{"calculation_version":"2026-10-10.1","forecast_source":"history","night_date":"2026-04-13","schedule":[{"end":"2026-04-14T03:45Z","end_local":"06:45","hours":10.83,"mean_quality":0.0,"start":"2026-04-13T16:55Z","start_local":"19:55","target":null}],"targets":[{"best_window":null,"dec":2.05238823,"moon_separation":151.1,"name":"3C 273","quality_hours":0.13,"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":2,"score_astronomy":93,"score_weather":2,"transit":{"airmass":1.3,"alt":50.2,"az":180.7,"t":"2026-04-13T21:25Z"},"verdict":"poor","weather_known":true,"windows":[{"end":"2026-04-13T20:00Z","end_local":"23:00","hours":3.08,"label":"unusable","mean_quality":0.0,"start":"2026-04-13T16:55Z","start_local":"19:55"},{"end":"2026-04-13T21:00Z","end_local":"00:00","hours":1.0,"label":"poor","mean_quality":0.13,"start":"2026-04-13T20:00Z","start_local":"23:00"},{"end":"2026-04-14T03:45Z","end_local":"06:45","hours":6.75,"label":"unusable","mean_quality":0.0,"start":"2026-04-13T21:00Z","start_local":"00:00"}]}],"unscheduled":[{"name":"3C 273","why":"Overcast (\u226580 % cloud) for 8.7 of 9.8 dark hours \u2014 the sky is closed whatever the geometry says."}],"warnings":[]}