{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":4.83,"best_label":"good","best_window":"01:25\u201306:15","dark_hours":10.24,"date":"2046-10-25","moon_free_dark_hours":7.93,"moon_illumination":18,"moon_separation":79.4,"score":null,"score_astronomy":88,"score_weather":null,"transit_alt":42.9,"transit_local":"04:40","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":4.92,"best_label":"good","best_window":"01:20\u201306:15","dark_hours":10.28,"date":"2046-10-26","moon_free_dark_hours":9.25,"moon_illumination":10,"moon_separation":92.0,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"04:35","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":4.92,"best_label":"good","best_window":"01:20\u201305:15","dark_hours":10.32,"date":"2046-10-27","moon_free_dark_hours":10.3,"moon_illumination":4,"moon_separation":104.7,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"03:30","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":5.08,"best_label":"good","best_window":"00:15\u201305:20","dark_hours":10.36,"date":"2046-10-28","moon_free_dark_hours":10.33,"moon_illumination":1,"moon_separation":117.2,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"03:30","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":5.17,"best_label":"good","best_window":"00:10\u201305:20","dark_hours":10.4,"date":"2046-10-29","moon_free_dark_hours":10.37,"moon_illumination":0,"moon_separation":129.0,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"03:25","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":5.25,"best_label":"good","best_window":"00:05\u201305:20","dark_hours":10.43,"date":"2046-10-30","moon_free_dark_hours":10.42,"moon_illumination":3,"moon_separation":139.0,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"03:20","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":5.33,"best_label":"good","best_window":"00:00\u201305:20","dark_hours":10.47,"date":"2046-10-31","moon_free_dark_hours":10.47,"moon_illumination":8,"moon_separation":146.1,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"03:15","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":5.42,"best_label":"good","best_window":"00:00\u201305:25","dark_hours":10.51,"date":"2046-11-01","moon_free_dark_hours":10.03,"moon_illumination":16,"moon_separation":148.5,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"03:15","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":5.5,"best_label":"good","best_window":"23:55\u201305:25","dark_hours":10.54,"date":"2046-11-02","moon_free_dark_hours":8.97,"moon_illumination":25,"moon_separation":145.6,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"03:10","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":5.58,"best_label":"good","best_window":"23:50\u201305:25","dark_hours":10.58,"date":"2046-11-03","moon_free_dark_hours":7.85,"moon_illumination":34,"moon_separation":139.0,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"03:05","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":5.67,"best_label":"good","best_window":"23:45\u201305:25","dark_hours":10.61,"date":"2046-11-04","moon_free_dark_hours":6.75,"moon_illumination":44,"moon_separation":130.5,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"03:00","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":5.67,"best_label":"good","best_window":"23:45\u201305:25","dark_hours":10.65,"date":"2046-11-05","moon_free_dark_hours":5.68,"moon_illumination":54,"moon_separation":121.0,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"02:55","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":5.67,"best_label":"good","best_window":"23:50\u201305:30","dark_hours":10.68,"date":"2046-11-06","moon_free_dark_hours":4.65,"moon_illumination":63,"moon_separation":111.2,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"02:55","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":5.67,"best_label":"good","best_window":"23:50\u201305:30","dark_hours":10.72,"date":"2046-11-07","moon_free_dark_hours":3.67,"moon_illumination":72,"moon_separation":101.2,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"02:50","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":5.5,"best_label":"good","best_window":"00:00\u201305:30","dark_hours":10.75,"date":"2046-11-08","moon_free_dark_hours":2.68,"moon_illumination":80,"moon_separation":91.1,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"02:45","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":4.58,"best_label":"good","best_window":"00:55\u201305:30","dark_hours":10.78,"date":"2046-11-09","moon_free_dark_hours":1.72,"moon_illumination":87,"moon_separation":81.0,"score":null,"score_astronomy":87,"score_weather":null,"transit_alt":42.9,"transit_local":"02:40","