{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":1.17,"best_label":"good","best_window":"02:30\u201303:40","dark_hours":4.48,"date":"2034-06-13","moon_free_dark_hours":4.47,"moon_illumination":9,"moon_separation":41.7,"score":null,"score_astronomy":33,"score_weather":null,"transit_alt":89.8,"transit_local":"08:35","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":1.17,"best_label":"good","best_window":"02:30\u201303:40","dark_hours":4.47,"date":"2034-06-14","moon_free_dark_hours":4.45,"moon_illumination":4,"moon_separation":50.3,"score":null,"score_astronomy":35,"score_weather":null,"transit_alt":89.7,"transit_local":"08:30","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":1.25,"best_label":"good","best_window":"02:25\u201303:40","dark_hours":4.45,"date":"2034-06-15","moon_free_dark_hours":4.43,"moon_illumination":1,"moon_separation":60.8,"score":null,"score_astronomy":37,"score_weather":null,"transit_alt":89.5,"transit_local":"08:25","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":1.33,"best_label":"good","best_window":"02:20\u201303:40","dark_hours":4.44,"date":"2034-06-16","moon_free_dark_hours":4.43,"moon_illumination":0,"moon_separation":72.2,"score":null,"score_astronomy":38,"score_weather":null,"transit_alt":89.6,"transit_local":"08:25","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":1.42,"best_label":"good","best_window":"02:15\u201303:40","dark_hours":4.43,"date":"2034-06-17","moon_free_dark_hours":4.42,"moon_illumination":3,"moon_separation":83.9,"score":null,"score_astronomy":39,"score_weather":null,"transit_alt":89.7,"transit_local":"08:20","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":1.5,"best_label":"good","best_window":"02:10\u201303:40","dark_hours":4.43,"date":"2034-06-18","moon_free_dark_hours":4.42,"moon_illumination":9,"moon_separation":95.4,"score":null,"score_astronomy":41,"score_weather":null,"transit_alt":89.7,"transit_local":"08:15","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":1.5,"best_label":"good","best_window":"02:10\u201303:40","dark_hours":4.42,"date":"2034-06-19","moon_free_dark_hours":4.37,"moon_illumination":16,"moon_separation":106.4,"score":null,"score_astronomy":42,"score_weather":null,"transit_alt":89.6,"transit_local":"08:10","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":1.58,"best_label":"good","best_window":"02:05\u201303:40","dark_hours":4.42,"date":"2034-06-20","moon_free_dark_hours":3.73,"moon_illumination":24,"moon_separation":116.8,"score":null,"score_astronomy":44,"score_weather":null,"transit_alt":89.5,"transit_local":"08:10","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":1.67,"best_label":"good","best_window":"02:00\u201303:40","dark_hours":4.42,"date":"2034-06-21","moon_free_dark_hours":3.18,"moon_illumination":34,"moon_separation":126.1,"score":null,"score_astronomy":46,"score_weather":null,"transit_alt":89.7,"transit_local":"08:05","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":1.75,"best_label":"good","best_window":"01:55\u201303:40","dark_hours":4.43,"date":"2034-06-22","moon_free_dark_hours":2.67,"moon_illumination":43,"moon_separation":134.2,"score":null,"score_astronomy":47,"score_weather":null,"transit_alt":89.8,"transit_local":"08:00","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":1.83,"best_label":"good","best_window":"01:50\u201303:40","dark_hours":4.43,"date":"2034-06-23","moon_free_dark_hours":2.2,"moon_illumination":53,"moon_separation":140.3,"score":null,"score_astronomy":48,"score_weather":null,"transit_alt":89.7,"transit_local":"07:55","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":1.75,"best_label":"good","best_window":"01:55\u201303:40","dark_hours":4.44,"date":"2034-06-24","moon_free_dark_hours":1.72,"moon_illumination":63,"moon_separation":143.7,"score":null,"score_astronomy":50,"score_weather":null,"transit_alt":89.6,"transit_local":"07:50","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":1.83,"best_label":"good","best_window":"01:50\u201303:40","dark_hours":4.45,"date":"2034-06-25","moon_free_dark_hours":1.23,"moon_illumination":72,"moon_separation":143.9,"score":null,"score_astronomy":51,"score_weather":null,"transit_alt":89.6,"transit_local":"07:50","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":1.83,"best_label":"good","best_window":"01:50\u201303:40","dark_hours":4.46,"date":"2034-06-26","moon_free_dark_hours":0.7,"moon_illumination":80,"moon_separation":140.9,"score":null,"score_astronomy":52,"score_weather":null,"transit_alt":89.7,"transit_local":"07:45","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":1.92,"best_label":"good","best_window":"01:45\u201303:40","dark_hours":4.47,"date":"2034-06-27","moon_free_dark_hours":0.13,"moon_illumination":87,"moon_separation":135.3,"score":null,"score_astronomy":52,"score_weather":null,"transit_alt":89.8,"transit_local":"07:40","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":1.92,"best_label":"good","best_window":"01:45\u201303:40","dark_hours":4.