{"calculation_version":"2026-10-10.1","forecast_source":"history","night_date":"2025-08-19","schedule":[{"end":"2025-08-20T03:35Z","end_local":"06:35","hours":10.42,"mean_quality":0.0,"start":"2025-08-19T17:10Z","start_local":"20:10","target":null}],"targets":[{"best_window":null,"dec":41.26875,"moon_separation":77.4,"name":"M31","quality_hours":0.0,"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":0,"score_astronomy":100,"score_weather":0,"transit":{"airmass":1.0,"alt":89.7,"az":156.4,"t":"2025-08-20T01:10Z"},"verdict":"unusable","weather_known":true,"windows":[{"end":"2025-08-20T03:35Z","end_local":"06:35","hours":10.42,"label":"unusable","mean_quality":0.0,"start":"2025-08-19T17:10Z","start_local":"20:10"}]}],"unscheduled":[{"name":"M31","why":"Overcast (\u226580 % cloud) for 9.2 of 9.4 dark hours \u2014 the sky is closed whatever the geometry says."}],"warnings":[]}