{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":5.25,"best_label":"good","best_window":"23:10\u201304:25","dark_hours":6.17,"date":"2045-05-04","moon_free_dark_hours":2.1,"moon_illumination":86,"moon_separation":67.3,"score":null,"score_astronomy":84,"score_weather":null,"transit_alt":87.1,"transit_local":"05:05","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":5.25,"best_label":"good","best_window":"23:10\u201304:25","dark_hours":6.11,"date":"2045-05-05","moon_free_dark_hours":2.85,"moon_illumination":78,"moon_separation":65.5,"score":null,"score_astronomy":90,"score_weather":null,"transit_alt":87.1,"transit_local":"05:00","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":5.25,"best_label":"good","best_window":"23:05\u201304:20","dark_hours":6.05,"date":"2045-05-06","moon_free_dark_hours":3.47,"moon_illumination":70,"moon_separation":64.9,"score":null,"score_astronomy":95,"score_weather":null,"transit_alt":87.1,"transit_local":"05:00","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":5.33,"best_label":"good","best_window":"23:00\u201304:20","dark_hours":6.0,"date":"2045-05-07","moon_free_dark_hours":3.93,"moon_illumination":61,"moon_separation":65.5,"score":null,"score_astronomy":99,"score_weather":null,"transit_alt":87.1,"transit_local":"04:55","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":5.42,"best_label":"good","best_window":"22:55\u201304:20","dark_hours":5.94,"date":"2045-05-08","moon_free_dark_hours":4.33,"moon_illumination":52,"moon_separation":67.1,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"04:50","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":5.42,"best_label":"good","best_window":"22:50\u201304:15","dark_hours":5.88,"date":"2045-05-09","moon_free_dark_hours":4.68,"moon_illumination":42,"moon_separation":69.8,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"04:45","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":5.42,"best_label":"good","best_window":"22:50\u201304:15","dark_hours":5.83,"date":"2045-05-10","moon_free_dark_hours":4.98,"moon_illumination":33,"moon_separation":73.3,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"04:40","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":5.5,"best_label":"good","best_window":"22:45\u201304:15","dark_hours":5.77,"date":"2045-05-11","moon_free_dark_hours":5.27,"moon_illumination":24,"moon_separation":77.6,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"04:40","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":5.5,"best_label":"good","best_window":"22:40\u201304:10","dark_hours":5.72,"date":"2045-05-12","moon_free_dark_hours":5.58,"moon_illumination":16,"moon_separation":82.5,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"04:35","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":5.58,"best_label":"good","best_window":"22:35\u201304:10","dark_hours":5.66,"date":"2045-05-13","moon_free_dark_hours":5.65,"moon_illumination":10,"moon_separation":87.8,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"04:30","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":5.67,"best_label":"good","best_window":"22:30\u201304:10","dark_hours":5.61,"date":"2045-05-14","moon_free_dark_hours":5.6,"moon_illumination":4,"moon_separation":93.4,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"04:25","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":5.5,"best_label":"good","best_window":"22:35\u201304:05","dark_hours":5.56,"date":"2045-05-15","moon_free_dark_hours":5.53,"moon_illumination":1,"moon_separation":99.0,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"04:25","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":5.5,"best_label":"good","best_window":"22:35\u201304:05","dark_hours":5.5,"date":"2045-05-16","moon_free_dark_hours":5.48,"moon_illumination":0,"moon_separation":104.3,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"04:20","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":5.5,"best_label":"good","best_window":"22:35\u201304:05","dark_hours":5.45,"date":"2045-05-17","moon_free_dark_hours":5.43,"moon_illumination":2,"moon_separation":108.9,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"04:15","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":5.33,"best_label":"good","best_window":"22:40\u201304:00","dark_hours":5.4,"date":"2045-05-18","moon_free_dark_hours":5.0,"moon_illumination":6,"moon_separation":112.4,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"04:10","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":5.33,"best_label":"good","best_window":"22:40\u201304:00","dark_hours":5.35,"date":"2045-05-19","moon_free_dark_hours":4.02,"moon_illumination":13,"moon_separation":114.6,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"04:05","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":5.33,"best_label":"good","best_window":"22:40\u201304:00","dark_hours":5.3,"date":"2045-05-20","moon_free_dark_hours":3.22,"moon_illumination":22,"moon_separation":115.2,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"04:05","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":5.25,"best_label":"good","best_window":"22:45\u201304:00","dark_hours":5.25,"date":"2045-05-21","moon_free_dark_hours":2.6,"moon_illumination":32,"moon_separation":114.0,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"04:00","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":5.17,"best_label":"good","best_window":"22:45\u201303:55","dark_hours":5.2,"date":"2045-05-22","moon_free_dark_hours":2.07,"moon_illumination":43,"moon_separation":111.4,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"03:55","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":5.17,"best_label":"good","best_window":"22:45\u201303:55","dark_hours":5.16,"date":"2045-05-23","moon_free_dark_hours":1.63,"moon_illumination":55,"moon_separation":107.5,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"03:50","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":5.17,"best_label":"good","best_window":"22:45\u201303:55","dark_hours":5.11,"date":"2045-05-24","moon_free_dark_hours":1.23,"moon_illumination":66,"moon_separation":102.6,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"03:45","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":5.0,"best_label":"good","best_window":"22:50\u201303:50","dark_hours":5.06,"date":"2045-05-25","moon_free_dark_hours":0.82,"moon_illumination":76,"moon_separation":97.2,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"03:45","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":5.0,"best_label":"good","best_window":"22:50\u201303:50","dark_hours":5.02,"date":"2045-05-26","moon_free_dark_hours":0.42,"moon_illumination":84,"moon_separation":91.5,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"03:40","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":5.0,"best_label":"good","best_window":"22:50\u201303:50","dark_hours":4.98,"date":"2045-05-27","moon_free_dark_hours":0.0,"moon_illumination":91,"moon_separation":85.8,"score":null,"score_astronomy":81,"score_weather":null,"transit_alt":87.1,"transit_local":"03:35","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":4.75,"best_label":"good","best_window":"23:05\u201303:50","dark_hours":4.93,"date":"2045-05-28","moon_free_dark_hours":0.0,"moon_illumination":96,"moon_separation":80.4,"score":null,"score_astronomy":77,"score_weather":null,"transit_alt":87.1,"transit_local":"03:30","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":4.58,"best_label":"good","best_window":"23:15\u201303:50","dark_hours":4.89,"date":"2045-05-29","moon_free_dark_hours":0.0,"moon_illumination":99,"moon_separation":75.5,"score":null,"score_astronomy":71,"score_weather":null,"transit_alt":87.1,"transit_local":"03:30","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":4.75,"best_label":"good","best_window":"23:00\u201303:45","dark_hours":4.86,"date":"2045-05-30","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":71.3,"score":null,"score_astronomy":65,"score_weather":null,"transit_alt":87.1,"transit_local":"03:25","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":4.83,"best_label":"good","best_window":"22:55\u201303:45","dark_hours":4.82,"date":"2045-05-31","moon_free_dark_hours":0.0,"moon_illumination":98,"moon_separation":68.0,"score":null,"score_astronomy":64,"score_weather":null,"transit_alt":87.1,"transit_local":"03:20","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":4.75,"best_label":"good","best_window":"23:00\u201303:45","dark_hours":4.78,"date":"2045-06-01","moon_free_dark_hours":0.07,"moon_illumination":95,"moon_separation":65.8,"score":null,"score_astronomy":67,"score_weather":null,"transit_alt":87.1,"transit_local":"03:15","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":4.75,"best_label":"good","best_window":"23:00\u201303:45","dark_hours":4.75,"date":"2045-06-02","moon_free_dark_hours":0.73,"moon_illumination":90,"moon_separation":64.8,"score":null,"score_astronomy":93,"score_weather":null,"transit_alt":87.1,"transit_local":"03:10","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":"2045-05-04","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}}