{"calculation_version":"2026-10-10.1","forecast_source":"history","night_date":"2026-04-04","schedule":[{"end":"2026-04-05T04:00Z","end_local":"07:00","hours":11.25,"mean_quality":0.0,"start":"2026-04-04T16:45Z","start_local":"19:45","target":null}],"targets":[{"best_window":null,"dec":24.17805556,"moon_separation":167.6,"name":"M45","quality_hours":0.0,"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":0,"score_astronomy":7,"score_weather":0,"transit":{"airmass":1.05,"alt":72.6,"az":181.7,"t":"2026-04-04T13:20Z"},"verdict":"unusable","weather_known":true,"windows":[{"end":"2026-04-05T04:00Z","end_local":"07:00","hours":11.25,"label":"unusable","mean_quality":0.0,"start":"2026-04-04T16:45Z","start_local":"19:45"}]}],"unscheduled":[{"name":"M45","why":"no usable window tonight"}],"warnings":[]}