{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":4.83,"best_label":"good","best_window":"20:20\u201301:10","dark_hours":9.62,"date":"2045-10-10","moon_free_dark_hours":9.6,"moon_illumination":0,"moon_separation":103.6,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"20:05","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":4.75,"best_label":"good","best_window":"20:20\u201301:05","dark_hours":9.66,"date":"2045-10-11","moon_free_dark_hours":9.65,"moon_illumination":3,"moon_separation":93.3,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"20:00","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":4.75,"best_label":"good","best_window":"20:20\u201301:05","dark_hours":9.71,"date":"2045-10-12","moon_free_dark_hours":9.68,"moon_illumination":8,"moon_separation":83.2,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"19:55","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":4.75,"best_label":"good","best_window":"20:15\u201301:00","dark_hours":9.75,"date":"2045-10-13","moon_free_dark_hours":9.73,"moon_illumination":15,"moon_separation":73.5,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"19:55","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":4.67,"best_label":"good","best_window":"20:15\u201300:55","dark_hours":9.79,"date":"2045-10-14","moon_free_dark_hours":9.15,"moon_illumination":23,"moon_separation":64.6,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"19:50","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":4.58,"best_label":"good","best_window":"20:15\u201300:50","dark_hours":9.84,"date":"2045-10-15","moon_free_dark_hours":8.25,"moon_illumination":32,"moon_separation":56.8,"score":null,"score_astronomy":99,"score_weather":null,"transit_alt":71.1,"transit_local":"19:45","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":4.58,"best_label":"good","best_window":"20:15\u201300:50","dark_hours":9.88,"date":"2045-10-16","moon_free_dark_hours":7.25,"moon_illumination":42,"moon_separation":50.3,"score":null,"score_astronomy":91,"score_weather":null,"transit_alt":71.1,"transit_local":"19:40","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":4.58,"best_label":"good","best_window":"20:10\u201300:45","dark_hours":9.92,"date":"2045-10-17","moon_free_dark_hours":6.22,"moon_illumination":51,"moon_separation":45.6,"score":null,"score_astronomy":79,"score_weather":null,"transit_alt":71.1,"transit_local":"19:35","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":4.08,"best_label":"good","best_window":"20:10\u201300:15","dark_hours":9.97,"date":"2045-10-18","moon_free_dark_hours":5.17,"moon_illumination":61,"moon_separation":43.2,"score":null,"score_astronomy":58,"score_weather":null,"transit_alt":71.1,"transit_local":"19:35","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":2.0,"best_label":"good","best_window":"20:10\u201322:10","dark_hours":10.01,"date":"2045-10-19","moon_free_dark_hours":4.13,"moon_illumination":70,"moon_separation":43.4,"score":null,"score_astronomy":47,"score_weather":null,"transit_alt":71.1,"transit_local":"19:30","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":4.75,"best_label":"marginal","best_window":"20:05\u201300:50","dark_hours":10.05,"date":"2045-10-20","moon_free_dark_hours":3.13,"moon_illumination":78,"moon_separation":46.1,"score":null,"score_astronomy":40,"score_weather":null,"transit_alt":71.1,"transit_local":"19:25","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":4.58,"best_label":"marginal","best_window":"20:05\u201300:40","dark_hours":10.09,"date":"2045-10-21","moon_free_dark_hours":2.12,"moon_illumination":85,"moon_separation":50.9,"score":null,"score_astronomy":35,"score_weather":null,"transit_alt":71.1,"transit_local":"19:20","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":4.42,"best_label":"marginal","best_window":"20:05\u201300:30","dark_hours":10.13,"date":"2045-10-22","moon_free_dark_hours":1.12,"moon_illumination":91,"moon_separation":57.4,"score":null,"score_astronomy":34,"score_weather":null,"transit_alt":71.1,"transit_local":"19:20","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":4.33,"best_label":"marginal","best_window":"20:05\u201300:25","dark_hours":10.17,"date":"2045-10-23","moon_free_dark_hours":0.08,"moon_illumination":96,"moon_separation":65.1,"score":null,"score_astronomy":36,"score_weather":null,"transit_alt":71.1,"transit_local":"19:15","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":1.17,"best_label":"good","best_window":"20:00\u201321:10","dark_hours":10.21,"date":"2045-10-24","moon_free_dark_hours":0.0,"moon_illumination":99,"moon_separation":73.6,"score":null,"score_astronomy":42,"score_weather":null,"transit_alt":71.1,"transit_local":"19:10","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":1.92,"best_label":"good","best_window":"20:00\u201321:55","dark_hours":10.25,"date":"2045-10-25","