{"calculation_version":"2026-10-10.1","forecast_source":"history","night_date":"2025-05-23","schedule":[{"end":"2025-05-24T02:55Z","end_local":"05:55","hours":9.25,"mean_quality":0.0,"start":"2025-05-23T17:40Z","start_local":"20:40","target":null}],"targets":[{"best_window":null,"dec":22.71085365,"moon_separation":73.4,"name":"HD 189733","quality_hours":0.2,"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":5,"score_astronomy":100,"score_weather":5,"transit":{"airmass":1.06,"alt":71.1,"az":179.9,"t":"2025-05-24T02:15Z"},"verdict":"poor","weather_known":true,"windows":[{"end":"2025-05-23T20:45Z","end_local":"23:45","hours":3.08,"label":"unusable","mean_quality":0.0,"start":"2025-05-23T17:40Z","start_local":"20:40"},{"end":"2025-05-23T21:00Z","end_local":"00:00","hours":0.25,"label":"poor","mean_quality":0.09,"start":"2025-05-23T20:45Z","start_local":"23:45"},{"end":"2025-05-24T01:00Z","end_local":"04:00","hours":4.0,"label":"unusable","mean_quality":0.0,"start":"2025-05-23T21:00Z","start_local":"00:00"},{"end":"2025-05-24T02:00Z","end_local":"05:00","hours":1.0,"label":"poor","mean_quality":0.18,"start":"2025-05-24T01:00Z","start_local":"04:00"},{"end":"2025-05-24T02:55Z","end_local":"05:55","hours":0.92,"label":"unusable","mean_quality":0.0,"start":"2025-05-24T02:00Z","start_local":"05:00"}]}],"unscheduled":[{"name":"HD 189733","why":"Overcast (\u226580 % cloud) for 6.2 of 8.2 dark hours \u2014 the sky is closed whatever the geometry says."}],"warnings":[]}