{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":6.0,"best_label":"good","best_window":"23:30\u201305:30","dark_hours":10.75,"date":"2029-11-08","moon_free_dark_hours":10.53,"moon_illumination":11,"moon_separation":151.1,"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":6.08,"best_label":"good","best_window":"23:25\u201305:30","dark_hours":10.79,"date":"2029-11-09","moon_free_dark_hours":9.42,"moon_illumination":19,"moon_separation":148.4,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"02:40","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":6.17,"best_label":"good","best_window":"23:20\u201305:30","dark_hours":10.82,"date":"2029-11-10","moon_free_dark_hours":8.28,"moon_illumination":28,"moon_separation":141.0,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"02:35","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":6.25,"best_label":"good","best_window":"23:20\u201305:35","dark_hours":10.85,"date":"2029-11-11","moon_free_dark_hours":7.15,"moon_illumination":39,"moon_separation":131.5,"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":6.25,"best_label":"good","best_window":"23:20\u201305:35","dark_hours":10.88,"date":"2029-11-12","moon_free_dark_hours":6.05,"moon_illumination":49,"moon_separation":121.1,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"02:30","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":6.25,"best_label":"good","best_window":"23:20\u201305:35","dark_hours":10.91,"date":"2029-11-13","moon_free_dark_hours":5.02,"moon_illumination":59,"moon_separation":110.5,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"02:25","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":6.17,"best_label":"good","best_window":"23:25\u201305:35","dark_hours":10.94,"date":"2029-11-14","moon_free_dark_hours":4.02,"moon_illumination":68,"moon_separation":99.8,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"02:20","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":6.08,"best_label":"good","best_window":"23:30\u201305:35","dark_hours":10.97,"date":"2029-11-15","moon_free_dark_hours":3.03,"moon_illumination":77,"moon_separation":89.2,"score":null,"score_astronomy":88,"score_weather":null,"transit_alt":42.9,"transit_local":"02:15","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":5.0,"best_label":"good","best_window":"00:30\u201305:30","dark_hours":11.0,"date":"2029-11-16","moon_free_dark_hours":2.07,"moon_illumination":84,"moon_separation":78.8,"score":null,"score_astronomy":86,"score_weather":null,"transit_alt":42.9,"transit_local":"02:10","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":2.83,"best_label":"good","best_window":"02:40\u201305:30","dark_hours":11.02,"date":"2029-11-17","moon_free_dark_hours":1.1,"moon_illumination":91,"moon_separation":68.6,"score":null,"score_astronomy":81,"score_weather":null,"transit_alt":42.9,"transit_local":"02:10","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":6.67,"best_label":"marginal","best_window":"23:00\u201305:40","dark_hours":11.05,"date":"2029-11-18","moon_free_dark_hours":0.12,"moon_illumination":95,"moon_separation":58.6,"score":null,"score_astronomy":45,"score_weather":null,"transit_alt":42.9,"transit_local":"02:05","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":6.25,"best_label":"marginal","best_window":"23:25\u201305:40","dark_hours":11.08,"date":"2029-11-19","moon_free_dark_hours":0.0,"moon_illumination":98,"moon_separation":49.1,"score":null,"score_astronomy":31,"score_weather":null,"transit_alt":42.9,"transit_local":"02:00","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":3.08,"best_label":"marginal","best_window":"02:10\u201305:15","dark_hours":11.1,"date":"2029-11-20","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":40.5,"score":null,"score_astronomy":20,"score_weather":null,"transit_alt":42.9,"transit_local":"01:55","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":11.13,"date":"2029-11-21","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":33.5,"score":null,"score_astronomy":13,"score_weather":null,"transit_alt":42.9,"transit_local":"01:55","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":11.15,"date":"2029-11-22","moon_free_dark_hours":0.0,"moon_illumination":97,"moon_separation":29.3,"score":null,"score_astronomy":10,"score_weather":null,"transit_alt":42.9,"transit_local":"01:50","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":11.17,"date":"2029-11-23","moon_free_dark_hours":0.18,"moon_illumination":93,"moon_separation":29.4,"score":null,"score_astronomy":13,"score_weather":null,"transit_alt":42.9,"transit_local":"01:45","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":4.75,"best_label":"marginal","best_window":"22:25\u201303:10","dark_hours":11.2,"date":"2029-11-24","moon_free_dark_hours":1.15,"moon_illumination":87,"moon_separation":33.9,"score":null,"score_astronomy":22,"score_weather":null,"transit_alt":42.9,"transit_local":"01:40","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":6.75,"best_label":"marginal","best_window":"22:00\u201304:45","dark_hours":11.22,"date":"2029-11-25","moon_free_dark_hours":2.2,"moon_illumination":80,"moon_separation":41.5,"score":null,"score_astronomy":37,"score_weather":null,"transit_alt":42.9,"transit_local":"01:35","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":7.25,"best_label":"marginal","best_window":"21:50\u201305:05","dark_hours":11.24,"date":"2029-11-26","moon_free_dark_hours":3.27,"moon_illumination":71,"moon_separation":50.9,"score":null,"score_astronomy":55,"score_weather":null,"transit_alt":42.9,"transit_local":"01:35","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":4.83,"best_label":"good","best_window":"22:15\u201303:05","dark_hours":11.26,"date":"2029-11-27","moon_free_dark_hours":4.37,"moon_illumination":61,"moon_separation":61.5,"score":null,"score_astronomy":80,"score_weather":null,"transit_alt":42.9,"transit_local":"01:30","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":6.17,"best_label":"good","best_window":"22:10\u201304:20","dark_hours":11.28,"date":"2029-11-28","moon_free_dark_hours":5.5,"moon_illumination":51,"moon_separation":72.8,"score":null,"score_astronomy":86,"score_weather":null,"transit_alt":42.9,"transit_local":"01:25","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":6.33,"best_label":"good","best_window":"22:05\u201304:25","dark_hours":11.3,"date":"2029-11-29","moon_free_dark_hours":6.65,"moon_illumination":40,"moon_separation":84.7,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"01:20","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":6.42,"best_label":"good","best_window":"22:05\u201304:30","dark_hours":11.32,"date":"2029-11-30","moon_free_dark_hours":7.83,"moon_illumination":29,"moon_separation":97.1,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"01:15","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":6.5,"best_label":"good","best_window":"22:00\u201304:30","dark_hours":11.34,"date":"2029-12-01","moon_free_dark_hours":9.08,"moon_illumination":19,"moon_separation":109.6,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"01:15","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":6.58,"best_label":"good","best_window":"21:55\u201304:30","dark_hours":11.35,"date":"2029-12-02","moon_free_dark_hours":10.37,"moon_illumination":11,"moon_separation":122.1,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"01:10","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":6.58,"best_label":"good","best_window":"21:50\u201304:25","dark_hours":11.37,"date":"2029-12-03","moon_free_dark_hours":11.35,"moon_illumination":4,"moon_separation":133.9,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"01:05","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":6.5,"best_label":"good","best_window":"21:50\u201304:20","dark_hours":11.38,"date":"2029-12-04","moon_free_dark_hours":11.37,"moon_illumination":1,"moon_separation":144.0,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"01:00","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":6.5,"best_label":"good","best_window":"21:45\u201304:15","dark_hours":11.4,"date":"2029-12-05","moon_free_dark_hours":11.37,"moon_illumination":0,"moon_separation":150.3,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"01:00","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":6.58,"best_label":"good","best_window":"21:40\u201304:15","dark_hours":11.41,"date":"2029-12-06","moon_free_dark_hours":11.38,"moon_illumination":2,"moon_separation":150.4,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"00:55","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":6.58,"best_label":"good","best_window":"21:35\u201304:10","dark_hours":11.42,"date":"2029-12-07","moon_free_dark_hours":11.1,"moon_illumination":7,"moon_separation":144.6,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"00:50","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":"2029-11-08","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"}}
