{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":7.83,"best_label":"good","best_window":"21:05\u201304:55","dark_hours":8.47,"date":"2039-09-17","moon_free_dark_hours":8.45,"moon_illumination":0,"moon_separation":117.0,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.2,"transit_local":"22:35","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":7.83,"best_label":"good","best_window":"21:00\u201304:50","dark_hours":8.52,"date":"2039-09-18","moon_free_dark_hours":8.5,"moon_illumination":1,"moon_separation":114.8,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.2,"transit_local":"22:30","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":7.75,"best_label":"good","best_window":"21:00\u201304:45","dark_hours":8.57,"date":"2039-09-19","moon_free_dark_hours":8.57,"moon_illumination":3,"moon_separation":111.1,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.2,"transit_local":"22:25","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":7.75,"best_label":"good","best_window":"21:00\u201304:45","dark_hours":8.62,"date":"2039-09-20","moon_free_dark_hours":8.62,"moon_illumination":8,"moon_separation":106.2,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.2,"transit_local":"22:25","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":7.75,"best_label":"good","best_window":"20:55\u201304:40","dark_hours":8.68,"date":"2039-09-21","moon_free_dark_hours":8.37,"moon_illumination":16,"moon_separation":100.4,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.2,"transit_local":"22:20","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":7.67,"best_label":"good","best_window":"20:55\u201304:35","dark_hours":8.73,"date":"2039-09-22","moon_free_dark_hours":7.83,"moon_illumination":25,"moon_separation":94.0,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.2,"transit_local":"22:15","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":7.58,"best_label":"good","best_window":"20:55\u201304:30","dark_hours":8.78,"date":"2039-09-23","moon_free_dark_hours":7.2,"moon_illumination":36,"moon_separation":87.4,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.2,"transit_local":"22:10","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":7.67,"best_label":"good","best_window":"20:50\u201304:30","dark_hours":8.83,"date":"2039-09-24","moon_free_dark_hours":6.43,"moon_illumination":47,"moon_separation":81.0,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.2,"transit_local":"22:05","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":7.58,"best_label":"good","best_window":"20:50\u201304:25","dark_hours":8.88,"date":"2039-09-25","moon_free_dark_hours":5.5,"moon_illumination":58,"moon_separation":75.1,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.2,"transit_local":"22:05","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":7.58,"best_label":"good","best_window":"20:45\u201304:20","dark_hours":8.93,"date":"2039-09-26","moon_free_dark_hours":4.45,"moon_illumination":69,"moon_separation":70.0,"score":null,"score_astronomy":96,"score_weather":null,"transit_alt":87.2,"transit_local":"22:00","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":7.5,"best_label":"good","best_window":"20:45\u201304:15","dark_hours":8.98,"date":"2039-09-27","moon_free_dark_hours":3.28,"moon_illumination":79,"moon_separation":66.0,"score":null,"score_astronomy":88,"score_weather":null,"transit_alt":87.2,"transit_local":"21:55","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":7.42,"best_label":"good","best_window":"20:45\u201304:10","dark_hours":9.03,"date":"2039-09-28","moon_free_dark_hours":2.12,"moon_illumination":87,"moon_separation":63.5,"score":null,"score_astronomy":78,"score_weather":null,"transit_alt":87.2,"transit_local":"21:50","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":1.42,"best_label":"good","best_window":"20:40\u201322:05","dark_hours":9.08,"date":"2039-09-29","moon_free_dark_hours":0.95,"moon_illumination":94,"moon_separation":62.5,"score":null,"score_astronomy":64,"score_weather":null,"transit_alt":87.2,"transit_local":"21:50","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":0.92,"best_label":"good","best_window":"20:40\u201321:35","dark_hours":9.12,"date":"2039-09-30","moon_free_dark_hours":0.0,"moon_illumination":98,"moon_separation":63.2,"score":null,"score_astronomy":63,"score_weather":null,"transit_alt":87.2,"transit_local":"21:45","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":1.25,"best_label":"good","best_window":"20:40\u201321:55","dark_hours":9.17,"date":"2039-10-01","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":65.4,"score":null,"score_astronomy":65,"score_weather":null,"transit_alt":87.2,"transit_local":"21:40","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