{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.51,"date":"2029-06-11","moon_free_dark_hours":4.5,"moon_illumination":0,"moon_separation":19.0,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":72.5,"transit_local":"11:45","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.49,"date":"2029-06-12","moon_free_dark_hours":4.47,"moon_illumination":1,"moon_separation":31.7,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":72.5,"transit_local":"11:40","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.48,"date":"2029-06-13","moon_free_dark_hours":4.45,"moon_illumination":3,"moon_separation":44.5,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":72.5,"transit_local":"11:35","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.46,"date":"2029-06-14","moon_free_dark_hours":4.45,"moon_illumination":8,"moon_separation":57.6,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":72.5,"transit_local":"11:35","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.45,"date":"2029-06-15","moon_free_dark_hours":4.3,"moon_illumination":15,"moon_separation":71.0,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":72.5,"transit_local":"11:30","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.44,"date":"2029-06-16","moon_free_dark_hours":3.8,"moon_illumination":24,"moon_separation":84.5,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":72.5,"transit_local":"11:25","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.43,"date":"2029-06-17","moon_free_dark_hours":3.33,"moon_illumination":34,"moon_separation":98.2,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":72.5,"transit_local":"11:20","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.43,"date":"2029-06-18","moon_free_dark_hours":2.9,"moon_illumination":44,"moon_separation":112.1,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":72.5,"transit_local":"11:20","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.42,"date":"2029-06-19","moon_free_dark_hours":2.43,"moon_illumination":56,"moon_separation":126.2,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":72.5,"transit_local":"11:15","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.42,"date":"2029-06-20","moon_free_dark_hours":1.93,"moon_illumination":67,"moon_separation":140.5,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":72.5,"transit_local":"11:10","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.42,"date":"2029-06-21","moon_free_dark_hours":1.37,"moon_illumination":78,"moon_separation":154.9,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":72.5,"transit_local":"11:05","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.43,"date":"2029-06-22","moon_free_dark_hours":0.7,"moon_illumination":87,"moon_separation":169.3,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":72.5,"transit_local":"11:00","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.43,"date":"2029-06-23","moon_free_dark_hours":0.0,"moon_illumination":94,"moon_separation":176.0,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":72.5,"transit_local":"11:00","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.44,"date":"2029-06-24","moon_free_dark_hours":0.0,"moon_illumination":98,"moon_separation":161.8,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":72.5,"transit_local":"10:55","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.45,"date":"2029-06-25","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":147.6,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":72.5,"transit_local":"10:50","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.46,"date":"2029-06-26","moon_free_dark_hours":0.0,"moon_illumination":99,"moon_separation":133.7,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":72.5,"transit_local":"10:45","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.47,"date":"2029-06-27","moon_free_dark_hours":0.0,"moon_illumination":96,"moon_separation":120.1,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":72.5,"transit_local":"10:40","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.49,"date":"2029-06-28","moon_free_dark_hours":0.0,"moon_illumination":91,"moon_separation":106.9,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":72.5,"transit_local":"10:40","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.5,"date":"2029-06-29","moon_free_dark_hours":0.0,"moon_illumination":84,"moon_separation":94.0,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":72.5,"transit_local":"10:35","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.52,"date":"2029-06-30","moon_free_dark_hours":0.4,"moon_illumination":76,"moon_separation":81.5,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":72.5,"transit_local":"10:30","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.54,"date":"2029-07-01","moon_free_dark_hours":0.8,"moon_illumination":67,"moon_separation":69.3,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":72.5,"transit_local":"10:25","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.57,"date":"2029-07-02","moon_free_dark_hours":1.18,"moon_illumination":58,"moon_separation":57.2,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":72.5,"transit_local":"10:25","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.59,"date":"2029-07-03","moon_free_dark_hours":1.6,"moon_illumination":48,"moon_separation":45.3,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":72.5,"transit_local":"10:20","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.62,"date":"2029-07-04","moon_free_dark_hours":2.02,"moon_illumination":39,"moon_separation":33.5,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":72.5,"transit_local":"10:15","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.65,"date":"2029-07-05","moon_free_dark_hours":2.52,"moon_illumination":30,"moon_separation":21.6,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":72.5,"transit_local":"10:10","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.68,"date":"2029-07-06","moon_free_dark_hours":3.1,"moon_illumination":21,"moon_separation":9.7,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":72.5,"transit_local":"10:05","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.71,"date":"2029-07-07","moon_free_dark_hours":3.78,"moon_illumination":14,"moon_separation":2.8,"score":null,"score_astronomy":1,"score_weather":null,"transit_alt":72.5,"transit_local":"10:05","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.74,"date":"2029-07-08","moon_free_dark_hours":4.58,"moon_illumination":8,"moon_separation":15.0,"score":null,"score_astronomy":1,"score_weather":null,"transit_alt":72.5,"transit_local":"10:00","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.77,"date":"2029-07-09","moon_free_dark_hours":4.75,"moon_illumination":3,"moon_separation":27.6,"score":null,"score_astronomy":1,"score_weather":null,"transit_alt":72.5,"transit_local":"09:55","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.81,"date":"2029-07-10","moon_free_dark_hours":4.78,"moon_illumination":1,"moon_separation":40.6,"score":null,"score_astronomy":1,"score_weather":null,"transit_alt":72.5,"transit_local":"09:50","verdict":"unknown","weather_source":"none","weekday":"Tue"}],"note":"score_astronomy for every night; score_weather/score only where a forecast (next 4 days) or ERA5 history exists \u2014 null otherwise","start":"2029-06-11","target":{"common_name":"Seven Sisters","dec":24.11388889,"name":"Cl Melotte 22","ra":56.60083333,"simbad_url":"https://simbad.cds.unistra.fr/simbad/sim-id?Ident=M45","source":"sesame","type":"OpC","type_text":"open cluster"}}