{"paper":{"title":"Large-scale Morphology of the Optical F-corona from a Total Solar Eclipse Observation During the Artemis II Lunar Flyby","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"A lunar flyby eclipse image shows the F-corona as a flattened ellipse aligned with the ecliptic, with radial brightness profiles supporting a dust density power-law index of about 1.3 near the Sun.","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.EP","authors_text":"Ko Arimatsu, Kohji Tsumura","submitted_at":"2026-04-15T14:17:43Z","abstract_excerpt":"We investigated the structure of the optical F-corona, i.e., inner zodiacal light, using a publicly released wide-field image of a total solar eclipse that was obtained during the Artemis~II crewed lunar flyby. In this image, the solar disk is fully occulted by the Moon, providing a rare view of diffuse circumsolar emission over a wide angular extent. Although the dataset is derived from a rendered RGB JPEG image without full photometric calibration, the gamma correction inherent to the image format was explicitly accounted for and the instrumental response was validated using field stars. The"},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"The observed F-corona exhibits a flattened, nearly elliptical morphology aligned with the ecliptic plane, with flattening indices of 0.52, 0.54, and 0.56 for the red, green, and blue channels, respectively. Radial intensity profiles along ecliptic longitude and latitude are well described by power laws in solar elongation, although the derived slopes are systematically steeper than previous observations. ... supporting a radial dust number-density power-law index of α ~1.3, even in regions near the Sun.","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"Although the dataset is derived from a rendered RGB JPEG image without full photometric calibration, the gamma correction inherent to the image format was explicitly accounted for and the instrumental response was validated using field stars, enabling a reliable analysis of the relative morphology and brightness profiles.","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"A total solar eclipse image from Artemis II reveals the F-corona as a flattened ellipse aligned with the ecliptic, with radial profiles supporting a dust density power-law index of approximately 1.3 near the Sun.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"A lunar flyby eclipse image shows the F-corona as a flattened ellipse aligned with the ecliptic, with radial brightness profiles supporting a dust density power-law index of about 1.3 near the Sun.","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"2c3b5331ca91c89a32eafd2e0285250e3962ee23e710cc2f6565552f6c425a81"},"source":{"id":"2604.13908","kind":"arxiv","version":3},"verdict":{"id":"94bc1fc0-10ba-4cb8-a886-2d7d06381800","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-12T01:53:00.133439Z","strongest_claim":"The observed F-corona exhibits a flattened, nearly elliptical morphology aligned with the ecliptic plane, with flattening indices of 0.52, 0.54, and 0.56 for the red, green, and blue channels, respectively. Radial intensity profiles along ecliptic longitude and latitude are well described by power laws in solar elongation, although the derived slopes are systematically steeper than previous observations. ... supporting a radial dust number-density power-law index of α ~1.3, even in regions near the Sun.","one_line_summary":"A total solar eclipse image from Artemis II reveals the F-corona as a flattened ellipse aligned with the ecliptic, with radial profiles supporting a dust density power-law index of approximately 1.3 near the Sun.","pipeline_version":"pith-pipeline@v0.9.0","weakest_assumption":"Although the dataset is derived from a rendered RGB JPEG image without full photometric calibration, the gamma correction inherent to the image format was explicitly accounted for and the instrumental response was validated using field stars, enabling a reliable analysis of the relative morphology and brightness profiles.","pith_extraction_headline":"A lunar flyby eclipse image shows the F-corona as a flattened ellipse aligned with the ecliptic, with radial brightness profiles supporting a dust density power-law index of about 1.3 near the Sun."},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2604.13908/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":2,"snapshot_sha256":"bd8d6739329f0957f863239aaf9ad1871b02809929879673c124e0c6fdbf8912"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}