{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":2.92,"best_label":"marginal","best_window":"02:35\u201305:30","dark_hours":10.78,"date":"2030-11-09","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":14.8,"score":null,"score_astronomy":28,"score_weather":null,"transit_alt":72.5,"transit_local":"00:55","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":1.42,"best_label":"marginal","best_window":"04:05\u201305:30","dark_hours":10.81,"date":"2030-11-10","moon_free_dark_hours":0.0,"moon_illumination":99,"moon_separation":4.2,"score":null,"score_astronomy":24,"score_weather":null,"transit_alt":72.5,"transit_local":"00:50","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":3.33,"best_label":"marginal","best_window":"19:40\u201323:00","dark_hours":10.84,"date":"2030-11-11","moon_free_dark_hours":0.0,"moon_illumination":97,"moon_separation":10.1,"score":null,"score_astronomy":29,"score_weather":null,"transit_alt":72.5,"transit_local":"00:45","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":5.25,"best_label":"marginal","best_window":"19:25\u201300:40","dark_hours":10.87,"date":"2030-11-12","moon_free_dark_hours":0.07,"moon_illumination":93,"moon_separation":21.6,"score":null,"score_astronomy":38,"score_weather":null,"transit_alt":72.5,"transit_local":"00:40","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":0.08,"best_label":"good","best_window":"19:30\u201319:35","dark_hours":10.9,"date":"2030-11-13","moon_free_dark_hours":0.93,"moon_illumination":88,"moon_separation":33.3,"score":null,"score_astronomy":61,"score_weather":null,"transit_alt":72.5,"transit_local":"00:35","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":3.58,"best_label":"good","best_window":"19:25\u201323:00","dark_hours":10.93,"date":"2030-11-14","moon_free_dark_hours":1.87,"moon_illumination":81,"moon_separation":45.1,"score":null,"score_astronomy":84,"score_weather":null,"transit_alt":72.5,"transit_local":"00:35","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":7.08,"best_label":"good","best_window":"19:25\u201302:30","dark_hours":10.96,"date":"2030-11-15","moon_free_dark_hours":2.82,"moon_illumination":73,"moon_separation":57.0,"score":null,"score_astronomy":92,"score_weather":null,"transit_alt":72.5,"transit_local":"00:30","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":8.92,"best_label":"good","best_window":"19:20\u201304:15","dark_hours":10.99,"date":"2030-11-16","moon_free_dark_hours":3.82,"moon_illumination":64,"moon_separation":69.0,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"00:25","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":9.92,"best_label":"good","best_window":"19:15\u201305:10","dark_hours":11.02,"date":"2030-11-17","moon_free_dark_hours":4.85,"moon_illumination":54,"moon_separation":81.3,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"00:20","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":10.08,"best_label":"good","best_window":"19:10\u201305:15","dark_hours":11.04,"date":"2030-11-18","moon_free_dark_hours":5.88,"moon_illumination":44,"moon_separation":93.8,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"00:15","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":10.17,"best_label":"good","best_window":"19:10\u201305:20","dark_hours":11.07,"date":"2030-11-19","moon_free_dark_hours":6.97,"moon_illumination":34,"moon_separation":106.7,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"00:15","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":10.25,"best_label":"good","best_window":"19:05\u201305:20","dark_hours":11.1,"date":"2030-11-20","moon_free_dark_hours":8.08,"moon_illumination":24,"moon_separation":120.0,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"00:10","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":10.25,"best_label":"good","best_window":"19:00\u201305:15","dark_hours":11.12,"date":"2030-11-21","moon_free_dark_hours":9.25,"moon_illumination":16,"moon_separation":133.9,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"00:05","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":10.25,"best_label":"good","best_window":"18:55\u201305:10","dark_hours":11.14,"date":"2030-11-22","moon_free_dark_hours":10.47,"moon_illumination":8,"moon_separation":148.1,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"00:00","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":10.33,"best_label":"good","best_window":"18:50\u201305:10","dark_hours":11.17,"date":"2030-11-23","moon_free_dark_hours":11.15,"moon_illumination":3,"moon_separation":162.7,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"00:00","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":10.25,"best_label":"good","best_window":"18:50\u201305:05","dark_hours":11.19,"date