{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2011:WMHTLGJHZBZY7YZCCV4456BS4W","short_pith_number":"pith:WMHTLGJH","schema_version":"1.0","canonical_sha256":"b30f359927c8738fe3221579cef832e5a18dce36229d814f6a108694dd68d421","source":{"kind":"arxiv","id":"1111.3292","version":1},"attestation_state":"computed","paper":{"title":"Limits to Ice on Asteroids (24) Themis and (65) Cybele","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"A. Guilbert-Lepoutre, D. Jewitt","submitted_at":"2011-11-14T17:23:34Z","abstract_excerpt":"We present optical spectra of (24) Themis and (65) Cybele, two large main-belt asteroids on which exposed water ice has recently been reported. No emission lines, expected from resonance fluorescence in gas sublimated from the ice, were detected. Derived limits to the production rates of water are < 400 kg/s (5{\\sigma}), for each object, assuming a cometary H2O/CN ratio. We rule out models in which a large fraction of the surface is occupied by high albedo (\"fresh\") water ice because the measured albedos of Themis and Cybele are low (0.05 - 0.07). We also rule out models in which a large fract"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1111.3292","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2011-11-14T17:23:34Z","cross_cats_sorted":[],"title_canon_sha256":"69794e333f83ce4ccafe53c994f2367590a2438711f8f2259c997e768b76c8f1","abstract_canon_sha256":"519cc5b2fac3cae30bd59abb15a804e871781ff0947d5ef84287ddd3db6a9469"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:59:33.651588Z","signature_b64":"dZqyNkQX9mOgcES/WOIV6yGEOWKGHpxDuZCXf2loO4VE61lQaWbTO7OSnh+ndYne4MCOCrBKmZ/b68PVeVB5Bg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b30f359927c8738fe3221579cef832e5a18dce36229d814f6a108694dd68d421","last_reissued_at":"2026-05-18T01:59:33.651088Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:59:33.651088Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Limits to Ice on Asteroids (24) Themis and (65) Cybele","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"A. Guilbert-Lepoutre, D. Jewitt","submitted_at":"2011-11-14T17:23:34Z","abstract_excerpt":"We present optical spectra of (24) Themis and (65) Cybele, two large main-belt asteroids on which exposed water ice has recently been reported. No emission lines, expected from resonance fluorescence in gas sublimated from the ice, were detected. Derived limits to the production rates of water are < 400 kg/s (5{\\sigma}), for each object, assuming a cometary H2O/CN ratio. We rule out models in which a large fraction of the surface is occupied by high albedo (\"fresh\") water ice because the measured albedos of Themis and Cybele are low (0.05 - 0.07). We also rule out models in which a large fract"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1111.3292","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1111.3292","created_at":"2026-05-18T01:59:33.651162+00:00"},{"alias_kind":"arxiv_version","alias_value":"1111.3292v1","created_at":"2026-05-18T01:59:33.651162+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1111.3292","created_at":"2026-05-18T01:59:33.651162+00:00"},{"alias_kind":"pith_short_12","alias_value":"WMHTLGJHZBZY","created_at":"2026-05-18T12:26:44.992195+00:00"},{"alias_kind":"pith_short_16","alias_value":"WMHTLGJHZBZY7YZC","created_at":"2026-05-18T12:26:44.992195+00:00"},{"alias_kind":"pith_short_8","alias_value":"WMHTLGJH","created_at":"2026-05-18T12:26:44.992195+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/WMHTLGJHZBZY7YZCCV4456BS4W","json":"https://pith.science/pith/WMHTLGJHZBZY7YZCCV4456BS4W.json","graph_json":"https://pith.science/api/pith-number/WMHTLGJHZBZY7YZCCV4456BS4W/graph.json","events_json":"https://pith.science/api/pith-number/WMHTLGJHZBZY7YZCCV4456BS4W/events.json","paper":"https://pith.science/paper/WMHTLGJH"},"agent_actions":{"view_html":"https://pith.science/pith/WMHTLGJHZBZY7YZCCV4456BS4W","download_json":"https://pith.science/pith/WMHTLGJHZBZY7YZCCV4456BS4W.json","view_paper":"https://pith.science/paper/WMHTLGJH","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1111.3292&json=true","fetch_graph":"https://pith.science/api/pith-number/WMHTLGJHZBZY7YZCCV4456BS4W/graph.json","fetch_events":"https://pith.science/api/pith-number/WMHTLGJHZBZY7YZCCV4456BS4W/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/WMHTLGJHZBZY7YZCCV4456BS4W/action/timestamp_anchor","attest_storage":"https://pith.science/pith/WMHTLGJHZBZY7YZCCV4456BS4W/action/storage_attestation","attest_author":"https://pith.science/pith/WMHTLGJHZBZY7YZCCV4456BS4W/action/author_attestation","sign_citation":"https://pith.science/pith/WMHTLGJHZBZY7YZCCV4456BS4W/action/citation_signature","submit_replication":"https://pith.science/pith/WMHTLGJHZBZY7YZCCV4456BS4W/action/replication_record"}},"created_at":"2026-05-18T01:59:33.651162+00:00","updated_at":"2026-05-18T01:59:33.651162+00:00"}