{"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":24.17805556,"moon_separation":117.8,"name":"M45","quality_hours":0.06,"ra":56.65833333,"resolved":{"common_name":"Seven Sisters","dec":24.17805556,"name":"Cl Melotte 22","ra":56.65833333,"simbad_url":"https://simbad.cds.unistra.fr/simbad/sim-id?Ident=M45","source":"sesame","type":"OpC","type_text":"open cluster"},"score":1,"score_astronomy":10,"score_weather":9,"transit":{"airmass":1.05,"alt":72.6,"az":181.2,"t":"2026-03-31T13:35Z"},"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":0.05,"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":0.14,"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":"M45","why":"Overcast (\u226580 % cloud) for 8.7 of 10.4 dark hours \u2014 the sky is closed whatever the geometry says."}],"warnings":[]}