{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":3.75,"best_label":"good","best_window":"19:10\u201322:55","dark_hours":10.9,"date":"2032-01-28","moon_free_dark_hours":0.0,"moon_illumination":98,"moon_separation":84.4,"score":null,"score_astronomy":78,"score_weather":null,"transit_alt":72.5,"transit_local":"19:40","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":5.0,"best_label":"good","best_window":"19:10\u201300:10","dark_hours":10.87,"date":"2032-01-29","moon_free_dark_hours":0.62,"moon_illumination":95,"moon_separation":96.3,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"19:35","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":5.25,"best_label":"good","best_window":"19:10\u201300:25","dark_hours":10.84,"date":"2032-01-30","moon_free_dark_hours":1.55,"moon_illumination":90,"moon_separation":108.2,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"19:30","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":5.25,"best_label":"good","best_window":"19:15\u201300:30","dark_hours":10.8,"date":"2032-01-31","moon_free_dark_hours":2.5,"moon_illumination":83,"moon_separation":120.2,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"19:25","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":5.17,"best_label":"good","best_window":"19:15\u201300:25","dark_hours":10.77,"date":"2032-02-01","moon_free_dark_hours":3.48,"moon_illumination":76,"moon_separation":132.3,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"19:25","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":5.17,"best_label":"good","best_window":"19:15\u201300:25","dark_hours":10.74,"date":"2032-02-02","moon_free_dark_hours":4.47,"moon_illumination":66,"moon_separation":144.6,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"19:20","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":5.17,"best_label":"good","best_window":"19:15\u201300:25","dark_hours":10.71,"date":"2032-02-03","moon_free_dark_hours":5.48,"moon_illumination":57,"moon_separation":157.0,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"19:15","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":5.08,"best_label":"good","best_window":"19:15\u201300:20","dark_hours":10.67,"date":"2032-02-04","moon_free_dark_hours":6.53,"moon_illumination":46,"moon_separation":169.3,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"19:10","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":5.0,"best_label":"good","best_window":"19:20\u201300:20","dark_hours":10.64,"date":"2032-02-05","moon_free_dark_hours":7.57,"moon_illumination":36,"moon_separation":173.1,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"19:10","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":4.92,"best_label":"good","best_window":"19:20\u201300:15","dark_hours":10.6,"date":"2032-02-06","moon_free_dark_hours":8.57,"moon_illumination":25,"moon_separation":161.1,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"19:05","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":4.83,"best_label":"good","best_window":"19:20\u201300:10","dark_hours":10.57,"date":"2032-02-07","moon_free_dark_hours":9.5,"moon_illumination":16,"moon_separation":147.0,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"19:00","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":4.75,"best_label":"good","best_window":"19:20\u201300:05","dark_hours":10.53,"date":"2032-02-08","moon_free_dark_hours":10.33,"moon_illumination":8,"moon_separation":132.4,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"18:55","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":4.67,"best_label":"good","best_window":"19:25\u201300:05","dark_hours":10.49,"date":"2032-02-09","moon_free_dark_hours":10.47,"moon_illumination":3,"moon_separation":117.4,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"18:50","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":4.58,"best_label":"good","best_window":"19:25\u201300:00","dark_hours":10.46,"date":"2032-02-10","moon_free_dark_hours":10.43,"moon_illumination":0,"moon_separation":102.2,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"18:50","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":4.5,"best_label":"good","best_window":"19:25\u201323:55","dark_hours":10.42,"date":"2032-02-11","moon_free_dark_hours":10.4,"moon_illumination":1,"moon_separation":87.0,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"18:45","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":4.42,"best_label":"good","best_window":"19:25\u201323:50","dark_hours":10.38,"date":"2032-02-12","moon_free_dark_hours":10.2,"moon_illumination":4,"moon_separation":72.1,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"18:40","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":4.33,"best_label":"good","best_