{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":6.58,"best_label":"good","best_window":"21:15\u201303:50","dark_hours":11.47,"date":"2034-12-12","moon_free_dark_hours":11.47,"moon_illumination":4,"moon_separation":148.8,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"00:30","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":6.5,"best_label":"good","best_window":"21:15\u201303:45","dark_hours":11.48,"date":"2034-12-13","moon_free_dark_hours":10.67,"moon_illumination":9,"moon_separation":140.2,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"00:25","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":6.58,"best_label":"good","best_window":"21:10\u201303:45","dark_hours":11.49,"date":"2034-12-14","moon_free_dark_hours":9.75,"moon_illumination":15,"moon_separation":130.1,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"00:25","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":6.58,"best_label":"good","best_window":"21:05\u201303:40","dark_hours":11.49,"date":"2034-12-15","moon_free_dark_hours":8.8,"moon_illumination":22,"moon_separation":119.3,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"00:20","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":6.5,"best_label":"good","best_window":"21:05\u201303:35","dark_hours":11.5,"date":"2034-12-16","moon_free_dark_hours":7.78,"moon_illumination":31,"moon_separation":107.9,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"00:15","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":6.33,"best_label":"good","best_window":"21:10\u201303:30","dark_hours":11.5,"date":"2034-12-17","moon_free_dark_hours":6.77,"moon_illumination":41,"moon_separation":96.1,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"00:10","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":6.17,"best_label":"good","best_window":"21:15\u201303:25","dark_hours":11.5,"date":"2034-12-18","moon_free_dark_hours":5.68,"moon_illumination":52,"moon_separation":83.9,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"00:10","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":5.83,"best_label":"good","best_window":"21:35\u201303:25","dark_hours":11.51,"date":"2034-12-19","moon_free_dark_hours":4.6,"moon_illumination":63,"moon_separation":71.4,"score":null,"score_astronomy":86,"score_weather":null,"transit_alt":42.9,"transit_local":"00:05","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":3.33,"best_label":"good","best_window":"00:00\u201303:20","dark_hours":11.51,"date":"2034-12-20","moon_free_dark_hours":3.47,"moon_illumination":74,"moon_separation":58.8,"score":null,"score_astronomy":80,"score_weather":null,"transit_alt":42.9,"transit_local":"00:00","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":7.0,"best_label":"marginal","best_window":"20:45\u201303:45","dark_hours":11.51,"date":"2034-12-21","moon_free_dark_hours":2.28,"moon_illumination":83,"moon_separation":46.3,"score":null,"score_astronomy":43,"score_weather":null,"transit_alt":42.9,"transit_local":"23:55","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":4.67,"best_label":"marginal","best_window":"22:40\u201303:20","dark_hours":11.51,"date":"2034-12-22","moon_free_dark_hours":1.12,"moon_illumination":91,"moon_separation":34.7,"score":null,"score_astronomy":24,"score_weather":null,"transit_alt":42.9,"transit_local":"23:50","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":11.51,"date":"2034-12-23","moon_free_dark_hours":0.0,"moon_illumination":97,"moon_separation":26.0,"score":null,"score_astronomy":14,"score_weather":null,"transit_alt":42.9,"transit_local":"23:50","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":11.5,"date":"2034-12-24","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":24.0,"score":null,"score_astronomy":10,"score_weather":null,"transit_alt":42.9,"transit_local":"23:45","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":11.5,"date":"2034-12-25","moon_free_dark_hours":0.0,"moon_illumination":99,"moon_separation":30.1,"score":null,"score_astronomy":13,"score_weather":null,"transit_alt":42.9,"transit_local":"23:40","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":4.67,"best_label":"marginal","best_window":"20:10\u201300:50","dark_hours":11.5,"date":"2034-12-26","moon_free_dark_hours":0.03,"moon_illumination":96,"moon_separation":40.7,"score":null,"score_astronomy":25,"score_weather":null,"transit_alt":42.9,"transit_local":"23:35","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":6.92,"best_label":"marginal","best_window":"19:45