{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":9.17,"best_label":"good","best_window":"20:40\u201305:50","dark_hours":9.17,"date":"2035-10-01","moon_free_dark_hours":9.17,"moon_illumination":0,"moon_separation":140.9,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":89.7,"transit_local":"01:25","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":9.25,"best_label":"good","best_window":"20:35\u201305:50","dark_hours":9.22,"date":"2035-10-02","moon_free_dark_hours":9.2,"moon_illumination":2,"moon_separation":142.6,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":89.8,"transit_local":"01:20","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":9.25,"best_label":"good","best_window":"20:35\u201305:50","dark_hours":9.27,"date":"2035-10-03","moon_free_dark_hours":9.25,"moon_illumination":6,"moon_separation":140.5,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":89.7,"transit_local":"01:15","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":9.25,"best_label":"good","best_window":"20:35\u201305:50","dark_hours":9.31,"date":"2035-10-04","moon_free_dark_hours":8.98,"moon_illumination":12,"moon_separation":135.4,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":89.6,"transit_local":"01:10","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":9.42,"best_label":"good","best_window":"20:30\u201305:55","dark_hours":9.36,"date":"2035-10-05","moon_free_dark_hours":8.4,"moon_illumination":19,"moon_separation":128.3,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":89.6,"transit_local":"01:10","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":9.42,"best_label":"good","best_window":"20:30\u201305:55","dark_hours":9.41,"date":"2035-10-06","moon_free_dark_hours":7.77,"moon_illumination":27,"moon_separation":120.2,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":89.7,"transit_local":"01:05","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":9.42,"best_label":"good","best_window":"20:30\u201305:55","dark_hours":9.45,"date":"2035-10-07","moon_free_dark_hours":7.07,"moon_illumination":36,"moon_separation":111.4,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":89.8,"transit_local":"01:00","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":9.5,"best_label":"good","best_window":"20:25\u201305:55","dark_hours":9.5,"date":"2035-10-08","moon_free_dark_hours":6.3,"moon_illumination":45,"moon_separation":102.3,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":89.7,"transit_local":"00:55","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":9.5,"best_label":"good","best_window":"20:25\u201305:55","dark_hours":9.55,"date":"2035-10-09","moon_free_dark_hours":5.48,"moon_illumination":55,"moon_separation":92.9,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":89.5,"transit_local":"00:50","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":9.58,"best_label":"good","best_window":"20:25\u201306:00","dark_hours":9.59,"date":"2035-10-10","moon_free_dark_hours":4.6,"moon_illumination":64,"moon_separation":83.5,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":89.6,"transit_local":"00:50","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":9.67,"best_label":"good","best_window":"20:20\u201306:00","dark_hours":9.64,"date":"2035-10-11","moon_free_dark_hours":3.7,"moon_illumination":73,"moon_separation":74.0,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":89.8,"transit_local":"00:45","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":9.0,"best_label":"good","best_window":"21:00\u201306:00","dark_hours":9.68,"date":"2035-10-12","moon_free_dark_hours":2.72,"moon_illumination":81,"moon_separation":64.6,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":89.7,"transit_local":"00:40","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":4.58,"best_label":"good","best_window":"01:25\u201306:00","dark_hours":9.73,"date":"2035-10-13","moon_free_dark_hours":1.72,"moon_illumination":89,"moon_separation":55.6,"score":null,"score_astronomy":93,"score_weather":null,"transit_alt":89.6,"transit_local":"00:35","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":0.75,"best_label":"good","best_window":"05:20\u201306:05","dark_hours":9.77,"date":"2035-10-14","moon_free_dark_hours":0.68,"moon_illumination":94,"moon_separation":47.4,"score":null,"score_astronomy":85,"score_weather":null,"transit_alt":89.5,"transit_local":"00:35","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":9.83,"best_label":"marginal","best_window":"20:15\u201306:05","dark_hours":9.81,"date":"2035-10-15","moon_free_dark_hours":0.0,"moon_illumination":98,"moon_separation":41.0,"score":null,"score_astronomy":50,"score_weather":null,"transit_alt":89.7,"transit_local":"00:30","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":9.83,"best_label":"