{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":4.5,"best_label":"good","best_window":"23:10\u201303:40","dark_hours":4.46,"date":"2042-06-14","moon_free_dark_hours":4.45,"moon_illumination":11,"moon_separation":94.0,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"03:50","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":4.5,"best_label":"good","best_window":"23:10\u201303:40","dark_hours":4.45,"date":"2042-06-15","moon_free_dark_hours":4.43,"moon_illumination":5,"moon_separation":103.6,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"03:45","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":4.5,"best_label":"good","best_window":"23:10\u201303:40","dark_hours":4.44,"date":"2042-06-16","moon_free_dark_hours":4.43,"moon_illumination":1,"moon_separation":112.6,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"03:40","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":4.5,"best_label":"good","best_window":"23:10\u201303:40","dark_hours":4.43,"date":"2042-06-17","moon_free_dark_hours":4.42,"moon_illumination":0,"moon_separation":120.6,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"03:40","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":4.5,"best_label":"good","best_window":"23:10\u201303:40","dark_hours":4.43,"date":"2042-06-18","moon_free_dark_hours":4.42,"moon_illumination":2,"moon_separation":127.0,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"03:35","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":4.5,"best_label":"good","best_window":"23:10\u201303:40","dark_hours":4.42,"date":"2042-06-19","moon_free_dark_hours":4.42,"moon_illumination":6,"moon_separation":131.2,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"03:30","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":4.42,"best_label":"good","best_window":"23:15\u201303:40","dark_hours":4.42,"date":"2042-06-20","moon_free_dark_hours":4.03,"moon_illumination":11,"moon_separation":132.9,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"03:25","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":4.42,"best_label":"good","best_window":"23:15\u201303:40","dark_hours":4.42,"date":"2042-06-21","moon_free_dark_hours":3.53,"moon_illumination":18,"moon_separation":132.0,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"03:20","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":4.42,"best_label":"good","best_window":"23:15\u201303:40","dark_hours":4.42,"date":"2042-06-22","moon_free_dark_hours":3.12,"moon_illumination":26,"moon_separation":128.7,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"03:20","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":4.42,"best_label":"good","best_window":"23:15\u201303:40","dark_hours":4.43,"date":"2042-06-23","moon_free_dark_hours":2.78,"moon_illumination":36,"moon_separation":123.7,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"03:15","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":4.42,"best_label":"good","best_window":"23:15\u201303:40","dark_hours":4.44,"date":"2042-06-24","moon_free_dark_hours":2.47,"moon_illumination":45,"moon_separation":117.4,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"03:10","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":4.42,"best_label":"good","best_window":"23:15\u201303:40","dark_hours":4.44,"date":"2042-06-25","moon_free_dark_hours":2.17,"moon_illumination":54,"moon_separation":110.3,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"03:05","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":4.42,"best_label":"good","best_window":"23:15\u201303:40","dark_hours":4.46,"date":"2042-06-26","moon_free_dark_hours":1.87,"moon_illumination":64,"moon_separation":102.7,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"03:05","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":4.42,"best_label":"good","best_window":"23:15\u201303:40","dark_hours":4.47,"date":"2042-06-27","moon_free_dark_hours":1.55,"moon_illumination":72,"moon_separation":94.7,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"03:00","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":4.42,"best_label":"good","best_window":"23:15\u201303:40","dark_hours":4.48,"date":"2042-06-28","moon_free_dark_hours":1.17,"moon_illumination":81,"moon_separation":86.4,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"02:55","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":4.5,"best_label":"good","best_window":"23:10\u201303:40","dark_hours":4.5,"date":"2042-06-29","moon_free_dark_hours":0.7,"moon_illumination":88,"moon_separation":78.2,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