{"calculation_version":"2026-10-10.1","forecast_source":"history","night_date":"2026-03-30","schedule":[{"end":"2026-03-31T04:10Z","end_local":"07:10","hours":11.5,"mean_quality":0.0,"start":"2026-03-30T16:40Z","start_local":"19:40","target":null}],"targets":[{"best_window":null,"dec":24.17805556,"moon_separation":104.9,"name":"M45","quality_hours":0.02,"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":10,"score_weather":3,"transit":{"airmass":1.05,"alt":72.6,"az":178.2,"t":"2026-03-30T13:35Z"},"verdict":"unusable","weather_known":true,"windows":[{"end":"2026-03-30T19:00Z","end_local":"22:00","hours":2.33,"label":"unusable","mean_quality":0.0,"start":"2026-03-30T16:40Z","start_local":"19:40"},{"end":"2026-03-30T19:15Z","end_local":"22:15","hours":0.25,"label":"poor","mean_quality":0.07,"start":"2026-03-30T19:00Z","start_local":"22:00"},{"end":"2026-03-31T04:10Z","end_local":"07:10","hours":8.92,"label":"unusable","mean_quality":0.0,"start":"2026-03-30T19:15Z","start_local":"22:15"}]}],"unscheduled":[{"name":"M45","why":"Overcast (\u226580 % cloud) for 9.4 of 10.4 dark hours \u2014 the sky is closed whatever the geometry says."}],"warnings":[]}