{"calculation_version":"2026-10-10.1","forecast_source":"history","night_date":"2025-12-23","schedule":[{"end":"2025-12-24T05:50Z","end_local":"07:50","hours":15.0,"mean_quality":0.0,"start":"2025-12-23T14:50Z","start_local":"16:50","target":null}],"targets":[{"best_window":null,"dec":24.11388889,"moon_separation":104.0,"name":"M45","quality_hours":0.11,"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":100,"score_weather":1,"transit":{"airmass":1.05,"alt":72.5,"az":181.1,"t":"2025-12-23T20:00Z"},"verdict":"poor","weather_known":true,"windows":[{"end":"2025-12-23T15:30Z","end_local":"17:30","hours":0.67,"label":"unusable","mean_quality":0.0,"start":"2025-12-23T14:50Z","start_local":"16:50"},{"end":"2025-12-23T17:00Z","end_local":"19:00","hours":1.5,"label":"poor","mean_quality":0.07,"start":"2025-12-23T15:30Z","start_local":"17:30"},{"end":"2025-12-24T05:50Z","end_local":"07:50","hours":12.83,"label":"unusable","mean_quality":0.0,"start":"2025-12-23T17:00Z","start_local":"19:00"}]}],"unscheduled":[{"name":"M45","why":"Overcast (\u226580 % cloud) for 12.3 of 13.8 dark hours \u2014 the sky is closed whatever the geometry says."}],"warnings":[]}