{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":7.0,"best_label":"good","best_window":"23:15\u201306:15","dark_hours":10.16,"date":"2034-10-23","moon_free_dark_hours":2.47,"moon_illumination":83,"moon_separation":78.0,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"03:00","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":5.08,"best_label":"good","best_window":"01:10\u201306:15","dark_hours":10.2,"date":"2034-10-24","moon_free_dark_hours":1.35,"moon_illumination":90,"moon_separation":64.2,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"02:55","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":1.58,"best_label":"good","best_window":"04:40\u201306:15","dark_hours":10.24,"date":"2034-10-25","moon_free_dark_hours":0.18,"moon_illumination":96,"moon_separation":49.9,"score":null,"score_astronomy":91,"score_weather":null,"transit_alt":72.5,"transit_local":"02:50","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":6.0,"best_label":"marginal","best_window":"00:15\u201306:15","dark_hours":10.28,"date":"2034-10-26","moon_free_dark_hours":0.0,"moon_illumination":99,"moon_separation":35.4,"score":null,"score_astronomy":41,"score_weather":null,"transit_alt":72.5,"transit_local":"02:50","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":2.5,"best_label":"marginal","best_window":"03:45\u201306:15","dark_hours":10.32,"date":"2034-10-27","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":21.2,"score":null,"score_astronomy":27,"score_weather":null,"transit_alt":72.5,"transit_local":"02:45","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":2.92,"best_label":"marginal","best_window":"21:40\u201300:35","dark_hours":10.35,"date":"2034-10-28","moon_free_dark_hours":0.0,"moon_illumination":97,"moon_separation":9.7,"score":null,"score_astronomy":25,"score_weather":null,"transit_alt":72.5,"transit_local":"02:40","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":9.0,"best_label":"marginal","best_window":"20:20\u201305:20","dark_hours":10.39,"date":"2034-10-29","moon_free_dark_hours":0.4,"moon_illumination":91,"moon_separation":14.0,"score":null,"score_astronomy":35,"score_weather":null,"transit_alt":72.5,"transit_local":"01:35","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":9.33,"best_label":"marginal","best_window":"20:00\u201305:20","dark_hours":10.43,"date":"2034-10-30","moon_free_dark_hours":1.33,"moon_illumination":84,"moon_separation":27.1,"score":null,"score_astronomy":50,"score_weather":null,"transit_alt":72.5,"transit_local":"01:30","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":3.75,"best_label":"good","best_window":"20:20\u201300:05","dark_hours":10.47,"date":"2034-10-31","moon_free_dark_hours":2.35,"moon_illumination":74,"moon_separation":41.1,"score":null,"score_astronomy":83,"score_weather":null,"transit_alt":72.5,"transit_local":"01:30","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":7.83,"best_label":"good","best_window":"20:20\u201304:10","dark_hours":10.5,"date":"2034-11-01","moon_free_dark_hours":3.42,"moon_illumination":63,"moon_separation":54.9,"score":null,"score_astronomy":91,"score_weather":null,"transit_alt":72.5,"transit_local":"01:25","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":9.17,"best_label":"good","best_window":"20:15\u201305:25","dark_hours":10.54,"date":"2034-11-02","moon_free_dark_hours":4.48,"moon_illumination":52,"moon_separation":68.4,"score":null,"score_astronomy":99,"score_weather":null,"transit_alt":72.5,"transit_local":"01:20","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":9.25,"best_label":"good","best_window":"20:10\u201305:25","dark_hours":10.58,"date":"2034-11-03","moon_free_dark_hours":5.55,"moon_illumination":42,"moon_separation":81.6,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"01:15","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":9.33,"best_label":"good","best_window":"20:05\u201305:25","dark_hours":10.61,"date":"2034-11-04","moon_free_dark_hours":6.6,"moon_illumination":32,"moon_separation":94.4,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"01:10","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":9.33,"best_label":"good","best_window":"20:05\u201305:25","dark_hours":10.64,"date":"2034-11-05","moon_free_dark_hours":7.63,"moon_illumination":23,"moon_separation":106.9,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"01:10","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":9.5,"best_label":"good","best_window":"20:00\u201305:30","dark_hours":10.68,"date":"2034-11-06","moon_free_dark_hours":8.63,"moon_illumination":15,"moon_separation":119.1,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"01:05","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":9.58,"best_label":"good","best_window":"19:55\u201305:30","dark_hours":10.71,"date":"2034-11-07","moon_free_dark_hours":9.63,"moon_illumination":9,"moon_separation":131.1,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"01:00","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":9.67,"best_label":"good","best_window":"19:50\u201305:30","dark_hours":10.75,"date":"2034-11-08","moon_free_dark_hours":10.62,"moon_illumination":4,"moon_separation":142.9,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"00:55","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":9.75,"best_label":"good","best_window":"19:45\u201305:30","dark_hours":10.78,"date":"2034-11-09","moon_free_dark_hours":10.77,"moon_illumination":1,"moon_separation":154.4,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"00:55","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":9.75,"best_label":"good","best_window":"19:45\u201305:30","dark_hours":10.81,"date":"2034-11-10","moon_free_dark_hours":10.8,"moon_illumination":0,"moon_separation":164.9,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"00:50","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":9.92,"best_label":"good","best_window":"19:40\u201305:35","dark_hours":10.84,"date":"2034-11-11","moon_free_dark_hours":10.82,"moon_illumination":1,"moon_separation":171.2,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"00:45","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":10.0,"best_label":"good","best_window":"19:35\u201305:35","dark_hours":10.87,"date":"2034-11-12","moon_free_dark_hours":10.85,"moon_illumination":3,"moon_separation":165.7,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"00:40","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":10.08,"best_label":"good","best_window":"19:30\u201305:35","dark_hours":10.9,"date":"2034-11-13","moon_free_dark_hours":10.62,"moon_illumination":7,"moon_separation":155.3,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"00:35","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":10.08,"best_label":"good","best_window":"19:30\u201305:35","dark_hours":10.93,"date":"2034-11-14","moon_free_dark_hours":9.87,"moon_illumination":13,"moon_separation":144.0,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"00:35","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":10.17,"best_label":"good","best_window":"19:25\u201305:35","dark_hours":10.96,"date":"2034-11-15","moon_free_dark_hours":9.07,"moon_illumination":20,"moon_separation":132.4,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"00:30","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":10.25,"best_label":"good","best_window":"19:20\u201305:35","dark_hours":10.99,"date":"2034-11-16","moon_free_dark_hours":8.18,"moon_illumination":28,"moon_separation":120.5,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"00:25","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":10.17,"best_label":"good","best_window":"19:20\u201305:30","dark_hours":11.02,"date":"2034-11-17","moon_free_dark_hours":7.25,"moon_illumination":38,"moon_separation":108.3,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"00:20","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":10.08,"best_label":"good","best_window":"19:25\u201305:30","dark_hours":11.04,"date":"2034-11-18","moon_free_dark_hours":6.27,"moon_illumination":47,"moon_separation":95.9,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"00:15","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":9.92,"best_label":"good","best_window":"19:30\u201305:25","dark_hours":11.07,"date":"2034-11-19","moon_free_dark_hours":5.23,"moon_illumination":58,"moon_separation":83.0,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"00:15","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":9.17,"best_label":"good","best_window":"20:10\u201305:20","dark_hours":11.1,"date":"2034-11-20","moon_free_dark_hours":4.17,"moon_illumination":68,"moon_separation":69.8,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"00:10","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":7.0,"best_label":"good","best_window":"22:15\u201305:15","dark_hours":11.12,"date":"2034-11-21","moon_free_dark_hours":3.07,"moon_illumination":78,"moon_separation":56.1,"score":null,"score_astronomy":96,"score_weather":null,"transit_alt":72.5,"transit_local":"00:05","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":"2034-10-23","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"}}