{"paper":{"title":"Secular brightness curves of 272 comets","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"(2) Laboratoire de G\\'eologie de Lyon: Terre, (3) Institute of Astronomy, (4) Dep. Science, (5) INAF - Osservatorio Astronomico di Roma, (6) The University of Edinburgh, 7), (7) Instituto Pedro Nunes), A. Guilbert-Lepoutre (2), Bulgarian Academy of Sciences, CNRS, C. Snodgrass (6) ((1) Instituto de Astrof\\'isica e Ci\\^encias do Espa\\c{c}o, E. Mazzotta Epifani (5), EnsL, Environnement, L. Inno (4), National Astronomical Observatory, Parthenope University of Naples, P. Lacerda (1, Plan\\`etes, R . Kokotanekova (3), Technology, UCBL, Universidade de Coimbra","submitted_at":"2025-04-01T09:22:44Z","abstract_excerpt":"We investigate the brightening behavior of long-period comets as a function of dynamical age, defined by the original reciprocal semimajor axis, $1/a_0$. Our goal is to test long-standing claims about comet behavior using a large number of available measurements. We use a large set of photometric observations to compute and analyze global and local brightening curves for 272 long-period comets. Observed magnitudes are fitted with a linear model in log heliocentric distance, from which we derive brightening parameters for each comet. We categorize the sample into dynamically new, intermediate, "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2504.00565","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/2504.00565/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"}