{"calculation_version":"2026-10-10.1","forecast_source":"history","night_date":"2025-03-31","schedule":[{"end":"2025-04-01T04:05Z","end_local":"07:05","hours":11.33,"mean_quality":0.0,"start":"2025-03-31T16:45Z","start_local":"19:45","target":null}],"targets":[{"best_window":null,"dec":24.11388889,"moon_separation":13.3,"name":"M45","quality_hours":0.07,"ra":56.60083333,"resolved":{"common_name":"Seven Sisters","dec":24.11388889,"name":"Cl Melotte 22","ra":56.60083333,"simbad_url":"https://simbad.cds.unistra.fr/simbad/sim-id?Ident=M45","source":"sesame","type":"OpC","type_text":"open cluster"},"score":1,"score_astronomy":12,"score_weather":11,"transit":{"airmass":1.05,"alt":72.5,"az":178.3,"t":"2025-03-31T13:30Z"},"verdict":"poor","weather_known":true,"windows":[{"end":"2025-03-31T17:15Z","end_local":"20:15","hours":0.5,"label":"unusable","mean_quality":0.0,"start":"2025-03-31T16:45Z","start_local":"19:45"},{"end":"2025-03-31T18:00Z","end_local":"21:00","hours":0.75,"label":"poor","mean_quality":0.1,"start":"2025-03-31T17:15Z","start_local":"20:15"},{"end":"2025-04-01T04:05Z","end_local":"07:05","hours":10.08,"label":"unusable","mean_quality":0.0,"start":"2025-03-31T18:00Z","start_local":"21:00"}]}],"unscheduled":[{"name":"M45","why":"Overcast (\u226580 % cloud) for 9.7 of 10.4 dark hours \u2014 the sky is closed whatever the geometry says."}],"warnings":[]}