48,"date":"2034-06-28","moon_free_dark_hours":0.0,"moon_illumination":92,"moon_separation":127.9,"score":null,"score_astronomy":49,"score_weather":null,"transit_alt":89.7,"transit_local":"07:35","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":2.0,"best_label":"good","best_window":"01:40\u201303:40","dark_hours":4.5,"date":"2034-06-29","moon_free_dark_hours":0.0,"moon_illumination":97,"moon_separation":119.3,"score":null,"score_astronomy":48,"score_weather":null,"transit_alt":89.5,"transit_local":"07:30","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":2.0,"best_label":"good","best_window":"01:45\u201303:45","dark_hours":4.52,"date":"2034-06-30","moon_free_dark_hours":0.0,"moon_illumination":99,"moon_separation":110.0,"score":null,"score_astronomy":45,"score_weather":null,"transit_alt":89.6,"transit_local":"07:30","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":1.92,"best_label":"good","best_window":"01:50\u201303:45","dark_hours":4.54,"date":"2034-07-01","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":100.1,"score":null,"score_astronomy":40,"score_weather":null,"transit_alt":89.7,"transit_local":"07:25","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":1.5,"best_label":"good","best_window":"02:15\u201303:45","dark_hours":4.56,"date":"2034-07-02","moon_free_dark_hours":0.0,"moon_illumination":98,"moon_separation":89.9,"score":null,"score_astronomy":35,"score_weather":null,"transit_alt":89.7,"transit_local":"07:20","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":0.67,"best_label":"good","best_window":"03:05\u201303:45","dark_hours":4.59,"date":"2034-07-03","moon_free_dark_hours":0.0,"moon_illumination":95,"moon_separation":79.6,"score":null,"score_astronomy":31,"score_weather":null,"transit_alt":89.6,"transit_local":"07:15","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":3.08,"best_label":"marginal","best_window":"00:40\u201303:45","dark_hours":4.61,"date":"2034-07-04","moon_free_dark_hours":0.0,"moon_illumination":89,"moon_separation":69.3,"score":null,"score_astronomy":29,"score_weather":null,"transit_alt":89.5,"transit_local":"07:15","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":3.25,"best_label":"marginal","best_window":"00:35\u201303:50","dark_hours":4.64,"date":"2034-07-05","moon_free_dark_hours":0.18,"moon_illumination":82,"moon_separation":59.2,"score":null,"score_astronomy":29,"score_weather":null,"transit_alt":89.7,"transit_local":"07:10","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":3.33,"best_label":"marginal","best_window":"00:30\u201303:50","dark_hours":4.67,"date":"2034-07-06","moon_free_dark_hours":0.77,"moon_illumination":73,"moon_separation":49.9,"score":null,"score_astronomy":30,"score_weather":null,"transit_alt":89.8,"transit_local":"07:05","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":1.42,"best_label":"good","best_window":"02:25\u201303:50","dark_hours":4.7,"date":"2034-07-07","moon_free_dark_hours":1.32,"moon_illumination":63,"moon_separation":42.1,"score":null,"score_astronomy":35,"score_weather":null,"transit_alt":89.7,"transit_local":"07:00","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":2.5,"best_label":"good","best_window":"01:20\u201303:50","dark_hours":4.73,"date":"2034-07-08","moon_free_dark_hours":1.92,"moon_illumination":52,"moon_separation":37.0,"score":null,"score_astronomy":43,"score_weather":null,"transit_alt":89.6,"transit_local":"06:55","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":3.0,"best_label":"good","best_window":"00:50\u201303:50","dark_hours":4.77,"date":"2034-07-09","moon_free_dark_hours":2.53,"moon_illumination":40,"moon_separation":36.1,"score":null,"score_astronomy":59,"score_weather":null,"transit_alt":89.6,"transit_local":"06:55","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":3.17,"best_label":"good","best_window":"00:45\u201303:55","dark_hours":4.8,"date":"2034-07-10","moon_free_dark_hours":3.2,"moon_illumination":29,"moon_separation":39.8,"score":null,"score_astronomy":71,"score_weather":null,"transit_alt":89.7,"transit_local":"06:50","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":3.25,"best_label":"good","best_window":"00:40\u201303:55","dark_hours":4.84,"date":"2034-07-11","moon_free_dark_hours":3.97,"moon_illumination":19,"moon_separation":47.2,"score":null,"score_astronomy":79,"score_weather":null,"transit_alt":89.8,"transit_local":"06:45","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":3.33,"best_label":"good","best_window":"00:35\u201303:55","dark_hours":4.88,"date":"2034-07-12","moon_free_dark_hours":4.82,"moon_illumination":11,"moon_separation":56.9,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":89.7,"transit_local":"06:40","verdict":"unknown","weather_source":"none","weekday":"Wed"}],"note":"score_astronomy for every night; score_weather/score only where a forecast (next 4 days) or ERA5 history exists \u2014 null otherwise","start":"2034-06-13","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}}