{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":3.67,"best_label":"good","best_window":"19:05\u201322:45","dark_hours":10.98,"date":"2035-01-25","moon_free_dark_hours":0.58,"moon_illumination":94,"moon_separation":119.7,"score":null,"score_astronomy":93,"score_weather":null,"transit_alt":89.6,"transit_local":"16:45","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":3.58,"best_label":"good","best_window":"19:05\u201322:40","dark_hours":10.95,"date":"2035-01-26","moon_free_dark_hours":1.68,"moon_illumination":88,"moon_separation":129.0,"score":null,"score_astronomy":94,"score_weather":null,"transit_alt":89.5,"transit_local":"16:45","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":3.5,"best_label":"good","best_window":"19:10\u201322:40","dark_hours":10.92,"date":"2035-01-27","moon_free_dark_hours":2.72,"moon_illumination":81,"moon_separation":136.6,"score":null,"score_astronomy":94,"score_weather":null,"transit_alt":89.7,"transit_local":"16:40","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":3.58,"best_label":"good","best_window":"19:10\u201322:45","dark_hours":10.89,"date":"2035-01-28","moon_free_dark_hours":3.72,"moon_illumination":72,"moon_separation":141.5,"score":null,"score_astronomy":93,"score_weather":null,"transit_alt":89.8,"transit_local":"16:35","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":3.5,"best_label":"good","best_window":"19:10\u201322:40","dark_hours":10.86,"date":"2035-01-29","moon_free_dark_hours":4.7,"moon_illumination":63,"moon_separation":143.2,"score":null,"score_astronomy":92,"score_weather":null,"transit_alt":89.7,"transit_local":"16:30","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":3.42,"best_label":"good","best_window":"19:10\u201322:35","dark_hours":10.83,"date":"2035-01-30","moon_free_dark_hours":5.65,"moon_illumination":53,"moon_separation":141.5,"score":null,"score_astronomy":90,"score_weather":null,"transit_alt":89.5,"transit_local":"16:25","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":3.25,"best_label":"good","best_window":"19:15\u201322:30","dark_hours":10.8,"date":"2035-01-31","moon_free_dark_hours":6.58,"moon_illumination":44,"moon_separation":136.8,"score":null,"score_astronomy":86,"score_weather":null,"transit_alt":89.6,"transit_local":"16:25","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":3.25,"best_label":"good","best_window":"19:15\u201322:30","dark_hours":10.76,"date":"2035-02-01","moon_free_dark_hours":7.5,"moon_illumination":34,"moon_separation":130.2,"score":null,"score_astronomy":84,"score_weather":null,"transit_alt":89.7,"transit_local":"16:20","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":3.17,"best_label":"good","best_window":"19:15\u201322:25","dark_hours":10.73,"date":"2035-02-02","moon_free_dark_hours":8.37,"moon_illumination":26,"moon_separation":122.4,"score":null,"score_astronomy":81,"score_weather":null,"transit_alt":89.8,"transit_local":"16:15","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":3.08,"best_label":"good","best_window":"19:15\u201322:20","dark_hours":10.7,"date":"2035-02-03","moon_free_dark_hours":9.2,"moon_illumination":18,"moon_separation":113.7,"score":null,"score_astronomy":79,"score_weather":null,"transit_alt":89.7,"transit_local":"16:10","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":3.0,"best_label":"good","best_window":"19:15\u201322:15","dark_hours":10.66,"date":"2035-02-04","moon_free_dark_hours":10.0,"moon_illumination":11,"moon_separation":104.4,"score":null,"score_astronomy":77,"score_weather":null,"transit_alt":89.5,"transit_local":"16:05","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":2.83,"best_label":"good","best_window":"19:20\u201322:10","dark_hours":10.63,"date":"2035-02-05","moon_free_dark_hours":10.62,"moon_illumination":6,"moon_separation":94.8,"score":null,"score_astronomy":73,"score_weather":null,"transit_alt":89.6,"transit_local":"16:05","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":2.83,"best_label":"good","best_window":"19:20\u201322:10","dark_hours":10.59,"date":"2035-02-06","moon_free_dark_hours":10.57,"moon_illumination":2,"moon_separation":84.9,"score":null,"score_astronomy":71,"score_weather":null,"transit_alt":89.8,"transit_local":"16:00","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":2.75,"best_label":"good","best_window":"19:20\u201322:05","dark_hours":10.56,"date":"2035-02-07","moon_free_dark_hours":10.53,"moon_illumination":0,"moon_separation":74.9,"score":null,"score_astronomy":69,"score_weather":null,"transit_alt":89.7,"transit_local":"15:55","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"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"}],"note":"score_astronomy for every night; score_weather/score only where a forecast (next 4 days) or ERA5 history exists \u2014 null otherwise","start":"2035-01-25","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}}