{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":7.5,"best_label":"good","best_window":"18:35\u201302:05","dark_hours":11.43,"date":"2034-12-08","moon_free_dark_hours":11.42,"moon_illumination":3,"moon_separation":133.6,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":89.8,"transit_local":"19:55","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":7.42,"best_label":"good","best_window":"18:35\u201302:00","dark_hours":11.44,"date":"2034-12-09","moon_free_dark_hours":11.42,"moon_illumination":1,"moon_separation":126.2,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":89.6,"transit_local":"19:50","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":7.33,"best_label":"good","best_window":"18:35\u201301:55","dark_hours":11.45,"date":"2034-12-10","moon_free_dark_hours":11.43,"moon_illumination":0,"moon_separation":117.7,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":89.5,"transit_local":"19:50","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":7.25,"best_label":"good","best_window":"18:35\u201301:50","dark_hours":11.46,"date":"2034-12-11","moon_free_dark_hours":11.45,"moon_illumination":1,"moon_separation":108.6,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":89.7,"transit_local":"19:45","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":7.25,"best_label":"good","best_window":"18:35\u201301:50","dark_hours":11.47,"date":"2034-12-12","moon_free_dark_hours":11.47,"moon_illumination":4,"moon_separation":99.1,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":89.8,"transit_local":"19:40","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":7.17,"best_label":"good","best_window":"18:35\u201301:45","dark_hours":11.48,"date":"2034-12-13","moon_free_dark_hours":10.67,"moon_illumination":9,"moon_separation":89.4,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":89.7,"transit_local":"19:35","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":7.08,"best_label":"good","best_window":"18:35\u201301:40","dark_hours":11.49,"date":"2034-12-14","moon_free_dark_hours":9.75,"moon_illumination":15,"moon_separation":79.6,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":89.6,"transit_local":"19:30","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":7.0,"best_label":"good","best_window":"18:35\u201301:35","dark_hours":11.49,"date":"2034-12-15","moon_free_dark_hours":8.8,"moon_illumination":22,"moon_separation":69.8,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":89.5,"transit_local":"19:30","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":7.0,"best_label":"good","best_window":"18:35\u201301:35","dark_hours":11.5,"date":"2034-12-16","moon_free_dark_hours":7.78,"moon_illumination":31,"moon_separation":60.3,"score":null,"score_astronomy":99,"score_weather":null,"transit_alt":89.7,"transit_local":"19:25","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":6.92,"best_label":"good","best_window":"18:35\u201301:30","dark_hours":11.5,"date":"2034-12-17","moon_free_dark_hours":6.77,"moon_illumination":41,"moon_separation":51.3,"score":null,"score_astronomy":91,"score_weather":null,"transit_alt":89.8,"transit_local":"19:20","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":6.83,"best_label":"good","best_window":"18:35\u201301:25","dark_hours":11.5,"date":"2034-12-18","moon_free_dark_hours":5.68,"moon_illumination":52,"moon_separation":43.5,"score":null,"score_astronomy":83,"score_weather":null,"transit_alt":89.7,"transit_local":"19:15","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":3.33,"best_label":"good","best_window":"20:40\u201300:00","dark_hours":11.51,"date":"2034-12-19","moon_free_dark_hours":4.6,"moon_illumination":63,"moon_separation":38.1,"score":null,"score_astronomy":63,"score_weather":null,"transit_alt":89.5,"transit_local":"19:10","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":7.17,"best_label":"marginal","best_window":"18:35\u201301:45","dark_hours":11.51,"date":"2034-12-20","moon_free_dark_hours":3.47,"moon_illumination":74,"moon_separation":36.5,"score":null,"score_astronomy":49,"score_weather":null,"transit_alt":89.6,"transit_local":"19:10","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":6.83,"best_label":"marginal","best_window":"18:35\u201301:25","dark_hours":11.51,"date":"2034-12-21","moon_free_dark_hours":2.28,"moon_illumination":83,"moon_separation":39.6,"score":null,"score_astronomy":38,"score_weather":null,"transit_alt":89.7,"transit_local":"19:05","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":6.5,"best_label":"marginal","best_window":"18:35\u201301:05","dark_hours":11.51,"date":"2034-12-22","moon_free_dark_hours":1.12,"moon_illumination":91,"moon_separation":46.7,"score":null,"score_astronomy":37,"score_weather":null,"transit_alt":89.8,"transit_local":"19:00","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":6.33,"best_label":"marginal","best_window":"18:40\u201301:00","dark_hours":11.51,"date":"2034-12-23","moon_free_dark_hours":0.0,"moon_illumination":97,"moon_separation":56.5,"score":null,"score_astronomy":43,"score_weather":null,"transit_alt":89.6,"transit_local":"18:55","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":0.83,"best_label":"good","best_window":"18:40\u201319:30","dark_hours":11.5,"date":"2034-12-24","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":67.6,"score":null,"score_astronomy":57,"score_weather":null,"transit_alt":89.5,"transit_local":"18:55","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":3.25,"best_label":"good","best_window":"18:40\u201321:55","dark_hours":11.5,"date":"2034-12-25","moon_free_dark_hours":0.0,"moon_illumination":99,"moon_separation":79.5,"score":null,"score_astronomy":73,"score_weather":null,"transit_alt":89.6,"transit_local":"18:50","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":4.67,"best_label":"good","best_window":"18:40\u201323:20","dark_hours":11.5,"date":"2034-12-26","moon_free_dark_hours":0.03,"moon_illumination":96,"moon_separation":91.4,"score":null,"score_astronomy":82,"score_weather":null,"transit_alt":89.8,"transit_local":"18:45","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":5.67,"best_label":"good","best_window":"18:40\u201300:20","dark_hours":11.49,"date":"2034-12-27","moon_free_dark_hours":1.17,"moon_illumination":91,"moon_separation":103.0,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":89.7,"transit_local":"18:40","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":5.83,"best_label":"good","best_window":"18:40\u201300:30","dark_hours":11.48,"date":"2034-12-28","moon_free_dark_hours":2.27,"moon_illumination":83,"moon_separation":114.0,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":89.6,"transit_local":"18:35","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":5.92,"best_label":"good","best_window":"18:40\u201300:35","dark_hours":11.48,"date":"2034-12-29","moon_free_dark_hours":3.37,"moon_illumination":74,"moon_separation":123.9,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":89.5,"transit_local":"18:35","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":5.83,"best_label":"good","best_window":"18:40\u201300:30","dark_hours":11.47,"date":"2034-12-30","moon_free_dark_hours":4.42,"moon_illumination":65,"moon_separation":132.4,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":89.7,"transit_local":"18:30","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":5.75,"best_label":"good","best_window":"18:45\u201300:30","dark_hours":11.46,"date":"2034-12-31","moon_free_dark_hours":5.42,"moon_illumination":55,"moon_separation":138.9,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":89.8,"transit_local":"18:25","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":5.75,"best_label":"good","best_window":"18:45\u201300:30","dark_hours":11.45,"date":"2035-01-01","moon_free_dark_hours":6.38,"moon_illumination":45,"moon_separation":142.7,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":89.7,"transit_local":"18:20","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":5.67,"best_label":"good","best_window":"18:45\u201300:25","dark_hours":11.44,"date":"2035-01-02","moon_free_dark_hours":7.35,"moon_illumination":36,"moon_separation":143.2,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":89.5,"transit_local":"18:15","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":5.58,"best_label":"good","best_window":"18:45\u201300:20","dark_hours":11.43,"date":"2035-01-03","moon_free_dark_hours":8.28,"moon_illumination":27,"moon_separation":140.5,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":89.6,"transit_local":"18:15","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":5.58,"best_label":"good","best_window":"18:45\u201300:20","dark_hours":11.42,"date":"2035-01-04","moon_free_dark_hours":9.2,"moon_illumination":19,"moon_separation":135.2,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":89.7,"transit_local":"18:10","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":5.5,"best_label":"good","best_window":"18:45\u201300:15","dark_hours":11.4,"date":"2035-01-05","moon_free_dark_hours":10.08,"moon_illumination":12,"moon_separation":128.1,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":89.8,"transit_local":"18:05","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":5.33,"best_label":"good","best_window":"18:50\u201300:10","dark_hours":11.39,"date":"2035-01-06","moon_free_dark_hours":10.95,"moon_illumination":7,"moon_separation":119.9,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":89.6,"transit_local":"18:00","verdict":"unknown","weather_source":"none","weekday":"Sat"}],"note":"score_astronomy for every night; score_weather/score only where a forecast (next 4 days) or ERA5 history exists \u2014 null otherwise","start":"2034-12-08","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}}