{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":4.0,"best_label":"good","best_window":"19:00\u201323:00","dark_hours":11.17,"date":"2032-01-18","moon_free_dark_hours":5.82,"moon_illumination":44,"moon_separation":31.8,"score":null,"score_astronomy":59,"score_weather":null,"transit_alt":89.7,"transit_local":"17:15","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":1.42,"best_label":"good","best_window":"19:00\u201320:25","dark_hours":11.14,"date":"2032-01-19","moon_free_dark_hours":4.73,"moon_illumination":55,"moon_separation":33.0,"score":null,"score_astronomy":45,"score_weather":null,"transit_alt":89.7,"transit_local":"17:10","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":4.67,"best_label":"marginal","best_window":"19:00\u201323:40","dark_hours":11.12,"date":"2032-01-20","moon_free_dark_hours":3.7,"moon_illumination":65,"moon_separation":38.2,"score":null,"score_astronomy":35,"score_weather":null,"transit_alt":89.5,"transit_local":"17:05","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":4.42,"best_label":"marginal","best_window":"19:00\u201323:25","dark_hours":11.09,"date":"2032-01-21","moon_free_dark_hours":2.72,"moon_illumination":74,"moon_separation":45.8,"score":null,"score_astronomy":30,"score_weather":null,"transit_alt":89.6,"transit_local":"17:05","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":4.17,"best_label":"marginal","best_window":"19:05\u201323:15","dark_hours":11.07,"date":"2032-01-22","moon_free_dark_hours":1.82,"moon_illumination":82,"moon_separation":54.8,"score":null,"score_astronomy":29,"score_weather":null,"transit_alt":89.7,"transit_local":"17:00","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":4.08,"best_label":"marginal","best_window":"19:05\u201323:10","dark_hours":11.04,"date":"2032-01-23","moon_free_dark_hours":0.98,"moon_illumination":89,"moon_separation":64.4,"score":null,"score_astronomy":32,"score_weather":null,"transit_alt":89.7,"transit_local":"16:55","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":0.58,"best_label":"good","best_window":"19:05\u201319:40","dark_hours":11.01,"date":"2032-01-24","moon_free_dark_hours":0.25,"moon_illumination":94,"moon_separation":74.3,"score":null,"score_astronomy":37,"score_weather":null,"transit_alt":89.6,"transit_local":"16:50","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":1.5,"best_label":"good","best_window":"19:05\u201320:35","dark_hours":10.99,"date":"2032-01-25","moon_free_dark_hours":0.0,"moon_illumination":98,"moon_separation":84.4,"score":null,"score_astronomy":45,"score_weather":null,"transit_alt":89.5,"transit_local":"16:50","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":2.42,"best_label":"good","best_window":"19:05\u201321:30","dark_hours":10.96,"date":"2032-01-26","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":94.5,"score":null,"score_astronomy":54,"score_weather":null,"transit_alt":89.7,"transit_local":"16:45","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":3.17,"best_label":"good","best_window":"19:10\u201322:20","dark_hours":10.93,"date":"2032-01-27","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":104.5,"score":null,"score_astronomy":64,"score_weather":null,"transit_alt":89.7,"transit_local":"16:40","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":3.25,"best_label":"good","best_window":"19:10\u201322:25","dark_hours":10.9,"date":"2032-01-28","moon_free_dark_hours":0.0,"moon_illumination":98,"moon_separation":114.3,"score":null,"score_astronomy":74,"score_weather":null,"transit_alt":89.7,"transit_local":"16:35","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":3.33,"best_label":"good","best_window":"19:10\u201322:30","dark_hours":10.87,"date":"2032-01-29","moon_free_dark_hours":0.62,"moon_illumination":95,"moon_separation":123.8,"score":null,"score_astronomy":85,"score_weather":null,"transit_alt":89.6,"transit_local":"16:30","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":3.25,"best_label":"good","best_window":"19:10\u201322:25","dark_hours":10.84,"date":"2032-01-30","moon_free_dark_hours":1.55,"moon_illumination":90,"moon_separation":132.6,"score":null,"score_astronomy":86,"score_weather":null,"transit_alt":89.5,"transit_local":"16:30","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":3.17,"best_label":"good","best_window":"19:15\u201322:25","dark_hours":10.8,"date":"2032-01-31","moon_free_dark_hours":2.5,"moon_illumination":83,"moon_separation":140.3,"score":null,"score_astronomy":85,"score_weather":null,"transit_alt":89.7,"transit_local":"16:25","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":3.25,"best_label":"good","best_window":"19:15\u201322:30","dark_hours":10.77,"date":"2032-02-01","moon_free_dark_hours":3.48,"moon_illumination":76,"moon_separation":145.9,"score":null,"score_astronomy":84,"score_weather":null,"transit_alt":89.8,"transit_local":"16:20","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":3.17,"best_label":"good","best_window":"19:15\u201322:25","dark_hours":10.74,"date":"2032-02-02","moon_free_dark_hours":4.47,"moon_illumination":66,"moon_separation":148.2,"score":null,"score_astronomy":82,"score_weather":null,"transit_alt":89.7,"transit_local":"16:15","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":3.08,"best_label":"good","best_window":"19:15\u201322:20","dark_hours":10.71,"date":"2032-02-03","moon_free_dark_hours":5.48,"moon_illumination":57,"moon_separation":146.2,"score":null,"score_astronomy":80,"score_weather":null,"transit_alt":89.5,"transit_local":"16:10","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":3.0,"best_label":"good","best_window":"19:15\u201322:15","dark_hours":10.67,"date":"2032-02-04","moon_free_dark_hours":6.53,"moon_illumination":46,"moon_separation":140.2,"score":null,"score_astronomy":77,"score_weather":null,"transit_alt":89.6,"transit_local":"16:10","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":2.92,"best_label":"good","best_window":"19:20\u201322:15","dark_hours":10.64,"date":"2032-02-05","moon_free_dark_hours":7.57,"moon_illumination":36,"moon_separation":131.5,"score":null,"score_astronomy":74,"score_weather":null,"transit_alt":89.7,"transit_local":"16:05","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":2.83,"best_label":"good","best_window":"19:20\u201322:10","dark_hours":10.6,"date":"2032-02-06","moon_free_dark_hours":8.57,"moon_illumination":25,"moon_separation":121.0,"score":null,"score_astronomy":72,"score_weather":null,"transit_alt":89.7,"transit_local":"16:00","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":2.75,"best_label":"good","best_window":"19:20\u201322:05","dark_hours":10.57,"date":"2032-02-07","moon_free_dark_hours":9.5,"moon_illumination":16,"moon_separation":109.3,"score":null,"score_astronomy":70,"score_weather":null,"transit_alt":89.6,"transit_local":"15:55","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":2.67,"best_label":"good","best_window":"19:20\u201322:00","dark_hours":10.53,"date":"2032-02-08","moon_free_dark_hours":10.33,"moon_illumination":8,"moon_separation":96.9,"score":null,"score_astronomy":68,"score_weather":null,"transit_alt":89.5,"transit_local":"15:55","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":2.5,"best_label":"good","best_window":"19:25\u201321:55","dark_hours":10.49,"date":"2032-02-09","moon_free_dark_hours":10.47,"moon_illumination":3,"moon_separation":84.0,"score":null,"score_astronomy":64,"score_weather":null,"transit_alt":89.6,"transit_local":"15:50","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":2.5,"best_label":"good","best_window":"19:25\u201321:55","dark_hours":10.46,"date":"2032-02-10","moon_free_dark_hours":10.43,"moon_illumination":0,"moon_separation":71.2,"score":null,"score_astronomy":62,"score_weather":null,"transit_alt":89.7,"transit_local":"15:45","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":2.42,"best_label":"good","best_window":"19:25\u201321:50","dark_hours":10.42,"date":"2032-02-11","moon_free_dark_hours":10.4,"moon_illumination":1,"moon_separation":58.8,"score":null,"score_astronomy":60,"score_weather":null,"transit_alt":89.7,"transit_local":"15:40","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":2.33,"best_label":"good","best_window":"19:25\u201321:45","dark_hours":10.38,"date":"2032-02-12","moon_free_dark_hours":10.2,"moon_illumination":4,"moon_separation":47.6,"score":null,"score_astronomy":57,"score_weather":null,"transit_alt":89.6,"transit_local":"15:35","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":2.25,"best_label":"good","best_window":"19:25\u201321:40","dark_hours":10.34,"date":"2032-02-13","moon_free_dark_hours":8.95,"moon_illumination":10,"moon_separation":38.4,"score":null,"score_astronomy":52,"score_weather":null,"transit_alt":89.5,"transit_local":"15:35","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":2.0,"best_label":"good","best_window":"19:30\u201321:30","dark_hours":10.3,"date":"2032-02-14","moon_free_dark_hours":7.75,"moon_illumination":18,"moon_separation":32.9,"score":null,"score_astronomy":43,"score_weather":null,"transit_alt":89.7,"transit_local":"15:30","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":1.75,"best_label":"good","best_window":"19:30\u201321:15","dark_hours":10.26,"date":"2032-02-15","moon_free_dark_hours":6.58,"moon_illumination":28,"moon_separation":32.3,"score":null,"score_astronomy":36,"score_weather":null,"transit_alt":89.8,"transit_local":"15:25","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":1.58,"best_label":"good","best_window":"19:30\u201321:05","dark_hours":10.22,"date":"2032-02-16","moon_free_dark_hours":5.48,"moon_illumination":38,"moon_separation":36.5,"score":null,"score_astronomy":29,"score_weather":null,"transit_alt":89.7,"transit_local":"15:20","verdict":"unknown","weather_source":"none","weekday":"Mon"}],"note":"score_astronomy for every night; score_weather/score only where a forecast (next 4 days) or ERA5 history exists \u2014 null otherwise","start":"2032-01-18","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}}