{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":3.42,"best_label":"marginal","best_window":"19:35\u201323:00","dark_hours":10.05,"date":"2035-02-20","moon_free_dark_hours":0.0,"moon_illumination":97,"moon_separation":54.7,"score":null,"score_astronomy":19,"score_weather":null,"transit_alt":42.9,"transit_local":"19:55","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":3.67,"best_label":"marginal","best_window":"19:35\u201323:15","dark_hours":10.01,"date":"2035-02-21","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":67.1,"score":null,"score_astronomy":27,"score_weather":null,"transit_alt":42.9,"transit_local":"19:50","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":1.08,"best_label":"good","best_window":"19:40\u201320:45","dark_hours":9.96,"date":"2035-02-22","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":79.6,"score":null,"score_astronomy":37,"score_weather":null,"transit_alt":42.9,"transit_local":"19:50","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":2.67,"best_label":"good","best_window":"19:40\u201322:20","dark_hours":9.92,"date":"2035-02-23","moon_free_dark_hours":0.0,"moon_illumination":97,"moon_separation":92.0,"score":null,"score_astronomy":49,"score_weather":null,"transit_alt":42.9,"transit_local":"19:45","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":3.0,"best_label":"good","best_window":"19:40\u201322:40","dark_hours":9.88,"date":"2035-02-24","moon_free_dark_hours":0.93,"moon_illumination":92,"moon_separation":104.0,"score":null,"score_astronomy":66,"score_weather":null,"transit_alt":42.9,"transit_local":"19:40","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":3.08,"best_label":"good","best_window":"19:40\u201322:45","dark_hours":9.83,"date":"2035-02-25","moon_free_dark_hours":1.95,"moon_illumination":86,"moon_separation":115.6,"score":null,"score_astronomy":69,"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":"19:40\u201322:45","dark_hours":9.79,"date":"2035-02-26","moon_free_dark_hours":2.93,"moon_illumination":79,"moon_separation":126.6,"score":null,"score_astronomy":70,"score_weather":null,"transit_alt":42.9,"transit_local":"19:30","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":3.08,"best_label":"good","best_window":"19:45\u201322:50","dark_hours":9.75,"date":"2035-02-27","moon_free_dark_hours":3.87,"moon_illumination":70,"moon_separation":136.9,"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":9.7,"date":"2035-02-28","moon_free_dark_hours":4.8,"moon_illumination":61,"moon_separation":146.0,"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":9.66,"date":"2035-03-01","moon_free_dark_hours":5.68,"moon_illumination":52,"moon_separation":153.2,"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":9.61,"date":"2035-03-02","moon_free_dark_hours":6.55,"moon_illumination":42,"moon_separation":156.5,"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":9.56,"date":"2035-03-03","moon_free_dark_hours":7.35,"moon_illumination":33,"moon_separation":154.5,"score":null,"score_astronomy":62,"score_weather":null,"transit_alt":42.9,"transit_local":"19:15","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":2.67,"best_label":"good","best_window":"19:50\u201322:30","dark_hours":9.52,"date":"2035-03-04","moon_free_dark_hours":8.1,"moon_illumination":24,"moon_separation":148.1,"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":9.47,"date":"2035-03-05","moon_free_dark_hours":8.78,"moon_illumination":17,"moon_separation":139.1,"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":9.42,"date":"2035-03-06","moon_free_dark_hours":9.4,"moon_illumination":10,"moon_separation":128.8,"score":null,"score_astronomy":57,"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":9.38,"date":"2035-03-07","moon_free_dark_hours":9.35,"moon_illumination":5,"moon_separation":117.5,"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":9.33,"date":"2035-03-08","moon_free_dark_hours":9.32,"moon_illumination":1,"moon_separation":105.7,"score":null,"score_astronomy":53,"score_weather":null,"transit_alt":42.9,"transit_local":"18:55","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":2.25,"best_label":"good","best_window":"19:55\u201322:10","dark_hours":9.28,"date