":"2030-11-24","moon_free_dark_hours":11.17,"moon_illumination":0,"moon_separation":176.1,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"23:55","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":10.25,"best_label":"good","best_window":"18:45\u201305:00","dark_hours":11.21,"date":"2030-11-25","moon_free_dark_hours":11.2,"moon_illumination":1,"moon_separation":166.3,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"23:50","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":10.25,"best_label":"good","best_window":"18:40\u201304:55","dark_hours":11.24,"date":"2030-11-26","moon_free_dark_hours":11.22,"moon_illumination":4,"moon_separation":151.3,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"23:45","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":10.33,"best_label":"good","best_window":"18:35\u201304:55","dark_hours":11.26,"date":"2030-11-27","moon_free_dark_hours":10.55,"moon_illumination":10,"moon_separation":136.3,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"23:40","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":10.25,"best_label":"good","best_window":"18:35\u201304:50","dark_hours":11.28,"date":"2030-11-28","moon_free_dark_hours":9.33,"moon_illumination":18,"moon_separation":121.6,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"23:40","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":10.17,"best_label":"good","best_window":"18:35\u201304:45","dark_hours":11.3,"date":"2030-11-29","moon_free_dark_hours":8.15,"moon_illumination":28,"moon_separation":107.3,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"23:35","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":10.08,"best_label":"good","best_window":"18:35\u201304:40","dark_hours":11.31,"date":"2030-11-30","moon_free_dark_hours":7.0,"moon_illumination":39,"moon_separation":93.5,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"23:30","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":9.92,"best_label":"good","best_window":"18:40\u201304:35","dark_hours":11.33,"date":"2030-12-01","moon_free_dark_hours":5.88,"moon_illumination":50,"moon_separation":80.1,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"23:25","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":9.42,"best_label":"good","best_window":"19:10\u201304:35","dark_hours":11.35,"date":"2030-12-02","moon_free_dark_hours":4.83,"moon_illumination":60,"moon_separation":67.0,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":72.5,"transit_local":"23:20","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":7.5,"best_label":"good","best_window":"21:00\u201304:30","dark_hours":11.36,"date":"2030-12-03","moon_free_dark_hours":3.8,"moon_illumination":70,"moon_separation":54.3,"score":null,"score_astronomy":94,"score_weather":null,"transit_alt":72.5,"transit_local":"23:20","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":3.67,"best_label":"good","best_window":"00:45\u201304:25","dark_hours":11.38,"date":"2030-12-04","moon_free_dark_hours":2.78,"moon_illumination":78,"moon_separation":41.9,"score":null,"score_astronomy":86,"score_weather":null,"transit_alt":72.5,"transit_local":"23:15","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":0.17,"best_label":"good","best_window":"04:10\u201304:20","dark_hours":11.39,"date":"2030-12-05","moon_free_dark_hours":1.78,"moon_illumination":86,"moon_separation":29.7,"score":null,"score_astronomy":66,"score_weather":null,"transit_alt":72.5,"transit_local":"23:10","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":6.08,"best_label":"marginal","best_window":"22:25\u201304:30","dark_hours":11.41,"date":"2030-12-06","moon_free_dark_hours":0.82,"moon_illumination":92,"moon_separation":17.8,"score":null,"score_astronomy":39,"score_weather":null,"transit_alt":72.5,"transit_local":"23:05","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":3.33,"best_label":"marginal","best_window":"00:50\u201304:10","dark_hours":11.42,"date":"2030-12-07","moon_free_dark_hours":0.0,"moon_illumination":96,"moon_separation":6.4,"score":null,"score_astronomy":28,"score_weather":null,"transit_alt":72.5,"transit_local":"23:05","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":1.75,"best_label":"marginal","best_window":"18:35\u201320:20","dark_hours":11.43,"date":"2030-12-08","moon_free_dark_hours":0.0,"moon_illumination":99,"moon_separation":7.3,"score":null,"score_astronomy":24,"score_weather":null,"transit_alt":72.5,"transit_local":"23:00","verdict":"unknown","weather_source":"none","weekday":"Sun"}],"note":"score_astronomy for every night; score_weather/score only where a forecast (next 4 days) or ERA5 history exists \u2014 null otherwise","start":"2030-11-09","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"}}