{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":0.08,"best_label":"good","best_window":"05:05\u201305:10","dark_hours":7.54,"date":"2044-08-30","moon_free_dark_hours":5.63,"moon_illumination":55,"moon_separation":145.0,"score":null,"score_astronomy":9,"score_weather":null,"transit_alt":42.9,"transit_local":"08:20","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":0.17,"best_label":"good","best_window":"05:00\u201305:10","dark_hours":7.59,"date":"2044-08-31","moon_free_dark_hours":4.88,"moon_illumination":64,"moon_separation":146.1,"score":null,"score_astronomy":10,"score_weather":null,"transit_alt":42.9,"transit_local":"08:15","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":0.33,"best_label":"good","best_window":"04:55\u201305:15","dark_hours":7.65,"date":"2044-09-01","moon_free_dark_hours":4.0,"moon_illumination":73,"moon_separation":143.6,"score":null,"score_astronomy":13,"score_weather":null,"transit_alt":42.9,"transit_local":"08:10","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":0.42,"best_label":"good","best_window":"04:50\u201305:15","dark_hours":7.7,"date":"2044-09-02","moon_free_dark_hours":3.0,"moon_illumination":81,"moon_separation":138.3,"score":null,"score_astronomy":15,"score_weather":null,"transit_alt":42.9,"transit_local":"08:05","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":0.42,"best_label":"good","best_window":"04:50\u201305:15","dark_hours":7.76,"date":"2044-09-03","moon_free_dark_hours":1.97,"moon_illumination":88,"moon_separation":130.9,"score":null,"score_astronomy":16,"score_weather":null,"transit_alt":42.9,"transit_local":"08:05","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":0.5,"best_label":"good","best_window":"04:45\u201305:15","dark_hours":7.81,"date":"2044-09-04","moon_free_dark_hours":0.88,"moon_illumination":94,"moon_separation":122.2,"score":null,"score_astronomy":17,"score_weather":null,"transit_alt":42.9,"transit_local":"08:00","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":0.42,"best_label":"good","best_window":"04:55\u201305:20","dark_hours":7.87,"date":"2044-09-05","moon_free_dark_hours":0.0,"moon_illumination":98,"moon_separation":112.6,"score":null,"score_astronomy":17,"score_weather":null,"transit_alt":42.9,"transit_local":"07:55","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":0.33,"best_label":"good","best_window":"05:00\u201305:20","dark_hours":7.92,"date":"2044-09-06","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":102.5,"score":null,"score_astronomy":15,"score_weather":null,"transit_alt":42.9,"transit_local":"07:50","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":0.08,"best_label":"good","best_window":"05:15\u201305:20","dark_hours":7.98,"date":"2044-09-07","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":92.0,"score":null,"score_astronomy":13,"score_weather":null,"transit_alt":42.9,"transit_local":"07:45","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":1.17,"best_label":"marginal","best_window":"04:10\u201305:20","dark_hours":8.03,"date":"2044-09-08","moon_free_dark_hours":0.0,"moon_illumination":98,"moon_separation":81.2,"score":null,"score_astronomy":10,"score_weather":null,"transit_alt":42.9,"transit_local":"07:45","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":1.17,"best_label":"marginal","best_window":"04:15\u201305:25","dark_hours":8.09,"date":"2044-09-09","moon_free_dark_hours":0.0,"moon_illumination":94,"moon_separation":70.4,"score":null,"score_astronomy":9,"score_weather":null,"transit_alt":42.9,"transit_local":"07:40","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":1.08,"best_label":"marginal","best_window":"04:20\u201305:25","dark_hours":8.14,"date":"2044-09-10","moon_free_dark_hours":0.0,"moon_illumination":87,"moon_separation":59.9,"score":null,"score_astronomy":8,"score_weather":null,"transit_alt":42.9,"transit_local":"07:35","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":1.17,"best_label":"marginal","best_window":"04:15\u201305:25","dark_hours":8.19,"date":"2044-09-11","moon_free_dark_hours":0.12,"moon_illumination":79,"moon_separation":50.0,"score":null,"score_astronomy":7,"score_weather":null,"transit_alt":42.9,"transit_local":"07:30","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":1.25,"best_label":"marginal","best_window":"04:10\u201305:25","dark_hours":8.25,"date":"2044-09-12","moon_free_dark_hours":0.72,"moon_illumination":69,"moon_separation":41.4,"score":null,"score_astronomy":8,"score_weather":null,"transit_alt":42.9,"transit_local":"07:25","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":1.58,"best_label":"marginal","best_window":"03:55\u201305:30","dark_hours":8.3,"date":"2044-09-13","moon_free_dark_hours":1.48,"moon_illumination":58,"moon_separation":35.5,"score":null,"score_astronomy":11,"score_weather":null,"transit_alt":42.9,"transit_local":"07:25","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":1.83,"best_label":"marginal","best_window":"03:40\u201305:30","dark_hours":8.35,"date":"2044-09-14","moon_free_dark_hours":2.45,"moon_illumination":47,"moon_separation":33.9,"score