{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":8.3,"date":"2047-03-28","moon_free_dark_hours":7.72,"moon_illumination":6,"moon_separation":29.2,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":89.6,"transit_local":"12:45","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":8.25,"date":"2047-03-29","moon_free_dark_hours":6.67,"moon_illumination":10,"moon_separation":33.7,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":89.8,"transit_local":"12:40","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":8.2,"date":"2047-03-30","moon_free_dark_hours":5.65,"moon_illumination":17,"moon_separation":41.0,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":89.8,"transit_local":"12:35","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":8.14,"date":"2047-03-31","moon_free_dark_hours":4.67,"moon_illumination":25,"moon_separation":49.8,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":89.7,"transit_local":"13:30","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":8.09,"date":"2047-04-01","moon_free_dark_hours":3.73,"moon_illumination":33,"moon_separation":59.7,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":89.5,"transit_local":"13:30","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":8.03,"date":"2047-04-02","moon_free_dark_hours":2.9,"moon_illumination":43,"moon_separation":70.2,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":89.7,"transit_local":"13:25","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":7.98,"date":"2047-04-03","moon_free_dark_hours":2.17,"moon_illumination":53,"moon_separation":81.3,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":89.8,"transit_local":"13:20","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":7.92,"date":"2047-04-04","moon_free_dark_hours":1.53,"moon_illumination":63,"moon_separation":92.8,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":89.8,"transit_local":"13:15","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":7.87,"date":"2047-04-05","moon_free_dark_hours":0.97,"moon_illumination":74,"moon_separation":104.6,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":89.6,"transit_local":"13:10","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":7.81,"date":"2047-04-06","moon_free_dark_hours":0.47,"moon_illumination":83,"moon_separation":116.7,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":89.6,"transit_local":"13:10","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":7.75,"date":"2047-04-07","moon_free_dark_hours":0.0,"moon_illumination":91,"moon_separation":128.6,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":89.7,"transit_local":"13:05","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":7.7,"date":"2047-04-08","moon_free_dark_hours":0.0,"moon_illumination":96,"moon_separation":139.7,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":89.8,"transit_local":"13:00","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":7.64,"date":"2047-04-09","moon_free_dark_hours":0.0,"moon_illumination":99,"moon_separation":148.3,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":89.7,"transit_local":"12:55","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":7.58,"date":"2047-04-10","moon_free_dark_hours":0.0,"moon_illumination":99,"moon_separation":151.6,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":89.6,"transit_local":"12:50","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":7.53,"date":"2047-04-11","moon_free_dark_hours":0.23,"moon_illumination":96,"moon_separation":147.8,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":89.6,"transit_local":"12:50","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":7.47,"date":"2047-04-12","moon_free_dark_hours":1.52,"moon_illumination":91,"moon_separation":139.1,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":89.8,"transit_local":"12:45","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":7.41,"date":"2047-04-13","moon_free_dark_hours":2.72,"moon_illumination":83,"moon_separation":128.1,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":89.8,"transit_local":"12:40","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":7.36,"date":"2047-04-14","moon_free_dark_hours":3.7,"moon_illumination":73,"moon_separation":116.4,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":89.7,"transit_local":"12:35","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":7.3,"date":"2047-04-15","moon_free_dark_hours":4.52,"moon_illumination":63,"moon_separation":104.5,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":89.5,"transit_local":"12:30","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":7.24,"date":"2047-04-16","moon_free_dark_hours":5.15,"moon_illumination":52,"moon_separation":92.8,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":89.7,"transit_local":"12:30","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":7.18,"date":"2047-04-17","moon_free_dark_hours":5.67,"moon_illumination":42,"moon_separation":81.4,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":89.8,"transit_local":"12:25","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":7.12,"date":"2047-04-18","moon_free_dark_hours":6.08,"moon_illumination":32,"moon_separation":70.5,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":89.8,"transit_local":"12:20","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":7.07,"date":"2047-04-19","moon_free_dark_hours":6.47,"moon_illumination":23,"moon_separation":60.0,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":89.6,"transit_local":"12:15","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":7.01,"date":"2047-04-20","moon_free_dark_hours":6.8,"moon_illumination":16,"moon_separation":50.1,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":89.6,"transit_local":"12:15","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":6.95,"date":"2047-04-21","moon_free_dark_hours":6.93,"moon_illumination":10,"moon_separation":41.2,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":89.7,"transit_local":"12:10","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":6.89,"date":"2047-04-22","moon_free_dark_hours":6.88,"moon_illumination":5,"moon_separation":33.9,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":89.8,"transit_local":"12:05","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":6.83,"date":"2047-04-23","moon_free_dark_hours":6.82,"moon_illumination":2,"moon_separation":29.3,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":89.7,"transit_local":"12:00","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":6.78,"date":"2047-04-24","moon_free_dark_hours":6.77,"moon_illumination":0,"moon_separation":28.7,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":89.6,"transit_local":"11:55","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":6.72,"date":"2047-04-25","moon_free_dark_hours":6.7,"moon_illumination":1,"moon_separation":32.3,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":89.8,"transit_local":"11:50","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":6.66,"date":"2047-04-26","moon_free_dark_hours":6.65,"moon_illumination":3,"moon_separation":39.1,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":89.8,"transit_local":"11:45","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":"2047-03-28","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}}