{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:LL7MALVWP7S6VIOHSRJQ7MBDGQ","short_pith_number":"pith:LL7MALVW","canonical_record":{"source":{"id":"1311.0553","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2013-11-04T01:07:36Z","cross_cats_sorted":[],"title_canon_sha256":"a20c2c76f82a98edae8eff5bc1933d489256620d6b0c419bd1a2e0a7a2037a58","abstract_canon_sha256":"e5757121aaec0595af4846b870b6c40c2150d92134e87d2657019775bf124a67"},"schema_version":"1.0"},"canonical_sha256":"5afec02eb67fe5eaa1c794530fb023341e9d763c2e59688614aca2e461d3d662","source":{"kind":"arxiv","id":"1311.0553","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1311.0553","created_at":"2026-05-18T01:46:39Z"},{"alias_kind":"arxiv_version","alias_value":"1311.0553v1","created_at":"2026-05-18T01:46:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1311.0553","created_at":"2026-05-18T01:46:39Z"},{"alias_kind":"pith_short_12","alias_value":"LL7MALVWP7S6","created_at":"2026-05-18T12:27:51Z"},{"alias_kind":"pith_short_16","alias_value":"LL7MALVWP7S6VIOH","created_at":"2026-05-18T12:27:51Z"},{"alias_kind":"pith_short_8","alias_value":"LL7MALVW","created_at":"2026-05-18T12:27:51Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:LL7MALVWP7S6VIOHSRJQ7MBDGQ","target":"record","payload":{"canonical_record":{"source":{"id":"1311.0553","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2013-11-04T01:07:36Z","cross_cats_sorted":[],"title_canon_sha256":"a20c2c76f82a98edae8eff5bc1933d489256620d6b0c419bd1a2e0a7a2037a58","abstract_canon_sha256":"e5757121aaec0595af4846b870b6c40c2150d92134e87d2657019775bf124a67"},"schema_version":"1.0"},"canonical_sha256":"5afec02eb67fe5eaa1c794530fb023341e9d763c2e59688614aca2e461d3d662","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:46:39.595361Z","signature_b64":"I2iSmg+77u1YvSiJKX5DZBXZfzc76kRtdognvNRugH6u/xH/q+RWLfqke+A7cuAIno7bs0bXEClOlmSmbAROCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5afec02eb67fe5eaa1c794530fb023341e9d763c2e59688614aca2e461d3d662","last_reissued_at":"2026-05-18T01:46:39.594885Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:46:39.594885Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1311.0553","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":"2026-05-18T01:46:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jQZ3OcWw+ehhsj6Wc3Bwd8xHs7SLynXMQmcTqTqf3Fcy/62dOOaAImb+RBXbDVtI9x8El8j3Kz/l75+8HeciAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-12T00:37:16.406260Z"},"content_sha256":"368b0a96198ae59e788f6db0fa3c527583acd87e3985f366785a1bc4ccdd0e80","schema_version":"1.0","event_id":"sha256:368b0a96198ae59e788f6db0fa3c527583acd87e3985f366785a1bc4ccdd0e80"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:LL7MALVWP7S6VIOHSRJQ7MBDGQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The density of mid-sized Kuiper belt object 2002 UX25 and the formation of the dwarf planets","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"Michael E. Brown","submitted_at":"2013-11-04T01:07:36Z","abstract_excerpt":"The formation of the largest objects in the Kuiper belt, with measured densities of ~1.5 g cm-3 and higher, from the coagulation of small bodies, with measured densities below 1 g cm-3 is difficult to explain without invoking significant porosity in the smallest objects. If such porosity does occur, measured densities should begin to increase at the size at which significant porosity is no longer supported. Among the asteroids, this transition occurs for diameters larger than ~350 km. In the Kuiper belt, no density measurements have been made between ~350 km and ~850 km, the diameter range whe"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1311.0553","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":"2026-05-18T01:46:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"734zFz9K/rbVfa2mtTLnVwDY4dEybw/pdUcY7vMSjtho2Iwcu6uW/JeRqPqM9fgWYkR00eb9i5m6xIqEe1cFBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-12T00:37:16.406643Z"},"content_sha256":"fe0172c3a36f735e69b1c60f9f386768c5dfe2bb1c0adfd6cdf406d4666cb4e9","schema_version":"1.0","event_id":"sha256:fe0172c3a36f735e69b1c60f9f386768c5dfe2bb1c0adfd6cdf406d4666cb4e9"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/LL7MALVWP7S6VIOHSRJQ7MBDGQ/bundle.json","state_url":"https://pith.science