{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2017:FTUSM4EG75Z6O5KUPGDPASFPKR","short_pith_number":"pith:FTUSM4EG","schema_version":"1.0","canonical_sha256":"2ce9267086ff73e775547986f048af547e467114cfa23222d371fd1fd37750cc","source":{"kind":"arxiv","id":"1702.00335","version":2},"attestation_state":"computed","paper":{"title":"Control of a Bucket-Wheel for Surface Mining of Asteroids and Small-Bodies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.IM"],"primary_cat":"cs.SY","authors_text":"Erik Asphaug, Jekan Thangavelautham, Ravi Teja Nallapu","submitted_at":"2017-02-01T16:14:51Z","abstract_excerpt":"Near Earth Asteroids (NEAs) are thought to contain a wealth of resources, including water, iron, titanium, nickel, platinum and silicates. Future space missions that can exploit these resources by performing In-Situ Resource Utilization (ISRU) gain substantial benefit in terms of range, payload capacity and mission flexibility. Compared to the Moon or Mars, the milligravity on some asteroids demands a fraction of the energy for digging and accessing hydrated regolith just below the surface. However, asteroids and small-bodies, because of their low gravity present a major challenge in landing, "},"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":"1702.00335","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SY","submitted_at":"2017-02-01T16:14:51Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"1bf8178cf6f2761b57988592902df6af7924c310c61da1964c70b4967cc9fc7a","abstract_canon_sha256":"ac9e2860a0a374d378fb68135d8da04f885b67519db8f2083d22745713a3fc56"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:50:16.857786Z","signature_b64":"PVZDhuAORoVpowc+rSncTW33iSku7lr/EguXUtJ/bd2TPd3ql6pG6dm/qyk7cUWOKdPfYJCO4DjpvxdwKLR7AA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2ce9267086ff73e775547986f048af547e467114cfa23222d371fd1fd37750cc","last_reissued_at":"2026-05-18T00:50:16.857251Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:50:16.857251Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Control of a Bucket-Wheel for Surface Mining of Asteroids and Small-Bodies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.IM"],"primary_cat":"cs.SY","authors_text":"Erik Asphaug, Jekan Thangavelautham, Ravi Teja Nallapu","submitted_at":"2017-02-01T16:14:51Z","abstract_excerpt":"Near Earth Asteroids (NEAs) are thought to contain a wealth of resources, including water, iron, titanium, nickel, platinum and silicates. Future space missions that can exploit these resources by performing In-Situ Resource Utilization (ISRU) gain substantial benefit in terms of range, payload capacity and mission flexibility. Compared to the Moon or Mars, the milligravity on some asteroids demands a fraction of the energy for digging and accessing hydrated regolith just below the surface. However, asteroids and small-bodies, because of their low gravity present a major challenge in landing, "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1702.00335","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1702.00335","created_at":"2026-05-18T00:50:16.857352+00:00"},{"alias_kind":"arxiv_version","alias_value":"1702.00335v2","created_at":"2026-05-18T00:50:16.857352+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1702.00335","created_at":"2026-05-18T00:50:16.857352+00:00"},{"alias_kind":"pith_short_12","alias_value":"FTUSM4EG75Z6","created_at":"2026-05-18T12:31:15.632608+00:00"},{"alias_kind":"pith_short_16","alias_value":"FTUSM4EG75Z6O5KU","created_at":"2026-05-18T12:31:15.632608+00:00"},{"alias_kind":"pith_short_8","alias_value":"FTUSM4EG","created_at":"2026-05-18T12:31:15.632608+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/FTUSM4EG75Z6O5KUPGDPASFPKR","json":"https://pith.science/pith/FTUSM4EG75Z6O5KUPGDPASFPKR.json","graph_json":"https://pith.science/api/pith-number/FTUSM4EG75Z6O5KUPGDPASFPKR/graph.json","events_json":"https://pith.science/api/pith-number/FTUSM4EG75Z6O5KUPGDPASFPKR/events.json","paper":"https://pith.science/paper/FTUSM4EG"},"agent_actions":{"view_html":"https://pith.science/pith/FTUSM4EG75Z6O5KUPGDPASFPKR","download_json":"https://pith.science/pith/FTUSM4EG75Z6O5KUPGDPASFPKR.json","view_paper":"https://pith.science/paper/FTUSM4EG","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1702.00335&json=true","fetch_graph":"https://pith.science/api/pith-number/FTUSM4EG75Z6O5KUPGDPASFPKR/graph.json","fetch_events":"https://pith.science/api/pith-number/FTUSM4EG75Z6O5KUPGDPASFPKR/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/FTUSM4EG75Z6O5KUPGDPASFPKR/action/timestamp_anchor","attest_storage":"https://pith.science/pith/FTUSM4EG75Z6O5KUPGDPASFPKR/action/storage_attestation","attest_author":"https://pith.science/pith/FTUSM4EG75Z6O5KUPGDPASFPKR/action/author_attestation","sign_citation":"https://pith.science/pith/FTUSM4EG75Z6O5KUPGDPASFPKR/action/citation_signature","submit_replication":"https://pith.science/pith/FTUSM4EG75Z6O5KUPGDPASFPKR/action/replication_record"}},"created_at":"2026-05-18T00:50:16.857352+00:00","updated_at":"2026-05-18T00:50:16.857352+00:00"}