":null,"score_astronomy":16,"score_weather":null,"transit_alt":42.9,"transit_local":"07:20","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":1.0,"best_label":"good","best_window":"04:30\u201305:30","dark_hours":8.41,"date":"2044-09-15","moon_free_dark_hours":3.6,"moon_illumination":36,"moon_separation":37.3,"score":null,"score_astronomy":22,"score_weather":null,"transit_alt":42.9,"transit_local":"07:15","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":1.33,"best_label":"good","best_window":"04:10\u201305:30","dark_hours":8.46,"date":"2044-09-16","moon_free_dark_hours":4.87,"moon_illumination":25,"moon_separation":44.6,"score":null,"score_astronomy":29,"score_weather":null,"transit_alt":42.9,"transit_local":"07:10","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":1.58,"best_label":"good","best_window":"04:00\u201305:35","dark_hours":8.51,"date":"2044-09-17","moon_free_dark_hours":6.22,"moon_illumination":16,"moon_separation":54.3,"score":null,"score_astronomy":35,"score_weather":null,"transit_alt":42.9,"transit_local":"07:10","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":1.75,"best_label":"good","best_window":"03:50\u201305:35","dark_hours":8.56,"date":"2044-09-18","moon_free_dark_hours":7.55,"moon_illumination":8,"moon_separation":65.2,"score":null,"score_astronomy":40,"score_weather":null,"transit_alt":42.9,"transit_local":"07:05","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":1.83,"best_label":"good","best_window":"03:45\u201305:35","dark_hours":8.61,"date":"2044-09-19","moon_free_dark_hours":8.6,"moon_illumination":3,"moon_separation":76.7,"score":null,"score_astronomy":43,"score_weather":null,"transit_alt":42.9,"transit_local":"07:00","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":1.92,"best_label":"good","best_window":"03:40\u201305:35","dark_hours":8.67,"date":"2044-09-20","moon_free_dark_hours":8.65,"moon_illumination":0,"moon_separation":88.4,"score":null,"score_astronomy":45,"score_weather":null,"transit_alt":42.9,"transit_local":"06:55","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":2.0,"best_label":"good","best_window":"03:40\u201305:40","dark_hours":8.72,"date":"2044-09-21","moon_free_dark_hours":8.7,"moon_illumination":0,"moon_separation":99.9,"score":null,"score_astronomy":47,"score_weather":null,"transit_alt":42.9,"transit_local":"06:50","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":2.08,"best_label":"good","best_window":"03:35\u201305:40","dark_hours":8.77,"date":"2044-09-22","moon_free_dark_hours":8.75,"moon_illumination":3,"moon_separation":111.0,"score":null,"score_astronomy":48,"score_weather":null,"transit_alt":42.9,"transit_local":"06:50","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":2.17,"best_label":"good","best_window":"03:30\u201305:40","dark_hours":8.82,"date":"2044-09-23","moon_free_dark_hours":8.8,"moon_illumination":7,"moon_separation":121.3,"score":null,"score_astronomy":50,"score_weather":null,"transit_alt":42.9,"transit_local":"06:45","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":2.25,"best_label":"good","best_window":"03:25\u201305:40","dark_hours":8.87,"date":"2044-09-24","moon_free_dark_hours":8.87,"moon_illumination":13,"moon_separation":130.6,"score":null,"score_astronomy":52,"score_weather":null,"transit_alt":42.9,"transit_local":"06:40","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":2.42,"best_label":"good","best_window":"03:20\u201305:45","dark_hours":8.92,"date":"2044-09-25","moon_free_dark_hours":8.88,"moon_illumination":21,"moon_separation":138.4,"score":null,"score_astronomy":55,"score_weather":null,"transit_alt":42.9,"transit_local":"06:35","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":2.42,"best_label":"good","best_window":"03:20\u201305:45","dark_hours":8.97,"date":"2044-09-26","moon_free_dark_hours":8.28,"moon_illumination":29,"moon_separation":143.9,"score":null,"score_astronomy":56,"score_weather":null,"transit_alt":42.9,"transit_local":"06:30","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":2.5,"best_label":"good","best_window":"03:15\u201305:45","dark_hours":9.02,"date":"2044-09-27","moon_free_dark_hours":7.57,"moon_illumination":38,"moon_separation":146.2,"score":null,"score_astronomy":57,"score_weather":null,"transit_alt":42.9,"transit_local":"06:30","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":2.58,"best_label":"good","best_window":"03:10\u201305:45","dark_hours":9.07,"date":"2044-09-28","moon_free_dark_hours":6.72,"moon_illumination":48,"moon_separation":144.9,"score":null,"score_astronomy":59,"score_weather":null,"transit_alt":42.9,"transit_local":"06:25","verdict":"unknown","weather_source":"none","weekday":"Wed"}],"note":"score_astronomy for every night; score_weather/score only where a forecast (next 4 days) or ERA5 history exists \u2014 null otherwise","start":"2044-08-30","target":{"common_name":"Great Orion Nebula","dec":-5.3876,"name":"M 42","ra":83.8201,"simbad_url":"https://simbad.cds.unistra.fr/simbad/sim-id?Ident=M42","source":"sesame","type":"HII","type_text":"HII region \u2014 a star-forming nebula"}}