{"calculation_version":"2026-10-10.1","forecast_source":"history","night_date":"2025-09-05","schedule":[{"end":"2025-09-06T03:55Z","end_local":"06:55","hours":11.17,"mean_quality":0.0,"start":"2025-09-05T16:45Z","start_local":"19:45","target":null}],"targets":[{"best_window":null,"dec":2.05238823,"moon_separation":134.1,"name":"3C 273","quality_hours":0.0,"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":0,"score_astronomy":0,"score_weather":0,"transit":{"airmass":1.3,"alt":50.2,"az":179.2,"t":"2025-09-05T11:50Z"},"verdict":"unusable","weather_known":true,"windows":[{"end":"2025-09-06T03:55Z","end_local":"06:55","hours":11.17,"label":"unusable","mean_quality":0.0,"start":"2025-09-05T16:45Z","start_local":"19:45"}]}],"unscheduled":[{"name":"3C 273","why":"Overcast (\u226580 % cloud) for 7.7 of 10.1 dark hours \u2014 the sky is closed whatever the geometry says."}],"warnings":[]}