":2.08,"best_label":"good","best_window":"20:35\u201322:40","dark_hours":9.22,"date":"2039-10-02","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":68.8,"score":null,"score_astronomy":69,"score_weather":null,"transit_alt":87.2,"transit_local":"21:35","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":3.33,"best_label":"good","best_window":"20:35\u201323:55","dark_hours":9.27,"date":"2039-10-03","moon_free_dark_hours":0.0,"moon_illumination":97,"moon_separation":73.1,"score":null,"score_astronomy":73,"score_weather":null,"transit_alt":87.2,"transit_local":"21:30","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":4.33,"best_label":"good","best_window":"20:35\u201300:55","dark_hours":9.32,"date":"2039-10-04","moon_free_dark_hours":0.0,"moon_illumination":93,"moon_separation":78.1,"score":null,"score_astronomy":78,"score_weather":null,"transit_alt":87.2,"transit_local":"21:30","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":5.25,"best_label":"good","best_window":"20:30\u201301:45","dark_hours":9.36,"date":"2039-10-05","moon_free_dark_hours":0.33,"moon_illumination":87,"moon_separation":83.4,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.2,"transit_local":"21:25","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":6.08,"best_label":"good","best_window":"20:30\u201302:35","dark_hours":9.41,"date":"2039-10-06","moon_free_dark_hours":0.87,"moon_illumination":80,"moon_separation":88.8,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.2,"transit_local":"21:20","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":6.58,"best_label":"good","best_window":"20:30\u201303:05","dark_hours":9.46,"date":"2039-10-07","moon_free_dark_hours":1.47,"moon_illumination":72,"moon_separation":94.3,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.2,"transit_local":"21:15","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":6.75,"best_label":"good","best_window":"20:25\u201303:10","dark_hours":9.5,"date":"2039-10-08","moon_free_dark_hours":2.18,"moon_illumination":64,"moon_separation":99.6,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.2,"transit_local":"21:10","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":6.83,"best_label":"good","best_window":"20:25\u201303:15","dark_hours":9.55,"date":"2039-10-09","moon_free_dark_hours":2.98,"moon_illumination":54,"moon_separation":104.5,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.2,"transit_local":"21:10","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":6.83,"best_label":"good","best_window":"20:25\u201303:15","dark_hours":9.59,"date":"2039-10-10","moon_free_dark_hours":3.92,"moon_illumination":45,"moon_separation":109.0,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.2,"transit_local":"21:05","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":6.92,"best_label":"good","best_window":"20:20\u201303:15","dark_hours":9.64,"date":"2039-10-11","moon_free_dark_hours":4.93,"moon_illumination":35,"moon_separation":112.8,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.2,"transit_local":"21:00","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":6.92,"best_label":"good","best_window":"20:20\u201303:15","dark_hours":9.68,"date":"2039-10-12","moon_free_dark_hours":6.0,"moon_illumination":26,"moon_separation":115.6,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.2,"transit_local":"20:55","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":6.92,"best_label":"good","best_window":"20:20\u201303:15","dark_hours":9.73,"date":"2039-10-13","moon_free_dark_hours":7.13,"moon_illumination":18,"moon_separation":117.1,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.2,"transit_local":"20:55","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":6.92,"best_label":"good","best_window":"20:15\u201303:10","dark_hours":9.77,"date":"2039-10-14","moon_free_dark_hours":8.28,"moon_illumination":10,"moon_separation":117.3,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.2,"transit_local":"20:50","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":6.83,"best_label":"good","best_window":"20:15\u201303:05","dark_hours":9.81,"date":"2039-10-15","moon_free_dark_hours":9.48,"moon_illumination":5,"moon_separation":115.8,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.2,"transit_local":"20:45","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":6.75,"best_label":"good","best_window":"20:15\u201303:00","dark_hours":9.86,"date":"2039-10-16","moon_free_dark_hours":9.83,"moon_illumination":1,"moon_separation":112.7,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.2,"transit_local":"20:40","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":"2039-09-17","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"}}