{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":3.58,"best_label":"good","best_window":"19:35\u201323:10","dark_hours":9.99,"date":"2033-02-21","moon_free_dark_hours":5.48,"moon_illumination":56,"moon_separation":144.4,"score":null,"score_astronomy":78,"score_weather":null,"transit_alt":42.9,"transit_local":"19:50","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":3.42,"best_label":"good","best_window":"19:40\u201323:05","dark_hours":9.94,"date":"2033-02-22","moon_free_dark_hours":6.42,"moon_illumination":46,"moon_separation":152.1,"score":null,"score_astronomy":76,"score_weather":null,"transit_alt":42.9,"transit_local":"19:45","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":3.33,"best_label":"good","best_window":"19:40\u201323:00","dark_hours":9.9,"date":"2033-02-23","moon_free_dark_hours":7.32,"moon_illumination":35,"moon_separation":155.8,"score":null,"score_astronomy":74,"score_weather":null,"transit_alt":42.9,"transit_local":"19:40","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":3.25,"best_label":"good","best_window":"19:40\u201322:55","dark_hours":9.86,"date":"2033-02-24","moon_free_dark_hours":8.15,"moon_illumination":25,"moon_separation":153.1,"score":null,"score_astronomy":73,"score_weather":null,"transit_alt":42.9,"transit_local":"19:40","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":3.25,"best_label":"good","best_window":"19:40\u201322:55","dark_hours":9.81,"date":"2033-02-25","moon_free_dark_hours":8.95,"moon_illumination":16,"moon_separation":145.0,"score":null,"score_astronomy":72,"score_weather":null,"transit_alt":42.9,"transit_local":"19:35","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":3.08,"best_label":"good","best_window":"19:45\u201322:50","dark_hours":9.77,"date":"2033-02-26","moon_free_dark_hours":9.7,"moon_illumination":9,"moon_separation":133.9,"score":null,"score_astronomy":69,"score_weather":null,"transit_alt":42.9,"transit_local":"19:30","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":3.0,"best_label":"good","best_window":"19:45\u201322:45","dark_hours":9.72,"date":"2033-02-27","moon_free_dark_hours":9.72,"moon_illumination":3,"moon_separation":121.2,"score":null,"score_astronomy":68,"score_weather":null,"transit_alt":42.9,"transit_local":"19:25","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":2.92,"best_label":"good","best_window":"19:45\u201322:40","dark_hours":9.68,"date":"2033-02-28","moon_free_dark_hours":9.67,"moon_illumination":0,"moon_separation":107.7,"score":null,"score_astronomy":66,"score_weather":null,"transit_alt":42.9,"transit_local":"19:25","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":2.92,"best_label":"good","best_window":"19:45\u201322:40","dark_hours":9.63,"date":"2033-03-01","moon_free_dark_hours":9.62,"moon_illumination":1,"moon_separation":93.9,"score":null,"score_astronomy":65,"score_weather":null,"transit_alt":42.9,"transit_local":"19:20","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":2.75,"best_label":"good","best_window":"19:50\u201322:35","dark_hours":9.59,"date":"2033-03-02","moon_free_dark_hours":9.55,"moon_illumination":4,"moon_separation":80.0,"score":null,"score_astronomy":62,"score_weather":null,"transit_alt":42.9,"transit_local":"19:15","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":2.67,"best_label":"good","best_window":"19:50\u201322:30","dark_hours":9.54,"date":"2033-03-03","moon_free_dark_hours":8.28,"moon_illumination":10,"moon_separation":66.4,"score":null,"score_astronomy":58,"score_weather":null,"transit_alt":42.9,"transit_local":"19:10","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":2.58,"best_label":"good","best_window":"19:50\u201322:25","dark_hours":9.49,"date":"2033-03-04","moon_free_dark_hours":7.07,"moon_illumination":18,"moon_separation":53.5,"score":null,"score_astronomy":50,"score_weather":null,"transit_alt":42.9,"transit_local":"19:05","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":2.33,"best_label":"good","best_window":"19:50\u201322:10","dark_hours":9.45,"date":"2033-03-05","moon_free_dark_hours":5.9,"moon_illumination":28,"moon_separation":41.7,"score":null,"score_astronomy":42,"score_weather":null,"transit_alt":42.9,"transit_local":"19:05","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":2.0,"best_label":"good","best_window":"19:50\u201321:50","dark_hours":9.4,"date":"2033-03-06","moon_free_dark_hours":4.78,"moon_illumination":38,"moon_separation":31.7,"score":null,"score_astronomy":32,"score_weather":null,"transit_alt":42.9,"transit_local":"19:00","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":2.75,"best_label":"marginal","best_window":"19:55\u201322:40","dark_hours":9.35,"date":"2033-03-07","moon_free_dark_hours":3.8,"moon_illumination":49,"moon_separation":25.3,"score":null,"score_astronomy":23,"score_weather":null,"transit_alt":42.9,"transit_local":"18:55","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":2.5,"best_label":"marginal","best_window":"19:55\u201322:25","dark_hours":9.31,"date":"2033-03