{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":5.25,"best_label":"good","best_window":"23:15\u201304:30","dark_hours":5.92,"date":"2029-08-02","moon_free_dark_hours":1.67,"moon_illumination":46,"moon_separation":34.0,"score":null,"score_astronomy":83,"score_weather":null,"transit_alt":89.5,"transit_local":"05:20","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":5.33,"best_label":"good","best_window":"23:10\u201304:30","dark_hours":5.97,"date":"2029-08-03","moon_free_dark_hours":2.3,"moon_illumination":36,"moon_separation":41.3,"score":null,"score_astronomy":87,"score_weather":null,"transit_alt":89.6,"transit_local":"05:15","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":5.42,"best_label":"good","best_window":"23:05\u201304:30","dark_hours":6.03,"date":"2029-08-04","moon_free_dark_hours":3.07,"moon_illumination":27,"moon_separation":50.4,"score":null,"score_astronomy":93,"score_weather":null,"transit_alt":89.7,"transit_local":"05:10","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":5.5,"best_label":"good","best_window":"23:00\u201304:30","dark_hours":6.09,"date":"2029-08-05","moon_free_dark_hours":3.97,"moon_illumination":19,"moon_separation":60.5,"score":null,"score_astronomy":99,"score_weather":null,"transit_alt":89.7,"transit_local":"05:05","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":5.58,"best_label":"good","best_window":"23:00\u201304:35","dark_hours":6.14,"date":"2029-08-06","moon_free_dark_hours":4.98,"moon_illumination":11,"moon_separation":71.4,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":89.6,"transit_local":"05:00","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":5.67,"best_label":"good","best_window":"22:55\u201304:35","dark_hours":6.2,"date":"2029-08-07","moon_free_dark_hours":6.1,"moon_illumination":6,"moon_separation":82.8,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":89.5,"transit_local":"05:00","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":5.75,"best_label":"good","best_window":"22:50\u201304:35","dark_hours":6.26,"date":"2029-08-08","moon_free_dark_hours":6.23,"moon_illumination":2,"moon_separation":94.7,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":89.7,"transit_local":"04:55","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":5.92,"best_label":"good","best_window":"22:45\u201304:40","dark_hours":6.31,"date":"2029-08-09","moon_free_dark_hours":6.3,"moon_illumination":0,"moon_separation":106.8,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":89.7,"transit_local":"04:50","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":6.0,"best_label":"good","best_window":"22:40\u201304:40","dark_hours":6.37,"date":"2029-08-10","moon_free_dark_hours":6.35,"moon_illumination":1,"moon_separation":118.8,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":89.7,"transit_local":"04:45","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":6.0,"best_label":"good","best_window":"22:40\u201304:40","dark_hours":6.43,"date":"2029-08-11","moon_free_dark_hours":6.42,"moon_illumination":5,"moon_separation":130.5,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":89.5,"transit_local":"04:40","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":6.17,"best_label":"good","best_window":"22:35\u201304:45","dark_hours":6.49,"date":"2029-08-12","moon_free_dark_hours":6.47,"moon_illumination":11,"moon_separation":140.9,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":89.6,"transit_local":"04:40","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":6.25,"best_label":"good","best_window":"22:30\u201304:45","dark_hours":6.54,"date":"2029-08-13","moon_free_dark_hours":6.53,"moon_illumination":19,"moon_separation":148.6,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":89.7,"transit_local":"04:35","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":6.33,"best_label":"good","best_window":"22:25\u201304:45","dark_hours":6.6,"date":"2029-08-14","moon_free_dark_hours":6.43,"moon_illumination":29,"moon_separation":151.3,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":89.7,"transit_local":"04:30","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":6.42,"best_label":"good","best_window":"22:25\u201304:50","dark_hours":6.66,"date":"2029-08-15","moon_free_dark_hours":5.87,"moon_illumination":40,"moon_separation":147.8,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":89.6,"transit_local":"04:25","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":6.42,"best_label":"good","best_window":"22:25\u201304:50","dark_hours":6.72,"date":"2029-08-16","moon_free_dark_hours":5.17,"moon_illumination":52,"moon_separation":139.8,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":89.5,"transit_local":"04:25","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":6.5,"best_label":"good","best_window":"22:20\u201