{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":4.67,"best_label":"good","best_window":"19:20\u201300:00","dark_hours":10.51,"date":"2046-02-08","moon_free_dark_hours":9.57,"moon_illumination":8,"moon_separation":92.0,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"20:40","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":4.58,"best_label":"good","best_window":"19:25\u201300:00","dark_hours":10.47,"date":"2046-02-09","moon_free_dark_hours":8.55,"moon_illumination":14,"moon_separation":82.1,"score":null,"score_astronomy":88,"score_weather":null,"transit_alt":42.9,"transit_local":"20:40","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":4.5,"best_label":"good","best_window":"19:25\u201323:55","dark_hours":10.43,"date":"2046-02-10","moon_free_dark_hours":7.52,"moon_illumination":21,"moon_separation":72.2,"score":null,"score_astronomy":85,"score_weather":null,"transit_alt":42.9,"transit_local":"20:35","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":4.42,"best_label":"good","best_window":"19:25\u201323:50","dark_hours":10.4,"date":"2046-02-11","moon_free_dark_hours":6.45,"moon_illumination":29,"moon_separation":62.5,"score":null,"score_astronomy":75,"score_weather":null,"transit_alt":42.9,"transit_local":"20:30","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":4.08,"best_label":"good","best_window":"19:25\u201323:30","dark_hours":10.36,"date":"2046-02-12","moon_free_dark_hours":5.37,"moon_illumination":38,"moon_separation":53.1,"score":null,"score_astronomy":61,"score_weather":null,"transit_alt":42.9,"transit_local":"20:25","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":3.67,"best_label":"good","best_window":"19:30\u201323:10","dark_hours":10.32,"date":"2046-02-13","moon_free_dark_hours":4.25,"moon_illumination":48,"moon_separation":44.5,"score":null,"score_astronomy":47,"score_weather":null,"transit_alt":42.9,"transit_local":"20:25","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":4.58,"best_label":"marginal","best_window":"19:30\u201300:05","dark_hours":10.28,"date":"2046-02-14","moon_free_dark_hours":3.13,"moon_illumination":58,"moon_separation":37.4,"score":null,"score_astronomy":33,"score_weather":null,"transit_alt":42.9,"transit_local":"20:20","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":4.25,"best_label":"marginal","best_window":"19:30\u201323:45","dark_hours":10.24,"date":"2046-02-15","moon_free_dark_hours":2.07,"moon_illumination":68,"moon_separation":33.2,"score":null,"score_astronomy":22,"score_weather":null,"transit_alt":42.9,"transit_local":"20:15","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":3.83,"best_label":"marginal","best_window":"19:30\u201323:20","dark_hours":10.2,"date":"2046-02-16","moon_free_dark_hours":1.08,"moon_illumination":78,"moon_separation":33.5,"score":null,"score_astronomy":15,"score_weather":null,"transit_alt":42.9,"transit_local":"20:10","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":3.42,"best_label":"marginal","best_window":"19:30\u201322:55","dark_hours":10.16,"date":"2046-02-17","moon_free_dark_hours":0.27,"moon_illumination":87,"moon_separation":38.7,"score":null,"score_astronomy":13,"score_weather":null,"transit_alt":42.9,"transit_local":"20:05","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":3.33,"best_label":"marginal","best_window":"19:35\u201322:55","dark_hours":10.12,"date":"2046-02-18","moon_free_dark_hours":0.0,"moon_illumination":94,"moon_separation":47.5,"score":null,"score_astronomy":15,"score_weather":null,"transit_alt":42.9,"transit_local":"20:05","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":3.5,"best_label":"marginal","best_window":"19:35\u201323:05","dark_hours":10.08,"date":"2046-02-19","moon_free_dark_hours":0.0,"moon_illumination":98,"moon_separation":58.5,"score":null,"score_astronomy":21,"score_weather":null,"transit_alt":42.9,"transit_local":"20:00","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":3.75,"best_label":"marginal","best_window":"19:35\u201323:20","dark_hours":10.03,"date":"2046-02-20","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":70.7,"score":null,"score_astronomy":31,"score_weather":null,"transit_alt":42.9,"transit_local":"19:55","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":1.92,"best_label":"good","best_window":"19:35\u201321:30","dark_hours":9.99,"date":"2046-02-21","moon_free_dark_hours":0.0,"moon_illumination":98,"moon_separation":83.4,"score":null,"score_astronomy":43,"score_weather":null,"transit_alt":42.9,"transit_local":"19:50","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":3.0,"best_label":"good","best_window":"19:40\u201322:40","dark_hours":9.95,"date":"2046-02-22","moon_free_dark_hours":0.72,"moon_illumination":94,"moon_separation":96.1,"score":null,"score_astronomy":66,"score_weather":null,"transit_alt":42.9,"transit_local":"19:45","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":3.17,"best_label