{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.96,"date":"2035-05-28","moon_free_dark_hours":2.53,"moon_illumination":64,"moon_separation":98.1,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":72.5,"transit_local":"12:45","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.92,"date":"2035-05-29","moon_free_dark_hours":3.07,"moon_illumination":54,"moon_separation":85.8,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":72.5,"transit_local":"12:45","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.88,"date":"2035-05-30","moon_free_dark_hours":3.57,"moon_illumination":44,"moon_separation":73.2,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":72.5,"transit_local":"12:40","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.84,"date":"2035-05-31","moon_free_dark_hours":4.08,"moon_illumination":33,"moon_separation":60.3,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":72.5,"transit_local":"12:35","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.8,"date":"2035-06-01","moon_free_dark_hours":4.62,"moon_illumination":24,"moon_separation":46.9,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":72.5,"transit_local":"12:30","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.77,"date":"2035-06-02","moon_free_dark_hours":4.77,"moon_illumination":15,"moon_separation":33.3,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":72.5,"transit_local":"12:25","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.73,"date":"2035-06-03","moon_free_dark_hours":4.72,"moon_illumination":7,"moon_separation":19.7,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":72.5,"transit_local":"12:25","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.7,"date":"2035-06-04","moon_free_dark_hours":4.68,"moon_illumination":2,"moon_separation":9.4,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":72.5,"transit_local":"12:20","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.67,"date":"2035-06-05","moon_free_dark_hours":4.65,"moon_illumination":0,"moon_separation":15.3,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":72.5,"transit_local":"12:15","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.64,"date":"2035-06-06","moon_free_dark_hours":4.62,"moon_illumination":1,"moon_separation":29.0,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":72.5,"transit_local":"12:10","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.61,"date":"2035-06-07","moon_free_dark_hours":4.6,"moon_illumination":5,"moon_separation":43.6,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":72.5,"transit_local":"12:05","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.59,"date":"2035-06-08","moon_free_dark_hours":4.57,"moon_illumination":12,"moon_separation":58.2,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":72.5,"transit_local":"12:00","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.56,"date":"2035-06-09","moon_free_dark_hours":3.77,"moon_illumination":20,"moon_separation":72.6,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":72.5,"transit_local":"11:55","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.54,"date":"2035-06-10","moon_free_dark_hours":3.05,"moon_illumination":30,"moon_separation":86.5,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":72.5,"transit_local":"11:50","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.52,"date":"2035-06-11","moon_free_dark_hours":2.45,"moon_illumination":40,"moon_separation":100.0,"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":4.5,"date":"2035-06-12","moon_free_dark_hours":1.88,"moon_illumination":51,"moon_separation":113.1,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":72.5,"transit_local":"11:45","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.48,"date":"2035-06-13","moon_free_dark_hours":1.37,"moon_illumination":61,"moon_separation":125.8,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":72.5,"transit_local":"11:40","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.47,"date":"2035-06-14","moon_free_dark_hours":0.87,"moon_illumination":71,"moon_separation":138.1,"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":4.46,"date":"2035-06-15","moon_free_dark_hours":0.37,"moon_illumination":79,"moon_separation":149.9,"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":"2035-06-16","moon_free_dark_hours":0.0,"moon_illumination":87,"moon_separation":161.1,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":72.5,"transit_local":"11:30","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.44,"date":"2035-06-17","moon_free_dark_hours":0.0,"moon_illumination":92,"moon_separation":169.8,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":72.5,"transit_local":"11:25","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.43,"date":"2035-06-18","moon_free_dark_hours":0.0,"moon_illumination":97,"moon_separation":168.4,"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":4.43,"date":"2035-06-19","moon_free_dark_hours":0.0,"moon_illumination":99,"moon_separation":158.9,"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":"2035-06-20","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":147.9,"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":"2035-06-21","moon_free_dark_hours":0.0,"moon_illumination":99,"moon_separation":136.5,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":72.5,"transit_local":"11:10","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.42,"date":"2035-06-22","moon_free_dark_hours":0.0,"moon_illumination":96,"moon_separation":124.8,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":72.5,"transit_local":"11:05","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.43,"date":"2035-06-23","moon_free_dark_hours":0.0,"moon_illumination":91,"moon_separation":113.0,"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":4.43,"date":"2035-06-24","moon_free_dark_hours":0.22,"moon_illumination":85,"moon_separation":101.1,"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":4.44,"date":"2035-06-25","moon_free_dark_hours":0.78,"moon_illumination":78,"moon_separation":89.0,"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":4.45,"date":"2035-06-26","moon_free_dark_hours":1.32,"moon_illumination":69,"moon_separation":76.7,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":72.5,"transit_local":"10:50","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":"2035-05-28","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"}}