{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":0.58,"best_label":"marginal","best_window":"05:35\u201306:10","dark_hours":11.41,"date":"2042-01-04","moon_free_dark_hours":0.0,"moon_illumination":98,"moon_separation":112.8,"score":null,"score_astronomy":9,"score_weather":null,"transit_alt":87.1,"transit_local":"12:00","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":0.67,"best_label":"marginal","best_window":"05:30\u201306:10","dark_hours":11.4,"date":"2042-01-05","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":113.5,"score":null,"score_astronomy":9,"score_weather":null,"transit_alt":87.1,"transit_local":"11:55","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":0.75,"best_label":"marginal","best_window":"05:25\u201306:10","dark_hours":11.39,"date":"2042-01-06","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":113.0,"score":null,"score_astronomy":10,"score_weather":null,"transit_alt":87.1,"transit_local":"11:50","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":1.42,"best_label":"marginal","best_window":"05:20\u201306:45","dark_hours":11.37,"date":"2042-01-07","moon_free_dark_hours":0.0,"moon_illumination":97,"moon_separation":111.4,"score":null,"score_astronomy":10,"score_weather":null,"transit_alt":87.1,"transit_local":"11:45","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":1.5,"best_label":"marginal","best_window":"05:15\u201306:45","dark_hours":11.36,"date":"2042-01-08","moon_free_dark_hours":0.42,"moon_illumination":93,"moon_separation":108.7,"score":null,"score_astronomy":11,"score_weather":null,"transit_alt":87.1,"transit_local":"11:45","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":1.5,"best_label":"marginal","best_window":"05:15\u201306:45","dark_hours":11.34,"date":"2042-01-09","moon_free_dark_hours":1.48,"moon_illumination":88,"moon_separation":105.3,"score":null,"score_astronomy":11,"score_weather":null,"transit_alt":87.1,"transit_local":"11:40","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":0.08,"best_label":"good","best_window":"06:05\u201306:10","dark_hours":11.32,"date":"2042-01-10","moon_free_dark_hours":2.52,"moon_illumination":81,"moon_separation":101.4,"score":null,"score_astronomy":12,"score_weather":null,"transit_alt":87.1,"transit_local":"11:35","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":0.17,"best_label":"good","best_window":"06:00\u201306:10","dark_hours":11.3,"date":"2042-01-11","moon_free_dark_hours":3.52,"moon_illumination":73,"moon_separation":97.0,"score":null,"score_astronomy":13,"score_weather":null,"transit_alt":87.1,"transit_local":"11:30","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":0.25,"best_label":"good","best_window":"05:55\u201306:10","dark_hours":11.28,"date":"2042-01-12","moon_free_dark_hours":4.5,"moon_illumination":64,"moon_separation":92.3,"score":null,"score_astronomy":14,"score_weather":null,"transit_alt":87.1,"transit_local":"11:25","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":0.33,"best_label":"good","best_window":"05:50\u201306:10","dark_hours":11.26,"date":"2042-01-13","moon_free_dark_hours":5.48,"moon_illumination":55,"moon_separation":87.6,"score":null,"score_astronomy":15,"score_weather":null,"transit_alt":87.1,"transit_local":"11:25","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":0.5,"best_label":"good","best_window":"05:40\u201306:10","dark_hours":11.24,"date":"2042-01-14","moon_free_dark_hours":6.5,"moon_illumination":46,"moon_separation":82.9,"score":null,"score_astronomy":17,"score_weather":null,"transit_alt":87.1,"transit_local":"11:20","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":0.58,"best_label":"good","best_window":"05:35\u201306:10","dark_hours":11.22,"date":"2042-01-15","moon_free_dark_hours":7.57,"moon_illumination":36,"moon_separation":78.4,"score":null,"score_astronomy":19,"score_weather":null,"transit_alt":87.1,"transit_local":"11:15","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":0.75,"best_label":"good","best_window":"05:25\u201306:10","dark_hours":11.2,"date":"2042-01-16","moon_free_dark_hours":8.67,"moon_illumination":27,"moon_separation":74.3,"score":null,"score_astronomy":21,"score_weather":null,"transit_alt":87.1,"transit_local":"11:10","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":0.83,"best_label":"good","best_window":"05:20\u201306:10","dark_hours":11.18,"date":"2042-01-17","moon_free_dark_hours":9.82,"moon_illumination":18,"moon_separation":70.8,"score":null,"score_astronomy":24,"score_weather":null,"transit_alt":87.1,"transit_local":"11:10","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":1.0,"best_label":"good","best_window":"05:10\u201306:10","dark_hours":11.15,"date":"2042-01-18","moon_free_dark_hours":10.95,"moon_illumination":11,"moon_separation":68.2,"score":null,"score_astronomy":26,"score_weather":null,"transit_alt":87.1,"transit_local":"11:05","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":1.08,"best_label":"good","best_window":"05:05\u201306:10","dark_hours":11.13,"date":"2042