{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:IKYMK57DEIMAD4PU2RP6L3DUVM","short_pith_number":"pith:IKYMK57D","canonical_record":{"source":{"id":"2605.20498","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2026-05-19T21:06:11Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"4a7835cc2833843bef958d8c2890cf24416c47dcbebc78f51880ce60ffe1f171","abstract_canon_sha256":"ef70ffae80157febec890ad838f50eba59badaf9fb56b873ef84d5170db98767"},"schema_version":"1.0"},"canonical_sha256":"42b0c577e3221801f1f4d45fe5ec74ab28bf466a45b23cf69a944ca330325054","source":{"kind":"arxiv","id":"2605.20498","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2605.20498","created_at":"2026-05-21T01:04:39Z"},{"alias_kind":"arxiv_version","alias_value":"2605.20498v1","created_at":"2026-05-21T01:04:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2605.20498","created_at":"2026-05-21T01:04:39Z"},{"alias_kind":"pith_short_12","alias_value":"IKYMK57DEIMA","created_at":"2026-05-21T01:04:39Z"},{"alias_kind":"pith_short_16","alias_value":"IKYMK57DEIMAD4PU","created_at":"2026-05-21T01:04:39Z"},{"alias_kind":"pith_short_8","alias_value":"IKYMK57D","created_at":"2026-05-21T01:04:39Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:IKYMK57DEIMAD4PU2RP6L3DUVM","target":"record","payload":{"canonical_record":{"source":{"id":"2605.20498","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2026-05-19T21:06:11Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"4a7835cc2833843bef958d8c2890cf24416c47dcbebc78f51880ce60ffe1f171","abstract_canon_sha256":"ef70ffae80157febec890ad838f50eba59badaf9fb56b873ef84d5170db98767"},"schema_version":"1.0"},"canonical_sha256":"42b0c577e3221801f1f4d45fe5ec74ab28bf466a45b23cf69a944ca330325054","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-21T01:04:39.917863Z","signature_b64":"0Rax/9OIv1y3qY5/gP9CBgIbZu+uzKwjSenJe2PmBHZouflQVaSlL2B3Oi8SEAsiHxw9GsEmcf1qOHgEF6iZCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"42b0c577e3221801f1f4d45fe5ec74ab28bf466a45b23cf69a944ca330325054","last_reissued_at":"2026-05-21T01:04:39.917321Z","signature_status":"signed_v1","first_computed_at":"2026-05-21T01:04:39.917321Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2605.20498","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":"2026-05-21T01:04:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"iRSoXGGiaMXweG9Jnno6dCw1/Sw7PFLaR54hoGZaNQsgAZjTA65auQ1o5qrTYRMKh3nCkxSm3Hrolp+Gl2JoDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-22T05:31:07.642525Z"},"content_sha256":"fc53ef7a4628fc5091331afce6f4acf27ff2b200a574402ff9d318d6aaff5a04","schema_version":"1.0","event_id":"sha256:fc53ef7a4628fc5091331afce6f4acf27ff2b200a574402ff9d318d6aaff5a04"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:IKYMK57DEIMAD4PU2RP6L3DUVM","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"JWST Observations of Asteroid 2024 YR4 Rule Out a 2032 Lunar Impact and Demonstrate a New Regime for Planetary Defense Follow-up","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.IM"],"primary_cat":"astro-ph.EP","authors_text":"Andrew S. Rivkin, Artem Y. Burdanov, Bryan Holler, Cristina A. Thomas, Davide Farnocchia, David J. Tholen, Dawn Graninger, Heidi B. Hammel, Isaac S. Narrett, Julien de Wit, Marco Micheli, Maxime Devogele, Petr Pravec, Stefanie N. Milam, Thomas Mueller","submitted_at":"2026-05-19T21:06:11Z","abstract_excerpt":"At the end of its discovery apparition, the $\\sim$60 m near-Earth object 2024 YR4 was associated with a non-zero probability of lunar impact during its 2032 December 22 close approach. While posing no threat to Earth, a lunar impact of this scale could have consequences for Earth-orbiting infrastructure, as well as for human exploration on and around the Moon. We present new JWST/NIRCam observations from 2026 February 18 and 26 that extend the observational arc by eight months, reduce the uncertainty in the 2032 lunar encounter by a factor $>$30, and constitute the faintest detection of a near"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2605.20498","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2605.20498/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-05-21T01:04:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uLWMJmY3JVqEH7Ak1Nx9DrlHZ+9fTI29TcWTkvNIzFkUc87QeRvb1WAaWIbB5D3x7oqpLtGWXOMUcsG54V8HBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-22T05:31:07.643004Z"},"content_sha256":"000f25d536e33c87eded7ab616a10320d85d6dda230202cfdf2793ed009473a8","schema_version":"1.0","event_id":"sha256:000f25d536e33c87eded7ab616a10320d85d6dda230202cfdf2793ed009473a8"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/IKYMK57DEIMAD4PU2RP6L3DUVM/bundle.json","state_url":"https