{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:EYTMHQSULWD76F5OP4EKWXZA52","short_pith_number":"pith:EYTMHQSU","canonical_record":{"source":{"id":"1510.06445","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2015-10-21T21:53:49Z","cross_cats_sorted":[],"title_canon_sha256":"1bae7d8138b08190e874d19b2389c60c2697907fd421f726b4cd0c3c8ba7a3e3","abstract_canon_sha256":"e70d986025b7b24330a9efd51eb213ed27402bf52e254687eb96ee5895a59679"},"schema_version":"1.0"},"canonical_sha256":"2626c3c2545d87ff17ae7f08ab5f20eeaa5ff3d7c3b487b6556f99b4981be1e4","source":{"kind":"arxiv","id":"1510.06445","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1510.06445","created_at":"2026-05-18T00:54:03Z"},{"alias_kind":"arxiv_version","alias_value":"1510.06445v2","created_at":"2026-05-18T00:54:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1510.06445","created_at":"2026-05-18T00:54:03Z"},{"alias_kind":"pith_short_12","alias_value":"EYTMHQSULWD7","created_at":"2026-05-18T12:29:19Z"},{"alias_kind":"pith_short_16","alias_value":"EYTMHQSULWD76F5O","created_at":"2026-05-18T12:29:19Z"},{"alias_kind":"pith_short_8","alias_value":"EYTMHQSU","created_at":"2026-05-18T12:29:19Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:EYTMHQSULWD76F5OP4EKWXZA52","target":"record","payload":{"canonical_record":{"source":{"id":"1510.06445","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2015-10-21T21:53:49Z","cross_cats_sorted":[],"title_canon_sha256":"1bae7d8138b08190e874d19b2389c60c2697907fd421f726b4cd0c3c8ba7a3e3","abstract_canon_sha256":"e70d986025b7b24330a9efd51eb213ed27402bf52e254687eb96ee5895a59679"},"schema_version":"1.0"},"canonical_sha256":"2626c3c2545d87ff17ae7f08ab5f20eeaa5ff3d7c3b487b6556f99b4981be1e4","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:54:03.716138Z","signature_b64":"2adczinR48Gw1Ey7keHQuQBXxuIKo753LDhzDxwR/Ox53ZrawlzOJ54u0cf2y8gZr+X8oiSOPbopT3RhGrTsBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2626c3c2545d87ff17ae7f08ab5f20eeaa5ff3d7c3b487b6556f99b4981be1e4","last_reissued_at":"2026-05-18T00:54:03.715673Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:54:03.715673Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1510.06445","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:54:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"83NEvDRHltRwiWjMyX6mgPrqU1tkYM35C0ZpijcgCHPEi7lrxgWD1/oa18bPbbwC0KoiwNo0jSfHnVdLxOwxDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T03:42:18.967920Z"},"content_sha256":"b8aec86dab4e262abee71026bb641856467852de2687aa7439d4fc9b8bac909d","schema_version":"1.0","event_id":"sha256:b8aec86dab4e262abee71026bb641856467852de2687aa7439d4fc9b8bac909d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:EYTMHQSULWD76F5OP4EKWXZA52","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Pairs and Groups of Genetically Related Long-Period Comets and Probable Identity of the Mysterious Lick Object of 1921","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"Rainer Kracht, Zdenek Sekanina","submitted_at":"2015-10-21T21:53:49Z","abstract_excerpt":"We present the history of investigation of the dynamical properties of pairs and groups of genetically related long-period comets (other than the Kreutz sungrazing system). Members of a comet pair or group move in nearly identical orbits and their origin as fragments of a common parent comet is unquestionable. The only variable is the time of perihelion passage, which differs from member to member considerably due primarily to an orbital-momentum increment acquired during breakup. Meter-per-second separation velocities account for gaps of years or tens of years, thanks to the orbital periods o"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1510.06445","kind":"arxiv","version":2},"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":"2026-05-18T00:54:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"dS9w1jFyot7w7D/ln6damN5cwsQ/aExfMAC7ptgH0mojxr/kvdI9shAZ1f3exT+FNTLu5JLwV/wo56hYvIo1Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T03:42:18.968659Z"},"content_sha256":"1c42f3817cd30b17b3bb423d23b1ad35e0ed014b9f5033fdc636ad6a597f3405","schema_version":"1.0","event_id":"sha256:1c42f3817cd30b17b3bb423d23b1ad35e0ed014b9f5033fdc636ad6a597f3405"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/EYTMHQSULWD76F5OP4EKWXZA52/bundle.json","state_url":"https://pith.science/pith/EYTMHQSULWD76F5OP4EKWXZA52/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/EYTMHQSULWD76F5OP4EKWXZA52/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":"2026-06-09T03:42:18Z","links":{"resolver":"https://pith.science/pith/EYTMHQSULWD76F5OP4EKWXZA52","bundle":"https://pith.science/pith/EYTMHQSULWD76F5OP4EKWXZA52/bundle.json","state":"https://pith.science/pith/EYTMHQSULWD76F5OP4EKWXZA52/state.json","well_known_bundle":"https://pith.science/.well-known/pith/EYTMHQSULWD76F5OP4EKWXZA52/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:EYTMHQSULWD76F5OP4EKWXZA52","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":"e70d986025b7b24330a9efd51eb213ed27402bf52e254687eb96ee5895a59679","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2015-10-21T21:53:49Z","title_canon_sha256":"1bae7d8138b08190e874d19b2389c60c2697907fd421f726b4cd0c3c8ba7a3e3"},"schema_version":"1.0","source":{"id":"1510.06445","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1510.06445","created_at":"2026-05-18T00:54:03Z"},{"alias_kind":"arxiv_version","alias_value":"1510.06445v2","created_at":"2026-05-18T00:54:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1510.06445","created_at":"2026-05-18T00:54:03Z"},{"alias_kind":"pith_short_12","alias_value":"EYTMHQSULWD7","created_at":"2026-05-18T12:29:19Z"},{"alias_kind":"pith_short_16","alias_value":"EYTMHQSULWD76F5O","created_at":"2026-05-18T12:29:19Z"},{"alias_kind":"pith_short_8","alias_value":"EYTMHQSU","created_at":"2026-05-18T12:29:19Z"}],"graph_snapshots":[{"event_id":"sha256:1c42f3817cd30b17b3bb423d23b1ad35e0ed014b9f5033fdc636ad6a597f3405","target":"graph","created_at":"2026-05-18T00:54:03Z","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 present the history of investigation of the dynamical properties of pairs and groups of genetically related long-period comets (other than the Kreutz sungrazing system). Members of a comet pair or group move in nearly identical orbits and their origin as fragments of a common parent comet is unquestionable. The only variable is the time of perihelion passage, which differs from member to member considerably due primarily to an orbital-momentum increment acquired during breakup. Meter-per-second separation velocities account for gaps of years or tens of years, thanks to the orbital periods o","authors_text":"Rainer Kracht, Zdenek Sekanina","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2015-10-21T21:53:49Z","title":"Pairs and Groups of Genetically Related Long-Period Comets and Probable Identity of the Mysterious Lick Object of 1921"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1510.06445","kind":"arxiv","version":2},"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:b8aec86dab4e262abee71026bb641856467852de2687aa7439d4fc9b8bac909d","target":"record","created_at":"2026-05-18T00:54:03Z","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":"e70d986025b7b24330a9efd51eb213ed27402bf52e254687eb96ee5895a59679","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2015-10-21T21:53:49Z","title_canon_sha256":"1bae7d8138b08190e874d19b2389c60c2697907fd421f726b4cd0c3c8ba7a3e3"},"schema_version":"1.0","source":{"id":"1510.06445","kind":"arxiv","version":2}},"canonical_sha256":"2626c3c2545d87ff17ae7f08ab5f20eeaa5ff3d7c3b487b6556f99b4981be1e4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2626c3c2545d87ff17ae7f08ab5f20eeaa5ff3d7c3b487b6556f99b4981be1e4","first_computed_at":"2026-05-18T00:54:03.715673Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:54:03.715673Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"2adczinR48Gw1Ey7keHQuQBXxuIKo753LDhzDxwR/Ox53ZrawlzOJ54u0cf2y8gZr+X8oiSOPbopT3RhGrTsBg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:54:03.716138Z","signed_message":"canonical_sha256_bytes"},"source_id":"1510.06445","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b8aec86dab4e262abee71026bb641856467852de2687aa7439d4fc9b8bac909d","sha256:1c42f3817cd30b17b3bb423d23b1ad35e0ed014b9f5033fdc636ad6a597f3405"],"state_sha256":"ca1ba5915bc5544023f99d7399869276be73a4ecbe893af8b57d061b8044a6c8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9iF6sWasyVeMAVtPBCkVPHD2LCgVKaM51jvSUZ/+rI1rBro2PORL9mTAXbwOUcHQKM8y23fT+MsOe7Kcgwu0Cw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-09T03:42:18.972279Z","bundle_sha256":"c0df91bf987c456ce91a77ce970a2d1b7718a3813637f43b9b576b3635ae8b25"}}