{"calculation_version":"2026-10-10.1","forecast_source":"history","night_date":"2025-12-23","schedule":[{"end":"2025-12-24T05:50Z","end_local":"07:50","hours":15.0,"mean_quality":0.0,"start":"2025-12-23T14:50Z","start_local":"16:50","target":null}],"targets":[{"best_window":null,"dec":41.26875,"moon_separation":76.3,"name":"M31","quality_hours":0.12,"ra":10.68470833,"resolved":{"common_name":"Andromeda Galaxy","dec":41.26875,"morphology":"SA(s)b","name":"M 31","ra":10.68470833,"simbad_url":"https://simbad.cds.unistra.fr/simbad/sim-id?Ident=M31","source":"sesame","type":"AGN","type_text":"galaxy with an active nucleus","vmag":3.44},"score":2,"score_astronomy":100,"score_weather":2,"transit":{"airmass":1.0,"alt":89.7,"az":169.8,"t":"2025-12-23T16:55Z"},"verdict":"poor","weather_known":true,"windows":[{"end":"2025-12-23T15:30Z","end_local":"17:30","hours":0.67,"label":"unusable","mean_quality":0.0,"start":"2025-12-23T14:50Z","start_local":"16:50"},{"end":"2025-12-23T17:00Z","end_local":"19:00","hours":1.5,"label":"poor","mean_quality":0.08,"start":"2025-12-23T15:30Z","start_local":"17:30"},{"end":"2025-12-24T05:50Z","end_local":"07:50","hours":12.83,"label":"unusable","mean_quality":0.0,"start":"2025-12-23T17:00Z","start_local":"19:00"}]}],"unscheduled":[{"name":"M31","why":"Overcast (\u226580 % cloud) for 12.3 of 13.8 dark hours \u2014 the sky is closed whatever the geometry says."}],"warnings":[]}