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":2.75,"best_label":"good","best_window":"02:45\u201305:30","dark_hours":10.81,"date":"2046-11-10","moon_free_dark_hours":0.72,"moon_illumination":93,"moon_separation":71.1,"score":null,"score_astronomy":82,"score_weather":null,"transit_alt":42.9,"transit_local":"02:35","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":6.17,"best_label":"marginal","best_window":"23:25\u201305:35","dark_hours":10.84,"date":"2046-11-11","moon_free_dark_hours":0.0,"moon_illumination":97,"moon_separation":61.3,"score":null,"score_astronomy":45,"score_weather":null,"transit_alt":42.9,"transit_local":"02:35","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":5.83,"best_label":"marginal","best_window":"23:45\u201305:35","dark_hours":10.87,"date":"2046-11-12","moon_free_dark_hours":0.0,"moon_illumination":99,"moon_separation":51.9,"score":null,"score_astronomy":31,"score_weather":null,"transit_alt":42.9,"transit_local":"02:30","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":3.58,"best_label":"marginal","best_window":"02:00\u201305:35","dark_hours":10.91,"date":"2046-11-13","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":43.3,"score":null,"score_astronomy":21,"score_weather":null,"transit_alt":42.9,"transit_local":"02:25","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":0.83,"best_label":"marginal","best_window":"04:25\u201305:15","dark_hours":10.93,"date":"2046-11-14","moon_free_dark_hours":0.0,"moon_illumination":98,"moon_separation":36.3,"score":null,"score_astronomy":14,"score_weather":null,"transit_alt":42.9,"transit_local":"02:20","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":10.96,"date":"2046-11-15","moon_free_dark_hours":0.0,"moon_illumination":95,"moon_separation":32.0,"score":null,"score_astronomy":12,"score_weather":null,"transit_alt":42.9,"transit_local":"02:20","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":0.75,"best_label":"marginal","best_window":"23:25\u201300:10","dark_hours":10.99,"date":"2046-11-16","moon_free_dark_hours":0.33,"moon_illumination":90,"moon_separation":31.9,"score":null,"score_astronomy":15,"score_weather":null,"transit_alt":42.9,"transit_local":"02:15","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":6.25,"best_label":"marginal","best_window":"22:50\u201305:05","dark_hours":11.02,"date":"2046-11-17","moon_free_dark_hours":1.38,"moon_illumination":83,"moon_separation":36.2,"score":null,"score_astronomy":26,"score_weather":null,"transit_alt":42.9,"transit_local":"02:10","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":7.0,"best_label":"marginal","best_window":"22:25\u201305:25","dark_hours":11.05,"date":"2046-11-18","moon_free_dark_hours":2.52,"moon_illumination":74,"moon_separation":43.7,"score":null,"score_astronomy":41,"score_weather":null,"transit_alt":42.9,"transit_local":"02:05","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":2.25,"best_label":"good","best_window":"23:20\u201301:35","dark_hours":11.07,"date":"2046-11-19","moon_free_dark_hours":3.7,"moon_illumination":64,"moon_separation":53.2,"score":null,"score_astronomy":61,"score_weather":null,"transit_alt":42.9,"transit_local":"02:00","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":5.67,"best_label":"good","best_window":"22:45\u201304:25","dark_hours":11.1,"date":"2046-11-20","moon_free_dark_hours":4.88,"moon_illumination":54,"moon_separation":64.0,"score":null,"score_astronomy":81,"score_weather":null,"transit_alt":42.9,"transit_local":"02:00","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":6.25,"best_label":"good","best_window":"22:40\u201304:55","dark_hours":11.12,"date":"2046-11-21","moon_free_dark_hours":6.08,"moon_illumination":43,"moon_separation":75.5,"score":null,"score_astronomy":86,"score_weather":null,"transit_alt":42.9,"transit_local":"01:55","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":6.42,"best_label":"good","best_window":"22:35\u201305:00","dark_hours":11.15,"date":"2046-11-22","moon_free_dark_hours":7.3,"moon_illumination":32,"moon_separation":87.6,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"01:50","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":6.5,"best_label":"good","best_window":"22:30\u201305:00","dark_hours":11.17,"date":"2046-11-23","moon_free_dark_hours":8.57,"moon_illumination":21,"moon_separation":99.9,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"01:45","verdict":"unknown","weather_source":"none","weekday":"Fri"}],"note":"score_astronomy for every night; score_weather/score only where a forecast (next 4 days) or ERA5 history exists \u2014 null otherwise","start":"2046-10-25","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"}}