{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":3.17,"best_label":"good","best_window":"20:20\u201323:30","dark_hours":9.62,"date":"2041-10-10","moon_free_dark_hours":0.0,"moon_illumination":98,"moon_separation":86.7,"score":null,"score_astronomy":68,"score_weather":null,"transit_alt":71.1,"transit_local":"20:05","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":4.08,"best_label":"good","best_window":"20:20\u201300:25","dark_hours":9.66,"date":"2041-10-11","moon_free_dark_hours":0.0,"moon_illumination":94,"moon_separation":96.5,"score":null,"score_astronomy":81,"score_weather":null,"transit_alt":71.1,"transit_local":"20:00","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":4.42,"best_label":"good","best_window":"20:20\u201300:45","dark_hours":9.71,"date":"2041-10-12","moon_free_dark_hours":0.12,"moon_illumination":87,"moon_separation":105.7,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"19:55","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":4.58,"best_label":"good","best_window":"20:15\u201300:50","dark_hours":9.75,"date":"2041-10-13","moon_free_dark_hours":0.82,"moon_illumination":78,"moon_separation":114.2,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"19:55","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":4.58,"best_label":"good","best_window":"20:15\u201300:50","dark_hours":9.79,"date":"2041-10-14","moon_free_dark_hours":1.62,"moon_illumination":69,"moon_separation":121.4,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"19:50","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":4.5,"best_label":"good","best_window":"20:15\u201300:45","dark_hours":9.84,"date":"2041-10-15","moon_free_dark_hours":2.57,"moon_illumination":60,"moon_separation":127.1,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"19:45","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":4.5,"best_label":"good","best_window":"20:15\u201300:45","dark_hours":9.88,"date":"2041-10-16","moon_free_dark_hours":3.58,"moon_illumination":50,"moon_separation":130.9,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"19:40","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":4.58,"best_label":"good","best_window":"20:10\u201300:45","dark_hours":9.92,"date":"2041-10-17","moon_free_dark_hours":4.67,"moon_illumination":40,"moon_separation":132.5,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"19:35","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":4.5,"best_label":"good","best_window":"20:10\u201300:40","dark_hours":9.97,"date":"2041-10-18","moon_free_dark_hours":5.73,"moon_illumination":31,"moon_separation":131.8,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"19:35","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":4.42,"best_label":"good","best_window":"20:10\u201300:35","dark_hours":10.01,"date":"2041-10-19","moon_free_dark_hours":6.82,"moon_illumination":22,"moon_separation":129.0,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"19:30","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":4.42,"best_label":"good","best_window":"20:05\u201300:30","dark_hours":10.05,"date":"2041-10-20","moon_free_dark_hours":7.85,"moon_illumination":15,"moon_separation":124.5,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"19:25","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":4.42,"best_label":"good","best_window":"20:05\u201300:30","dark_hours":10.09,"date":"2041-10-21","moon_free_dark_hours":8.88,"moon_illumination":9,"moon_separation":118.6,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"19:20","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":4.33,"best_label":"good","best_window":"20:05\u201300:25","dark_hours":10.13,"date":"2041-10-22","moon_free_dark_hours":9.93,"moon_illumination":4,"moon_separation":111.6,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"19:20","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":4.25,"best_label":"good","best_window":"20:05\u201300:20","dark_hours":10.17,"date":"2041-10-23","moon_free_dark_hours":10.15,"moon_illumination":1,"moon_separation":104.0,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"19:15","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":4.25,"best_label":"good","best_window":"20:00\u201300:15","dark_hours":10.21,"date":"2041-10-24","moon_free_dark_hours":10.18,"moon_illumination":0,"moon_separation":95.9,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"19:10","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":4.17,"best_label":"good","best_window":"20:00\u201300:10","dark_hours":10.25,"date":"2041-10-25","moon_free_dark_hours":10.23,"moon_illumination":1,"moon_separation":