{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2006:YFQHKAI3Z5BIBLDN26HKFHGQF2","short_pith_number":"pith:YFQHKAI3","canonical_record":{"source":{"id":"astro-ph/0609721","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2006-09-26T19:32:07Z","cross_cats_sorted":[],"title_canon_sha256":"31b65b94c0c004510e3c163bad179e44279327e66af43faf4c41cf219bcb885d","abstract_canon_sha256":"a2d3c0644f3ef8d3214dd6553391cca1ec83d42b10fcc9cdee900d473acbd5e5"},"schema_version":"1.0"},"canonical_sha256":"c16075011bcf4280ac6dd78ea29cd02ebdc66a34f8d3aa37dc9969630baecdb0","source":{"kind":"arxiv","id":"astro-ph/0609721","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0609721","created_at":"2026-05-18T04:34:19Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0609721v1","created_at":"2026-05-18T04:34:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0609721","created_at":"2026-05-18T04:34:19Z"},{"alias_kind":"pith_short_12","alias_value":"YFQHKAI3Z5BI","created_at":"2026-05-18T12:25:54Z"},{"alias_kind":"pith_short_16","alias_value":"YFQHKAI3Z5BIBLDN","created_at":"2026-05-18T12:25:54Z"},{"alias_kind":"pith_short_8","alias_value":"YFQHKAI3","created_at":"2026-05-18T12:25:54Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2006:YFQHKAI3Z5BIBLDN26HKFHGQF2","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0609721","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2006-09-26T19:32:07Z","cross_cats_sorted":[],"title_canon_sha256":"31b65b94c0c004510e3c163bad179e44279327e66af43faf4c41cf219bcb885d","abstract_canon_sha256":"a2d3c0644f3ef8d3214dd6553391cca1ec83d42b10fcc9cdee900d473acbd5e5"},"schema_version":"1.0"},"canonical_sha256":"c16075011bcf4280ac6dd78ea29cd02ebdc66a34f8d3aa37dc9969630baecdb0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:34:19.912384Z","signature_b64":"FKOy7cI9hHG0cJ6BBS77/ntO4wpmmEN+CjA4nnbXAyOM5SGKh1nP615cA3cda2p/2DIZqVLahf341yVs+wKYAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c16075011bcf4280ac6dd78ea29cd02ebdc66a34f8d3aa37dc9969630baecdb0","last_reissued_at":"2026-05-18T04:34:19.911927Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:34:19.911927Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0609721","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":"2026-05-18T04:34:19Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JggjdeT4eZZ6dcJ/sowFdEc/mwfNYiRga2wjGpka8kxFDSQqr0pEV6G0oUFbcg6X6plOltPPP/EGtoKRO/STBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T00:28:08.768333Z"},"content_sha256":"e9a35f0a59b567ca2042c4a02da0f8d20d300d4aab754394deb0c97439c4b864","schema_version":"1.0","event_id":"sha256:e9a35f0a59b567ca2042c4a02da0f8d20d300d4aab754394deb0c97439c4b864"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2006:YFQHKAI3Z5BIBLDN26HKFHGQF2","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Migration of Comets to the Terrestrial Planets","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"J.C. Mather, S.I. Ipatov","submitted_at":"2006-09-26T19:32:07Z","abstract_excerpt":"We studied the orbital evolution of Jupiter-family comets (JFCs), Halley-type comets (HTCs), and long-period comets, and probabilities of their collisions with planets. In our runs the probability of a collision of one object with the Earth could be greater than the sum of probabilities for thousands of other objects. Even without a contribution of such a few bodies, the probability of a collision of a former JFC with the Earth was greater than 4$\\cdot10^{-6}$. This probability is enough for delivery of all the water to Earth's oceans during formation of the giant planets. The ratios of probab"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0609721","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":"2026-05-18T04:34:19Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3qGOVxRqPriYVoldqlshbxR2d6gLw9v4URhbEbdq0PJ/LYfzqRJd3H92V9jxV8KVy2xnj9OfH3z4esZaTKtaDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T00:28:08.768695Z"},"content_sha256":"aca293ebb5cdb56202c7b95d5838984e702519243dae7fc176f4db683ea99d48","schema_version":"1.0","event_id":"sha256:aca293ebb5cdb56202c7b95d5838984e702519243dae7fc176f4db683ea99d48"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/YFQHKAI3Z5BIBLDN26HKFHGQF2/bundle.json","state_url":"https://pith.science/pith/YFQHKAI3Z5BIBLDN26HKFHGQF2/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/YFQHKAI3Z5BIBLDN26HKFHGQF2/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":"2026-05-27T00:28:08Z","links":{"resolver":"https://pith.science/pith/YFQHKAI3Z5BIBLDN26HKFHGQF2","bundle":"https://pith.science/pith/YFQHKAI3Z5BIBLDN26HKFHGQF2/bundle.json","state":"https://pith.science/pith/YFQHKAI3Z5BIBLDN26HKFHGQF2/state.json","well_known_bundle":"https://pith.science/.well-known/pith/YFQHKAI3Z5BIBLDN26HKFHGQF2/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2006:YFQHKAI3Z5BIBLDN26HKFHGQF2","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":"a2d3c0644f3ef8d3214dd6553391cca1ec83d42b10fcc9cdee900d473acbd5e5","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2006-09-26T19:32:07Z","title_canon_sha256":"31b65b94c0c004510e3c163bad179e44279327e66af43faf4c41cf219bcb885d"},"schema_version":"1.0","source":{"id":"astro-ph/0609721","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0609721","created_at":"2026-05-18T04:34:19Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0609721v1","created_at":"2026-05-18T04:34:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0609721","created_at":"2026-05-18T04:34:19Z"},{"alias_kind":"pith_short_12","alias_value":"YFQHKAI3Z5BI","created_at":"2026-05-18T12:25:54Z"},{"alias_kind":"pith_short_16","alias_value":"YFQHKAI3Z5BIBLDN","created_at":"2026-05-18T12:25:54Z"},{"alias_kind":"pith_short_8","alias_value":"YFQHKAI3","created_at":"2026-05-18T12:25:54Z"}],"graph_snapshots":[{"event_id":"sha256:aca293ebb5cdb56202c7b95d5838984e702519243dae7fc176f4db683ea99d48","target":"graph","created_at":"2026-05-18T04:34:19Z","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":"We studied the orbital evolution of Jupiter-family comets (JFCs), Halley-type comets (HTCs), and long-period comets, and probabilities of their collisions with planets. In our runs the probability of a collision of one object with the Earth could be greater than the sum of probabilities for thousands of other objects. Even without a contribution of such a few bodies, the probability of a collision of a former JFC with the Earth was greater than 4$\\cdot10^{-6}$. This probability is enough for delivery of all the water to Earth's oceans during formation of the giant planets. The ratios of probab","authors_text":"J.C. Mather, S.I. Ipatov","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2006-09-26T19:32:07Z","title":"Migration of Comets to the Terrestrial Planets"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0609721","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:e9a35f0a59b567ca2042c4a02da0f8d20d300d4aab754394deb0c97439c4b864","target":"record","created_at":"2026-05-18T04:34:19Z","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":"a2d3c0644f3ef8d3214dd6553391cca1ec83d42b10fcc9cdee900d473acbd5e5","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2006-09-26T19:32:07Z","title_canon_sha256":"31b65b94c0c004510e3c163bad179e44279327e66af43faf4c41cf219bcb885d"},"schema_version":"1.0","source":{"id":"astro-ph/0609721","kind":"arxiv","version":1}},"canonical_sha256":"c16075011bcf4280ac6dd78ea29cd02ebdc66a34f8d3aa37dc9969630baecdb0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c16075011bcf4280ac6dd78ea29cd02ebdc66a34f8d3aa37dc9969630baecdb0","first_computed_at":"2026-05-18T04:34:19.911927Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:34:19.911927Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"FKOy7cI9hHG0cJ6BBS77/ntO4wpmmEN+CjA4nnbXAyOM5SGKh1nP615cA3cda2p/2DIZqVLahf341yVs+wKYAA==","signature_status":"signed_v1","signed_at":"2026-05-18T04:34:19.912384Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0609721","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e9a35f0a59b567ca2042c4a02da0f8d20d300d4aab754394deb0c97439c4b864","sha256:aca293ebb5cdb56202c7b95d5838984e702519243dae7fc176f4db683ea99d48"],"state_sha256":"e059ee6da3c8258df6b6388cb94d2f370d7cd4301de41368f2f62d7bfba7e6ef"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"r0dIIuzoGvi5XSRgYxtBIG9L6AM5j3HtgEFgtlRki84j8u/9xjbfY21ab1iST9ia2UmRZ+ubJPZVL8PekV/mAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T00:28:08.770981Z","bundle_sha256":"34bc137ce02f8d18ce92b0546441e9ec2acd9d9a55eb5dc9cb5d822548a33639"}}