{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":1.42,"best_label":"good","best_window":"04:35\u201306:00","dark_hours":10.78,"date":"2029-01-31","moon_free_dark_hours":0.27,"moon_illumination":96,"moon_separation":111.5,"score":null,"score_astronomy":31,"score_weather":null,"transit_alt":87.1,"transit_local":"10:10","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":1.42,"best_label":"good","best_window":"04:35\u201306:00","dark_hours":10.75,"date":"2029-02-01","moon_free_dark_hours":1.5,"moon_illumination":90,"moon_separation":105.9,"score":null,"score_astronomy":30,"score_weather":null,"transit_alt":87.1,"transit_local":"10:10","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":1.42,"best_label":"good","best_window":"04:35\u201306:00","dark_hours":10.71,"date":"2029-02-02","moon_free_dark_hours":2.73,"moon_illumination":82,"moon_separation":99.5,"score":null,"score_astronomy":29,"score_weather":null,"transit_alt":87.1,"transit_local":"10:05","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":1.5,"best_label":"good","best_window":"04:30\u201306:00","dark_hours":10.68,"date":"2029-02-03","moon_free_dark_hours":3.98,"moon_illumination":72,"moon_separation":92.6,"score":null,"score_astronomy":31,"score_weather":null,"transit_alt":87.1,"transit_local":"10:00","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":1.58,"best_label":"good","best_window":"04:20\u201305:55","dark_hours":10.65,"date":"2029-02-04","moon_free_dark_hours":5.22,"moon_illumination":61,"moon_separation":85.8,"score":null,"score_astronomy":32,"score_weather":null,"transit_alt":87.1,"transit_local":"09:55","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":1.67,"best_label":"good","best_window":"04:15\u201305:55","dark_hours":10.61,"date":"2029-02-05","moon_free_dark_hours":6.42,"moon_illumination":50,"moon_separation":79.2,"score":null,"score_astronomy":35,"score_weather":null,"transit_alt":87.1,"transit_local":"09:50","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":1.83,"best_label":"good","best_window":"04:05\u201305:55","dark_hours":10.58,"date":"2029-02-06","moon_free_dark_hours":7.57,"moon_illumination":39,"moon_separation":73.3,"score":null,"score_astronomy":39,"score_weather":null,"transit_alt":87.1,"transit_local":"09:50","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":2.08,"best_label":"good","best_window":"03:50\u201305:55","dark_hours":10.54,"date":"2029-02-07","moon_free_dark_hours":8.58,"moon_illumination":28,"moon_separation":68.3,"score":null,"score_astronomy":43,"score_weather":null,"transit_alt":87.1,"transit_local":"09:45","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":2.17,"best_label":"good","best_window":"03:45\u201305:55","dark_hours":10.5,"date":"2029-02-08","moon_free_dark_hours":9.47,"moon_illumination":19,"moon_separation":64.5,"score":null,"score_astronomy":48,"score_weather":null,"transit_alt":87.1,"transit_local":"09:40","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":2.17,"best_label":"good","best_window":"03:40\u201305:50","dark_hours":10.47,"date":"2029-02-09","moon_free_dark_hours":10.2,"moon_illumination":12,"moon_separation":62.0,"score":null,"score_astronomy":52,"score_weather":null,"transit_alt":87.1,"transit_local":"09:35","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":2.17,"best_label":"good","best_window":"03:40\u201305:50","dark_hours":10.43,"date":"2029-02-10","moon_free_dark_hours":10.4,"moon_illumination":6,"moon_separation":61.1,"score":null,"score_astronomy":55,"score_weather":null,"transit_alt":87.1,"transit_local":"09:30","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":2.25,"best_label":"good","best_window":"03:35\u201305:50","dark_hours":10.39,"date":"2029-02-11","moon_free_dark_hours":10.37,"moon_illumination":2,"moon_separation":61.8,"score":null,"score_astronomy":57,"score_weather":null,"transit_alt":87.1,"transit_local":"09:30","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":2.33,"best_label":"good","best_window":"03:30\u201305:50","dark_hours":10.35,"date":"2029-02-12","moon_free_dark_hours":10.33,"moon_illumination":0,"moon_separation":63.9,"score":null,"score_astronomy":58,"score_weather":null,"transit_alt":87.1,"transit_local":"09:25","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":2.33,"best_label":"good","best_window":"03:25\u201305:45","dark_hours":10.31,"date":"2029-02-13","moon_free_dark_hours":10.3,"moon_illumination":0,"moon_separation":67.2,"score":null,"score_astronomy":58,"score_weather":null,"transit_alt":87.1,"transit_local":"09:20","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":2.42,"best_label":"good","best_window":"03:20\u201305:45","dark_hours":10.27,"date":"2029-02-14","moon_free_dark_hours":10.27,"moon_illumination":2,"moon_separation":71.4,"score":null,"score_astronomy":60,"score_weather":null,"transit_alt":87.1,"transit_local":"09:15","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":2.42,"best_label":"good","best_window":"03:20\u201305:45","dark_hours":10.23,"date":"2029-02-15","moon_free_dark_hours":9.62,"moon_illumination":6,"moon_separation":76.3,"score