{"calculation_version":"2026-10-10.1","forecast_source":"history","night_date":"2026-03-04","schedule":[{"end":"2026-03-05T04:50Z","end_local":"06:50","hours":12.67,"mean_quality":0.0,"start":"2026-03-04T16:10Z","start_local":"18:10","target":null}],"targets":[{"best_window":null,"dec":24.11388889,"moon_separation":122.2,"name":"M45","quality_hours":0.02,"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":0,"score_astronomy":58,"score_weather":1,"transit":{"airmass":1.05,"alt":72.5,"az":180.5,"t":"2026-03-04T15:20Z"},"verdict":"unusable","weather_known":true,"windows":[{"end":"2026-03-04T16:45Z","end_local":"18:45","hours":0.58,"label":"unusable","mean_quality":0.0,"start":"2026-03-04T16:10Z","start_local":"18:10"},{"end":"2026-03-04T17:00Z","end_local":"19:00","hours":0.25,"label":"poor","mean_quality":0.08,"start":"2026-03-04T16:45Z","start_local":"18:45"},{"end":"2026-03-05T04:50Z","end_local":"06:50","hours":11.83,"label":"unusable","mean_quality":0.0,"start":"2026-03-04T17:00Z","start_local":"19:00"}]}],"unscheduled":[{"name":"M45","why":"Overcast (\u226580 % cloud) for 11.4 of 11.7 dark hours \u2014 the sky is closed whatever the geometry says."}],"warnings":[]}