebc09fdf0bb5591cc01a1d148eb3befbd397027247e82079a57694e"},"schema_version":"1.0"},"canonical_sha256":"4d0db1a229863794b6c2d416878241a9268e0b6d3051f343129704685f421a2a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:43:28.739618Z","signature_b64":"So8sW3YZahYtcyWZddhOt/u67CQ+NsBR1Shj6Ysci/xoLrjyt2/JtcG9RT4PzAizsE0It+P3alPrCs4YssfzCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4d0db1a229863794b6c2d416878241a9268e0b6d3051f343129704685f421a2a","last_reissued_at":"2026-05-18T01:43:28.738990Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:43:28.738990Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1404.4640","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:43:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"c8mLxpIht+iM0eY2z+P2XktaMKkNiYZwuAZVZNoJDCNGjVesQLFnqOCVe/ztt0cvbejJzHXHfnZKlCC8O+/bAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T19:54:37.927416Z"},"content_sha256":"d8b056a316417c13dd6ad108c1842c872a75da72bd30b9ac59d449035da86b15","schema_version":"1.0","event_id":"sha256:d8b056a316417c13dd6ad108c1842c872a75da72bd30b9ac59d449035da86b15"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:JUG3DIRJQY3ZJNWC2QLIPASBVE","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Trajectory analysis for the nucleus and dust of comet C/2013~A1 (Siding Spring)","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"Davide Farnocchia, Michael S. P. Kelley, Pasquale Tricarico, Paul W. Chodas, Steven R. Chesley, Tony L. Farnham","submitted_at":"2014-04-17T20:10:15Z","abstract_excerpt":"Comet C/2013 A1 (siding Spring) will experience a high velocity encounter with Mars on October 19, 2014 at a distance of 135,000 km +- 5000 km from the planet center. We present a comprehensive analysis of the trajectory of both the comet nucleus and the dust tail. The nucleus of C/2013 A1 cannot impact on Mars even in the case of unexpectedly large nongravitational perturbations. Furthermore, we compute the required ejection velocities for the dust grains of the tail to reach Mars as a function of particle radius and density and heliocentric distance of the ejection. A comparison between our "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1404.4640","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:43:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"IdNtQZeZKGic3MUBvyVOujawNAK4Tb22iWEOW1xHiRIJRX513p2ZEr6QjMB96udQ+vfn7dxz6LqzixnYmH3ECg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T19:54:37.927770Z"},"content_sha256":"7a6d5c6e0b3ef4c5737c85c1f9ac9842dce9f48e4007694dd53756528379dbf4","schema_version":"1.0","event_id":"sha256:7a6d5c6e0b3ef4c5737c85c1f9ac9842dce9f48e4007694dd53756528379dbf4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JUG3DIRJQY3ZJNWC2QLIPASBVE/bundle.json","state_url":"https://pith.science/pith/JUG3DIRJQY3ZJNWC2QLIPASBVE/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JUG3DIRJQY3ZJNWC2QLIPASBVE/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-04T19:54:37Z","links":{"resolver":"https://pith.science/pith/JUG3DIRJQY3ZJNWC2QLIPASBVE","bundle":"https://pith.science/pith/JUG3DIRJQY3ZJNWC2QLIPASBVE/bundle.json","state":"https://pith.science/pith/JUG3DIRJQY3ZJNWC2QLIPASBVE/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JUG3DIRJQY3ZJNWC2QLIPASBVE/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:JUG3DIRJQY3ZJNWC2QLIPASBVE","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":"fda041ea4ebc09fdf0bb5591cc01a1d148eb3befbd397027247e82079a57694e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2014-04-17T20:10:15Z","title_canon_sha256":"5b0e46d03e0f27415454b2fb5aad881587f15c71c74aeb16a78fc996ff74b991"},"schema_version":"1.0","source":{"id":"1404.4640","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1404.4640","created_at":"2026-05-18T01:43:28Z"},{"alias_kind":"arxiv_version","alias_value":"1404.4640v1","created_at":"2026-05-18T01:43:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1404.4640","created_at":"2026-05-18T01:43:28Z"},{"alias_kind":"pith_short_12","alias_value":"JUG3DIRJQY3Z","created_at":"2026-05-18T12:28:35Z"},{"alias_kind":"pith_short_16","alias_value":"JUG3DIRJQY3ZJNWC","created_at":"2026-05-18T12:28:35Z"},{"alias_kind":"pith_short_8","alias_value":"JUG3DIRJ","created_at":"2026-05-18T12:28:35Z"}],"graph_snapshots":[{"event_id":"sha256:7a6d5c6e0b3ef4c5737c85c1f9ac9842dce9f48e4007694dd53756528379dbf4","target":"graph","created_at":"2026-05-18T01:43:28Z","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":"Comet C/2013 A1 (siding Spring) will experience a high velocity encounter with Mars on October 19, 2014 at a distance of 135,000 km +- 5000 km from the planet center. We present a comprehensive analysis of the trajectory of both the comet nucleus and the dust tail. The nucleus of C/2013 A1 cannot impact on Mars even in the case of unexpectedly large nongravitational perturbations. Furthermore, we compute the required ejection velocities for the dust grains of the tail to reach Mars as a function of particle radius and density and heliocentric distance of the ejection. A comparison between our ","authors_text":"Davide Farnocchia, Michael S. P. Kelley, Pasquale Tricarico, Paul W. Chodas, Steven R. Chesley, Tony L. Farnham","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2014-04-17T20:10:15Z","title":"Trajectory analysis for the nucleus and dust of comet C/2013~A1 (Siding Spring)"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1404.4640","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:d8b056a316417c13dd6ad108c1842c872a75da72bd30b9ac59d449035da86b15","target":"record","created_at":"2026-05-18T01:43:28Z","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":"fda041ea4ebc09fdf0bb5591cc01a1d148eb3befbd397027247e82079a57694e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2014-04-17T20:10:15Z","title_canon_sha256":"5b0e46d03e0f27415454b2fb5aad881587f15c71c74aeb16a78fc996ff74b991"},"schema_version":"1.0","source":{"id":"1404.4640","kind":"arxiv","version":1}},"canonical_sha256":"4d0db1a229863794b6c2d416878241a9268e0b6d3051f343129704685f421a2a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4d0db1a229863794b6c2d416878241a9268e0b6d3051f343129704685f421a2a","first_computed_at":"2026-05-18T01:43:28.738990Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:43:28.738990Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"So8sW3YZahYtcyWZddhOt/u67CQ+NsBR1Shj6Ysci/xoLrjyt2/JtcG9RT4PzAizsE0It+P3alPrCs4YssfzCA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:43:28.739618Z","signed_message":"canonical_sha256_bytes"},"source_id":"1404.4640","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d8b056a316417c13dd6ad108c1842c872a75da72bd30b9ac59d449035da86b15","sha256:7a6d5c6e0b3ef4c5737c85c1f9ac9842dce9f48e4007694dd53756528379dbf4"],"state_sha256":"c641d7bf5d32fddb7ead6a3670c71a22f83bec225504b780f327ba686901a728"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KYa5Oj+MASMROzspLkwZGgnMrH0XPmAnIph+u4h8DAbxq5CjkulIRdLxNnmquqLXsTLi9XT1lJF9fjtNoICyCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-04T19:54:37.929784Z","bundle_sha256":"1fc5c17d7892de6f6e758aab80bda954344e69cd13cee3cfe18352662c70e433"}}