{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":2.67,"best_label":"good","best_window":"19:20\u201322:00","dark_hours":10.52,"date":"2035-02-08","moon_free_dark_hours":10.5,"moon_illumination":0,"moon_separation":65.0,"score":null,"score_astronomy":67,"score_weather":null,"transit_alt":89.6,"transit_local":"15:50","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":2.5,"best_label":"good","best_window":"19:25\u201321:55","dark_hours":10.48,"date":"2035-02-09","moon_free_dark_hours":10.47,"moon_illumination":3,"moon_separation":55.6,"score":null,"score_astronomy":64,"score_weather":null,"transit_alt":89.5,"transit_local":"15:50","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":2.5,"best_label":"good","best_window":"19:25\u201321:55","dark_hours":10.45,"date":"2035-02-10","moon_free_dark_hours":9.72,"moon_illumination":7,"moon_separation":47.2,"score":null,"score_astronomy":59,"score_weather":null,"transit_alt":89.7,"transit_local":"15:45","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":2.42,"best_label":"good","best_window":"19:25\u201321:50","dark_hours":10.41,"date":"2035-02-11","moon_free_dark_hours":8.62,"moon_illumination":14,"moon_separation":40.6,"score":null,"score_astronomy":53,"score_weather":null,"transit_alt":89.8,"transit_local":"15:40","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":2.17,"best_label":"good","best_window":"19:25\u201321:35","dark_hours":10.37,"date":"2035-02-12","moon_free_dark_hours":7.5,"moon_illumination":22,"moon_separation":37.1,"score":null,"score_astronomy":45,"score_weather":null,"transit_alt":89.7,"transit_local":"15:35","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":1.92,"best_label":"good","best_window":"19:25\u201321:20","dark_hours":10.33,"date":"2035-02-13","moon_free_dark_hours":6.35,"moon_illumination":32,"moon_separation":37.8,"score":null,"score_astronomy":37,"score_weather":null,"transit_alt":89.6,"transit_local":"15:30","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":1.58,"best_label":"good","best_window":"19:30\u201321:05","dark_hours":10.29,"date":"2035-02-14","moon_free_dark_hours":5.22,"moon_illumination":43,"moon_separation":42.6,"score":null,"score_astronomy":29,"score_weather":null,"transit_alt":89.6,"transit_local":"15:30","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":0.08,"best_label":"good","best_window":"19:30\u201319:35","dark_hours":10.25,"date":"2035-02-15","moon_free_dark_hours":4.08,"moon_illumination":54,"moon_separation":50.3,"score":null,"score_astronomy":23,"score_weather":null,"transit_alt":89.7,"transit_local":"15:25","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":2.42,"best_label":"marginal","best_window":"19:30\u201321:55","dark_hours":10.21,"date":"2035-02-16","moon_free_dark_hours":2.98,"moon_illumination":66,"moon_separation":60.0,"score":null,"score_astronomy":20,"score_weather":null,"transit_alt":89.8,"transit_local":"15:20","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":2.25,"best_label":"marginal","best_window":"19:30\u201321:45","dark_hours":10.17,"date":"2035-02-17","moon_free_dark_hours":1.92,"moon_illumination":76,"moon_separation":70.7,"score":null,"score_astronomy":19,"score_weather":null,"transit_alt":89.7,"transit_local":"15:15","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":2.17,"best_label":"marginal","best_window":"19:35\u201321:45","dark_hours":10.13,"date":"2035-02-18","moon_free_dark_hours":0.97,"moon_illumination":85,"moon_separation":81.9,"score":null,"score_astronomy":19,"score_weather":null,"transit_alt":89.5,"transit_local":"15:10","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":0.5,"best_label":"good","best_window":"19:35\u201320:05","dark_hours":10.09,"date":"2035-02-19","moon_free_dark_hours":0.1,"moon_illumination":92,"moon_separation":93.4,"score":null,"score_astronomy":22,"score_weather":null,"transit_alt":89.6,"transit_local":"15:10","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":1.17,"best_label":"good","best_window":"19:35\u201320:45","dark_hours":10.05,"date":"2035-02-20","moon_free_dark_hours":0.0,"moon_illumination":97,"moon_separation":104.6,"score":null,"score_astronomy":25,"score_weather":null,"transit_alt":89.7,"transit_local":"15:05","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":1.25,"best_label":"good","best_window":"19:35\u201320:50","dark_hours":10.01,"date":"2035-02-21","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":115.4,"score":null,"score_astronomy":29,"score_weather":null,"transit_alt":89.7,"transit_local":"15:00","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":1.25,"best_label":"good","best_window":"19:40\u201320:55","dark_hours":9.96,"date":"2035-02-22","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":125.3,"score":null,"score_astronomy":30,"score_weather":null,"transit_alt":89.6,"transit_local":"14:55","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":1.17,"best_label":"good","best_window":"19:40\u201320:50","dark_hours":9.92,"date":"2035-02-23","moon_free_dark_hours