304:50","dark_hours":6.77,"date":"2029-08-17","moon_free_dark_hours":4.37,"moon_illumination":63,"moon_separation":129.6,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":89.6,"transit_local":"04:20","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":6.5,"best_label":"good","best_window":"22:20\u201304:50","dark_hours":6.83,"date":"2029-08-18","moon_free_dark_hours":3.43,"moon_illumination":73,"moon_separation":118.4,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":89.7,"transit_local":"04:15","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":6.5,"best_label":"good","best_window":"22:25\u201304:55","dark_hours":6.89,"date":"2029-08-19","moon_free_dark_hours":2.4,"moon_illumination":82,"moon_separation":106.8,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":89.7,"transit_local":"04:10","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":6.42,"best_label":"good","best_window":"22:30\u201304:55","dark_hours":6.95,"date":"2029-08-20","moon_free_dark_hours":1.3,"moon_illumination":90,"moon_separation":95.2,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":89.6,"transit_local":"04:05","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":5.58,"best_label":"good","best_window":"23:20\u201304:55","dark_hours":7.0,"date":"2029-08-21","moon_free_dark_hours":0.22,"moon_illumination":95,"moon_separation":83.7,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":89.5,"transit_local":"04:05","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":4.0,"best_label":"good","best_window":"01:00\u201305:00","dark_hours":7.06,"date":"2029-08-22","moon_free_dark_hours":0.0,"moon_illumination":98,"moon_separation":72.4,"score":null,"score_astronomy":72,"score_weather":null,"transit_alt":89.7,"transit_local":"04:00","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":0.42,"best_label":"good","best_window":"04:35\u201305:00","dark_hours":7.12,"date":"2029-08-23","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":61.6,"score":null,"score_astronomy":62,"score_weather":null,"transit_alt":89.7,"transit_local":"03:55","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":7.17,"best_label":"marginal","best_window":"21:50\u201305:00","dark_hours":7.17,"date":"2029-08-24","moon_free_dark_hours":0.0,"moon_illumination":99,"moon_separation":51.4,"score":null,"score_astronomy":46,"score_weather":null,"transit_alt":89.7,"transit_local":"03:50","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":7.25,"best_label":"marginal","best_window":"21:50\u201305:05","dark_hours":7.23,"date":"2029-08-25","moon_free_dark_hours":0.0,"moon_illumination":96,"moon_separation":42.2,"score":null,"score_astronomy":35,"score_weather":null,"transit_alt":89.5,"transit_local":"03:45","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":7.33,"best_label":"marginal","best_window":"21:45\u201305:05","dark_hours":7.29,"date":"2029-08-26","moon_free_dark_hours":0.0,"moon_illumination":92,"moon_separation":34.6,"score":null,"score_astronomy":35,"score_weather":null,"transit_alt":89.6,"transit_local":"03:45","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":7.33,"best_label":"marginal","best_window":"21:45\u201305:05","dark_hours":7.35,"date":"2029-08-27","moon_free_dark_hours":0.0,"moon_illumination":86,"moon_separation":29.8,"score":null,"score_astronomy":39,"score_weather":null,"transit_alt":89.7,"transit_local":"03:40","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":7.58,"best_label":"marginal","best_window":"21:30\u201305:05","dark_hours":7.4,"date":"2029-08-28","moon_free_dark_hours":0.0,"moon_illumination":79,"moon_separation":29.0,"score":null,"score_astronomy":51,"score_weather":null,"transit_alt":89.7,"transit_local":"03:35","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":0.58,"best_label":"good","best_window":"21:40\u201322:15","dark_hours":7.46,"date":"2029-08-29","moon_free_dark_hours":0.53,"moon_illumination":71,"moon_separation":32.3,"score":null,"score_astronomy":81,"score_weather":null,"transit_alt":89.6,"transit_local":"03:30","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":5.75,"best_label":"good","best_window":"21:40\u201303:25","dark_hours":7.51,"date":"2029-08-30","moon_free_dark_hours":1.13,"moon_illumination":62,"moon_separation":38.8,"score":null,"score_astronomy":85,"score_weather":null,"transit_alt":89.5,"transit_local":"03:30","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":7.58,"best_label":"good","best_window":"21:35\u201305:10","dark_hours":7.57,"date":"2029-08-31","moon_free_dark_hours":1.85,"moon_illumination":52,"moon_separation":47.3,"score":null,"score_astronomy":91,"score_weather":null,"transit_alt":89.6,"transit_local":"03:25","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":"2029-08-02","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}}