{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:7SLJ23KXUQIQPNVHFKQRKHRSQP","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":"ba5adef5443ea5469812c4c8ae99d9af68db69bbd821c2428ae11c2b3d34a1ec","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2016-03-20T14:54:02Z","title_canon_sha256":"9cad39d7c0ecef6c0199933691ba57e1e4d2aee362d024cf82ad26df149cd71c"},"schema_version":"1.0","source":{"id":"1603.06224","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1603.06224","created_at":"2026-05-18T01:15:34Z"},{"alias_kind":"arxiv_version","alias_value":"1603.06224v2","created_at":"2026-05-18T01:15:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1603.06224","created_at":"2026-05-18T01:15:34Z"},{"alias_kind":"pith_short_12","alias_value":"7SLJ23KXUQIQ","created_at":"2026-05-18T12:30:04Z"},{"alias_kind":"pith_short_16","alias_value":"7SLJ23KXUQIQPNVH","created_at":"2026-05-18T12:30:04Z"},{"alias_kind":"pith_short_8","alias_value":"7SLJ23KX","created_at":"2026-05-18T12:30:04Z"}],"graph_snapshots":[{"event_id":"sha256:6fd9b198874498d88f5c554465e2bf794af1925b9197936a8b816ea15f432942","target":"graph","created_at":"2026-05-18T01:15:34Z","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":"Kuiper Belt objects with absolute magnitude less than 3 (radius $\\gtrsim$500 km), the dwarf planets, have a range of different ice/rock ratios, and are more rock-rich than their smaller counterparts. Many of these objects have moons, which suggests that collisions may have played a role in modifying their compositions. We show that the dwarf planets fall into two categories when analysed by their mean densities and satellite-to-primary size ratio. Systems with large moons, such as Pluto/Charon and Orcus/Vanth, can form in low-velocity grazing collisions in which both bodies retain their compos","authors_text":"Amy C. Barr, Megan E. Schwamb","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2016-03-20T14:54:02Z","title":"Interpreting the Densities of the Kuiper Belt's Dwarf Planets"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1603.06224","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":"sha256:70529797757dcececc7b07dafa970f253bc8723dada4c1813e6dad1074860c0d","target":"record","created_at":"2026-05-18T01:15:34Z","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":"ba5adef5443ea5469812c4c8ae99d9af68db69bbd821c2428ae11c2b3d34a1ec","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2016-03-20T14:54:02Z","title_canon_sha256":"9cad39d7c0ecef6c0199933691ba57e1e4d2aee362d024cf82ad26df149cd71c"},"schema_version":"1.0","source":{"id":"1603.06224","kind":"arxiv","version":2}},"canonical_sha256":"fc969d6d57a41107b6a72aa1151e3283c687c21a48ce369b1999aec8783252ae","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fc969d6d57a41107b6a72aa1151e3283c687c21a48ce369b1999aec8783252ae","first_computed_at":"2026-05-18T01:15:34.007141Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:15:34.007141Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"HJmMqenYEshZuREWf38cNextgiMaq3YFtseP1bjseOPu3CWe5qCwP/NHY/iBPltwnBgnpht2x/+vqbaWIJgRCg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:15:34.007784Z","signed_message":"canonical_sha256_bytes"},"source_id":"1603.06224","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:70529797757dcececc7b07dafa970f253bc8723dada4c1813e6dad1074860c0d","sha256:6fd9b198874498d88f5c554465e2bf794af1925b9197936a8b816ea15f432942"],"state_sha256":"6a60f5e081098dc51a6897f53693b0e0fb5de471713198d75898291905de9e2d"}