\u201302:40","dark_hours":11.49,"date":"2034-12-27","moon_free_dark_hours":1.17,"moon_illumination":91,"moon_separation":52.7,"score":null,"score_astronomy":43,"score_weather":null,"transit_alt":42.9,"transit_local":"23:30","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":3.0,"best_label":"good","best_window":"20:15\u201323:15","dark_hours":11.48,"date":"2034-12-28","moon_free_dark_hours":2.27,"moon_illumination":83,"moon_separation":65.2,"score":null,"score_astronomy":81,"score_weather":null,"transit_alt":42.9,"transit_local":"23:30","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":5.42,"best_label":"good","best_window":"20:10\u201301:35","dark_hours":11.48,"date":"2034-12-29","moon_free_dark_hours":3.37,"moon_illumination":74,"moon_separation":77.5,"score":null,"score_astronomy":86,"score_weather":null,"transit_alt":42.9,"transit_local":"23:25","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":6.17,"best_label":"good","best_window":"20:05\u201302:15","dark_hours":11.47,"date":"2034-12-30","moon_free_dark_hours":4.42,"moon_illumination":65,"moon_separation":89.5,"score":null,"score_astronomy":88,"score_weather":null,"transit_alt":42.9,"transit_local":"23:20","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":6.42,"best_label":"good","best_window":"20:00\u201302:25","dark_hours":11.46,"date":"2034-12-31","moon_free_dark_hours":5.42,"moon_illumination":55,"moon_separation":101.1,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"23:15","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":6.42,"best_label":"good","best_window":"20:00\u201302:25","dark_hours":11.45,"date":"2035-01-01","moon_free_dark_hours":6.38,"moon_illumination":45,"moon_separation":112.3,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"23:15","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":6.5,"best_label":"good","best_window":"19:55\u201302:25","dark_hours":11.44,"date":"2035-01-02","moon_free_dark_hours":7.35,"moon_illumination":36,"moon_separation":123.1,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"23:10","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":6.58,"best_label":"good","best_window":"19:50\u201302:25","dark_hours":11.43,"date":"2035-01-03","moon_free_dark_hours":8.28,"moon_illumination":27,"moon_separation":133.3,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"23:05","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":6.58,"best_label":"good","best_window":"19:45\u201302:20","dark_hours":11.42,"date":"2035-01-04","moon_free_dark_hours":9.2,"moon_illumination":19,"moon_separation":142.8,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"23:00","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":6.5,"best_label":"good","best_window":"19:45\u201302:15","dark_hours":11.4,"date":"2035-01-05","moon_free_dark_hours":10.08,"moon_illumination":12,"moon_separation":150.7,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"22:55","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":6.5,"best_label":"good","best_window":"19:40\u201302:10","dark_hours":11.39,"date":"2035-01-06","moon_free_dark_hours":10.95,"moon_illumination":7,"moon_separation":155.7,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"22:55","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":6.58,"best_label":"good","best_window":"19:35\u201302:10","dark_hours":11.38,"date":"2035-01-07","moon_free_dark_hours":11.35,"moon_illumination":3,"moon_separation":155.7,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"22:50","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":6.58,"best_label":"good","best_window":"19:30\u201302:05","dark_hours":11.36,"date":"2035-01-08","moon_free_dark_hours":11.35,"moon_illumination":1,"moon_separation":150.6,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"22:45","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":6.58,"best_label":"good","best_window":"19:25\u201302:00","dark_hours":11.34,"date":"2035-01-09","moon_free_dark_hours":11.33,"moon_illumination":0,"moon_separation":142.4,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"22:40","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":6.5,"best_label":"good","best_window":"19:25\u201301:55","dark_hours":11.33,"date":"2035-01-10","moon_free_dark_hours":11.32,"moon_illumination":2,"moon_separation":132.5,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"22:35","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":"2034-12-12","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"}}