{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":6.17,"best_label":"good","best_window":"21:30\u201303:40","dark_hours":7.7,"date":"2032-09-02","moon_free_dark_hours":7.68,"moon_illumination":4,"moon_separation":141.4,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"22:35","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":6.08,"best_label":"good","best_window":"21:30\u201303:35","dark_hours":7.75,"date":"2032-09-03","moon_free_dark_hours":7.73,"moon_illumination":1,"moon_separation":137.1,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"22:30","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":6.0,"best_label":"good","best_window":"21:30\u201303:30","dark_hours":7.81,"date":"2032-09-04","moon_free_dark_hours":7.8,"moon_illumination":0,"moon_separation":130.7,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"22:25","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":6.08,"best_label":"good","best_window":"21:25\u201303:30","dark_hours":7.86,"date":"2032-09-05","moon_free_dark_hours":7.85,"moon_illumination":1,"moon_separation":122.9,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"22:20","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":6.0,"best_label":"good","best_window":"21:25\u201303:25","dark_hours":7.92,"date":"2032-09-06","moon_free_dark_hours":7.9,"moon_illumination":4,"moon_separation":114.2,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"22:15","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":6.0,"best_label":"good","best_window":"21:20\u201303:20","dark_hours":7.97,"date":"2032-09-07","moon_free_dark_hours":7.97,"moon_illumination":8,"moon_separation":105.0,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"22:15","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":5.92,"best_label":"good","best_window":"21:20\u201303:15","dark_hours":8.03,"date":"2032-09-08","moon_free_dark_hours":8.02,"moon_illumination":14,"moon_separation":95.3,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"22:10","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":5.83,"best_label":"good","best_window":"21:20\u201303:10","dark_hours":8.08,"date":"2032-09-09","moon_free_dark_hours":7.6,"moon_illumination":22,"moon_separation":85.5,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"22:05","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":5.92,"best_label":"good","best_window":"21:15\u201303:10","dark_hours":8.14,"date":"2032-09-10","moon_free_dark_hours":6.98,"moon_illumination":31,"moon_separation":75.5,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"22:00","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":5.83,"best_label":"good","best_window":"21:15\u201303:05","dark_hours":8.19,"date":"2032-09-11","moon_free_dark_hours":6.27,"moon_illumination":41,"moon_separation":65.6,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"22:00","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":5.83,"best_label":"good","best_window":"21:10\u201303:00","dark_hours":8.24,"date":"2032-09-12","moon_free_dark_hours":5.43,"moon_illumination":52,"moon_separation":56.0,"score":null,"score_astronomy":98,"score_weather":null,"transit_alt":71.1,"transit_local":"21:55","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":5.75,"best_label":"good","best_window":"21:10\u201302:55","dark_hours":8.3,"date":"2032-09-13","moon_free_dark_hours":4.47,"moon_illumination":62,"moon_separation":47.4,"score":null,"score_astronomy":91,"score_weather":null,"transit_alt":71.1,"transit_local":"21:50","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":5.67,"best_label":"good","best_window":"21:10\u201302:50","dark_hours":8.35,"date":"2032-09-14","moon_free_dark_hours":3.43,"moon_illumination":73,"moon_separation":40.6,"score":null,"score_astronomy":82,"score_weather":null,"transit_alt":71.1,"transit_local":"21:45","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":6.08,"best_label":"marginal","best_window":"21:05\u201303:10","dark_hours":8.4,"date":"2032-09-15","moon_free_dark_hours":2.28,"moon_illumination":83,"moon_separation":37.2,"score":null,"score_astronomy":45,"score_weather":null,"transit_alt":71.1,"transit_local":"21:40","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":5.83,"best_label":"marginal","best_window":"21:05\u201302:55","dark_hours":8.45,"date":"2032-09-16","moon_free_dark_hours":1.08,"moon_illumination":91,"moon_separation":38.5,"score":null,"score_astronomy":35,"score_weather":null,"transit_alt":71.1,"transit_local":"21:40","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":5.58,"best_label":"marginal","best_window":"21:05\u201302:40","dark_hours":8.51,"date