://pith.science/pith/IKYMK57DEIMAD4PU2RP6L3DUVM/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/IKYMK57DEIMAD4PU2RP6L3DUVM/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":"2026-05-22T05:31:07Z","links":{"resolver":"https://pith.science/pith/IKYMK57DEIMAD4PU2RP6L3DUVM","bundle":"https://pith.science/pith/IKYMK57DEIMAD4PU2RP6L3DUVM/bundle.json","state":"https://pith.science/pith/IKYMK57DEIMAD4PU2RP6L3DUVM/state.json","well_known_bundle":"https://pith.science/.well-known/pith/IKYMK57DEIMAD4PU2RP6L3DUVM/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:IKYMK57DEIMAD4PU2RP6L3DUVM","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":"ef70ffae80157febec890ad838f50eba59badaf9fb56b873ef84d5170db98767","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2026-05-19T21:06:11Z","title_canon_sha256":"4a7835cc2833843bef958d8c2890cf24416c47dcbebc78f51880ce60ffe1f171"},"schema_version":"1.0","source":{"id":"2605.20498","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2605.20498","created_at":"2026-05-21T01:04:39Z"},{"alias_kind":"arxiv_version","alias_value":"2605.20498v1","created_at":"2026-05-21T01:04:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2605.20498","created_at":"2026-05-21T01:04:39Z"},{"alias_kind":"pith_short_12","alias_value":"IKYMK57DEIMA","created_at":"2026-05-21T01:04:39Z"},{"alias_kind":"pith_short_16","alias_value":"IKYMK57DEIMAD4PU","created_at":"2026-05-21T01:04:39Z"},{"alias_kind":"pith_short_8","alias_value":"IKYMK57D","created_at":"2026-05-21T01:04:39Z"}],"graph_snapshots":[{"event_id":"sha256:000f25d536e33c87eded7ab616a10320d85d6dda230202cfdf2793ed009473a8","target":"graph","created_at":"2026-05-21T01:04:39Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2605.20498/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"At the end of its discovery apparition, the $\\sim$60 m near-Earth object 2024 YR4 was associated with a non-zero probability of lunar impact during its 2032 December 22 close approach. While posing no threat to Earth, a lunar impact of this scale could have consequences for Earth-orbiting infrastructure, as well as for human exploration on and around the Moon. We present new JWST/NIRCam observations from 2026 February 18 and 26 that extend the observational arc by eight months, reduce the uncertainty in the 2032 lunar encounter by a factor $>$30, and constitute the faintest detection of a near","authors_text":"Andrew S. Rivkin, Artem Y. Burdanov, Bryan Holler, Cristina A. Thomas, Davide Farnocchia, David J. Tholen, Dawn Graninger, Heidi B. Hammel, Isaac S. Narrett, Julien de Wit, Marco Micheli, Maxime Devogele, Petr Pravec, Stefanie N. Milam, Thomas Mueller","cross_cats":["astro-ph.IM"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2026-05-19T21:06:11Z","title":"JWST Observations of Asteroid 2024 YR4 Rule Out a 2032 Lunar Impact and Demonstrate a New Regime for Planetary Defense Follow-up"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2605.20498","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:fc53ef7a4628fc5091331afce6f4acf27ff2b200a574402ff9d318d6aaff5a04","target":"record","created_at":"2026-05-21T01:04:39Z","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":"ef70ffae80157febec890ad838f50eba59badaf9fb56b873ef84d5170db98767","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2026-05-19T21:06:11Z","title_canon_sha256":"4a7835cc2833843bef958d8c2890cf24416c47dcbebc78f51880ce60ffe1f171"},"schema_version":"1.0","source":{"id":"2605.20498","kind":"arxiv","version":1}},"canonical_sha256":"42b0c577e3221801f1f4d45fe5ec74ab28bf466a45b23cf69a944ca330325054","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"42b0c577e3221801f1f4d45fe5ec74ab28bf466a45b23cf69a944ca330325054","first_computed_at":"2026-05-21T01:04:39.917321Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-21T01:04:39.917321Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"0Rax/9OIv1y3qY5/gP9CBgIbZu+uzKwjSenJe2PmBHZouflQVaSlL2B3Oi8SEAsiHxw9GsEmcf1qOHgEF6iZCA==","signature_status":"signed_v1","signed_at":"2026-05-21T01:04:39.917863Z","signed_message":"canonical_sha256_bytes"},"source_id":"2605.20498","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:fc53ef7a4628fc5091331afce6f4acf27ff2b200a574402ff9d318d6aaff5a04","sha256:000f25d536e33c87eded7ab616a10320d85d6dda230202cfdf2793ed009473a8"],"state_sha256":"f767bdf138230d76c1d831a45e7af6c334d20f750bb59c7752a123bceb5d8f5b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oco6reIQe8+hiS3oCFLWPYfyjF9NjCQGTFklIZ9OV8OKUIexEIZppRYOvLQGU/iMSmoI+8RG0GFZHf37vM0+Dw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-22T05:31:07.646207Z","bundle_sha256":"9b866dc24b4edb5cd7c3e5de33d7faf4c898fcb8edcebee0a62c8a18a2bccec8"}}