{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":6.17,"best_label":"good","best_window":"22:00\u201304:10","dark_hours":6.85,"date":"2040-08-18","moon_free_dark_hours":2.55,"moon_illumination":83,"moon_separation":65.1,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":87.1,"transit_local":"22:10","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":6.08,"best_label":"good","best_window":"22:00\u201304:05","dark_hours":6.91,"date":"2040-08-19","moon_free_dark_hours":1.4,"moon_illumination":91,"moon_separation":66.0,"score":null,"score_astronomy":80,"score_weather":null,"transit_alt":87.1,"transit_local":"22:05","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":3.83,"best_label":"good","best_window":"22:00\u201301:50","dark_hours":6.96,"date":"2040-08-20","moon_free_dark_hours":0.13,"moon_illumination":97,"moon_separation":68.7,"score":null,"score_astronomy":67,"score_weather":null,"transit_alt":87.1,"transit_local":"22:00","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":3.42,"best_label":"good","best_window":"21:55\u201301:20","dark_hours":7.02,"date":"2040-08-21","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":72.8,"score":null,"score_astronomy":69,"score_weather":null,"transit_alt":87.1,"transit_local":"21:55","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":3.58,"best_label":"good","best_window":"21:55\u201301:30","dark_hours":7.08,"date":"2040-08-22","moon_free_dark_hours":0.0,"moon_illumination":99,"moon_separation":77.9,"score":null,"score_astronomy":73,"score_weather":null,"transit_alt":87.1,"transit_local":"21:55","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":4.08,"best_label":"good","best_window":"21:50\u201301:55","dark_hours":7.14,"date":"2040-08-23","moon_free_dark_hours":0.0,"moon_illumination":96,"moon_separation":83.7,"score":null,"score_astronomy":78,"score_weather":null,"transit_alt":87.1,"transit_local":"21:50","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":4.75,"best_label":"good","best_window":"21:50\u201302:35","dark_hours":7.19,"date":"2040-08-24","moon_free_dark_hours":0.0,"moon_illumination":91,"moon_separation":89.7,"score":null,"score_astronomy":83,"score_weather":null,"transit_alt":87.1,"transit_local":"21:45","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":5.33,"best_label":"good","best_window":"21:50\u201303:10","dark_hours":7.25,"date":"2040-08-25","moon_free_dark_hours":0.35,"moon_illumination":84,"moon_separation":95.5,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"21:40","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":5.5,"best_label":"good","best_window":"21:45\u201303:15","dark_hours":7.31,"date":"2040-08-26","moon_free_dark_hours":0.8,"moon_illumination":75,"moon_separation":100.8,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"21:35","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":5.5,"best_label":"good","best_window":"21:45\u201303:15","dark_hours":7.36,"date":"2040-08-27","moon_free_dark_hours":1.28,"moon_illumination":65,"moon_separation":105.5,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"21:35","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":5.58,"best_label":"good","best_window":"21:40\u201303:15","dark_hours":7.42,"date":"2040-08-28","moon_free_dark_hours":1.8,"moon_illumination":55,"moon_separation":109.3,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"21:30","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":5.58,"best_label":"good","best_window":"21:40\u201303:15","dark_hours":7.48,"date":"2040-08-29","moon_free_dark_hours":2.4,"moon_illumination":46,"moon_separation":112.2,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"21:25","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":5.58,"best_label":"good","best_window":"21:40\u201303:15","dark_hours":7.53,"date":"2040-08-30","moon_free_dark_hours":3.1,"moon_illumination":36,"moon_separation":114.1,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"21:20","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":5.67,"best_label":"good","best_window":"21:35\u201303:15","dark_hours":7.59,"date":"2040-08-31","moon_free_dark_hours":3.9,"moon_illumination":27,"moon_separation":114.8,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"21:15","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":5.58,"best_label":"good","best_window":"21:35\u201303:10","dark_hours":7.65,"date":"2040-09-01","moon_free_dark_hours":4.82,"moon_illumination":19,"moon_separation":114.4,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"21:15","