87.5,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"19:05","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":4.17,"best_label":"good","best_window":"20:00\u201300:10","dark_hours":10.29,"date":"2041-10-26","moon_free_dark_hours":10.27,"moon_illumination":3,"moon_separation":79.1,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"19:00","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":4.08,"best_label":"good","best_window":"19:00\u201323:05","dark_hours":10.33,"date":"2041-10-27","moon_free_dark_hours":10.3,"moon_illumination":8,"moon_separation":70.8,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"18:00","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":4.08,"best_label":"good","best_window":"18:55\u201323:00","dark_hours":10.37,"date":"2041-10-28","moon_free_dark_hours":10.13,"moon_illumination":15,"moon_separation":63.1,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"17:55","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":4.0,"best_label":"good","best_window":"18:55\u201322:55","dark_hours":10.4,"date":"2041-10-29","moon_free_dark_hours":9.33,"moon_illumination":23,"moon_separation":56.2,"score":null,"score_astronomy":98,"score_weather":null,"transit_alt":71.1,"transit_local":"17:50","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":4.0,"best_label":"good","best_window":"18:55\u201322:55","dark_hours":10.44,"date":"2041-10-30","moon_free_dark_hours":8.33,"moon_illumination":33,"moon_separation":51.0,"score":null,"score_astronomy":87,"score_weather":null,"transit_alt":71.1,"transit_local":"17:45","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":3.92,"best_label":"good","best_window":"18:55\u201322:50","dark_hours":10.48,"date":"2041-10-31","moon_free_dark_hours":7.18,"moon_illumination":44,"moon_separation":47.9,"score":null,"score_astronomy":70,"score_weather":null,"transit_alt":71.1,"transit_local":"17:40","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":3.58,"best_label":"good","best_window":"18:50\u201322:25","dark_hours":10.51,"date":"2041-11-01","moon_free_dark_hours":5.95,"moon_illumination":55,"moon_separation":47.8,"score":null,"score_astronomy":57,"score_weather":null,"transit_alt":71.1,"transit_local":"17:40","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":2.42,"best_label":"good","best_window":"18:50\u201321:15","dark_hours":10.55,"date":"2041-11-02","moon_free_dark_hours":4.67,"moon_illumination":66,"moon_separation":50.7,"score":null,"score_astronomy":47,"score_weather":null,"transit_alt":71.1,"transit_local":"17:35","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":1.25,"best_label":"good","best_window":"18:50\u201320:05","dark_hours":10.59,"date":"2041-11-03","moon_free_dark_hours":3.4,"moon_illumination":76,"moon_separation":56.3,"score":null,"score_astronomy":41,"score_weather":null,"transit_alt":71.1,"transit_local":"17:30","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":0.83,"best_label":"good","best_window":"18:50\u201319:40","dark_hours":10.62,"date":"2041-11-04","moon_free_dark_hours":2.15,"moon_illumination":86,"moon_separation":63.9,"score":null,"score_astronomy":38,"score_weather":null,"transit_alt":71.1,"transit_local":"17:25","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":1.0,"best_label":"good","best_window":"18:50\u201319:50","dark_hours":10.66,"date":"2041-11-05","moon_free_dark_hours":0.9,"moon_illumination":93,"moon_separation":72.8,"score":null,"score_astronomy":39,"score_weather":null,"transit_alt":71.1,"transit_local":"17:25","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":1.58,"best_label":"good","best_window":"18:45\u201320:20","dark_hours":10.69,"date":"2041-11-06","moon_free_dark_hours":0.0,"moon_illumination":98,"moon_separation":82.4,"score":null,"score_astronomy":44,"score_weather":null,"transit_alt":71.1,"transit_local":"17:20","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":2.25,"best_label":"good","best_window":"18:45\u201321:00","dark_hours":10.72,"date":"2041-11-07","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":92.2,"score":null,"score_astronomy":51,"score_weather":null,"transit_alt":71.1,"transit_local":"17:15","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":3.08,"best_label":"good","best_window":"18:45\u201321:50","dark_hours":10.76,"date":"2041-11-08","moon_free_dark_hours":0.0,"moon_illumination":99,"moon_separation":101.7,"score":null,"score_astronomy":60,"score_weather":null,"transit_alt":71.1,"transit_local":"17:10","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":"2041-10-10","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}}
