{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":4.92,"best_label":"marginal","best_window":"00:25\u201305:20","dark_hours":10.41,"date":"2045-10-29","moon_free_dark_hours":0.7,"moon_illumination":82,"moon_separation":32.8,"score":null,"score_astronomy":16,"score_weather":null,"transit_alt":42.9,"transit_local":"03:25","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":5.42,"best_label":"marginal","best_window":"23:55\u201305:20","dark_hours":10.44,"date":"2045-10-30","moon_free_dark_hours":1.8,"moon_illumination":73,"moon_separation":35.8,"score":null,"score_astronomy":27,"score_weather":null,"transit_alt":42.9,"transit_local":"03:20","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":5.75,"best_label":"marginal","best_window":"23:35\u201305:20","dark_hours":10.48,"date":"2045-10-31","moon_free_dark_hours":3.0,"moon_illumination":63,"moon_separation":42.7,"score":null,"score_astronomy":42,"score_weather":null,"transit_alt":42.9,"transit_local":"03:15","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":4.17,"best_label":"good","best_window":"00:25\u201304:35","dark_hours":10.52,"date":"2045-11-01","moon_free_dark_hours":4.27,"moon_illumination":52,"moon_separation":52.0,"score":null,"score_astronomy":62,"score_weather":null,"transit_alt":42.9,"transit_local":"03:10","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":5.5,"best_label":"good","best_window":"23:55\u201305:25","dark_hours":10.55,"date":"2045-11-02","moon_free_dark_hours":5.55,"moon_illumination":41,"moon_separation":62.8,"score":null,"score_astronomy":77,"score_weather":null,"transit_alt":42.9,"transit_local":"03:10","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":5.58,"best_label":"good","best_window":"23:50\u201305:25","dark_hours":10.59,"date":"2045-11-03","moon_free_dark_hours":6.82,"moon_illumination":30,"moon_separation":74.4,"score":null,"score_astronomy":86,"score_weather":null,"transit_alt":42.9,"transit_local":"03:05","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":5.67,"best_label":"good","best_window":"23:45\u201305:25","dark_hours":10.62,"date":"2045-11-04","moon_free_dark_hours":8.07,"moon_illumination":20,"moon_separation":86.3,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"03:00","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":5.75,"best_label":"good","best_window":"23:40\u201305:25","dark_hours":10.66,"date":"2045-11-05","moon_free_dark_hours":9.32,"moon_illumination":11,"moon_separation":98.3,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"02:55","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":5.83,"best_label":"good","best_window":"23:40\u201305:30","dark_hours":10.69,"date":"2045-11-06","moon_free_dark_hours":10.58,"moon_illumination":5,"moon_separation":110.2,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"02:50","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":5.92,"best_label":"good","best_window":"23:35\u201305:30","dark_hours":10.72,"date":"2045-11-07","moon_free_dark_hours":10.7,"moon_illumination":1,"moon_separation":121.5,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"02:50","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":6.0,"best_label":"good","best_window":"23:30\u201305:30","dark_hours":10.76,"date":"2045-11-08","moon_free_dark_hours":10.73,"moon_illumination":0,"moon_separation":131.7,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"02:45","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":6.08,"best_label":"good","best_window":"23:25\u201305:30","dark_hours":10.79,"date":"2045-11-09","moon_free_dark_hours":10.77,"moon_illumination":1,"moon_separation":140.2,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"02:40","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":6.17,"best_label":"good","best_window":"23:20\u201305:30","dark_hours":10.82,"date":"2045-11-10","moon_free_dark_hours":10.8,"moon_illumination":5,"moon_separation":145.8,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"02:35","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":6.25,"best_label":"good","best_window":"23:20\u201305:35","dark_hours":10.85,"date":"2045-11-11","moon_free_dark_hours":10.83,"moon_illumination":10,"moon_separation":147.2,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"02:30","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":6.33,"best_label":"good","best_window":"23:15\u201305:35","dark_hours":10.88,"date":"2045-11-12","moon_free_dark_hours":9.97,"moon_illumination":17,"moon_separation":144.4,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"02:30","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":6.42,"best_label":"good","best_window":"23:10\u201305:35","dark