{"calculation_version":"2026-10-10.1","forecast_source":"history","night_date":"2026-08-27","schedule":[{"end":"2026-08-27T18:45Z","end_local":"21:45","hours":1.75,"mean_quality":0.0,"start":"2026-08-27T17:00Z","start_local":"20:00","target":null},{"end":"2026-08-28T01:05Z","end_local":"04:05","hours":6.33,"mean_quality":0.44,"start":"2026-08-27T18:45Z","start_local":"21:45","target":"HD 189733"},{"end":"2026-08-28T03:45Z","end_local":"06:45","hours":2.67,"mean_quality":0.0,"start":"2026-08-28T01:05Z","start_local":"04:05","target":null}],"targets":[{"best_window":{"end":"2026-08-28T01:05Z","end_local":"04:05","hours":6.33,"label":"marginal","mean_quality":0.44,"start":"2026-08-27T18:45Z","start_local":"21:45"},"dec":22.71085365,"moon_separation":46.8,"name":"HD 189733","quality_hours":3.1,"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":43,"score_astronomy":44,"score_weather":97,"transit":{"airmass":1.06,"alt":71.1,"az":181.0,"t":"2026-08-27T20:00Z"},"verdict":"marginal","weather_known":true,"windows":[{"end":"2026-08-27T17:35Z","end_local":"20:35","hours":0.58,"label":"unusable","mean_quality":0.0,"start":"2026-08-27T17:00Z","start_local":"20:00"},{"end":"2026-08-27T18:45Z","end_local":"21:45","hours":1.17,"label":"poor","mean_quality":0.17,"start":"2026-08-27T17:35Z","start_local":"20:35"},{"end":"2026-08-28T01:05Z","end_local":"04:05","hours":6.33,"label":"marginal","mean_quality":0.44,"start":"2026-08-27T18:45Z","start_local":"21:45"},{"end":"2026-08-28T01:30Z","end_local":"04:30","hours":0.42,"label":"poor","mean_quality":0.26,"start":"2026-08-28T01:05Z","start_local":"04:05"},{"end":"2026-08-28T03:45Z","end_local":"06:45","hours":2.25,"label":"unusable","mean_quality":0.0,"start":"2026-08-28T01:30Z","start_local":"04:30"}]}],"unscheduled":[],"warnings":[]}
