{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":3.25,"best_label":"good","best_window":"19:40\u201322:55","dark_hours":9.92,"date":"2035-02-23","moon_free_dark_hours":0.0,"moon_illumination":97,"moon_separation":114.8,"score":null,"score_astronomy":73,"score_weather":null,"transit_alt":72.5,"transit_local":"17:55","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":3.25,"best_label":"good","best_window":"19:40\u201322:55","dark_hours":9.88,"date":"2035-02-24","moon_free_dark_hours":0.93,"moon_illumination":92,"moon_separation":127.7,"score":null,"score_astronomy":83,"score_weather":null,"transit_alt":72.5,"transit_local":"17:50","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":3.17,"best_label":"good","best_window":"19:40\u201322:50","dark_hours":9.83,"date":"2035-02-25","moon_free_dark_hours":1.95,"moon_illumination":86,"moon_separation":140.2,"score":null,"score_astronomy":84,"score_weather":null,"transit_alt":72.5,"transit_local":"17:50","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":3.17,"best_label":"good","best_window":"19:40\u201322:50","dark_hours":9.79,"date":"2035-02-26","moon_free_dark_hours":2.93,"moon_illumination":79,"moon_separation":152.1,"score":null,"score_astronomy":85,"score_weather":null,"transit_alt":72.5,"transit_local":"17:45","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":3.08,"best_label":"good","best_window":"19:45\u201322:50","dark_hours":9.75,"date":"2035-02-27","moon_free_dark_hours":3.87,"moon_illumination":70,"moon_separation":163.1,"score":null,"score_astronomy":82,"score_weather":null,"transit_alt":72.5,"transit_local":"17:40","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":3.0,"best_label":"good","best_window":"19:45\u201322:45","dark_hours":9.7,"date":"2035-02-28","moon_free_dark_hours":4.8,"moon_illumination":61,"moon_separation":170.5,"score":null,"score_astronomy":80,"score_weather":null,"transit_alt":72.5,"transit_local":"17:35","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":3.0,"best_label":"good","best_window":"19:45\u201322:45","dark_hours":9.66,"date":"2035-03-01","moon_free_dark_hours":5.68,"moon_illumination":52,"moon_separation":166.7,"score":null,"score_astronomy":77,"score_weather":null,"transit_alt":72.5,"transit_local":"17:30","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":2.92,"best_label":"good","best_window":"19:45\u201322:40","dark_hours":9.61,"date":"2035-03-02","moon_free_dark_hours":6.55,"moon_illumination":42,"moon_separation":156.8,"score":null,"score_astronomy":74,"score_weather":null,"transit_alt":72.5,"transit_local":"17:30","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":2.75,"best_label":"good","best_window":"19:50\u201322:35","dark_hours":9.56,"date":"2035-03-03","moon_free_dark_hours":7.35,"moon_illumination":33,"moon_separation":145.6,"score":null,"score_astronomy":72,"score_weather":null,"transit_alt":72.5,"transit_local":"17:25","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":2.67,"best_label":"good","best_window":"19:50\u201322:30","dark_hours":9.52,"date":"2035-03-04","moon_free_dark_hours":8.1,"moon_illumination":24,"moon_separation":134.0,"score":null,"score_astronomy":70,"score_weather":null,"transit_alt":72.5,"transit_local":"17:20","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":2.67,"best_label":"good","best_window":"19:50\u201322:30","dark_hours":9.47,"date":"2035-03-05","moon_free_dark_hours":8.78,"moon_illumination":17,"moon_separation":122.0,"score":null,"score_astronomy":67,"score_weather":null,"transit_alt":72.5,"transit_local":"17:15","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":2.58,"best_label":"good","best_window":"19:50\u201322:25","dark_hours":9.42,"date":"2035-03-06","moon_free_dark_hours":9.4,"moon_illumination":10,"moon_separation":109.8,"score":null,"score_astronomy":65,"score_weather":null,"transit_alt":72.5,"transit_local":"17:15","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":2.42,"best_label":"good","best_window":"19:55\u201322:20","dark_hours":9.38,"date":"2035-03-07","moon_free_dark_hours":9.35,"moon_illumination":5,"moon_separation":97.2,"score":null,"score_astronomy":61,"score_weather":null,"transit_alt":72.5,"transit_local":"17:10","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":2.33,"best_label":"good","best_window":"19:55\u201322:15","dark_hours":9.33,"date":"2035-03-08","moon_free_dark_hours":9.32,"moon_illumination":1,"moon_separation":84.2,"score":null,"score_astronomy":60,"score_weather":null,"transit_alt":72.5,"transit_local":"17:05","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":2.25,"best_label":"good","best_window":"19:55\u201322:10","dark_hours":9.28,"date":"2035-03-09","moon_free_dark_hours":9.27,"moon_illumination":0,"moon_separation":71.0,"score":null,"score_astronomy":57,"score_weather":null,"transit_alt":72.5,"transit_local":"17:00","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":2.25,"