{"paper":{"title":"Alpha Cygnids - a possible July minor meteor shower","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Arkadiusz Olech, Marcin Gajos, Michal Jurek (Warsaw University Observatory)","submitted_at":"1998-07-02T08:19:06Z","abstract_excerpt":"We present a comprehensive study of a possible $\\alpha$-Cygnid meteor shower. Based on visual and telescopic observations made by Polish observers we estimate basic parameters of the stream. Activity of $\\alpha$-Cygnids lasts from around June 30 to July 31 with clear maximum near July 18 (solar longitude $\\lambda_\\odot=116.5^\\circ$). Maximal Zenithal Hourly Rates (ZHRs) are equal to $3.6\\pm1.2$. The structure of the radiant analyzed by {\\sc radiant} software is most compact for geocentric velocity of the events equal to 41 km/s, and for the drift of the radiant (in units $^\\circ$/day) equal to"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9807017","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"}