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":5.67,"best_label":"good","best_window":"21:30\u201303:10","dark_hours":7.7,"date":"2040-09-02","moon_free_dark_hours":5.8,"moon_illumination":12,"moon_separation":112.9,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"21:10","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":5.58,"best_label":"good","best_window":"21:30\u201303:05","dark_hours":7.76,"date":"2040-09-03","moon_free_dark_hours":6.85,"moon_illumination":7,"moon_separation":110.4,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"21:05","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":5.5,"best_label":"good","best_window":"21:30\u201303:00","dark_hours":7.81,"date":"2040-09-04","moon_free_dark_hours":7.8,"moon_illumination":3,"moon_separation":107.0,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"21:00","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":5.5,"best_label":"good","best_window":"21:25\u201302:55","dark_hours":7.87,"date":"2040-09-05","moon_free_dark_hours":7.85,"moon_illumination":1,"moon_separation":102.9,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"21:00","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":5.5,"best_label":"good","best_window":"21:25\u201302:55","dark_hours":7.92,"date":"2040-09-06","moon_free_dark_hours":7.9,"moon_illumination":0,"moon_separation":98.2,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"20:55","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":5.5,"best_label":"good","best_window":"21:20\u201302:50","dark_hours":7.98,"date":"2040-09-07","moon_free_dark_hours":7.97,"moon_illumination":2,"moon_separation":93.1,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"20:50","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":5.42,"best_label":"good","best_window":"21:20\u201302:45","dark_hours":8.03,"date":"2040-09-08","moon_free_dark_hours":8.02,"moon_illumination":5,"moon_separation":87.8,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"20:45","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":5.33,"best_label":"good","best_window":"21:20\u201302:40","dark_hours":8.08,"date":"2040-09-09","moon_free_dark_hours":8.07,"moon_illumination":11,"moon_separation":82.6,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"20:40","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":5.33,"best_label":"good","best_window":"21:15\u201302:35","dark_hours":8.14,"date":"2040-09-10","moon_free_dark_hours":7.85,"moon_illumination":18,"moon_separation":77.5,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"20:40","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":5.33,"best_label":"good","best_window":"21:15\u201302:35","dark_hours":8.19,"date":"2040-09-11","moon_free_dark_hours":7.42,"moon_illumination":27,"moon_separation":73.0,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"20:35","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":5.33,"best_label":"good","best_window":"21:10\u201302:30","dark_hours":8.25,"date":"2040-09-12","moon_free_dark_hours":6.88,"moon_illumination":37,"moon_separation":69.3,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"20:30","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":5.25,"best_label":"good","best_window":"21:10\u201302:25","dark_hours":8.3,"date":"2040-09-13","moon_free_dark_hours":6.2,"moon_illumination":48,"moon_separation":66.7,"score":null,"score_astronomy":99,"score_weather":null,"transit_alt":87.1,"transit_local":"20:25","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":5.17,"best_label":"good","best_window":"21:10\u201302:20","dark_hours":8.35,"date":"2040-09-14","moon_free_dark_hours":5.37,"moon_illumination":60,"moon_separation":65.4,"score":null,"score_astronomy":91,"score_weather":null,"transit_alt":87.1,"transit_local":"20:20","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":5.25,"best_label":"good","best_window":"21:05\u201302:20","dark_hours":8.4,"date":"2040-09-15","moon_free_dark_hours":4.33,"moon_illumination":70,"moon_separation":65.7,"score":null,"score_astronomy":84,"score_weather":null,"transit_alt":87.1,"transit_local":"20:20","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":4.67,"best_label":"good","best_window":"21:05\u201301:45","dark_hours":8.46,"date":"2040-09-16","moon_free_dark_hours":3.12,"moon_illumination":80,"moon_separation":67.7,"score":null,"score_astronomy":69,"score_weather":null,"transit_alt":87.1,"transit_local":"20:15","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":"2040-08-18","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}}