/pith/LL7MALVWP7S6VIOHSRJQ7MBDGQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/LL7MALVWP7S6VIOHSRJQ7MBDGQ/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":"2026-06-12T00:37:16Z","links":{"resolver":"https://pith.science/pith/LL7MALVWP7S6VIOHSRJQ7MBDGQ","bundle":"https://pith.science/pith/LL7MALVWP7S6VIOHSRJQ7MBDGQ/bundle.json","state":"https://pith.science/pith/LL7MALVWP7S6VIOHSRJQ7MBDGQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/LL7MALVWP7S6VIOHSRJQ7MBDGQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:LL7MALVWP7S6VIOHSRJQ7MBDGQ","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":"e5757121aaec0595af4846b870b6c40c2150d92134e87d2657019775bf124a67","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2013-11-04T01:07:36Z","title_canon_sha256":"a20c2c76f82a98edae8eff5bc1933d489256620d6b0c419bd1a2e0a7a2037a58"},"schema_version":"1.0","source":{"id":"1311.0553","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1311.0553","created_at":"2026-05-18T01:46:39Z"},{"alias_kind":"arxiv_version","alias_value":"1311.0553v1","created_at":"2026-05-18T01:46:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1311.0553","created_at":"2026-05-18T01:46:39Z"},{"alias_kind":"pith_short_12","alias_value":"LL7MALVWP7S6","created_at":"2026-05-18T12:27:51Z"},{"alias_kind":"pith_short_16","alias_value":"LL7MALVWP7S6VIOH","created_at":"2026-05-18T12:27:51Z"},{"alias_kind":"pith_short_8","alias_value":"LL7MALVW","created_at":"2026-05-18T12:27:51Z"}],"graph_snapshots":[{"event_id":"sha256:fe0172c3a36f735e69b1c60f9f386768c5dfe2bb1c0adfd6cdf406d4666cb4e9","target":"graph","created_at":"2026-05-18T01:46:39Z","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 formation of the largest objects in the Kuiper belt, with measured densities of ~1.5 g cm-3 and higher, from the coagulation of small bodies, with measured densities below 1 g cm-3 is difficult to explain without invoking significant porosity in the smallest objects. If such porosity does occur, measured densities should begin to increase at the size at which significant porosity is no longer supported. Among the asteroids, this transition occurs for diameters larger than ~350 km. In the Kuiper belt, no density measurements have been made between ~350 km and ~850 km, the diameter range whe","authors_text":"Michael E. Brown","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2013-11-04T01:07:36Z","title":"The density of mid-sized Kuiper belt object 2002 UX25 and the formation of the dwarf planets"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1311.0553","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":"sha256:368b0a96198ae59e788f6db0fa3c527583acd87e3985f366785a1bc4ccdd0e80","target":"record","created_at":"2026-05-18T01:46:39Z","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":"e5757121aaec0595af4846b870b6c40c2150d92134e87d2657019775bf124a67","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2013-11-04T01:07:36Z","title_canon_sha256":"a20c2c76f82a98edae8eff5bc1933d489256620d6b0c419bd1a2e0a7a2037a58"},"schema_version":"1.0","source":{"id":"1311.0553","kind":"arxiv","version":1}},"canonical_sha256":"5afec02eb67fe5eaa1c794530fb023341e9d763c2e59688614aca2e461d3d662","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5afec02eb67fe5eaa1c794530fb023341e9d763c2e59688614aca2e461d3d662","first_computed_at":"2026-05-18T01:46:39.594885Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:46:39.594885Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"I2iSmg+77u1YvSiJKX5DZBXZfzc76kRtdognvNRugH6u/xH/q+RWLfqke+A7cuAIno7bs0bXEClOlmSmbAROCA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:46:39.595361Z","signed_message":"canonical_sha256_bytes"},"source_id":"1311.0553","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:368b0a96198ae59e788f6db0fa3c527583acd87e3985f366785a1bc4ccdd0e80","sha256:fe0172c3a36f735e69b1c60f9f386768c5dfe2bb1c0adfd6cdf406d4666cb4e9"],"state_sha256":"7c429460affe8c5175cfc2abeddcb848b8285805d1dd587e0647b05a833acec2"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EJJgQBGSJ7Jy45sgjqODAmhmpYxC2M5t0NiI70EKOX8WHAMaPsHRY9SIQoEvvkz8trHA+cO/vH4FlJp9cpMgBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-12T00:37:16.408855Z","bundle_sha256":"d5a5392faa563b743b9de5ea7152a3bb8bd62f880df693887c722d36e24e53a6"}}