{"calculation_version":"2026-10-10.1","forecast_source":"history","night_date":"2025-12-13","schedule":[{"end":"2025-12-14T05:45Z","end_local":"07:45","hours":14.92,"mean_quality":0.0,"start":"2025-12-13T14:50Z","start_local":"16:50","target":null}],"targets":[{"best_window":null,"dec":-5.3876,"moon_separation":108.1,"name":"M42","quality_hours":0.38,"ra":83.8201,"resolved":{"common_name":"Great Orion Nebula","dec":-5.3876,"name":"M 42","ra":83.8201,"simbad_url":"https://simbad.cds.unistra.fr/simbad/sim-id?Ident=M42","source":"sesame","type":"HII","type_text":"HII region \u2014 a star-forming nebula"},"score":6,"score_astronomy":89,"score_weather":6,"transit":{"airmass":1.47,"alt":42.9,"az":179.6,"t":"2025-12-13T22:25Z"},"verdict":"poor","weather_known":true,"windows":[{"end":"2025-12-13T19:00Z","end_local":"21:00","hours":4.17,"label":"unusable","mean_quality":0.0,"start":"2025-12-13T14:50Z","start_local":"16:50"},{"end":"2025-12-13T21:00Z","end_local":"23:00","hours":2.0,"label":"poor","mean_quality":0.19,"start":"2025-12-13T19:00Z","start_local":"21:00"},{"end":"2025-12-14T05:45Z","end_local":"07:45","hours":8.75,"label":"unusable","mean_quality":0.0,"start":"2025-12-13T21:00Z","start_local":"23:00"}]}],"unscheduled":[{"name":"M42","why":"no usable window tonight"}],"warnings":[]}