{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":5.67,"best_label":"good","best_window":"19:10\u201300:50","dark_hours":10.92,"date":"2047-01-27","moon_free_dark_hours":10.9,"moon_illumination":4,"moon_separation":111.8,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"21:30","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":5.58,"best_label":"good","best_window":"19:10\u201300:45","dark_hours":10.89,"date":"2047-01-28","moon_free_dark_hours":9.87,"moon_illumination":8,"moon_separation":101.4,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"21:25","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":5.5,"best_label":"good","best_window":"19:10\u201300:40","dark_hours":10.86,"date":"2047-01-29","moon_free_dark_hours":8.83,"moon_illumination":14,"moon_separation":91.1,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"21:25","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":5.5,"best_label":"good","best_window":"19:10\u201300:40","dark_hours":10.82,"date":"2047-01-30","moon_free_dark_hours":7.8,"moon_illumination":22,"moon_separation":80.9,"score":null,"score_astronomy":88,"score_weather":null,"transit_alt":42.9,"transit_local":"21:20","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":5.33,"best_label":"good","best_window":"19:15\u201300:35","dark_hours":10.79,"date":"2047-01-31","moon_free_dark_hours":6.8,"moon_illumination":30,"moon_separation":70.9,"score":null,"score_astronomy":84,"score_weather":null,"transit_alt":42.9,"transit_local":"21:15","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":5.25,"best_label":"good","best_window":"19:15\u201300:30","dark_hours":10.76,"date":"2047-02-01","moon_free_dark_hours":5.77,"moon_illumination":39,"moon_separation":61.2,"score":null,"score_astronomy":74,"score_weather":null,"transit_alt":42.9,"transit_local":"21:10","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":4.75,"best_label":"good","best_window":"19:20\u201300:05","dark_hours":10.73,"date":"2047-02-02","moon_free_dark_hours":4.73,"moon_illumination":48,"moon_separation":51.9,"score":null,"score_astronomy":62,"score_weather":null,"transit_alt":42.9,"transit_local":"21:05","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":5.67,"best_label":"marginal","best_window":"19:15\u201300:55","dark_hours":10.69,"date":"2047-02-03","moon_free_dark_hours":3.68,"moon_illumination":58,"moon_separation":43.5,"score":null,"score_astronomy":46,"score_weather":null,"transit_alt":42.9,"transit_local":"21:05","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":5.42,"best_label":"marginal","best_window":"19:15\u201300:40","dark_hours":10.66,"date":"2047-02-04","moon_free_dark_hours":2.67,"moon_illumination":67,"moon_separation":36.4,"score":null,"score_astronomy":31,"score_weather":null,"transit_alt":42.9,"transit_local":"21:00","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":4.92,"best_label":"marginal","best_window":"19:20\u201300:15","dark_hours":10.62,"date":"2047-02-05","moon_free_dark_hours":1.7,"moon_illumination":76,"moon_separation":32.1,"score":null,"score_astronomy":20,"score_weather":null,"transit_alt":42.9,"transit_local":"20:55","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":4.42,"best_label":"marginal","best_window":"19:20\u201323:45","dark_hours":10.59,"date":"2047-02-06","moon_free_dark_hours":0.83,"moon_illumination":84,"moon_separation":31.8,"score":null,"score_astronomy":14,"score_weather":null,"transit_alt":42.9,"transit_local":"20:50","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":1.58,"best_label":"marginal","best_window":"19:20\u201320:55","dark_hours":10.55,"date":"2047-02-07","moon_free_dark_hours":0.07,"moon_illumination":91,"moon_separation":36.1,"score":null,"score_astronomy":13,"score_weather":null,"transit_alt":42.9,"transit_local":"20:45","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":3.08,"best_label":"marginal","best_window":"19:20\u201322:25","dark_hours":10.52,"date":"2047-02-08","moon_free_dark_hours":0.0,"moon_illumination":96,"moon_separation":44.0,"score":null,"score_astronomy":17,"score_weather":null,"transit_alt":42.9,"transit_local":"20:45","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":4.17,"best_label":"marginal","best_window":"19:25\u201323:35","dark_hours":10.48,"date":"2047-02-09","moon_free_dark_hours":0.0,"moon_illumination":99,"moon_separation":54.1,"score":null,"score_astronomy":24,"score_weather":null,"transit_alt":42.9,"transit_local":"20:40","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":4.5,"best_label":"marginal","best_window":"19:25\u201323:55","dark_hours":10.44,"date":"2047-02-10","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":65.6,"score":null,"score_astronomy":35,"score_weather":null,"transit_alt":42.9,"transit_local":"20:35","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":2.08,"best_label":"good","best_window