_hours":10.91,"date":"2045-11-13","moon_free_dark_hours":8.92,"moon_illumination":25,"moon_separation":138.4,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"02:25","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":6.5,"best_label":"good","best_window":"23:05\u201305:35","dark_hours":10.94,"date":"2045-11-14","moon_free_dark_hours":7.87,"moon_illumination":34,"moon_separation":130.5,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"02:20","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":6.58,"best_label":"good","best_window":"23:00\u201305:35","dark_hours":10.97,"date":"2045-11-15","moon_free_dark_hours":6.83,"moon_illumination":43,"moon_separation":121.7,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"02:15","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":6.42,"best_label":"good","best_window":"23:05\u201305:30","dark_hours":11.0,"date":"2045-11-16","moon_free_dark_hours":5.82,"moon_illumination":53,"moon_separation":112.3,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"02:15","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":6.42,"best_label":"good","best_window":"23:05\u201305:30","dark_hours":11.03,"date":"2045-11-17","moon_free_dark_hours":4.82,"moon_illumination":62,"moon_separation":102.5,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"02:10","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":6.17,"best_label":"good","best_window":"23:15\u201305:25","dark_hours":11.05,"date":"2045-11-18","moon_free_dark_hours":3.82,"moon_illumination":71,"moon_separation":92.5,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"02:05","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":5.75,"best_label":"good","best_window":"23:35\u201305:20","dark_hours":11.08,"date":"2045-11-19","moon_free_dark_hours":2.82,"moon_illumination":79,"moon_separation":82.4,"score":null,"score_astronomy":88,"score_weather":null,"transit_alt":42.9,"transit_local":"02:00","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":3.92,"best_label":"good","best_window":"01:20\u201305:15","dark_hours":11.1,"date":"2045-11-20","moon_free_dark_hours":1.77,"moon_illumination":86,"moon_separation":72.1,"score":null,"score_astronomy":84,"score_weather":null,"transit_alt":42.9,"transit_local":"01:55","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":0.08,"best_label":"good","best_window":"05:05\u201305:10","dark_hours":11.13,"date":"2045-11-21","moon_free_dark_hours":0.68,"moon_illumination":93,"moon_separation":61.9,"score":null,"score_astronomy":58,"score_weather":null,"transit_alt":42.9,"transit_local":"01:55","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":6.5,"best_label":"marginal","best_window":"23:00\u201305:30","dark_hours":11.15,"date":"2045-11-22","moon_free_dark_hours":0.0,"moon_illumination":97,"moon_separation":52.1,"score":null,"score_astronomy":35,"score_weather":null,"transit_alt":42.9,"transit_local":"01:50","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":3.75,"best_label":"marginal","best_window":"01:20\u201305:05","dark_hours":11.18,"date":"2045-11-23","moon_free_dark_hours":0.0,"moon_illumination":99,"moon_separation":43.1,"score":null,"score_astronomy":22,"score_weather":null,"transit_alt":42.9,"transit_local":"01:45","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":11.2,"date":"2045-11-24","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":36.1,"score":null,"score_astronomy":14,"score_weather":null,"transit_alt":42.9,"transit_local":"01:40","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":11.22,"date":"2045-11-25","moon_free_dark_hours":0.0,"moon_illumination":97,"moon_separation":32.8,"score":null,"score_astronomy":11,"score_weather":null,"transit_alt":42.9,"transit_local":"01:35","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":1.08,"best_label":"marginal","best_window":"22:45\u201323:50","dark_hours":11.24,"date":"2045-11-26","moon_free_dark_hours":0.0,"moon_illumination":93,"moon_separation":34.4,"score":null,"score_astronomy":16,"score_weather":null,"transit_alt":42.9,"transit_local":"01:35","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":6.33,"best_label":"marginal","best_window":"22:05\u201304:25","dark_hours":11.26,"date":"2045-11-27","moon_free_dark_hours":1.15,"moon_illumination":86,"moon_separation":40.5,"score":null,"score_astronomy":28,"score_weather":null,"transit_alt":42.9,"transit_local":"01:30","verdict":"unknown","weather_source":"none","weekday":"Mon"}],"note":"score_astronomy for every night; score_weather/score only where a forecast (next 4 days) or ERA5 history exists \u2014 null otherwise","start":"2045-10-29","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"}}
