{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":3.42,"best_label":"good","best_window":"19:40\u201323:05","dark_hours":9.93,"date":"2036-02-23","moon_free_dark_hours":9.9,"moon_illumination":10,"moon_separation":136.8,"score":null,"score_astronomy":76,"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":9.89,"date":"2036-02-24","moon_free_dark_hours":9.87,"moon_illumination":5,"moon_separation":126.9,"score":null,"score_astronomy":74,"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":9.84,"date":"2036-02-25","moon_free_dark_hours":9.83,"moon_illumination":2,"moon_separation":116.3,"score":null,"score_astronomy":73,"score_weather":null,"transit_alt":42.9,"transit_local":"19:35","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":3.25,"best_label":"good","best_window":"19:40\u201322:55","dark_hours":9.8,"date":"2036-02-26","moon_free_dark_hours":9.78,"moon_illumination":0,"moon_separation":105.4,"score":null,"score_astronomy":71,"score_weather":null,"transit_alt":42.9,"transit_local":"19:35","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":3.08,"best_label":"good","best_window":"19:45\u201322:50","dark_hours":9.76,"date":"2036-02-27","moon_free_dark_hours":9.75,"moon_illumination":0,"moon_separation":94.2,"score":null,"score_astronomy":69,"score_weather":null,"transit_alt":42.9,"transit_local":"19:30","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":3.0,"best_label":"good","best_window":"19:45\u201322:45","dark_hours":9.71,"date":"2036-02-28","moon_free_dark_hours":9.7,"moon_illumination":3,"moon_separation":82.8,"score":null,"score_astronomy":67,"score_weather":null,"transit_alt":42.9,"transit_local":"19:25","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":2.92,"best_label":"good","best_window":"19:45\u201322:40","dark_hours":9.67,"date":"2036-02-29","moon_free_dark_hours":8.98,"moon_illumination":7,"moon_separation":71.3,"score":null,"score_astronomy":64,"score_weather":null,"transit_alt":42.9,"transit_local":"19:20","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":2.83,"best_label":"good","best_window":"19:45\u201322:35","dark_hours":9.62,"date":"2036-03-01","moon_free_dark_hours":7.92,"moon_illumination":14,"moon_separation":59.8,"score":null,"score_astronomy":59,"score_weather":null,"transit_alt":42.9,"transit_local":"19:20","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":2.58,"best_label":"good","best_window":"19:50\u201322:25","dark_hours":9.57,"date":"2036-03-02","moon_free_dark_hours":6.83,"moon_illumination":22,"moon_separation":48.5,"score":null,"score_astronomy":51,"score_weather":null,"transit_alt":42.9,"transit_local":"19:15","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":2.33,"best_label":"good","best_window":"19:50\u201322:10","dark_hours":9.53,"date":"2036-03-03","moon_free_dark_hours":5.73,"moon_illumination":31,"moon_separation":37.9,"score":null,"score_astronomy":41,"score_weather":null,"transit_alt":42.9,"transit_local":"19:10","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":2.0,"best_label":"good","best_window":"19:50\u201321:50","dark_hours":9.48,"date":"2036-03-04","moon_free_dark_hours":4.62,"moon_illumination":42,"moon_separation":28.9,"score":null,"score_astronomy":30,"score_weather":null,"transit_alt":42.9,"transit_local":"19:05","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":2.92,"best_label":"marginal","best_window":"19:50\u201322:45","dark_hours":9.44,"date":"2036-03-05","moon_free_dark_hours":3.53,"moon_illumination":53,"moon_separation":24.1,"score":null,"score_astronomy":22,"score_weather":null,"transit_alt":42.9,"transit_local":"19:00","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":2.58,"best_label":"marginal","best_window":"19:55\u201322:30","dark_hours":9.39,"date":"2036-03-06","moon_free_dark_hours":2.47,"moon_illumination":64,"moon_separation":26.3,"score":null,"score_astronomy":15,"score_weather":null,"transit_alt":42.9,"transit_local":"19:00","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":2.17,"best_label":"marginal","best_window":"19:55\u201322:05","dark_hours":9.34,"date":"2036-03-07","moon_free_dark_hours":1.47,"moon_illumination":75,"moon_separation":34.4,"score":null,"score_astronomy":11,"score_weather":null,"transit_alt":42.9,"transit_local":"18:55","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":2.08,"best_label":"marginal","best_window":"19:55\u201322:00","dark_hours":9.29,"date":"2036-03-08","moon_free_dark_hours":0.58,"moon_illumination":84,"moon_separation":45.7,"score":null,"score_astronomy":11,"score_weather":null,"transit_alt":42.9,"transit_local":"18:50","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":2.08,"best_label":"marginal","best_window":"19:55\u201322:00","dark_hours":9.24,"date":"2036-03-09","moon_free_dark_hours":0.0,"moon_illumination":92,"moon_separation":58.2,"score":null,"score_astronomy":13,