{"calculation_version":"2026-10-10.1","forecast_source":"history","night_date":"2025-12-20","schedule":[{"end":"2025-12-20T16:00Z","end_local":"18:00","hours":1.17,"mean_quality":0.0,"start":"2025-12-20T14:50Z","start_local":"16:50","target":null},{"end":"2025-12-20T17:00Z","end_local":"19:00","hours":1.0,"mean_quality":0.57,"start":"2025-12-20T16:00Z","start_local":"18:00","target":"M45"},{"end":"2025-12-21T05:45Z","end_local":"07:45","hours":12.75,"mean_quality":0.0,"start":"2025-12-20T17:00Z","start_local":"19:00","target":null}],"targets":[{"best_window":{"end":"2025-12-20T17:00Z","end_local":"19:00","hours":0.42,"label":"good","mean_quality":0.81,"start":"2025-12-20T16:35Z","start_local":"18:35"},"dec":24.11388889,"moon_separation":141.1,"name":"M45","quality_hours":0.63,"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":7,"score_astronomy":100,"score_weather":7,"transit":{"airmass":1.05,"alt":72.5,"az":179.7,"t":"2025-12-20T20:10Z"},"verdict":"poor","weather_known":true,"windows":[{"end":"2025-12-20T15:25Z","end_local":"17:25","hours":0.58,"label":"unusable","mean_quality":0.0,"start":"2025-12-20T14:50Z","start_local":"16:50"},{"end":"2025-12-20T16:00Z","end_local":"18:00","hours":0.58,"label":"poor","mean_quality":0.1,"start":"2025-12-20T15:25Z","start_local":"17:25"},{"end":"2025-12-20T16:35Z","end_local":"18:35","hours":0.58,"label":"marginal","mean_quality":0.39,"start":"2025-12-20T16:00Z","start_local":"18:00"},{"end":"2025-12-20T17:00Z","end_local":"19:00","hours":0.42,"label":"good","mean_quality":0.81,"start":"2025-12-20T16:35Z","start_local":"18:35"},{"end":"2025-12-21T05:45Z","end_local":"07:45","hours":12.75,"label":"unusable","mean_quality":0.0,"start":"2025-12-20T17:00Z","start_local":"19:00"}]}],"unscheduled":[],"warnings":[]}