{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":2.92,"best_label":"good","best_window":"19:15\u201322:10","dark_hours":10.69,"date":"2034-02-03","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":81.9,"score":null,"score_astronomy":65,"score_weather":null,"transit_alt":72.5,"transit_local":"19:15","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":4.08,"best_label":"good","best_window":"19:20\u201323:25","dark_hours":10.65,"date":"2034-02-04","moon_free_dark_hours":0.0,"moon_illumination":98,"moon_separation":94.6,"score":null,"score_astronomy":83,"score_weather":null,"transit_alt":72.5,"transit_local":"19:10","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":4.58,"best_label":"good","best_window":"19:20\u201323:55","dark_hours":10.62,"date":"2034-02-05","moon_free_dark_hours":0.82,"moon_illumination":94,"moon_separation":107.0,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"19:05","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":4.75,"best_label":"good","best_window":"19:20\u201300:05","dark_hours":10.58,"date":"2034-02-06","moon_free_dark_hours":1.78,"moon_illumination":88,"moon_separation":119.2,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"19:00","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":4.67,"best_label":"good","best_window":"19:20\u201300:00","dark_hours":10.55,"date":"2034-02-07","moon_free_dark_hours":2.73,"moon_illumination":81,"moon_separation":131.1,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"19:00","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":4.67,"best_label":"good","best_window":"19:20\u201300:00","dark_hours":10.51,"date":"2034-02-08","moon_free_dark_hours":3.67,"moon_illumination":73,"moon_separation":142.7,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"18:55","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":4.58,"best_label":"good","best_window":"19:25\u201300:00","dark_hours":10.47,"date":"2034-02-09","moon_free_dark_hours":4.6,"moon_illumination":64,"moon_separation":154.1,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"18:50","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":4.5,"best_label":"good","best_window":"19:25\u201323:55","dark_hours":10.44,"date":"2034-02-10","moon_free_dark_hours":5.52,"moon_illumination":55,"moon_separation":164.8,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"18:45","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":4.5,"best_label":"good","best_window":"19:25\u201323:55","dark_hours":10.4,"date":"2034-02-11","moon_free_dark_hours":6.42,"moon_illumination":46,"moon_separation":171.6,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"18:40","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":4.42,"best_label":"good","best_window":"19:25\u201323:50","dark_hours":10.36,"date":"2034-02-12","moon_free_dark_hours":7.3,"moon_illumination":36,"moon_separation":166.0,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"18:40","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":4.25,"best_label":"good","best_window":"19:30\u201323:45","dark_hours":10.32,"date":"2034-02-13","moon_free_dark_hours":8.15,"moon_illumination":27,"moon_separation":155.1,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"18:35","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":4.17,"best_label":"good","best_window":"19:30\u201323:40","dark_hours":10.28,"date":"2034-02-14","moon_free_dark_hours":8.98,"moon_illumination":18,"moon_separation":143.0,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"18:30","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":4.08,"best_label":"good","best_window":"19:30\u201323:35","dark_hours":10.24,"date":"2034-02-15","moon_free_dark_hours":9.75,"moon_illumination":11,"moon_separation":130.3,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"18:25","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":4.08,"best_label":"good","best_window":"19:30\u201323:35","dark_hours":10.2,"date":"2034-02-16","moon_free_dark_hours":10.18,"moon_illumination":5,"moon_separation":117.1,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"18:25","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":4.0,"best_label":"good","best_window":"19:30\u201323:30","dark_hours":10.16,"date":"2034-02-17","moon_free_dark_hours":10.15,"moon_illumination":2,"moon_separation":103.5,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"18:20","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":3.83,"best_label":"good","best_window":"19:35\u201323:25","dark_hours":10.12,"date":"2034-02-18","moon_free_dark_hours":10.12,"moon_illumination":0,"moon_separation":89.5,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"18:15","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":3.75,"best_label