{"calculation_version":"2026-10-10.1","forecast_source":"history","night_date":"2026-03-31","schedule":[{"end":"2026-04-01T04:05Z","end_local":"07:05","hours":11.33,"mean_quality":0.0,"start":"2026-03-31T16:45Z","start_local":"19:45","target":null}],"targets":[{"best_window":null,"dec":-5.3876,"moon_separation":93.3,"name":"M42","quality_hours":0.05,"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":1,"score_astronomy":7,"score_weather":10,"transit":{"airmass":1.47,"alt":42.9,"az":179.5,"t":"2026-03-31T15:20Z"},"verdict":"poor","weather_known":true,"windows":[{"end":"2026-03-31T17:15Z","end_local":"20:15","hours":0.5,"label":"unusable","mean_quality":0.0,"start":"2026-03-31T16:45Z","start_local":"19:45"},{"end":"2026-03-31T18:00Z","end_local":"21:00","hours":0.75,"label":"poor","mean_quality":0.04,"start":"2026-03-31T17:15Z","start_local":"20:15"},{"end":"2026-03-31T19:00Z","end_local":"22:00","hours":1.0,"label":"unusable","mean_quality":0.0,"start":"2026-03-31T18:00Z","start_local":"21:00"},{"end":"2026-03-31T19:10Z","end_local":"22:10","hours":0.17,"label":"poor","mean_quality":0.11,"start":"2026-03-31T19:00Z","start_local":"22:00"},{"end":"2026-04-01T04:05Z","end_local":"07:05","hours":8.92,"label":"unusable","mean_quality":0.0,"start":"2026-03-31T19:10Z","start_local":"22:10"}]}],"unscheduled":[{"name":"M42","why":"Overcast (\u226580 % cloud) for 8.7 of 10.4 dark hours \u2014 the sky is closed whatever the geometry says."}],"warnings":[]}