{"calculation_version":"2026-10-10.1","forecast_source":"history","night_date":"2025-09-20","schedule":[{"end":"2025-09-20T17:25Z","end_local":"20:25","hours":1.08,"mean_quality":0.0,"start":"2025-09-20T16:20Z","start_local":"19:20","target":null},{"end":"2025-09-20T20:00Z","end_local":"23:00","hours":2.58,"mean_quality":0.8,"start":"2025-09-20T17:25Z","start_local":"20:25","target":"HD 189733"},{"end":"2025-09-20T22:00Z","end_local":"01:00","hours":2.0,"mean_quality":0.0,"start":"2025-09-20T20:00Z","start_local":"23:00","target":null},{"end":"2025-09-20T23:55Z","end_local":"02:55","hours":1.92,"mean_quality":0.65,"start":"2025-09-20T22:00Z","start_local":"01:00","target":"HD 189733"},{"end":"2025-09-21T04:10Z","end_local":"07:10","hours":4.25,"mean_quality":0.0,"start":"2025-09-20T23:55Z","start_local":"02:55","target":null}],"targets":[{"best_window":{"end":"2025-09-20T20:00Z","end_local":"23:00","hours":2.0,"label":"good","mean_quality":0.91,"start":"2025-09-20T18:00Z","start_local":"21:00"},"dec":22.71085365,"moon_separation":125.0,"name":"HD 189733","quality_hours":3.66,"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":64,"score_astronomy":100,"score_weather":64,"transit":{"airmass":1.06,"alt":71.1,"az":181.2,"t":"2025-09-20T18:25Z"},"verdict":"marginal","weather_known":true,"windows":[{"end":"2025-09-20T16:50Z","end_local":"19:50","hours":0.5,"label":"unusable","mean_quality":0.0,"start":"2025-09-20T16:20Z","start_local":"19:20"},{"end":"2025-09-20T17:25Z","end_local":"20:25","hours":0.58,"label":"poor","mean_quality":0.14,"start":"2025-09-20T16:50Z","start_local":"19:50"},{"end":"2025-09-20T18:00Z","end_local":"21:00","hours":0.58,"label":"marginal","mean_quality":0.46,"start":"2025-09-20T17:25Z","start_local":"20:25"},{"end":"2025-09-20T20:00Z","end_local":"23:00","hours":2.0,"label":"good","mean_quality":0.91,"start":"2025-09-20T18:00Z","start_local":"21:00"},{"end":"2025-09-20T21:00Z","end_local":"00:00","hours":1.0,"label":"unusable","mean_quality":0.0,"start":"2025-09-20T20:00Z","start_local":"23:00"},{"end":"2025-09-20T22:00Z","end_local":"01:00","hours":1.0,"label":"poor","mean_quality":0.25,"start":"2025-09-20T21:00Z","start_local":"00:00"},{"end":"2025-09-20T23:25Z","end_local":"02:25","hours":1.42,"label":"good","mean_quality":0.7,"start":"2025-09-20T22:00Z","start_local":"01:00"},{"end":"2025-09-20T23:55Z","end_local":"02:55","hours":0.5,"label":"marginal","mean_quality":0.51,"start":"2025-09-20T23:25Z","start_local":"02:25"},{"end":"2025-09-21T04:10Z","end_local":"07:10","hours":4.25,"label":"unusable","mean_quality":0.0,"start":"2025-09-20T23:55Z","start_local":"02:55"}]}],"unscheduled":[],"warnings":[]}