{"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":22.71085365,"moon_separation":128.7,"name":"HD 189733","quality_hours":0.03,"ra":300.18213726,"resolved":{"dec":22.71085365,"name":"HD 189733","ra":300.18213726,"simbad_url":"https://simbad.cds.unistra.fr/simbad/sim-id?Ident=HD%20189733","source":"sesame","spectral_type":"K2V","type":"BY*","type_text":"BY Draconis variable \u2014 a spotted, rotating star","vmag":7.648},"score":0,"score_astronomy":100,"score_weather":0,"transit":{"airmass":1.06,"alt":71.1,"az":180.6,"t":"2025-08-19T20:30Z"},"verdict":"unusable","weather_known":true,"windows":[{"end":"2025-08-19T17:45Z","end_local":"20:45","hours":0.58,"label":"unusable","mean_quality":0.0,"start":"2025-08-19T17:10Z","start_local":"20:10"},{"end":"2025-08-19T18:00Z","end_local":"21:00","hours":0.25,"label":"poor","mean_quality":0.1,"start":"2025-08-19T17:45Z","start_local":"20:45"},{"end":"2025-08-20T03:35Z","end_local":"06:35","hours":9.58,"label":"unusable","mean_quality":0.0,"start":"2025-08-19T18:00Z","start_local":"21:00"}]}],"unscheduled":[{"name":"HD 189733","why":"Overcast (\u226580 % cloud) for 9.2 of 9.4 dark hours \u2014 the sky is closed whatever the geometry says."}],"warnings":[]}