"02:50","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":4.25,"best_label":"good","best_window":"23:30\u201303:45","dark_hours":4.52,"date":"2042-06-30","moon_free_dark_hours":0.13,"moon_illumination":94,"moon_separation":70.0,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"02:45","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":3.5,"best_label":"good","best_window":"00:15\u201303:45","dark_hours":4.54,"date":"2042-07-01","moon_free_dark_hours":0.0,"moon_illumination":98,"moon_separation":62.3,"score":null,"score_astronomy":63,"score_weather":null,"transit_alt":71.1,"transit_local":"02:45","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":1.42,"best_label":"good","best_window":"02:20\u201303:45","dark_hours":4.56,"date":"2042-07-02","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":55.5,"score":null,"score_astronomy":53,"score_weather":null,"transit_alt":71.1,"transit_local":"02:40","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":4.58,"best_label":"marginal","best_window":"23:10\u201303:45","dark_hours":4.59,"date":"2042-07-03","moon_free_dark_hours":0.0,"moon_illumination":99,"moon_separation":50.3,"score":null,"score_astronomy":46,"score_weather":null,"transit_alt":71.1,"transit_local":"02:35","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":4.58,"best_label":"marginal","best_window":"23:10\u201303:45","dark_hours":4.61,"date":"2042-07-04","moon_free_dark_hours":0.0,"moon_illumination":97,"moon_separation":47.4,"score":null,"score_astronomy":47,"score_weather":null,"transit_alt":71.1,"transit_local":"02:30","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":2.0,"best_label":"good","best_window":"23:10\u201301:10","dark_hours":4.64,"date":"2042-07-05","moon_free_dark_hours":0.02,"moon_illumination":92,"moon_separation":47.4,"score":null,"score_astronomy":54,"score_weather":null,"transit_alt":71.1,"transit_local":"02:25","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":3.58,"best_label":"good","best_window":"23:10\u201302:45","dark_hours":4.67,"date":"2042-07-06","moon_free_dark_hours":0.53,"moon_illumination":84,"moon_separation":50.5,"score":null,"score_astronomy":90,"score_weather":null,"transit_alt":71.1,"transit_local":"02:25","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":4.67,"best_label":"good","best_window":"23:10\u201303:50","dark_hours":4.7,"date":"2042-07-07","moon_free_dark_hours":0.95,"moon_illumination":75,"moon_separation":56.2,"score":null,"score_astronomy":97,"score_weather":null,"transit_alt":71.1,"transit_local":"02:20","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":4.75,"best_label":"good","best_window":"23:05\u201303:50","dark_hours":4.73,"date":"2042-07-08","moon_free_dark_hours":1.35,"moon_illumination":65,"moon_separation":63.7,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"02:15","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":4.75,"best_label":"good","best_window":"23:05\u201303:50","dark_hours":4.77,"date":"2042-07-09","moon_free_dark_hours":1.75,"moon_illumination":54,"moon_separation":72.4,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"02:10","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":4.83,"best_label":"good","best_window":"23:05\u201303:55","dark_hours":4.8,"date":"2042-07-10","moon_free_dark_hours":2.17,"moon_illumination":42,"moon_separation":81.8,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"02:10","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":4.83,"best_label":"good","best_window":"23:05\u201303:55","dark_hours":4.84,"date":"2042-07-11","moon_free_dark_hours":2.63,"moon_illumination":31,"moon_separation":91.3,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"02:05","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":4.83,"best_label":"good","best_window":"23:05\u201303:55","dark_hours":4.88,"date":"2042-07-12","moon_free_dark_hours":3.2,"moon_illumination":21,"moon_separation":100.8,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"02:00","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":4.92,"best_label":"good","best_window":"23:00\u201303:55","dark_hours":4.92,"date":"2042-07-13","moon_free_dark_hours":3.87,"moon_illumination":13,"moon_separation":109.9,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"01:55","verdict":"unknown","weather_source":"none","weekday":"Sun"}],"note":"score_astronomy for every night; score_weather/score only where a forecast (next 4 days) or ERA5 history exists \u2014 null otherwise","start":"2042-06-14","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}}