":"19:25\u201321:30","dark_hours":10.41,"date":"2047-02-11","moon_free_dark_hours":0.0,"moon_illumination":98,"moon_separation":77.8,"score":null,"score_astronomy":50,"score_weather":null,"transit_alt":42.9,"transit_local":"20:30","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":3.83,"best_label":"good","best_window":"19:25\u201323:15","dark_hours":10.37,"date":"2047-02-12","moon_free_dark_hours":1.08,"moon_illumination":92,"moon_separation":90.3,"score":null,"score_astronomy":79,"score_weather":null,"transit_alt":42.9,"transit_local":"20:30","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":3.92,"best_label":"good","best_window":"19:30\u201323:25","dark_hours":10.33,"date":"2047-02-13","moon_free_dark_hours":2.32,"moon_illumination":85,"moon_separation":102.8,"score":null,"score_astronomy":86,"score_weather":null,"transit_alt":42.9,"transit_local":"20:25","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":4.0,"best_label":"good","best_window":"19:30\u201323:30","dark_hours":10.29,"date":"2047-02-14","moon_free_dark_hours":3.57,"moon_illumination":76,"moon_separation":114.9,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"20:20","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":4.08,"best_label":"good","best_window":"19:30\u201323:35","dark_hours":10.25,"date":"2047-02-15","moon_free_dark_hours":4.83,"moon_illumination":65,"moon_separation":126.4,"score":null,"score_astronomy":88,"score_weather":null,"transit_alt":42.9,"transit_local":"20:15","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":4.0,"best_label":"good","best_window":"19:30\u201323:30","dark_hours":10.21,"date":"2047-02-16","moon_free_dark_hours":6.07,"moon_illumination":54,"moon_separation":136.5,"score":null,"score_astronomy":87,"score_weather":null,"transit_alt":42.9,"transit_local":"20:10","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":3.92,"best_label":"good","best_window":"19:30\u201323:25","dark_hours":10.17,"date":"2047-02-17","moon_free_dark_hours":7.2,"moon_illumination":43,"moon_separation":144.3,"score":null,"score_astronomy":86,"score_weather":null,"transit_alt":42.9,"transit_local":"20:10","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":3.83,"best_label":"good","best_window":"19:35\u201323:25","dark_hours":10.13,"date":"2047-02-18","moon_free_dark_hours":8.22,"moon_illumination":32,"moon_separation":148.4,"score":null,"score_astronomy":84,"score_weather":null,"transit_alt":42.9,"transit_local":"20:05","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":3.75,"best_label":"good","best_window":"19:35\u201323:20","dark_hours":10.09,"date":"2047-02-19","moon_free_dark_hours":9.05,"moon_illumination":22,"moon_separation":147.6,"score":null,"score_astronomy":82,"score_weather":null,"transit_alt":42.9,"transit_local":"20:00","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":3.67,"best_label":"good","best_window":"19:35\u201323:15","dark_hours":10.04,"date":"2047-02-20","moon_free_dark_hours":9.72,"moon_illumination":14,"moon_separation":142.3,"score":null,"score_astronomy":80,"score_weather":null,"transit_alt":42.9,"transit_local":"19:55","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":3.58,"best_label":"good","best_window":"19:35\u201323:10","dark_hours":10.0,"date":"2047-02-21","moon_free_dark_hours":9.98,"moon_illumination":8,"moon_separation":134.4,"score":null,"score_astronomy":79,"score_weather":null,"transit_alt":42.9,"transit_local":"19:50","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":3.5,"best_label":"good","best_window":"19:40\u201323:10","dark_hours":9.96,"date":"2047-02-22","moon_free_dark_hours":9.93,"moon_illumination":3,"moon_separation":125.0,"score":null,"score_astronomy":77,"score_weather":null,"transit_alt":42.9,"transit_local":"19:50","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":3.42,"best_label":"good","best_window":"19:40\u201323:05","dark_hours":9.92,"date":"2047-02-23","moon_free_dark_hours":9.9,"moon_illumination":1,"moon_separation":115.0,"score":null,"score_astronomy":75,"score_weather":null,"transit_alt":42.9,"transit_local":"19:45","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":3.33,"best_label":"good","best_window":"19:40\u201323:00","dark_hours":9.87,"date":"2047-02-24","moon_free_dark_hours":9.87,"moon_illumination":0,"moon_separation":104.7,"score":null,"score_astronomy":73,"score_weather":null,"transit_alt":42.9,"transit_local":"19:40","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":3.25,"best_label":"good","best_window":"19:40\u201322:55","dark_hours":9.83,"date":"2047-02-25","moon_free_dark_hours":9.82,"moon_illumination":1,"moon_separation":94.3,"score":null,"score_astronomy":72,"score_weather":null,"transit_alt":42.9,"transit_local":"19:35","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":"2047-01-27","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"}}