{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":7.25,"best_label":"good","best_window":"18:50\u201302:05","dark_hours":11.35,"date":"2032-01-09","moon_free_dark_hours":10.33,"moon_illumination":12,"moon_separation":169.1,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"20:55","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":7.17,"best_label":"good","best_window":"18:50\u201302:00","dark_hours":11.33,"date":"2032-01-10","moon_free_dark_hours":11.32,"moon_illumination":5,"moon_separation":155.2,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"20:50","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":7.08,"best_label":"good","best_window":"18:50\u201301:55","dark_hours":11.31,"date":"2032-01-11","moon_free_dark_hours":11.3,"moon_illumination":1,"moon_separation":140.5,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"20:45","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":7.0,"best_label":"good","best_window":"18:55\u201301:55","dark_hours":11.3,"date":"2032-01-12","moon_free_dark_hours":11.28,"moon_illumination":0,"moon_separation":125.4,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"20:40","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":6.92,"best_label":"good","best_window":"18:55\u201301:50","dark_hours":11.28,"date":"2032-01-13","moon_free_dark_hours":11.25,"moon_illumination":2,"moon_separation":110.2,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"20:40","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":6.83,"best_label":"good","best_window":"18:55\u201301:45","dark_hours":11.26,"date":"2032-01-14","moon_free_dark_hours":10.57,"moon_illumination":7,"moon_separation":95.1,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"20:35","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":6.75,"best_label":"good","best_window":"18:55\u201301:40","dark_hours":11.23,"date":"2032-01-15","moon_free_dark_hours":9.32,"moon_illumination":14,"moon_separation":80.3,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"20:30","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":6.67,"best_label":"good","best_window":"18:55\u201301:35","dark_hours":11.21,"date":"2032-01-16","moon_free_dark_hours":8.12,"moon_illumination":23,"moon_separation":65.9,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"20:25","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":6.58,"best_label":"good","best_window":"19:00\u201301:35","dark_hours":11.19,"date":"2032-01-17","moon_free_dark_hours":6.95,"moon_illumination":33,"moon_separation":51.9,"score":null,"score_astronomy":94,"score_weather":null,"transit_alt":72.5,"transit_local":"20:20","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":6.5,"best_label":"good","best_window":"19:00\u201301:30","dark_hours":11.17,"date":"2032-01-18","moon_free_dark_hours":5.82,"moon_illumination":44,"moon_separation":38.3,"score":null,"score_astronomy":85,"score_weather":null,"transit_alt":72.5,"transit_local":"20:20","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":5.33,"best_label":"good","best_window":"19:40\u201301:00","dark_hours":11.14,"date":"2032-01-19","moon_free_dark_hours":4.73,"moon_illumination":55,"moon_separation":25.4,"score":null,"score_astronomy":66,"score_weather":null,"transit_alt":72.5,"transit_local":"20:15","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":6.75,"best_label":"marginal","best_window":"19:00\u201301:45","dark_hours":11.12,"date":"2032-01-20","moon_free_dark_hours":3.7,"moon_illumination":65,"moon_separation":13.1,"score":null,"score_astronomy":52,"score_weather":null,"transit_alt":72.5,"transit_local":"20:10","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":6.5,"best_label":"marginal","best_window":"19:00\u201301:30","dark_hours":11.09,"date":"2032-01-21","moon_free_dark_hours":2.72,"moon_illumination":74,"moon_separation":5.3,"score":null,"score_astronomy":36,"score_weather":null,"transit_alt":72.5,"transit_local":"20:05","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":6.17,"best_label":"marginal","best_window":"19:05\u201301:15","dark_hours":11.07,"date":"2032-01-22","moon_free_dark_hours":1.82,"moon_illumination":82,"moon_separation":13.9,"score":null,"score_astronomy":25,"score_weather":null,"transit_alt":72.5,"transit_local":"20:05","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":5.67,"best_label":"marginal","best_window":"19:05\u201300:45","dark_hours":11.04,"date":"2032-01-23","moon_free_dark_hours":0.98,"moon_illumination":89,"moon_separation":25.5,"score":null,"score_astronomy":20,"score_weather":null,"transit_alt":72.5,"transit_local":"20:00","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":4.0,"best_label":"marginal","best_window":"19:05\u201323:05","dark_hours":11.01,"date":"2032-01-24","moon_free_dark_hours":0.25,"moon_illumination":94,"moon_separation":37.3,"score":null,"score_astronomy":23,"score_weather":null,"transit_alt":72.5,"transit_local":"19:55","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":5.58,"best_label":"marginal","best_window":"19:05\u201300:40","dark_hours":10.99,"date":"2032-01-25","moon_free_dark_hours":0.0,"moon_illumination":98,"moon_separation":49.1,"score":null,"score_astronomy":32,"score_weather":null,"transit_alt":72.5,"transit_local":"19:50","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":6.25,"best_label":"marginal","best_window":"18:35\u201300:50","dark_hours":10.96,"date":"2032-01-26","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":60.9,"score":null,"score_astronomy":46,"score_weather":null,"transit_alt":72.5,"transit_local":"19:45","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":2.25,"best_label":"good","best_window":"19:10\u201321:25","dark_hours":10.93,"date":"2032-01-27","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":72.7,"score":null,"score_astronomy":62,"score_weather":null,"transit_alt":72.5,"transit_local":"19:45","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"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"}],"note":"score_astronomy for every night; score_weather/score only where a forecast (next 4 days) or ERA5 history exists \u2014 null otherwise","start":"2032-01-09","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"}}