{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":3.08,"best_label":"good","best_window":"02:50\u201305:55","dark_hours":9.47,"date":"2042-10-07","moon_free_dark_hours":5.1,"moon_illumination":32,"moon_separation":53.7,"score":null,"score_astronomy":53,"score_weather":null,"transit_alt":42.9,"transit_local":"05:50","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":3.33,"best_label":"good","best_window":"02:35\u201305:55","dark_hours":9.51,"date":"2042-10-08","moon_free_dark_hours":6.25,"moon_illumination":23,"moon_separation":63.2,"score":null,"score_astronomy":63,"score_weather":null,"transit_alt":42.9,"transit_local":"05:45","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":3.5,"best_label":"good","best_window":"02:30\u201306:00","dark_hours":9.56,"date":"2042-10-09","moon_free_dark_hours":7.37,"moon_illumination":15,"moon_separation":73.0,"score":null,"score_astronomy":71,"score_weather":null,"transit_alt":42.9,"transit_local":"05:45","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":3.58,"best_label":"good","best_window":"02:25\u201306:00","dark_hours":9.61,"date":"2042-10-10","moon_free_dark_hours":8.43,"moon_illumination":9,"moon_separation":83.0,"score":null,"score_astronomy":77,"score_weather":null,"transit_alt":42.9,"transit_local":"05:40","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":3.67,"best_label":"good","best_window":"02:20\u201306:00","dark_hours":9.65,"date":"2042-10-11","moon_free_dark_hours":9.48,"moon_illumination":4,"moon_separation":93.0,"score":null,"score_astronomy":80,"score_weather":null,"transit_alt":42.9,"transit_local":"05:35","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":3.75,"best_label":"good","best_window":"02:15\u201306:00","dark_hours":9.69,"date":"2042-10-12","moon_free_dark_hours":9.68,"moon_illumination":1,"moon_separation":102.9,"score":null,"score_astronomy":82,"score_weather":null,"transit_alt":42.9,"transit_local":"05:30","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":3.75,"best_label":"good","best_window":"02:15\u201306:00","dark_hours":9.74,"date":"2042-10-13","moon_free_dark_hours":9.72,"moon_illumination":0,"moon_separation":112.5,"score":null,"score_astronomy":83,"score_weather":null,"transit_alt":42.9,"transit_local":"05:25","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":3.92,"best_label":"good","best_window":"02:10\u201306:05","dark_hours":9.78,"date":"2042-10-14","moon_free_dark_hours":9.77,"moon_illumination":1,"moon_separation":121.8,"score":null,"score_astronomy":85,"score_weather":null,"transit_alt":42.9,"transit_local":"05:25","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":4.0,"best_label":"good","best_window":"02:05\u201306:05","dark_hours":9.83,"date":"2042-10-15","moon_free_dark_hours":9.8,"moon_illumination":3,"moon_separation":130.4,"score":null,"score_astronomy":86,"score_weather":null,"transit_alt":42.9,"transit_local":"05:20","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":4.08,"best_label":"good","best_window":"02:00\u201306:05","dark_hours":9.87,"date":"2042-10-16","moon_free_dark_hours":9.85,"moon_illumination":7,"moon_separation":138.0,"score":null,"score_astronomy":88,"score_weather":null,"transit_alt":42.9,"transit_local":"05:15","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":4.17,"best_label":"good","best_window":"01:55\u201306:05","dark_hours":9.91,"date":"2042-10-17","moon_free_dark_hours":9.88,"moon_illumination":13,"moon_separation":143.6,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"05:10","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":4.17,"best_label":"good","best_window":"01:55\u201306:05","dark_hours":9.95,"date":"2042-10-18","moon_free_dark_hours":9.5,"moon_illumination":20,"moon_separation":146.4,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"05:10","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":4.33,"best_label":"good","best_window":"01:50\u201306:10","dark_hours":10.0,"date":"2042-10-19","moon_free_dark_hours":8.77,"moon_illumination":28,"moon_separation":145.5,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"05:05","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":4.42,"best_label":"good","best_window":"01:45\u201306:10","dark_hours":10.04,"date":"2042-10-20","moon_free_dark_hours":7.85,"moon_illumination":38,"moon_separation":140.8,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"05:00","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":4.5,"best_label":"good","best_window":"01:40\u201306:10","dark_hours":10.08,"date":"2042-10-21","moon_free_dark_hours":6.77,"moon_illumination":48,"moon_separation":133.4,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"04:55","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":4.5,"best_label":"good","best_window