":0.0,"moon_illumination":97,"moon_separation":133.7,"score":null,"score_astronomy":30,"score_weather":null,"transit_alt":89.5,"transit_local":"14:55","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":1.17,"best_label":"good","best_window":"19:40\u201320:50","dark_hours":9.88,"date":"2035-02-24","moon_free_dark_hours":0.93,"moon_illumination":92,"moon_separation":139.8,"score":null,"score_astronomy":32,"score_weather":null,"transit_alt":89.7,"transit_local":"14:50","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":1.25,"best_label":"good","best_window":"19:40\u201320:55","dark_hours":9.83,"date":"2035-02-25","moon_free_dark_hours":1.95,"moon_illumination":86,"moon_separation":142.9,"score":null,"score_astronomy":32,"score_weather":null,"transit_alt":89.8,"transit_local":"14:45","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":1.17,"best_label":"good","best_window":"19:40\u201320:50","dark_hours":9.79,"date":"2035-02-26","moon_free_dark_hours":2.93,"moon_illumination":79,"moon_separation":142.4,"score":null,"score_astronomy":31,"score_weather":null,"transit_alt":89.7,"transit_local":"14:40","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":1.0,"best_label":"good","best_window":"19:45\u201320:45","dark_hours":9.75,"date":"2035-02-27","moon_free_dark_hours":3.87,"moon_illumination":70,"moon_separation":138.6,"score":null,"score_astronomy":28,"score_weather":null,"transit_alt":89.6,"transit_local":"14:35","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":0.92,"best_label":"good","best_window":"19:45\u201320:40","dark_hours":9.7,"date":"2035-02-28","moon_free_dark_hours":4.8,"moon_illumination":61,"moon_separation":132.6,"score":null,"score_astronomy":27,"score_weather":null,"transit_alt":89.6,"transit_local":"14:35","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":0.92,"best_label":"good","best_window":"19:45\u201320:40","dark_hours":9.66,"date":"2035-03-01","moon_free_dark_hours":5.68,"moon_illumination":52,"moon_separation":125.1,"score":null,"score_astronomy":25,"score_weather":null,"transit_alt":89.7,"transit_local":"14:30","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":0.83,"best_label":"good","best_window":"19:45\u201320:35","dark_hours":9.61,"date":"2035-03-02","moon_free_dark_hours":6.55,"moon_illumination":42,"moon_separation":116.6,"score":null,"score_astronomy":23,"score_weather":null,"transit_alt":89.8,"transit_local":"14:25","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":0.67,"best_label":"good","best_window":"19:50\u201320:30","dark_hours":9.56,"date":"2035-03-03","moon_free_dark_hours":7.35,"moon_illumination":33,"moon_separation":107.6,"score":null,"score_astronomy":22,"score_weather":null,"transit_alt":89.7,"transit_local":"14:20","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":0.58,"best_label":"good","best_window":"19:50\u201320:25","dark_hours":9.52,"date":"2035-03-04","moon_free_dark_hours":8.1,"moon_illumination":24,"moon_separation":98.2,"score":null,"score_astronomy":20,"score_weather":null,"transit_alt":89.5,"transit_local":"14:15","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":0.5,"best_label":"good","best_window":"19:50\u201320:20","dark_hours":9.47,"date":"2035-03-05","moon_free_dark_hours":8.78,"moon_illumination":17,"moon_separation":88.4,"score":null,"score_astronomy":18,"score_weather":null,"transit_alt":89.6,"transit_local":"14:15","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":0.5,"best_label":"good","best_window":"19:50\u201320:20","dark_hours":9.42,"date":"2035-03-06","moon_free_dark_hours":9.4,"moon_illumination":10,"moon_separation":78.5,"score":null,"score_astronomy":17,"score_weather":null,"transit_alt":89.7,"transit_local":"14:10","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":0.33,"best_label":"good","best_window":"19:55\u201320:15","dark_hours":9.38,"date":"2035-03-07","moon_free_dark_hours":9.35,"moon_illumination":5,"moon_separation":68.5,"score":null,"score_astronomy":14,"score_weather":null,"transit_alt":89.7,"transit_local":"14:05","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":0.25,"best_label":"good","best_window":"19:55\u201320:10","dark_hours":9.33,"date":"2035-03-08","moon_free_dark_hours":9.32,"moon_illumination":1,"moon_separation":58.8,"score":null,"score_astronomy":13,"score_weather":null,"transit_alt":89.6,"transit_local":"14:00","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":0.17,"best_label":"good","best_window":"19:55\u201320:05","dark_hours":9.28,"date":"2035-03-09","moon_free_dark_hours":9.27,"moon_illumination":0,"moon_separation":49.8,"score":null,"score_astronomy":11,"score_weather":null,"transit_alt":89.5,"transit_local":"14:00","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":"2035-02-08","target":{"common_name":"Andromeda Galaxy","dec":41.26875,"morphology":"SA(s)b","name":"M 31","ra":10.68470833,"simbad_url":"https://simbad.cds.unistra.fr/simbad/sim-id?Ident=M31","source":"sesame","type":"AGN","type_text":"galaxy with an active nucleus","vmag":3.44}}