":"good","best_window":"19:35\u201323:20","dark_hours":10.08,"date":"2034-02-19","moon_free_dark_hours":10.05,"moon_illumination":1,"moon_separation":75.3,"score":null,"score_astronomy":99,"score_weather":null,"transit_alt":72.5,"transit_local":"18:10","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":3.75,"best_label":"good","best_window":"19:35\u201323:20","dark_hours":10.04,"date":"2034-02-20","moon_free_dark_hours":9.68,"moon_illumination":5,"moon_separation":60.9,"score":null,"score_astronomy":97,"score_weather":null,"transit_alt":72.5,"transit_local":"18:05","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":3.67,"best_label":"good","best_window":"19:35\u201323:15","dark_hours":10.0,"date":"2034-02-21","moon_free_dark_hours":8.48,"moon_illumination":12,"moon_separation":46.6,"score":null,"score_astronomy":88,"score_weather":null,"transit_alt":72.5,"transit_local":"18:05","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":3.5,"best_label":"good","best_window":"19:40\u201323:10","dark_hours":9.95,"date":"2034-02-22","moon_free_dark_hours":7.27,"moon_illumination":20,"moon_separation":32.4,"score":null,"score_astronomy":75,"score_weather":null,"transit_alt":72.5,"transit_local":"18:00","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":3.25,"best_label":"good","best_window":"19:40\u201322:55","dark_hours":9.91,"date":"2034-02-23","moon_free_dark_hours":6.08,"moon_illumination":30,"moon_separation":18.9,"score":null,"score_astronomy":61,"score_weather":null,"transit_alt":72.5,"transit_local":"17:55","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":3.0,"best_label":"good","best_window":"19:40\u201322:40","dark_hours":9.87,"date":"2034-02-24","moon_free_dark_hours":4.93,"moon_illumination":42,"moon_separation":8.9,"score":null,"score_astronomy":46,"score_weather":null,"transit_alt":72.5,"transit_local":"17:50","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":0.33,"best_label":"good","best_window":"19:40\u201320:00","dark_hours":9.82,"date":"2034-02-25","moon_free_dark_hours":3.83,"moon_illumination":53,"moon_separation":14.1,"score":null,"score_astronomy":33,"score_weather":null,"transit_alt":72.5,"transit_local":"17:45","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":3.33,"best_label":"marginal","best_window":"19:45\u201323:05","dark_hours":9.78,"date":"2034-02-26","moon_free_dark_hours":2.82,"moon_illumination":64,"moon_separation":26.3,"score":null,"score_astronomy":23,"score_weather":null,"transit_alt":72.5,"transit_local":"17:45","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":3.17,"best_label":"marginal","best_window":"19:45\u201322:55","dark_hours":9.73,"date":"2034-02-27","moon_free_dark_hours":1.9,"moon_illumination":74,"moon_separation":39.3,"score":null,"score_astronomy":19,"score_weather":null,"transit_alt":72.5,"transit_local":"17:40","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":3.08,"best_label":"marginal","best_window":"19:45\u201322:50","dark_hours":9.69,"date":"2034-02-28","moon_free_dark_hours":1.07,"moon_illumination":83,"moon_separation":52.4,"score":null,"score_astronomy":20,"score_weather":null,"transit_alt":72.5,"transit_local":"17:35","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":3.08,"best_label":"marginal","best_window":"19:45\u201322:50","dark_hours":9.64,"date":"2034-03-01","moon_free_dark_hours":0.35,"moon_illumination":90,"moon_separation":65.3,"score":null,"score_astronomy":23,"score_weather":null,"transit_alt":72.5,"transit_local":"17:30","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":0.42,"best_label":"good","best_window":"19:45\u201320:10","dark_hours":9.6,"date":"2034-03-02","moon_free_dark_hours":0.0,"moon_illumination":95,"moon_separation":78.1,"score":null,"score_astronomy":29,"score_weather":null,"transit_alt":72.5,"transit_local":"17:25","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":1.42,"best_label":"good","best_window":"19:50\u201321:15","dark_hours":9.55,"date":"2034-03-03","moon_free_dark_hours":0.0,"moon_illumination":99,"moon_separation":90.6,"score":null,"score_astronomy":36,"score_weather":null,"transit_alt":72.5,"transit_local":"17:25","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":2.25,"best_label":"good","best_window":"19:50\u201322:05","dark_hours":9.51,"date":"2034-03-04","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":103.0,"score":null,"score_astronomy":44,"score_weather":null,"transit_alt":72.5,"transit_local":"17:20","verdict":"unknown","weather_source":"none","weekday":"Sat"}],"note":"score_astronomy for every night; score_weather/score only where a forecast (next 4 days) or ERA5 history exists \u2014 null otherwise","start":"2034-02-03","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"}}