-08","moon_free_dark_hours":2.88,"moon_illumination":59,"moon_separation":24.6,"score":null,"score_astronomy":16,"score_weather":null,"transit_alt":42.9,"transit_local":"18:50","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":2.17,"best_label":"marginal","best_window":"19:55\u201322:05","dark_hours":9.26,"date":"2033-03-09","moon_free_dark_hours":2.07,"moon_illumination":69,"moon_separation":29.6,"score":null,"score_astronomy":11,"score_weather":null,"transit_alt":42.9,"transit_local":"18:45","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":2.0,"best_label":"marginal","best_window":"19:55\u201321:55","dark_hours":9.21,"date":"2033-03-10","moon_free_dark_hours":1.35,"moon_illumination":78,"moon_separation":37.8,"score":null,"score_astronomy":10,"score_weather":null,"transit_alt":42.9,"transit_local":"18:45","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":1.83,"best_label":"marginal","best_window":"20:00\u201321:50","dark_hours":9.16,"date":"2033-03-11","moon_free_dark_hours":0.72,"moon_illumination":85,"moon_separation":47.5,"score":null,"score_astronomy":10,"score_weather":null,"transit_alt":42.9,"transit_local":"18:40","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":1.92,"best_label":"marginal","best_window":"20:00\u201321:55","dark_hours":9.11,"date":"2033-03-12","moon_free_dark_hours":0.13,"moon_illumination":91,"moon_separation":57.8,"score":null,"score_astronomy":12,"score_weather":null,"transit_alt":42.9,"transit_local":"18:35","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":2.0,"best_label":"marginal","best_window":"20:00\u201322:00","dark_hours":9.06,"date":"2033-03-13","moon_free_dark_hours":0.0,"moon_illumination":96,"moon_separation":68.4,"score":null,"score_astronomy":14,"score_weather":null,"transit_alt":42.9,"transit_local":"18:30","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":2.08,"best_label":"marginal","best_window":"20:00\u201322:05","dark_hours":9.01,"date":"2033-03-14","moon_free_dark_hours":0.0,"moon_illumination":99,"moon_separation":79.2,"score":null,"score_astronomy":18,"score_weather":null,"transit_alt":42.9,"transit_local":"18:30","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":0.67,"best_label":"good","best_window":"20:05\u201320:45","dark_hours":8.96,"date":"2033-03-15","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":89.9,"score":null,"score_astronomy":22,"score_weather":null,"transit_alt":42.9,"transit_local":"18:25","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":1.17,"best_label":"good","best_window":"20:05\u201321:15","dark_hours":8.91,"date":"2033-03-16","moon_free_dark_hours":0.0,"moon_illumination":99,"moon_separation":100.8,"score":null,"score_astronomy":26,"score_weather":null,"transit_alt":42.9,"transit_local":"18:20","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":1.25,"best_label":"good","best_window":"20:05\u201321:20","dark_hours":8.86,"date":"2033-03-17","moon_free_dark_hours":0.02,"moon_illumination":97,"moon_separation":111.5,"score":null,"score_astronomy":29,"score_weather":null,"transit_alt":42.9,"transit_local":"18:15","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":1.33,"best_label":"good","best_window":"20:05\u201321:25","dark_hours":8.81,"date":"2033-03-18","moon_free_dark_hours":0.95,"moon_illumination":93,"moon_separation":122.1,"score":null,"score_astronomy":34,"score_weather":null,"transit_alt":42.9,"transit_local":"18:10","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":1.25,"best_label":"good","best_window":"20:10\u201321:25","dark_hours":8.76,"date":"2033-03-19","moon_free_dark_hours":1.88,"moon_illumination":87,"moon_separation":132.4,"score":null,"score_astronomy":33,"score_weather":null,"transit_alt":42.9,"transit_local":"18:10","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":1.25,"best_label":"good","best_window":"20:10\u201321:25","dark_hours":8.71,"date":"2033-03-20","moon_free_dark_hours":2.82,"moon_illumination":80,"moon_separation":142.1,"score":null,"score_astronomy":31,"score_weather":null,"transit_alt":42.9,"transit_local":"18:05","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":1.17,"best_label":"good","best_window":"20:10\u201321:20","dark_hours":8.65,"date":"2033-03-21","moon_free_dark_hours":3.73,"moon_illumination":71,"moon_separation":150.4,"score":null,"score_astronomy":30,"score_weather":null,"transit_alt":42.9,"transit_local":"18:00","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":1.08,"best_label":"good","best_window":"20:10\u201321:15","dark_hours":8.6,"date":"2033-03-22","moon_free_dark_hours":4.62,"moon_illumination":62,"moon_separation":155.5,"score":null,"score_astronomy":28,"score_weather":null,"transit_alt":42.9,"transit_local":"17:55","verdict":"unknown","weather_source":"none","weekday":"Tue"}],"note":"score_astronomy for every night; score_weather/score only where a forecast (next 4 days) or ERA5 history exists \u2014 null otherwise","start":"2033-02-21","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"}}