":"2032-09-17","moon_free_dark_hours":0.0,"moon_illumination":97,"moon_separation":44.3,"score":null,"score_astronomy":34,"score_weather":null,"transit_alt":71.1,"transit_local":"21:35","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":5.58,"best_label":"marginal","best_window":"21:00\u201302:35","dark_hours":8.56,"date":"2032-09-18","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":53.3,"score":null,"score_astronomy":39,"score_weather":null,"transit_alt":71.1,"transit_local":"21:30","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":0.83,"best_label":"good","best_window":"21:00\u201321:50","dark_hours":8.61,"date":"2032-09-19","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":64.0,"score":null,"score_astronomy":50,"score_weather":null,"transit_alt":71.1,"transit_local":"21:25","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":2.83,"best_label":"good","best_window":"20:55\u201323:45","dark_hours":8.66,"date":"2032-09-20","moon_free_dark_hours":0.0,"moon_illumination":97,"moon_separation":75.4,"score":null,"score_astronomy":67,"score_weather":null,"transit_alt":71.1,"transit_local":"21:20","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":4.08,"best_label":"good","best_window":"20:55\u201301:00","dark_hours":8.71,"date":"2032-09-21","moon_free_dark_hours":0.0,"moon_illumination":91,"moon_separation":87.0,"score":null,"score_astronomy":81,"score_weather":null,"transit_alt":71.1,"transit_local":"21:20","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":5.0,"best_label":"good","best_window":"20:55\u201301:55","dark_hours":8.76,"date":"2032-09-22","moon_free_dark_hours":0.45,"moon_illumination":83,"moon_separation":98.3,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"21:15","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":5.25,"best_label":"good","best_window":"20:50\u201302:05","dark_hours":8.81,"date":"2032-09-23","moon_free_dark_hours":1.23,"moon_illumination":74,"moon_separation":109.0,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"21:10","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":5.25,"best_label":"good","best_window":"20:50\u201302:05","dark_hours":8.86,"date":"2032-09-24","moon_free_dark_hours":2.07,"moon_illumination":65,"moon_separation":118.9,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"21:05","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":5.25,"best_label":"good","best_window":"20:50\u201302:05","dark_hours":8.91,"date":"2032-09-25","moon_free_dark_hours":2.95,"moon_illumination":55,"moon_separation":127.8,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"21:05","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":5.25,"best_label":"good","best_window":"20:45\u201302:00","dark_hours":8.96,"date":"2032-09-26","moon_free_dark_hours":3.88,"moon_illumination":45,"moon_separation":135.1,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"21:00","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":5.25,"best_label":"good","best_window":"20:45\u201302:00","dark_hours":9.01,"date":"2032-09-27","moon_free_dark_hours":4.83,"moon_illumination":35,"moon_separation":140.4,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"20:55","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":5.25,"best_label":"good","best_window":"20:40\u201301:55","dark_hours":9.06,"date":"2032-09-28","moon_free_dark_hours":5.82,"moon_illumination":26,"moon_separation":142.9,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"20:50","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":5.25,"best_label":"good","best_window":"20:40\u201301:55","dark_hours":9.11,"date":"2032-09-29","moon_free_dark_hours":6.77,"moon_illumination":18,"moon_separation":142.2,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"20:45","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":5.17,"best_label":"good","best_window":"20:40\u201301:50","dark_hours":9.16,"date":"2032-09-30","moon_free_dark_hours":7.75,"moon_illumination":12,"moon_separation":138.5,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"20:45","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":5.17,"best_label":"good","best_window":"20:35\u201301:45","dark_hours":9.21,"date":"2032-10-01","moon_free_dark_hours":8.72,"moon_illumination":6,"moon_separation":132.6,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"20:40","verdict":"unknown","weather_source":"none","weekday":"Fri"}],"note":"score_astronomy for every night; score_weather/score only where a forecast (next 4 days) or ERA5 history exists \u2014 null otherwise","start":"2032-09-02","target":{"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}}