"score_weather":null,"transit_alt":42.9,"transit_local":"18:45","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":2.25,"best_label":"marginal","best_window":"19:55\u201322:10","dark_hours":9.2,"date":"2036-03-10","moon_free_dark_hours":0.0,"moon_illumination":97,"moon_separation":71.4,"score":null,"score_astronomy":17,"score_weather":null,"transit_alt":42.9,"transit_local":"18:40","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":0.17,"best_label":"good","best_window":"20:00\u201320:10","dark_hours":9.15,"date":"2036-03-11","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":84.7,"score":null,"score_astronomy":22,"score_weather":null,"transit_alt":42.9,"transit_local":"18:40","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":1.42,"best_label":"good","best_window":"20:00\u201321:25","dark_hours":9.1,"date":"2036-03-12","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":97.9,"score":null,"score_astronomy":28,"score_weather":null,"transit_alt":42.9,"transit_local":"18:35","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":1.58,"best_label":"good","best_window":"20:00\u201321:35","dark_hours":9.05,"date":"2036-03-13","moon_free_dark_hours":0.0,"moon_illumination":97,"moon_separation":110.7,"score":null,"score_astronomy":34,"score_weather":null,"transit_alt":42.9,"transit_local":"18:30","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":1.58,"best_label":"good","best_window":"20:00\u201321:35","dark_hours":9.0,"date":"2036-03-14","moon_free_dark_hours":1.0,"moon_illumination":92,"moon_separation":123.0,"score":null,"score_astronomy":40,"score_weather":null,"transit_alt":42.9,"transit_local":"18:25","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":1.58,"best_label":"good","best_window":"20:05\u201321:40","dark_hours":8.95,"date":"2036-03-15","moon_free_dark_hours":2.07,"moon_illumination":85,"moon_separation":134.3,"score":null,"score_astronomy":39,"score_weather":null,"transit_alt":42.9,"transit_local":"18:25","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":1.58,"best_label":"good","best_window":"20:05\u201321:40","dark_hours":8.9,"date":"2036-03-16","moon_free_dark_hours":3.08,"moon_illumination":77,"moon_separation":144.4,"score":null,"score_astronomy":38,"score_weather":null,"transit_alt":42.9,"transit_local":"18:20","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":1.5,"best_label":"good","best_window":"20:05\u201321:35","dark_hours":8.85,"date":"2036-03-17","moon_free_dark_hours":4.07,"moon_illumination":68,"moon_separation":152.1,"score":null,"score_astronomy":36,"score_weather":null,"transit_alt":42.9,"transit_local":"18:15","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":1.42,"best_label":"good","best_window":"20:05\u201321:30","dark_hours":8.8,"date":"2036-03-18","moon_free_dark_hours":5.0,"moon_illumination":58,"moon_separation":155.9,"score":null,"score_astronomy":34,"score_weather":null,"transit_alt":42.9,"transit_local":"18:10","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":1.25,"best_label":"good","best_window":"20:10\u201321:25","dark_hours":8.74,"date":"2036-03-19","moon_free_dark_hours":5.85,"moon_illumination":48,"moon_separation":154.2,"score":null,"score_astronomy":32,"score_weather":null,"transit_alt":42.9,"transit_local":"18:05","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":1.17,"best_label":"good","best_window":"20:10\u201321:20","dark_hours":8.69,"date":"2036-03-20","moon_free_dark_hours":6.62,"moon_illumination":39,"moon_separation":148.1,"score":null,"score_astronomy":31,"score_weather":null,"transit_alt":42.9,"transit_local":"18:05","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":1.17,"best_label":"good","best_window":"20:10\u201321:20","dark_hours":8.64,"date":"2036-03-21","moon_free_dark_hours":7.32,"moon_illumination":30,"moon_separation":139.7,"score":null,"score_astronomy":29,"score_weather":null,"transit_alt":42.9,"transit_local":"18:00","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":1.08,"best_label":"good","best_window":"20:10\u201321:15","dark_hours":8.59,"date":"2036-03-22","moon_free_dark_hours":7.97,"moon_illumination":22,"moon_separation":130.0,"score":null,"score_astronomy":28,"score_weather":null,"transit_alt":42.9,"transit_local":"17:55","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":0.92,"best_label":"good","best_window":"20:15\u201321:10","dark_hours":8.54,"date":"2036-03-23","moon_free_dark_hours":8.53,"moon_illumination":14,"moon_separation":119.7,"score":null,"score_astronomy":26,"score_weather":null,"transit_alt":42.9,"transit_local":"17:50","verdict":"unknown","weather_source":"none","weekday":"Sun"}],"note":"score_astronomy for every night; score_weather/score only where a forecast (next 4 days) or ERA5 history exists \u2014 null otherwise","start":"2036-02-23","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"}}