-01-19","moon_free_dark_hours":11.12,"moon_illumination":5,"moon_separation":66.7,"score":null,"score_astronomy":29,"score_weather":null,"transit_alt":87.1,"transit_local":"11:00","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":1.17,"best_label":"good","best_window":"05:00\u201306:10","dark_hours":11.1,"date":"2042-01-20","moon_free_dark_hours":11.1,"moon_illumination":1,"moon_separation":66.6,"score":null,"score_astronomy":30,"score_weather":null,"transit_alt":87.1,"transit_local":"10:55","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":1.08,"best_label":"good","best_window":"05:00\u201306:05","dark_hours":11.08,"date":"2042-01-21","moon_free_dark_hours":11.07,"moon_illumination":0,"moon_separation":68.1,"score":null,"score_astronomy":31,"score_weather":null,"transit_alt":87.1,"transit_local":"10:50","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":1.17,"best_label":"good","best_window":"04:55\u201306:05","dark_hours":11.05,"date":"2042-01-22","moon_free_dark_hours":11.05,"moon_illumination":2,"moon_separation":71.1,"score":null,"score_astronomy":32,"score_weather":null,"transit_alt":87.1,"transit_local":"10:50","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":1.25,"best_label":"good","best_window":"04:50\u201306:05","dark_hours":11.03,"date":"2042-01-23","moon_free_dark_hours":10.78,"moon_illumination":6,"moon_separation":75.2,"score":null,"score_astronomy":33,"score_weather":null,"transit_alt":87.1,"transit_local":"10:45","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":1.33,"best_label":"good","best_window":"04:45\u201306:05","dark_hours":11.0,"date":"2042-01-24","moon_free_dark_hours":9.43,"moon_illumination":13,"moon_separation":80.3,"score":null,"score_astronomy":34,"score_weather":null,"transit_alt":87.1,"transit_local":"10:40","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":1.42,"best_label":"good","best_window":"04:40\u201306:05","dark_hours":10.97,"date":"2042-01-25","moon_free_dark_hours":8.17,"moon_illumination":22,"moon_separation":85.9,"score":null,"score_astronomy":36,"score_weather":null,"transit_alt":87.1,"transit_local":"10:35","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":1.42,"best_label":"good","best_window":"04:40\u201306:05","dark_hours":10.94,"date":"2042-01-26","moon_free_dark_hours":6.9,"moon_illumination":32,"moon_separation":91.6,"score":null,"score_astronomy":37,"score_weather":null,"transit_alt":87.1,"transit_local":"10:30","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":1.5,"best_label":"good","best_window":"04:35\u201306:05","dark_hours":10.91,"date":"2042-01-27","moon_free_dark_hours":5.65,"moon_illumination":43,"moon_separation":97.2,"score":null,"score_astronomy":38,"score_weather":null,"transit_alt":87.1,"transit_local":"10:30","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":1.58,"best_label":"good","best_window":"04:30\u201306:05","dark_hours":10.88,"date":"2042-01-28","moon_free_dark_hours":4.42,"moon_illumination":55,"moon_separation":102.2,"score":null,"score_astronomy":39,"score_weather":null,"transit_alt":87.1,"transit_local":"10:25","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":1.58,"best_label":"good","best_window":"04:25\u201306:00","dark_hours":10.85,"date":"2042-01-29","moon_free_dark_hours":3.18,"moon_illumination":65,"moon_separation":106.5,"score":null,"score_astronomy":40,"score_weather":null,"transit_alt":87.1,"transit_local":"10:20","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":1.67,"best_label":"good","best_window":"04:20\u201306:00","dark_hours":10.82,"date":"2042-01-30","moon_free_dark_hours":1.98,"moon_illumination":75,"moon_separation":109.9,"score":null,"score_astronomy":41,"score_weather":null,"transit_alt":87.1,"transit_local":"10:15","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":1.5,"best_label":"good","best_window":"04:30\u201306:00","dark_hours":10.79,"date":"2042-01-31","moon_free_dark_hours":0.88,"moon_illumination":83,"moon_separation":112.2,"score":null,"score_astronomy":41,"score_weather":null,"transit_alt":87.1,"transit_local":"10:15","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":1.58,"best_label":"good","best_window":"04:25\u201306:00","dark_hours":10.75,"date":"2042-02-01","moon_free_dark_hours":0.0,"moon_illumination":90,"moon_separation":113.4,"score":null,"score_astronomy":36,"score_weather":null,"transit_alt":87.1,"transit_local":"10:10","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":1.58,"best_label":"good","best_window":"04:25\u201306:00","dark_hours":10.72,"date":"2042-02-02","moon_free_dark_hours":0.0,"moon_illumination":95,"moon_separation":113.3,"score":null,"score_astronomy":35,"score_weather":null,"transit_alt":87.1,"transit_local":"10:05","verdict":"unknown","weather_source":"none","weekday":"Sun"}],"note":"score_astronomy for every night; score_weather/score only where a forecast (next 4 days) or ERA5 history exists \u2014 null otherwise","start":"2042-01-04","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}}