{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":0.58,"best_label":"good","best_window":"05:00\u201305:35","dark_hours":10.01,"date":"2031-02-21","moon_free_dark_hours":9.98,"moon_illumination":0,"moon_separation":52.6,"score":null,"score_astronomy":20,"score_weather":null,"transit_alt":87.2,"transit_local":"11:15","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":0.67,"best_label":"good","best_window":"04:55\u201305:35","dark_hours":9.96,"date":"2031-02-22","moon_free_dark_hours":9.95,"moon_illumination":2,"moon_separation":53.5,"score":null,"score_astronomy":22,"score_weather":null,"transit_alt":87.2,"transit_local":"11:10","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":0.75,"best_label":"good","best_window":"04:50\u201305:35","dark_hours":9.92,"date":"2031-02-23","moon_free_dark_hours":9.17,"moon_illumination":7,"moon_separation":56.8,"score":null,"score_astronomy":23,"score_weather":null,"transit_alt":87.2,"transit_local":"11:05","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":0.83,"best_label":"good","best_window":"04:45\u201305:35","dark_hours":9.88,"date":"2031-02-24","moon_free_dark_hours":8.05,"moon_illumination":13,"moon_separation":61.9,"score":null,"score_astronomy":24,"score_weather":null,"transit_alt":87.2,"transit_local":"11:00","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":0.83,"best_label":"good","best_window":"04:40\u201305:30","dark_hours":9.83,"date":"2031-02-25","moon_free_dark_hours":6.93,"moon_illumination":20,"moon_separation":68.1,"score":null,"score_astronomy":24,"score_weather":null,"transit_alt":87.2,"transit_local":"10:55","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":0.83,"best_label":"good","best_window":"04:40\u201305:30","dark_hours":9.79,"date":"2031-02-26","moon_free_dark_hours":5.9,"moon_illumination":29,"moon_separation":75.0,"score":null,"score_astronomy":25,"score_weather":null,"transit_alt":87.2,"transit_local":"10:55","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":0.92,"best_label":"good","best_window":"04:35\u201305:30","dark_hours":9.75,"date":"2031-02-27","moon_free_dark_hours":4.88,"moon_illumination":38,"moon_separation":82.2,"score":null,"score_astronomy":26,"score_weather":null,"transit_alt":87.2,"transit_local":"10:50","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":0.92,"best_label":"good","best_window":"04:30\u201305:25","dark_hours":9.7,"date":"2031-02-28","moon_free_dark_hours":3.95,"moon_illumination":48,"moon_separation":89.4,"score":null,"score_astronomy":26,"score_weather":null,"transit_alt":87.2,"transit_local":"10:45","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":1.0,"best_label":"good","best_window":"04:25\u201305:25","dark_hours":9.66,"date":"2031-03-01","moon_free_dark_hours":3.08,"moon_illumination":57,"moon_separation":96.7,"score":null,"score_astronomy":27,"score_weather":null,"transit_alt":87.2,"transit_local":"10:40","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":1.08,"best_label":"good","best_window":"04:20\u201305:25","dark_hours":9.61,"date":"2031-03-02","moon_free_dark_hours":2.3,"moon_illumination":66,"moon_separation":103.7,"score":null,"score_astronomy":29,"score_weather":null,"transit_alt":87.2,"transit_local":"10:35","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":1.0,"best_label":"good","best_window":"04:20\u201305:20","dark_hours":9.56,"date":"2031-03-03","moon_free_dark_hours":1.6,"moon_illumination":75,"moon_separation":110.3,"score":null,"score_astronomy":28,"score_weather":null,"transit_alt":87.2,"transit_local":"10:35","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":1.0,"best_label":"good","best_window":"04:20\u201305:20","dark_hours":9.52,"date":"2031-03-04","moon_free_dark_hours":0.95,"moon_illumination":83,"moon_separation":116.3,"score":null,"score_astronomy":29,"score_weather":null,"transit_alt":87.2,"transit_local":"10:30","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":1.0,"best_label":"good","best_window":"04:20\u201305:20","dark_hours":9.47,"date":"2031-03-05","moon_free_dark_hours":0.4,"moon_illumination":89,"moon_separation":121.4,"score":null,"score_astronomy":29,"score_weather":null,"transit_alt":87.2,"transit_local":"10:25","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":1.0,"best_label":"good","best_window":"04:15\u201305:15","dark_hours":9.42,"date":"2031-03-06","moon_free_dark_hours":0.0,"moon_illumination":95,"moon_separation":125.2,"score":null,"score_astronomy":26,"score_weather":null,"transit_alt":87.2,"transit_local":"10:20","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":1.0,"best_label":"good","best_window":"04:15\u201305:15","dark_hours":9.38,"date":"2031-03-07","moon_free_dark_hours":0.0,"moon_illumination":98,"moon_separation":127.2,"score":null,"score_astronomy":27,"score_weather":null,"transit_alt":87.2,"transit_local":"10:20","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":1.08,"best_label":"good","best_window":"04:10\u201305:15","dark_hours":9.33,"date":"2031-03