best_label":"good","best_window":"19:55\u201322:10","dark_hours":9.23,"date":"2035-03-10","moon_free_dark_hours":9.22,"moon_illumination":1,"moon_separation":57.5,"score":null,"score_astronomy":56,"score_weather":null,"transit_alt":72.5,"transit_local":"16:55","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":2.08,"best_label":"good","best_window":"20:00\u201322:05","dark_hours":9.18,"date":"2035-03-11","moon_free_dark_hours":9.02,"moon_illumination":5,"moon_separation":43.9,"score":null,"score_astronomy":52,"score_weather":null,"transit_alt":72.5,"transit_local":"16:55","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":2.0,"best_label":"good","best_window":"20:00\u201322:00","dark_hours":9.13,"date":"2035-03-12","moon_free_dark_hours":7.85,"moon_illumination":11,"moon_separation":30.3,"score":null,"score_astronomy":46,"score_weather":null,"transit_alt":72.5,"transit_local":"16:50","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":1.83,"best_label":"good","best_window":"20:00\u201321:50","dark_hours":9.09,"date":"2035-03-13","moon_free_dark_hours":6.68,"moon_illumination":19,"moon_separation":17.4,"score":null,"score_astronomy":40,"score_weather":null,"transit_alt":72.5,"transit_local":"16:45","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":1.58,"best_label":"good","best_window":"20:00\u201321:35","dark_hours":9.04,"date":"2035-03-14","moon_free_dark_hours":5.5,"moon_illumination":29,"moon_separation":9.2,"score":null,"score_astronomy":32,"score_weather":null,"transit_alt":72.5,"transit_local":"16:40","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":1.25,"best_label":"good","best_window":"20:05\u201321:20","dark_hours":8.99,"date":"2035-03-15","moon_free_dark_hours":4.38,"moon_illumination":40,"moon_separation":16.4,"score":null,"score_astronomy":24,"score_weather":null,"transit_alt":72.5,"transit_local":"16:35","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":2.0,"best_label":"marginal","best_window":"20:05\u201322:05","dark_hours":8.94,"date":"2035-03-16","moon_free_dark_hours":3.32,"moon_illumination":51,"moon_separation":29.1,"score":null,"score_astronomy":17,"score_weather":null,"transit_alt":72.5,"transit_local":"16:35","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":1.83,"best_label":"marginal","best_window":"20:05\u201321:55","dark_hours":8.88,"date":"2035-03-17","moon_free_dark_hours":2.33,"moon_illumination":62,"moon_separation":42.6,"score":null,"score_astronomy":14,"score_weather":null,"transit_alt":72.5,"transit_local":"16:30","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":1.75,"best_label":"marginal","best_window":"20:05\u201321:50","dark_hours":8.83,"date":"2035-03-18","moon_free_dark_hours":1.45,"moon_illumination":73,"moon_separation":56.3,"score":null,"score_astronomy":13,"score_weather":null,"transit_alt":72.5,"transit_local":"16:25","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":1.67,"best_label":"marginal","best_window":"20:05\u201321:45","dark_hours":8.78,"date":"2035-03-19","moon_free_dark_hours":0.65,"moon_illumination":82,"moon_separation":69.9,"score":null,"score_astronomy":13,"score_weather":null,"transit_alt":72.5,"transit_local":"16:20","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":1.58,"best_label":"marginal","best_window":"20:10\u201321:45","dark_hours":8.73,"date":"2035-03-20","moon_free_dark_hours":0.0,"moon_illumination":90,"moon_separation":83.5,"score":null,"score_astronomy":15,"score_weather":null,"transit_alt":72.5,"transit_local":"16:20","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":0.58,"best_label":"good","best_window":"20:10\u201320:45","dark_hours":8.68,"date":"2035-03-21","moon_free_dark_hours":0.0,"moon_illumination":96,"moon_separation":96.9,"score":null,"score_astronomy":18,"score_weather":null,"transit_alt":72.5,"transit_local":"16:15","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":0.83,"best_label":"good","best_window":"20:10\u201321:00","dark_hours":8.63,"date":"2035-03-22","moon_free_dark_hours":0.0,"moon_illumination":99,"moon_separation":110.1,"score":null,"score_astronomy":21,"score_weather":null,"transit_alt":72.5,"transit_local":"16:10","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":0.92,"best_label":"good","best_window":"20:10\u201321:05","dark_hours":8.58,"date":"2035-03-23","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":123.0,"score":null,"score_astronomy":23,"score_weather":null,"transit_alt":72.5,"transit_local":"16:05","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":0.83,"best_label":"good","best_window":"20:15\u201321:05","dark_hours":8.52,"date":"2035-03-24","moon_free_dark_hours":0.0,"moon_illumination":99,"moon_separation":135.6,"score":null,"score_astronomy":22,"score_weather":null,"transit_alt":72.5,"transit_local":"16:00","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":"2035-02-23","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"}}