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":82.6,"score":null,"score_astronomy":50,"score_weather":null,"transit_alt":71.1,"transit_local":"19:05","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":2.83,"best_label":"good","best_window":"20:00\u201322:50","dark_hours":10.29,"date":"2045-10-26","moon_free_dark_hours":0.0,"moon_illumination":99,"moon_separation":92.1,"score":null,"score_astronomy":60,"score_weather":null,"transit_alt":71.1,"transit_local":"19:00","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":3.67,"best_label":"good","best_window":"20:00\u201323:40","dark_hours":10.33,"date":"2045-10-27","moon_free_dark_hours":0.0,"moon_illumination":95,"moon_separation":101.6,"score":null,"score_astronomy":71,"score_weather":null,"transit_alt":71.1,"transit_local":"19:00","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":3.83,"best_label":"good","best_window":"19:55\u201323:45","dark_hours":10.37,"date":"2045-10-28","moon_free_dark_hours":0.0,"moon_illumination":90,"moon_separation":111.0,"score":null,"score_astronomy":83,"score_weather":null,"transit_alt":71.1,"transit_local":"18:55","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":3.92,"best_label":"good","best_window":"18:55\u201322:50","dark_hours":10.41,"date":"2045-10-29","moon_free_dark_hours":0.7,"moon_illumination":82,"moon_separation":119.9,"score":null,"score_astronomy":98,"score_weather":null,"transit_alt":71.1,"transit_local":"17:50","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":3.83,"best_label":"good","best_window":"18:55\u201322:45","dark_hours":10.44,"date":"2045-10-30","moon_free_dark_hours":1.8,"moon_illumination":73,"moon_separation":127.7,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"17:45","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":3.83,"best_label":"good","best_window":"18:55\u201322:45","dark_hours":10.48,"date":"2045-10-31","moon_free_dark_hours":3.0,"moon_illumination":63,"moon_separation":133.6,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"17:40","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":3.92,"best_label":"good","best_window":"18:50\u201322:45","dark_hours":10.52,"date":"2045-11-01","moon_free_dark_hours":4.27,"moon_illumination":52,"moon_separation":136.8,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"17:40","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":3.83,"best_label":"good","best_window":"18:50\u201322:40","dark_hours":10.55,"date":"2045-11-02","moon_free_dark_hours":5.55,"moon_illumination":41,"moon_separation":136.5,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"17:35","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":3.75,"best_label":"good","best_window":"18:50\u201322:35","dark_hours":10.59,"date":"2045-11-03","moon_free_dark_hours":6.82,"moon_illumination":30,"moon_separation":132.6,"score":null,"score_astronomy":99,"score_weather":null,"transit_alt":71.1,"transit_local":"17:30","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":3.75,"best_label":"good","best_window":"18:50\u201322:35","dark_hours":10.62,"date":"2045-11-04","moon_free_dark_hours":8.07,"moon_illumination":20,"moon_separation":125.8,"score":null,"score_astronomy":98,"score_weather":null,"transit_alt":71.1,"transit_local":"17:25","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":3.67,"best_label":"good","best_window":"18:50\u201322:30","dark_hours":10.66,"date":"2045-11-05","moon_free_dark_hours":9.32,"moon_illumination":11,"moon_separation":117.3,"score":null,"score_astronomy":96,"score_weather":null,"transit_alt":71.1,"transit_local":"17:25","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":3.67,"best_label":"good","best_window":"18:45\u201322:25","dark_hours":10.69,"date":"2045-11-06","moon_free_dark_hours":10.58,"moon_illumination":5,"moon_separation":107.6,"score":null,"score_astronomy":95,"score_weather":null,"transit_alt":71.1,"transit_local":"17:20","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":3.58,"best_label":"good","best_window":"18:45\u201322:20","dark_hours":10.72,"date":"2045-11-07","moon_free_dark_hours":10.7,"moon_illumination":1,"moon_separation":97.5,"score":null,"score_astronomy":94,"score_weather":null,"transit_alt":71.1,"transit_local":"17:15","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":3.5,"best_label":"good","best_window":"18:45\u201322:15","dark_hours":10.76,"date":"2045-11-08","moon_free_dark_hours":10.73,"moon_illumination":0,"moon_separation":87.3,"score":null,"score_astronomy":93,"score_weather":null,"transit_alt":71.1,"transit_local":"17:10","verdict":"unknown","weather_source":"none","weekday":"Wed"}],"note":"score_astronomy for every night; score_weather/score only where a forecast (next 4 days) or ERA5 history exists \u2014 null otherwise","start":"2045-10-10","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}}