":"01:40\u201306:10","dark_hours":10.12,"date":"2042-10-22","moon_free_dark_hours":5.6,"moon_illumination":58,"moon_separation":124.1,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"04:50","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":4.58,"best_label":"good","best_window":"01:40\u201306:15","dark_hours":10.16,"date":"2042-10-23","moon_free_dark_hours":4.37,"moon_illumination":69,"moon_separation":113.5,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"04:50","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":4.5,"best_label":"good","best_window":"01:45\u201306:15","dark_hours":10.2,"date":"2042-10-24","moon_free_dark_hours":3.1,"moon_illumination":79,"moon_separation":102.1,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"04:45","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":4.33,"best_label":"good","best_window":"01:55\u201305:15","dark_hours":10.24,"date":"2042-10-25","moon_free_dark_hours":1.83,"moon_illumination":88,"moon_separation":90.0,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"03:40","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":2.83,"best_label":"good","best_window":"02:25\u201305:15","dark_hours":10.28,"date":"2042-10-26","moon_free_dark_hours":0.55,"moon_illumination":94,"moon_separation":77.6,"score":null,"score_astronomy":76,"score_weather":null,"transit_alt":42.9,"transit_local":"03:35","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":5.0,"best_label":"marginal","best_window":"00:15\u201305:15","dark_hours":10.32,"date":"2042-10-27","moon_free_dark_hours":0.0,"moon_illumination":99,"moon_separation":65.2,"score":null,"score_astronomy":41,"score_weather":null,"transit_alt":42.9,"transit_local":"03:30","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":4.67,"best_label":"marginal","best_window":"00:40\u201305:20","dark_hours":10.36,"date":"2042-10-28","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":53.5,"score":null,"score_astronomy":27,"score_weather":null,"transit_alt":42.9,"transit_local":"03:30","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":2.83,"best_label":"marginal","best_window":"02:30\u201305:20","dark_hours":10.4,"date":"2042-10-29","moon_free_dark_hours":0.0,"moon_illumination":98,"moon_separation":43.3,"score":null,"score_astronomy":17,"score_weather":null,"transit_alt":42.9,"transit_local":"03:25","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":1.0,"best_label":"marginal","best_window":"04:20\u201305:20","dark_hours":10.43,"date":"2042-10-30","moon_free_dark_hours":0.0,"moon_illumination":93,"moon_separation":36.1,"score":null,"score_astronomy":13,"score_weather":null,"transit_alt":42.9,"transit_local":"03:20","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":4.83,"best_label":"marginal","best_window":"00:30\u201305:20","dark_hours":10.47,"date":"2042-10-31","moon_free_dark_hours":0.25,"moon_illumination":86,"moon_separation":33.4,"score":null,"score_astronomy":14,"score_weather":null,"transit_alt":42.9,"transit_local":"03:15","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":5.5,"best_label":"marginal","best_window":"23:55\u201305:25","dark_hours":10.51,"date":"2042-11-01","moon_free_dark_hours":1.23,"moon_illumination":78,"moon_separation":36.0,"score":null,"score_astronomy":23,"score_weather":null,"transit_alt":42.9,"transit_local":"03:15","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":5.92,"best_label":"marginal","best_window":"23:30\u201305:25","dark_hours":10.54,"date":"2042-11-02","moon_free_dark_hours":2.35,"moon_illumination":68,"moon_separation":42.5,"score":null,"score_astronomy":37,"score_weather":null,"transit_alt":42.9,"transit_local":"03:10","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":2.33,"best_label":"good","best_window":"00:30\u201302:50","dark_hours":10.58,"date":"2042-11-03","moon_free_dark_hours":3.52,"moon_illumination":58,"moon_separation":51.1,"score":null,"score_astronomy":55,"score_weather":null,"transit_alt":42.9,"transit_local":"03:05","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":5.33,"best_label":"good","best_window":"00:05\u201305:25","dark_hours":10.61,"date":"2042-11-04","moon_free_dark_hours":4.7,"moon_illumination":47,"moon_separation":60.6,"score":null,"score_astronomy":70,"score_weather":null,"transit_alt":42.9,"transit_local":"03:00","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":5.67,"best_label":"good","best_window":"23:45\u201305:25","dark_hours":10.65,"date":"2042-11-05","moon_free_dark_hours":5.82,"moon_illumination":38,"moon_separation":70.4,"score":null,"score_astronomy":81,"score_weather":null,"transit_alt":42.9,"transit_local":"02:55","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":"2042-10-07","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"}}
