{"calculation_version":"2026-10-10.1","forecast_source":"history","night_date":"2025-03-11","schedule":[{"end":"2025-03-12T04:40Z","end_local":"06:40","hours":12.33,"mean_quality":0.0,"start":"2025-03-11T16:20Z","start_local":"18:20","target":null}],"targets":[{"best_window":null,"dec":-5.3876,"moon_separation":67.3,"name":"M42","quality_hours":0.14,"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":2,"score_astronomy":14,"score_weather":12,"transit":{"airmass":1.47,"alt":42.9,"az":180.3,"t":"2025-03-11T16:40Z"},"verdict":"poor","weather_known":true,"windows":[{"end":"2025-03-11T16:55Z","end_local":"18:55","hours":0.58,"label":"unusable","mean_quality":0.0,"start":"2025-03-11T16:20Z","start_local":"18:20"},{"end":"2025-03-11T19:00Z","end_local":"21:00","hours":2.08,"label":"poor","mean_quality":0.07,"start":"2025-03-11T16:55Z","start_local":"18:55"},{"end":"2025-03-12T04:40Z","end_local":"06:40","hours":9.67,"label":"unusable","mean_quality":0.0,"start":"2025-03-11T19:00Z","start_local":"21:00"}]}],"unscheduled":[{"name":"M42","why":"Overcast (\u226580 % cloud) for 9.2 of 11.3 dark hours \u2014 the sky is closed whatever the geometry says."}],"warnings":[]}