-08","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":127.2,"score":null,"score_astronomy":26,"score_weather":null,"transit_alt":87.2,"transit_local":"10:15","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":1.0,"best_label":"good","best_window":"04:10\u201305:10","dark_hours":9.28,"date":"2031-03-09","moon_free_dark_hours":0.0,"moon_illumination":99,"moon_separation":124.9,"score":null,"score_astronomy":26,"score_weather":null,"transit_alt":87.2,"transit_local":"10:10","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":1.08,"best_label":"good","best_window":"04:05\u201305:10","dark_hours":9.23,"date":"2031-03-10","moon_free_dark_hours":0.22,"moon_illumination":96,"moon_separation":120.6,"score":null,"score_astronomy":27,"score_weather":null,"transit_alt":87.2,"transit_local":"10:05","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":1.08,"best_label":"good","best_window":"04:05\u201305:10","dark_hours":9.18,"date":"2031-03-11","moon_free_dark_hours":1.32,"moon_illumination":91,"moon_separation":114.7,"score":null,"score_astronomy":27,"score_weather":null,"transit_alt":87.2,"transit_local":"10:00","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":1.08,"best_label":"good","best_window":"04:00\u201305:05","dark_hours":9.14,"date":"2031-03-12","moon_free_dark_hours":2.43,"moon_illumination":84,"moon_separation":107.5,"score":null,"score_astronomy":25,"score_weather":null,"transit_alt":87.2,"transit_local":"10:00","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":1.08,"best_label":"good","best_window":"04:00\u201305:05","dark_hours":9.09,"date":"2031-03-13","moon_free_dark_hours":3.55,"moon_illumination":75,"moon_separation":99.5,"score":null,"score_astronomy":25,"score_weather":null,"transit_alt":87.2,"transit_local":"09:55","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":1.17,"best_label":"good","best_window":"03:55\u201305:05","dark_hours":9.04,"date":"2031-03-14","moon_free_dark_hours":4.63,"moon_illumination":65,"moon_separation":91.0,"score":null,"score_astronomy":26,"score_weather":null,"transit_alt":87.2,"transit_local":"09:50","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":1.17,"best_label":"good","best_window":"03:50\u201305:00","dark_hours":8.99,"date":"2031-03-15","moon_free_dark_hours":5.62,"moon_illumination":54,"moon_separation":82.5,"score":null,"score_astronomy":27,"score_weather":null,"transit_alt":87.2,"transit_local":"09:45","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":1.33,"best_label":"good","best_window":"03:40\u201305:00","dark_hours":8.94,"date":"2031-03-16","moon_free_dark_hours":6.5,"moon_illumination":42,"moon_separation":74.2,"score":null,"score_astronomy":30,"score_weather":null,"transit_alt":87.2,"transit_local":"09:40","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":1.42,"best_label":"good","best_window":"03:35\u201305:00","dark_hours":8.89,"date":"2031-03-17","moon_free_dark_hours":7.27,"moon_illumination":31,"moon_separation":66.6,"score":null,"score_astronomy":33,"score_weather":null,"transit_alt":87.2,"transit_local":"09:40","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":1.58,"best_label":"good","best_window":"03:20\u201304:55","dark_hours":8.84,"date":"2031-03-18","moon_free_dark_hours":7.93,"moon_illumination":21,"moon_separation":60.1,"score":null,"score_astronomy":36,"score_weather":null,"transit_alt":87.2,"transit_local":"09:35","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":1.67,"best_label":"good","best_window":"03:15\u201304:55","dark_hours":8.78,"date":"2031-03-19","moon_free_dark_hours":8.52,"moon_illumination":13,"moon_separation":55.3,"score":null,"score_astronomy":41,"score_weather":null,"transit_alt":87.2,"transit_local":"09:30","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":1.75,"best_label":"good","best_window":"03:10\u201304:55","dark_hours":8.73,"date":"2031-03-20","moon_free_dark_hours":8.72,"moon_illumination":6,"moon_separation":52.8,"score":null,"score_astronomy":43,"score_weather":null,"transit_alt":87.2,"transit_local":"09:25","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":1.75,"best_label":"good","best_window":"03:05\u201304:50","dark_hours":8.68,"date":"2031-03-21","moon_free_dark_hours":8.67,"moon_illumination":2,"moon_separation":52.8,"score":null,"score_astronomy":43,"score_weather":null,"transit_alt":87.2,"transit_local":"09:25","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":1.75,"best_label":"good","best_window":"03:05\u201304:50","dark_hours":8.63,"date":"2031-03-22","moon_free_dark_hours":8.62,"moon_illumination":0,"moon_separation":55.3,"score":null,"score_astronomy":44,"score_weather":null,"transit_alt":87.2,"transit_local":"09:20","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":"2031-02-21","target":{"common_name":"North America Nebula","dec":44.33,"name":"NGC 7000","ra":314.69583333,"simbad_url":"https://simbad.cds.unistra.fr/simbad/sim-id?Ident=NGC%207000","source":"sesame","type":"Cl*","type_text":"star cluster"}}