{"calculation_version":"2026-10-10.1","forecast_source":"history","night_date":"2025-05-12","schedule":[{"end":"2025-05-13T03:05Z","end_local":"06:05","hours":9.58,"mean_quality":0.0,"start":"2025-05-12T17:30Z","start_local":"20:30","target":null}],"targets":[{"best_window":null,"dec":2.05238823,"moon_separation":49.8,"name":"3C 273","quality_hours":0.04,"ra":187.27791594,"resolved":{"dec":2.05238823,"morphology":"E3","name":"3C 273","ra":187.27791594,"simbad_url":"https://simbad.cds.unistra.fr/simbad/sim-id?Ident=3C%20273","source":"sesame","type":"BLL","type_text":"BL Lac object \u2014 a blazar","vmag":14.83},"score":1,"score_astronomy":31,"score_weather":2,"transit":{"airmass":1.3,"alt":50.2,"az":180.7,"t":"2025-05-12T19:30Z"},"verdict":"poor","weather_known":true,"windows":[{"end":"2025-05-12T18:05Z","end_local":"21:05","hours":0.58,"label":"unusable","mean_quality":0.0,"start":"2025-05-12T17:30Z","start_local":"20:30"},{"end":"2025-05-12T19:00Z","end_local":"22:00","hours":0.92,"label":"poor","mean_quality":0.05,"start":"2025-05-12T18:05Z","start_local":"21:05"},{"end":"2025-05-13T03:05Z","end_local":"06:05","hours":8.08,"label":"unusable","mean_quality":0.0,"start":"2025-05-12T19:00Z","start_local":"22:00"}]}],"unscheduled":[{"name":"3C 273","why":"Overcast (\u226580 % cloud) for 7.6 of 8.5 dark hours \u2014 the sky is closed whatever the geometry says."}],"warnings":[]}