{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":2.67,"best_label":"good","best_window":"19:20\u201322:00","dark_hours":10.5,"date":"2045-02-08","moon_free_dark_hours":6.63,"moon_illumination":48,"moon_separation":143.8,"score":null,"score_astronomy":66,"score_weather":null,"transit_alt":89.8,"transit_local":"15:50","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":2.5,"best_label":"good","best_window":"19:25\u201321:55","dark_hours":10.46,"date":"2045-02-09","moon_free_dark_hours":7.68,"moon_illumination":39,"moon_separation":135.7,"score":null,"score_astronomy":63,"score_weather":null,"transit_alt":89.7,"transit_local":"15:45","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":2.42,"best_label":"good","best_window":"19:25\u201321:50","dark_hours":10.42,"date":"2045-02-10","moon_free_dark_hours":8.67,"moon_illumination":30,"moon_separation":126.5,"score":null,"score_astronomy":61,"score_weather":null,"transit_alt":89.6,"transit_local":"15:40","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":2.33,"best_label":"good","best_window":"19:25\u201321:45","dark_hours":10.39,"date":"2045-02-11","moon_free_dark_hours":9.53,"moon_illumination":21,"moon_separation":116.7,"score":null,"score_astronomy":59,"score_weather":null,"transit_alt":89.6,"transit_local":"15:40","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":2.33,"best_label":"good","best_window":"19:25\u201321:45","dark_hours":10.35,"date":"2045-02-12","moon_free_dark_hours":10.23,"moon_illumination":14,"moon_separation":106.6,"score":null,"score_astronomy":57,"score_weather":null,"transit_alt":89.8,"transit_local":"15:35","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":2.17,"best_label":"good","best_window":"19:30\u201321:40","dark_hours":10.31,"date":"2045-02-13","moon_free_dark_hours":10.3,"moon_illumination":8,"moon_separation":96.3,"score":null,"score_astronomy":54,"score_weather":null,"transit_alt":89.8,"transit_local":"15:30","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":2.08,"best_label":"good","best_window":"19:30\u201321:35","dark_hours":10.27,"date":"2045-02-14","moon_free_dark_hours":10.25,"moon_illumination":4,"moon_separation":86.0,"score":null,"score_astronomy":52,"score_weather":null,"transit_alt":89.7,"transit_local":"15:25","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":2.0,"best_label":"good","best_window":"19:30\u201321:30","dark_hours":10.23,"date":"2045-02-15","moon_free_dark_hours":10.22,"moon_illumination":1,"moon_separation":75.6,"score":null,"score_astronomy":50,"score_weather":null,"transit_alt":89.5,"transit_local":"15:20","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":1.92,"best_label":"good","best_window":"19:30\u201321:25","dark_hours":10.19,"date":"2045-02-16","moon_free_dark_hours":10.17,"moon_illumination":0,"moon_separation":65.3,"score":null,"score_astronomy":48,"score_weather":null,"transit_alt":89.7,"transit_local":"15:20","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":1.83,"best_label":"good","best_window":"19:35\u201321:25","dark_hours":10.15,"date":"2045-02-17","moon_free_dark_hours":10.13,"moon_illumination":1,"moon_separation":55.3,"score":null,"score_astronomy":45,"score_weather":null,"transit_alt":89.8,"transit_local":"15:15","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":1.75,"best_label":"good","best_window":"19:35\u201321:20","dark_hours":10.11,"date":"2045-02-18","moon_free_dark_hours":10.08,"moon_illumination":4,"moon_separation":45.8,"score":null,"score_astronomy":44,"score_weather":null,"transit_alt":89.8,"transit_local":"15:10","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":1.67,"best_label":"good","best_window":"19:35\u201321:15","dark_hours":10.07,"date":"2045-02-19","moon_free_dark_hours":9.05,"moon_illumination":8,"moon_separation":37.4,"score":null,"score_astronomy":40,"score_weather":null,"transit_alt":89.6,"transit_local":"15:05","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":1.5,"best_label":"good","best_window":"19:35\u201321:05","dark_hours":10.02,"date":"2045-02-20","moon_free_dark_hours":7.97,"moon_illumination":14,"moon_separation":31.2,"score":null,"score_astronomy":35,"score_weather":null,"transit_alt":89.5,"transit_local":"15:05","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":1.33,"best_label":"good","best_window":"19:35\u201320:55","dark_hours":9.98,"date":"2045-02-21","moon_free_dark_hours":6.82,"moon_illumination":22,"moon_separation":28.9,"score":null,"score_astronomy":29,"score_weather":null,"transit_alt":89.7,"transit_local":"15:00","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":1.0,"best_label":"good","best_window":"19:40\u201320:40","dark_hours":9.94,"date":"2045-02-22","moon_free_dark_hours":5.65,"moon_illumination":32,"moon_separation":31.6,"score":null,"score_astronomy":23,"score_weather":null,"transit_alt":89.8,"transit_local":"14:55","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":0.33,"best_label":"good","best_window":"19:40\u201320:00","dark_hours":9.9,"date