window":"19:25\u201323:45","dark_hours":10.34,"date":"2032-02-13","moon_free_dark_hours":8.95,"moon_illumination":10,"moon_separation":57.4,"score":null,"score_astronomy":98,"score_weather":null,"transit_alt":72.5,"transit_local":"18:35","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":4.25,"best_label":"good","best_window":"19:30\u201323:45","dark_hours":10.3,"date":"2032-02-14","moon_free_dark_hours":7.75,"moon_illumination":18,"moon_separation":43.2,"score":null,"score_astronomy":92,"score_weather":null,"transit_alt":72.5,"transit_local":"18:30","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":4.17,"best_label":"good","best_window":"19:30\u201323:40","dark_hours":10.26,"date":"2032-02-15","moon_free_dark_hours":6.58,"moon_illumination":28,"moon_separation":29.6,"score":null,"score_astronomy":79,"score_weather":null,"transit_alt":72.5,"transit_local":"18:30","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":3.83,"best_label":"good","best_window":"19:30\u201323:20","dark_hours":10.22,"date":"2032-02-16","moon_free_dark_hours":5.48,"moon_illumination":38,"moon_separation":16.7,"score":null,"score_astronomy":62,"score_weather":null,"transit_alt":72.5,"transit_local":"18:25","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":3.08,"best_label":"good","best_window":"19:30\u201322:35","dark_hours":10.18,"date":"2032-02-17","moon_free_dark_hours":4.45,"moon_illumination":48,"moon_separation":6.3,"score":null,"score_astronomy":47,"score_weather":null,"transit_alt":72.5,"transit_local":"18:20","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":4.25,"best_label":"marginal","best_window":"19:35\u201323:50","dark_hours":10.14,"date":"2032-02-18","moon_free_dark_hours":3.48,"moon_illumination":58,"moon_separation":11.2,"score":null,"score_astronomy":34,"score_weather":null,"transit_alt":72.5,"transit_local":"18:15","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":4.0,"best_label":"marginal","best_window":"19:35\u201323:35","dark_hours":10.1,"date":"2032-02-19","moon_free_dark_hours":2.62,"moon_illumination":67,"moon_separation":22.6,"score":null,"score_astronomy":24,"score_weather":null,"transit_alt":72.5,"transit_local":"18:15","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":3.75,"best_label":"marginal","best_window":"19:35\u201323:20","dark_hours":10.06,"date":"2032-02-20","moon_free_dark_hours":1.83,"moon_illumination":76,"moon_separation":34.4,"score":null,"score_astronomy":19,"score_weather":null,"transit_alt":72.5,"transit_local":"18:10","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":3.58,"best_label":"marginal","best_window":"19:35\u201323:10","dark_hours":10.02,"date":"2032-02-21","moon_free_dark_hours":1.12,"moon_illumination":84,"moon_separation":46.1,"score":null,"score_astronomy":21,"score_weather":null,"transit_alt":72.5,"transit_local":"18:05","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":3.58,"best_label":"marginal","best_window":"19:35\u201323:10","dark_hours":9.98,"date":"2032-02-22","moon_free_dark_hours":0.48,"moon_illumination":90,"moon_separation":57.9,"score":null,"score_astronomy":25,"score_weather":null,"transit_alt":72.5,"transit_local":"18:00","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":3.58,"best_label":"marginal","best_window":"19:40\u201323:15","dark_hours":9.93,"date":"2032-02-23","moon_free_dark_hours":0.0,"moon_illumination":95,"moon_separation":69.6,"score":null,"score_astronomy":30,"score_weather":null,"transit_alt":72.5,"transit_local":"17:55","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":1.17,"best_label":"good","best_window":"19:40\u201320:50","dark_hours":9.89,"date":"2032-02-24","moon_free_dark_hours":0.0,"moon_illumination":98,"moon_separation":81.4,"score":null,"score_astronomy":38,"score_weather":null,"transit_alt":72.5,"transit_local":"17:55","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":2.25,"best_label":"good","best_window":"19:40\u201321:55","dark_hours":9.85,"date":"2032-02-25","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":93.2,"score":null,"score_astronomy":48,"score_weather":null,"transit_alt":72.5,"transit_local":"17:50","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":2.92,"best_label":"good","best_window":"19:40\u201322:35","dark_hours":9.8,"date":"2032-02-26","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":105.2,"score":null,"score_astronomy":59,"score_weather":null,"transit_alt":72.5,"transit_local":"17:45","verdict":"unknown","weather_source":"none","weekday":"Thu"}],"note":"score_astronomy for every night; score_weather/score only where a forecast (next 4 days) or ERA5 history exists \u2014 null otherwise","start":"2032-01-28","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"}}