{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":5.5,"best_label":"good","best_window":"22:40\u201304:10","dark_hours":5.72,"date":"2029-05-12","moon_free_dark_hours":5.7,"moon_illumination":0,"moon_separation":100.1,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"04:35","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":5.58,"best_label":"good","best_window":"22:35\u201304:10","dark_hours":5.67,"date":"2029-05-13","moon_free_dark_hours":5.65,"moon_illumination":0,"moon_separation":105.6,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"04:30","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":5.67,"best_label":"good","best_window":"22:30\u201304:10","dark_hours":5.62,"date":"2029-05-14","moon_free_dark_hours":5.6,"moon_illumination":2,"moon_separation":110.5,"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":5.56,"date":"2029-05-15","moon_free_dark_hours":5.52,"moon_illumination":5,"moon_separation":114.6,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"04:25","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":5.5,"best_label":"good","best_window":"22:35\u201304:05","dark_hours":5.51,"date":"2029-05-16","moon_free_dark_hours":4.67,"moon_illumination":11,"moon_separation":117.7,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"04:20","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":5.5,"best_label":"good","best_window":"22:35\u201304:05","dark_hours":5.46,"date":"2029-05-17","moon_free_dark_hours":3.95,"moon_illumination":18,"moon_separation":119.3,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"04:15","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":5.33,"best_label":"good","best_window":"22:40\u201304:00","dark_hours":5.41,"date":"2029-05-18","moon_free_dark_hours":3.3,"moon_illumination":26,"moon_separation":119.4,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"04:10","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":5.33,"best_label":"good","best_window":"22:40\u201304:00","dark_hours":5.36,"date":"2029-05-19","moon_free_dark_hours":2.73,"moon_illumination":36,"moon_separation":117.8,"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":5.33,"best_label":"good","best_window":"22:40\u201304:00","dark_hours":5.31,"date":"2029-05-20","moon_free_dark_hours":2.22,"moon_illumination":47,"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":"Sun"},{"best_hours":5.33,"best_label":"good","best_window":"22:40\u201304:00","dark_hours":5.26,"date":"2029-05-21","moon_free_dark_hours":1.73,"moon_illumination":58,"moon_separation":109.9,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"04:00","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":5.17,"best_label":"good","best_window":"22:45\u201303:55","dark_hours":5.21,"date":"2029-05-22","moon_free_dark_hours":1.25,"moon_illumination":70,"moon_separation":104.0,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"03:55","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":5.17,"best_label":"good","best_window":"22:45\u201303:55","dark_hours":5.16,"date":"2029-05-23","moon_free_dark_hours":0.75,"moon_illumination":80,"moon_separation":97.2,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"03:50","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":5.17,"best_label":"good","best_window":"22:45\u201303:55","dark_hours":5.11,"date":"2029-05-24","moon_free_dark_hours":0.2,"moon_illumination":88,"moon_separation":90.0,"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":4.75,"best_label":"good","best_window":"23:10\u201303:55","dark_hours":5.07,"date":"2029-05-25","moon_free_dark_hours":0.0,"moon_illumination":95,"moon_separation":82.7,"score":null,"score_astronomy":78,"score_weather":null,"transit_alt":87.1,"transit_local":"03:45","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":4.17,"best_label":"good","best_window":"23:40\u201303:50","dark_hours":5.03,"date":"2029-05-26","moon_free_dark_hours":0.0,"moon_illumination":99,"moon_separation":75.8,"score":null,"score_astronomy":71,"score_weather":null,"transit_alt":87.1,"transit_local":"03:40","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":3.92,"best_label":"good","best_window":"23:55\u201303:50","dark_hours":4.98,"date":"2029-05-27","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":69.7,"score":null,"score_astronomy":63,"score_weather":null,"transit_alt":87.1,"transit_local":"03:35","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":4.5,"best_label":"good","best_window":"23:20\u201303:50","dark_hours":4.94,"date":"2029-05-28","moon_free_dark_hours":0.0,"moon_illumination":98,"moon_separation":64.9,"score":null,"score_astronomy":59,"score_weather":null,"transit_alt":87.1,"transit_local":"03:30","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":4.92,"best_label":"good","best_window":"22:55\u201303:50","dark_hours":4.9,"date":"2029-05-29","moon_free_dark_hours":0.02,"moon_illumination":94,"moon_separation":61.8,"score":null,"score_astronomy":63,"score_weather":null,"transit_alt":87.1,"transit_local":"03:30","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":4.83,"best_label":"good","best_window":"22:55\u201303:45","dark_hours":4.86,"date":"2029-05-30","moon_free_dark_hours":0.73,"moon_illumination":88,"moon_separation":60.4,"score":null,"score_astronomy":91,"score_weather":null,"transit_alt":87.1,"transit_local":"03:25","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":4.83,"best_label":"good","best_window":"22:55\u201303:45","dark_hours":4.82,"date":"2029-05-31","moon_free_dark_hours":1.3,"moon_illumination":80,"moon_separation":60.9,"score":null,"score_astronomy":96,"score_weather":null,"transit_alt":87.1,"transit_local":"03:20","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":4.75,"best_label":"good","best_window":"23:00\u201303:45","dark_hours":4.79,"date":"2029-06-01","moon_free_dark_hours":1.78,"moon_illumination":70,"moon_separation":62.9,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"03:15","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":4.75,"best_label":"good","best_window":"23:00\u201303:45","dark_hours":4.75,"date":"2029-06-02","moon_free_dark_hours":2.18,"moon_illumination":61,"moon_separation":66.3,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"03:10","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":4.75,"best_label":"good","best_window":"23:00\u201303:45","dark_hours":4.72,"date":"2029-06-03","moon_free_dark_hours":2.57,"moon_illumination":51,"moon_separation":70.6,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"03:10","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":4.75,"best_label":"good","best_window":"23:00\u201303:45","dark_hours":4.68,"date":"2029-06-04","moon_free_dark_hours":2.92,"moon_illumination":42,"moon_separation":75.6,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"03:05","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":4.58,"best_label":"good","best_window":"23:05\u201303:40","dark_hours":4.65,"date":"2029-06-05","moon_free_dark_hours":3.27,"moon_illumination":32,"moon_separation":81.1,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"03:00","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":4.58,"best_label":"good","best_window":"23:05\u201303:40","dark_hours":4.63,"date":"2029-06-06","moon_free_dark_hours":3.65,"moon_illumination":24,"moon_separation":86.8,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"02:55","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":4.58,"best_label":"good","best_window":"23:05\u201303:40","dark_hours":4.6,"date":"2029-06-07","moon_free_dark_hours":4.08,"moon_illumination":16,"moon_separation":92.6,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"02:50","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":4.58,"best_label":"good","best_window":"23:05\u201303:40","dark_hours":4.57,"date":"2029-06-08","moon_free_dark_hours":4.55,"moon_illumination":10,"moon_separation":98.4,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"02:50","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":4.58,"best_label":"good","best_window":"23:05\u201303:40","dark_hours":4.55,"date":"2029-06-09","moon_free_dark_hours":4.53,"moon_illumination":5,"moon_separation":104.0,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"02:45","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":4.58,"best_label":"good","best_window":"23:05\u201303:40","dark_hours":4.53,"date":"2029-06-10","moon_free_dark_hours":4.52,"moon_illumination":2,"moon_separation":109.2,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"02:40","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":"2029-05-12","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}}