":"2045-02-23","moon_free_dark_hours":4.42,"moon_illumination":42,"moon_separation":38.5,"score":null,"score_astronomy":18,"score_weather":null,"transit_alt":89.7,"transit_local":"14:50","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":1.75,"best_label":"marginal","best_window":"19:40\u201321:25","dark_hours":9.85,"date":"2045-02-24","moon_free_dark_hours":3.22,"moon_illumination":53,"moon_separation":48.1,"score":null,"score_astronomy":15,"score_weather":null,"transit_alt":89.6,"transit_local":"14:45","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":1.58,"best_label":"marginal","best_window":"19:40\u201321:15","dark_hours":9.81,"date":"2045-02-25","moon_free_dark_hours":2.07,"moon_illumination":64,"moon_separation":59.2,"score":null,"score_astronomy":12,"score_weather":null,"transit_alt":89.6,"transit_local":"14:45","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":1.42,"best_label":"marginal","best_window":"19:45\u201321:10","dark_hours":9.76,"date":"2045-02-26","moon_free_dark_hours":1.08,"moon_illumination":74,"moon_separation":71.3,"score":null,"score_astronomy":11,"score_weather":null,"transit_alt":89.8,"transit_local":"14:40","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":1.42,"best_label":"marginal","best_window":"19:45\u201321:10","dark_hours":9.72,"date":"2045-02-27","moon_free_dark_hours":0.27,"moon_illumination":84,"moon_separation":83.9,"score":null,"score_astronomy":12,"score_weather":null,"transit_alt":89.8,"transit_local":"14:35","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":0.08,"best_label":"good","best_window":"19:45\u201319:50","dark_hours":9.67,"date":"2045-02-28","moon_free_dark_hours":0.0,"moon_illumination":92,"moon_separation":96.9,"score":null,"score_astronomy":14,"score_weather":null,"transit_alt":89.7,"transit_local":"14:30","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":0.5,"best_label":"good","best_window":"19:45\u201320:15","dark_hours":9.63,"date":"2045-03-01","moon_free_dark_hours":0.0,"moon_illumination":97,"moon_separation":109.9,"score":null,"score_astronomy":16,"score_weather":null,"transit_alt":89.5,"transit_local":"14:25","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":0.5,"best_label":"good","best_window":"19:50\u201320:20","dark_hours":9.58,"date":"2045-03-02","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":122.5,"score":null,"score_astronomy":17,"score_weather":null,"transit_alt":89.7,"transit_local":"14:25","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":0.5,"best_label":"good","best_window":"19:50\u201320:20","dark_hours":9.54,"date":"2045-03-03","moon_free_dark_hours":0.0,"moon_illumination":99,"moon_separation":134.1,"score":null,"score_astronomy":17,"score_weather":null,"transit_alt":89.8,"transit_local":"14:20","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":0.42,"best_label":"good","best_window":"19:50\u201320:15","dark_hours":9.49,"date":"2045-03-04","moon_free_dark_hours":0.18,"moon_illumination":96,"moon_separation":143.8,"score":null,"score_astronomy":19,"score_weather":null,"transit_alt":89.8,"transit_local":"14:15","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":0.5,"best_label":"good","best_window":"19:50\u201320:20","dark_hours":9.44,"date":"2045-03-05","moon_free_dark_hours":1.42,"moon_illumination":91,"moon_separation":149.9,"score":null,"score_astronomy":18,"score_weather":null,"transit_alt":89.6,"transit_local":"14:10","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":0.42,"best_label":"good","best_window":"19:50\u201320:15","dark_hours":9.4,"date":"2045-03-06","moon_free_dark_hours":2.63,"moon_illumination":84,"moon_separation":150.7,"score":null,"score_astronomy":16,"score_weather":null,"transit_alt":89.5,"transit_local":"14:10","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":0.33,"best_label":"good","best_window":"19:55\u201320:15","dark_hours":9.35,"date":"2045-03-07","moon_free_dark_hours":3.8,"moon_illumination":75,"moon_separation":146.3,"score":null,"score_astronomy":13,"score_weather":null,"transit_alt":89.7,"transit_local":"14:05","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":0.25,"best_label":"good","best_window":"19:55\u201320:10","dark_hours":9.3,"date":"2045-03-08","moon_free_dark_hours":4.93,"moon_illumination":66,"moon_separation":138.6,"score":null,"score_astronomy":12,"score_weather":null,"transit_alt":89.8,"transit_local":"14:00","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":0.17,"best_label":"good","best_window":"19:55\u201320:05","dark_hours":9.25,"date":"2045-03-09","moon_free_dark_hours":5.98,"moon_illumination":56,"moon_separation":129.5,"score":null,"score_astronomy":11,"score_weather":null,"transit_alt":89.8,"transit_local":"13:55","verdict":"unknown","weather_source":"none","weekday":"Thu"}],"note":"score_astronomy for every night; score_weather/score only where a forecast (next 4 days) or ERA5 history exists \u2014 null otherwise","start":"2045-02-08","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}}