{"calculation_version":"2026-10-10.1","forecast_source":"history","night_date":"2025-09-12","schedule":[{"end":"2025-09-13T01:00Z","end_local":"04:00","hours":8.42,"mean_quality":0.0,"start":"2025-09-12T16:35Z","start_local":"19:35","target":null},{"end":"2025-09-13T02:25Z","end_local":"05:25","hours":1.42,"mean_quality":0.45,"start":"2025-09-13T01:00Z","start_local":"04:00","target":"M45"},{"end":"2025-09-13T04:00Z","end_local":"07:00","hours":1.58,"mean_quality":0.0,"start":"2025-09-13T02:25Z","start_local":"05:25","target":null}],"targets":[{"best_window":{"end":"2025-09-13T02:25Z","end_local":"05:25","hours":1.42,"label":"marginal","mean_quality":0.45,"start":"2025-09-13T01:00Z","start_local":"04:00"},"dec":24.11388889,"moon_separation":1.1,"name":"M45","quality_hours":0.82,"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":10,"score_astronomy":33,"score_weather":31,"transit":{"airmass":1.05,"alt":72.5,"az":180.3,"t":"2025-09-13T02:40Z"},"verdict":"poor","weather_known":true,"windows":[{"end":"2025-09-13T01:00Z","end_local":"04:00","hours":8.42,"label":"unusable","mean_quality":0.0,"start":"2025-09-12T16:35Z","start_local":"19:35"},{"end":"2025-09-13T02:25Z","end_local":"05:25","hours":1.42,"label":"marginal","mean_quality":0.45,"start":"2025-09-13T01:00Z","start_local":"04:00"},{"end":"2025-09-13T03:35Z","end_local":"06:35","hours":1.17,"label":"poor","mean_quality":0.15,"start":"2025-09-13T02:25Z","start_local":"05:25"},{"end":"2025-09-13T04:00Z","end_local":"07:00","hours":0.42,"label":"unusable","mean_quality":0.0,"start":"2025-09-13T03:35Z","start_local":"06:35"}]}],"unscheduled":[],"warnings":[]}