":null,"score_astronomy":61,"score_weather":null,"transit_alt":87.1,"transit_local":"09:15","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":2.5,"best_label":"good","best_window":"03:15\u201305:45","dark_hours":10.19,"date":"2029-02-16","moon_free_dark_hours":8.6,"moon_illumination":11,"moon_separation":81.6,"score":null,"score_astronomy":63,"score_weather":null,"transit_alt":87.1,"transit_local":"09:10","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":2.5,"best_label":"good","best_window":"03:10\u201305:40","dark_hours":10.15,"date":"2029-02-17","moon_free_dark_hours":7.6,"moon_illumination":18,"moon_separation":87.3,"score":null,"score_astronomy":63,"score_weather":null,"transit_alt":87.1,"transit_local":"09:05","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":2.58,"best_label":"good","best_window":"03:05\u201305:40","dark_hours":10.11,"date":"2029-02-18","moon_free_dark_hours":6.58,"moon_illumination":25,"moon_separation":93.0,"score":null,"score_astronomy":65,"score_weather":null,"transit_alt":87.1,"transit_local":"09:00","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":2.58,"best_label":"good","best_window":"03:05\u201305:40","dark_hours":10.07,"date":"2029-02-19","moon_free_dark_hours":5.53,"moon_illumination":34,"moon_separation":98.6,"score":null,"score_astronomy":66,"score_weather":null,"transit_alt":87.1,"transit_local":"08:55","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":2.67,"best_label":"good","best_window":"03:00\u201305:40","dark_hours":10.03,"date":"2029-02-20","moon_free_dark_hours":4.5,"moon_illumination":43,"moon_separation":104.0,"score":null,"score_astronomy":68,"score_weather":null,"transit_alt":87.1,"transit_local":"08:55","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":2.67,"best_label":"good","best_window":"02:55\u201305:35","dark_hours":9.99,"date":"2029-02-21","moon_free_dark_hours":3.48,"moon_illumination":53,"moon_separation":109.0,"score":null,"score_astronomy":68,"score_weather":null,"transit_alt":87.1,"transit_local":"08:50","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":2.67,"best_label":"good","best_window":"02:55\u201305:35","dark_hours":9.94,"date":"2029-02-22","moon_free_dark_hours":2.53,"moon_illumination":63,"moon_separation":113.3,"score":null,"score_astronomy":68,"score_weather":null,"transit_alt":87.1,"transit_local":"08:45","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":2.67,"best_label":"good","best_window":"02:55\u201305:35","dark_hours":9.9,"date":"2029-02-23","moon_free_dark_hours":1.67,"moon_illumination":73,"moon_separation":116.6,"score":null,"score_astronomy":69,"score_weather":null,"transit_alt":87.1,"transit_local":"08:40","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":2.67,"best_label":"good","best_window":"02:50\u201305:30","dark_hours":9.86,"date":"2029-02-24","moon_free_dark_hours":0.9,"moon_illumination":82,"moon_separation":118.6,"score":null,"score_astronomy":68,"score_weather":null,"transit_alt":87.1,"transit_local":"08:35","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":2.67,"best_label":"good","best_window":"02:50\u201305:30","dark_hours":9.81,"date":"2029-02-25","moon_free_dark_hours":0.23,"moon_illumination":89,"moon_separation":118.8,"score":null,"score_astronomy":68,"score_weather":null,"transit_alt":87.1,"transit_local":"08:35","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":2.67,"best_label":"good","best_window":"02:50\u201305:30","dark_hours":9.77,"date":"2029-02-26","moon_free_dark_hours":0.0,"moon_illumination":95,"moon_separation":117.1,"score":null,"score_astronomy":60,"score_weather":null,"transit_alt":87.1,"transit_local":"08:30","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":2.67,"best_label":"good","best_window":"02:50\u201305:30","dark_hours":9.72,"date":"2029-02-27","moon_free_dark_hours":0.0,"moon_illumination":99,"moon_separation":113.6,"score":null,"score_astronomy":57,"score_weather":null,"transit_alt":87.1,"transit_local":"08:25","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":2.58,"best_label":"good","best_window":"02:50\u201305:25","dark_hours":9.68,"date":"2029-02-28","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":108.4,"score":null,"score_astronomy":53,"score_weather":null,"transit_alt":87.1,"transit_local":"08:20","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":2.58,"best_label":"good","best_window":"02:50\u201305:25","dark_hours":9.63,"date":"2029-03-01","moon_free_dark_hours":0.0,"moon_illumination":98,"moon_separation":102.0,"score":null,"score_astronomy":50,"score_weather":null,"transit_alt":87.1,"transit_local":"08:20","verdict":"unknown","weather_source":"none","weekday":"Thu"}],"note":"score_astronomy for every night; score_weather/score only where a forecast (next 4 days) or ERA5 history exists \u2014 null otherwise","start":"2029-01-31","target":{"common_name":"Vega","dec":38.78368896,"name":"* alf Lyr","ra":279.23473479,"simbad_url":"https://simbad.cds.unistra.fr/simbad/sim-id?Ident=Vega","source":"sesame","spectral_type":"A0V","type":"dS*","type_text":"delta Scuti variable","vmag":0.03}}