":"2035-03-09","moon_free_dark_hours":9.27,"moon_illumination":0,"moon_separation":93.4,"score":null,"score_astronomy":51,"score_weather":null,"transit_alt":42.9,"transit_local":"18:50","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":2.17,"best_label":"good","best_window":"19:55\u201322:05","dark_hours":9.23,"date":"2035-03-10","moon_free_dark_hours":9.22,"moon_illumination":1,"moon_separation":80.9,"score":null,"score_astronomy":50,"score_weather":null,"transit_alt":42.9,"transit_local":"18:45","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":2.0,"best_label":"good","best_window":"20:00\u201322:00","dark_hours":9.18,"date":"2035-03-11","moon_free_dark_hours":9.02,"moon_illumination":5,"moon_separation":68.2,"score":null,"score_astronomy":47,"score_weather":null,"transit_alt":42.9,"transit_local":"18:40","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":1.92,"best_label":"good","best_window":"20:00\u201321:55","dark_hours":9.13,"date":"2035-03-12","moon_free_dark_hours":7.85,"moon_illumination":11,"moon_separation":55.7,"score":null,"score_astronomy":43,"score_weather":null,"transit_alt":42.9,"transit_local":"18:35","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":1.75,"best_label":"good","best_window":"20:00\u201321:45","dark_hours":9.09,"date":"2035-03-13","moon_free_dark_hours":6.68,"moon_illumination":19,"moon_separation":43.6,"score":null,"score_astronomy":37,"score_weather":null,"transit_alt":42.9,"transit_local":"18:35","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":1.5,"best_label":"good","best_window":"20:00\u201321:30","dark_hours":9.04,"date":"2035-03-14","moon_free_dark_hours":5.5,"moon_illumination":29,"moon_separation":32.8,"score":null,"score_astronomy":29,"score_weather":null,"transit_alt":42.9,"transit_local":"18:30","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":1.0,"best_label":"good","best_window":"20:05\u201321:05","dark_hours":8.99,"date":"2035-03-15","moon_free_dark_hours":4.38,"moon_illumination":40,"moon_separation":25.2,"score":null,"score_astronomy":22,"score_weather":null,"transit_alt":42.9,"transit_local":"18:25","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":2.0,"best_label":"marginal","best_window":"20:05\u201322:05","dark_hours":8.94,"date":"2035-03-16","moon_free_dark_hours":3.32,"moon_illumination":51,"moon_separation":23.9,"score":null,"score_astronomy":15,"score_weather":null,"transit_alt":42.9,"transit_local":"18:20","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":1.67,"best_label":"marginal","best_window":"20:05\u201321:45","dark_hours":8.88,"date":"2035-03-17","moon_free_dark_hours":2.33,"moon_illumination":62,"moon_separation":29.7,"score":null,"score_astronomy":11,"score_weather":null,"transit_alt":42.9,"transit_local":"18:20","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":1.5,"best_label":"marginal","best_window":"20:05\u201321:35","dark_hours":8.83,"date":"2035-03-18","moon_free_dark_hours":1.45,"moon_illumination":73,"moon_separation":39.5,"score":null,"score_astronomy":9,"score_weather":null,"transit_alt":42.9,"transit_local":"18:15","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":1.42,"best_label":"marginal","best_window":"20:05\u201321:30","dark_hours":8.78,"date":"2035-03-19","moon_free_dark_hours":0.65,"moon_illumination":82,"moon_separation":51.0,"score":null,"score_astronomy":9,"score_weather":null,"transit_alt":42.9,"transit_local":"18:10","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":1.33,"best_label":"marginal","best_window":"20:10\u201321:30","dark_hours":8.73,"date":"2035-03-20","moon_free_dark_hours":0.0,"moon_illumination":90,"moon_separation":63.1,"score":null,"score_astronomy":9,"score_weather":null,"transit_alt":42.9,"transit_local":"18:05","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":1.42,"best_label":"marginal","best_window":"20:10\u201321:35","dark_hours":8.68,"date":"2035-03-21","moon_free_dark_hours":0.0,"moon_illumination":96,"moon_separation":75.3,"score":null,"score_astronomy":11,"score_weather":null,"transit_alt":42.9,"transit_local":"18:00","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":"2035-02-20","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"}}