marginal","best_window":"20:15\u201306:05","dark_hours":9.86,"date":"2035-10-16","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":37.6,"score":null,"score_astronomy":46,"score_weather":null,"transit_alt":89.8,"transit_local":"00:25","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":9.92,"best_label":"marginal","best_window":"20:10\u201306:05","dark_hours":9.9,"date":"2035-10-17","moon_free_dark_hours":0.0,"moon_illumination":99,"moon_separation":38.4,"score":null,"score_astronomy":51,"score_weather":null,"transit_alt":89.7,"transit_local":"00:20","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":9.92,"best_label":"marginal","best_window":"20:10\u201306:05","dark_hours":9.94,"date":"2035-10-18","moon_free_dark_hours":0.0,"moon_illumination":96,"moon_separation":43.3,"score":null,"score_astronomy":58,"score_weather":null,"transit_alt":89.6,"transit_local":"00:15","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":2.58,"best_label":"good","best_window":"20:10\u201322:45","dark_hours":9.98,"date":"2035-10-19","moon_free_dark_hours":0.5,"moon_illumination":90,"moon_separation":51.2,"score":null,"score_astronomy":93,"score_weather":null,"transit_alt":89.6,"transit_local":"00:15","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":5.42,"best_label":"good","best_window":"20:10\u201301:35","dark_hours":10.03,"date":"2035-10-20","moon_free_dark_hours":1.32,"moon_illumination":82,"moon_separation":61.0,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":89.7,"transit_local":"00:10","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":8.08,"best_label":"good","best_window":"20:05\u201304:10","dark_hours":10.07,"date":"2035-10-21","moon_free_dark_hours":2.25,"moon_illumination":72,"moon_separation":71.7,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":89.8,"transit_local":"00:05","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":9.58,"best_label":"good","best_window":"20:05\u201305:40","dark_hours":10.11,"date":"2035-10-22","moon_free_dark_hours":3.27,"moon_illumination":61,"moon_separation":82.9,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":89.7,"transit_local":"00:00","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":9.75,"best_label":"good","best_window":"20:05\u201305:50","dark_hours":10.15,"date":"2035-10-23","moon_free_dark_hours":4.33,"moon_illumination":50,"moon_separation":94.1,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":89.5,"transit_local":"23:55","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":9.92,"best_label":"good","best_window":"20:00\u201305:55","dark_hours":10.19,"date":"2035-10-24","moon_free_dark_hours":5.47,"moon_illumination":38,"moon_separation":105.1,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":89.6,"transit_local":"23:55","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":9.92,"best_label":"good","best_window":"20:00\u201305:55","dark_hours":10.23,"date":"2035-10-25","moon_free_dark_hours":6.6,"moon_illumination":28,"moon_separation":115.6,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":89.7,"transit_local":"23:50","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":9.83,"best_label":"good","best_window":"20:00\u201305:50","dark_hours":10.27,"date":"2035-10-26","moon_free_dark_hours":7.72,"moon_illumination":19,"moon_separation":125.3,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":89.8,"transit_local":"23:45","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":9.83,"best_label":"good","best_window":"20:00\u201304:50","dark_hours":10.31,"date":"2035-10-27","moon_free_dark_hours":8.83,"moon_illumination":11,"moon_separation":133.5,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":89.6,"transit_local":"23:40","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":9.83,"best_label":"good","best_window":"18:55\u201304:45","dark_hours":10.35,"date":"2035-10-28","moon_free_dark_hours":9.93,"moon_illumination":5,"moon_separation":139.6,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":89.5,"transit_local":"22:40","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":9.83,"best_label":"good","best_window":"18:55\u201304:45","dark_hours":10.38,"date":"2035-10-29","moon_free_dark_hours":10.37,"moon_illumination":2,"moon_separation":142.5,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":89.7,"transit_local":"22:35","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":9.75,"best_label":"good","best_window":"18:55\u201304:40","dark_hours":10.42,"date":"2035-10-30","moon_free_dark_hours":10.4,"moon_illumination":0,"moon_separation":141.6,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":89.8,"transit_local":"22:30","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":"2035-10-01","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}}