":"good","best_window":"19:40\u201322:50","dark_hours":9.91,"date":"2046-02-23","moon_free_dark_hours":2.0,"moon_illumination":87,"moon_separation":108.5,"score":null,"score_astronomy":72,"score_weather":null,"transit_alt":42.9,"transit_local":"19:45","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":3.25,"best_label":"good","best_window":"19:40\u201322:55","dark_hours":9.86,"date":"2046-02-24","moon_free_dark_hours":3.28,"moon_illumination":78,"moon_separation":120.2,"score":null,"score_astronomy":73,"score_weather":null,"transit_alt":42.9,"transit_local":"19:40","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":3.25,"best_label":"good","best_window":"19:40\u201322:55","dark_hours":9.82,"date":"2046-02-25","moon_free_dark_hours":4.52,"moon_illumination":68,"moon_separation":130.7,"score":null,"score_astronomy":72,"score_weather":null,"transit_alt":42.9,"transit_local":"19:35","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":3.08,"best_label":"good","best_window":"19:45\u201322:50","dark_hours":9.77,"date":"2046-02-26","moon_free_dark_hours":5.72,"moon_illumination":58,"moon_separation":139.3,"score":null,"score_astronomy":69,"score_weather":null,"transit_alt":42.9,"transit_local":"19:30","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":3.0,"best_label":"good","best_window":"19:45\u201322:45","dark_hours":9.73,"date":"2046-02-27","moon_free_dark_hours":6.8,"moon_illumination":47,"moon_separation":145.3,"score":null,"score_astronomy":69,"score_weather":null,"transit_alt":42.9,"transit_local":"19:30","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":3.0,"best_label":"good","best_window":"19:45\u201322:45","dark_hours":9.69,"date":"2046-02-28","moon_free_dark_hours":7.73,"moon_illumination":37,"moon_separation":147.3,"score":null,"score_astronomy":67,"score_weather":null,"transit_alt":42.9,"transit_local":"19:25","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":2.92,"best_label":"good","best_window":"19:45\u201322:40","dark_hours":9.64,"date":"2046-03-01","moon_free_dark_hours":8.5,"moon_illumination":28,"moon_separation":145.2,"score":null,"score_astronomy":65,"score_weather":null,"transit_alt":42.9,"transit_local":"19:20","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":2.83,"best_label":"good","best_window":"19:45\u201322:35","dark_hours":9.59,"date":"2046-03-02","moon_free_dark_hours":9.12,"moon_illumination":20,"moon_separation":139.7,"score":null,"score_astronomy":63,"score_weather":null,"transit_alt":42.9,"transit_local":"19:15","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":2.67,"best_label":"good","best_window":"19:50\u201322:30","dark_hours":9.55,"date":"2046-03-03","moon_free_dark_hours":9.52,"moon_illumination":12,"moon_separation":132.2,"score":null,"score_astronomy":61,"score_weather":null,"transit_alt":42.9,"transit_local":"19:10","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":2.58,"best_label":"good","best_window":"19:50\u201322:25","dark_hours":9.5,"date":"2046-03-04","moon_free_dark_hours":9.48,"moon_illumination":7,"moon_separation":123.5,"score":null,"score_astronomy":60,"score_weather":null,"transit_alt":42.9,"transit_local":"19:10","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":2.58,"best_label":"good","best_window":"19:50\u201322:25","dark_hours":9.45,"date":"2046-03-05","moon_free_dark_hours":9.43,"moon_illumination":3,"moon_separation":114.2,"score":null,"score_astronomy":58,"score_weather":null,"transit_alt":42.9,"transit_local":"19:05","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":2.5,"best_label":"good","best_window":"19:50\u201322:20","dark_hours":9.41,"date":"2046-03-06","moon_free_dark_hours":9.4,"moon_illumination":1,"moon_separation":104.5,"score":null,"score_astronomy":56,"score_weather":null,"transit_alt":42.9,"transit_local":"19:00","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":2.33,"best_label":"good","best_window":"19:55\u201322:15","dark_hours":9.36,"date":"2046-03-07","moon_free_dark_hours":9.35,"moon_illumination":0,"moon_separation":94.6,"score":null,"score_astronomy":54,"score_weather":null,"transit_alt":42.9,"transit_local":"18:55","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":2.25,"best_label":"good","best_window":"19:55\u201322:10","dark_hours":9.31,"date":"2046-03-08","moon_free_dark_hours":9.3,"moon_illumination":1,"moon_separation":84.6,"score":null,"score_astronomy":53,"score_weather":null,"transit_alt":42.9,"transit_local":"18:50","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":2.25,"best_label":"good","best_window":"19:55\u201322:10","dark_hours":9.26,"date":"2046-03-09","moon_free_dark_hours":9.0,"moon_illumination":4,"moon_separation":74.7,"score":null,"score_astronomy":50,"score_weather":null,"transit_alt":42.9,"transit_local":"18:50","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":"2046-02-08","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"}}