{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":4.83,"best_label":"good","best_window":"20:50\u201301:40","dark_hours":8.88,"date":"2039-09-25","moon_free_dark_hours":5.5,"moon_illumination":58,"moon_separation":64.0,"score":null,"score_astronomy":87,"score_weather":null,"transit_alt":87.1,"transit_local":"19:40","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":4.83,"best_label":"good","best_window":"20:45\u201301:35","dark_hours":8.93,"date":"2039-09-26","moon_free_dark_hours":4.45,"moon_illumination":69,"moon_separation":65.5,"score":null,"score_astronomy":74,"score_weather":null,"transit_alt":87.1,"transit_local":"19:40","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":4.33,"best_label":"good","best_window":"20:45\u201301:05","dark_hours":8.98,"date":"2039-09-27","moon_free_dark_hours":3.28,"moon_illumination":79,"moon_separation":68.5,"score":null,"score_astronomy":63,"score_weather":null,"transit_alt":87.1,"transit_local":"19:35","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":3.17,"best_label":"good","best_window":"20:45\u201323:55","dark_hours":9.03,"date":"2039-09-28","moon_free_dark_hours":2.12,"moon_illumination":87,"moon_separation":72.7,"score":null,"score_astronomy":59,"score_weather":null,"transit_alt":87.1,"transit_local":"19:30","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":2.75,"best_label":"good","best_window":"20:40\u201323:25","dark_hours":9.08,"date":"2039-09-29","moon_free_dark_hours":0.95,"moon_illumination":94,"moon_separation":77.7,"score":null,"score_astronomy":59,"score_weather":null,"transit_alt":87.1,"transit_local":"19:25","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":2.75,"best_label":"good","best_window":"20:40\u201323:25","dark_hours":9.12,"date":"2039-09-30","moon_free_dark_hours":0.0,"moon_illumination":98,"moon_separation":83.2,"score":null,"score_astronomy":61,"score_weather":null,"transit_alt":87.1,"transit_local":"19:20","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":3.0,"best_label":"good","best_window":"20:40\u201323:40","dark_hours":9.17,"date":"2039-10-01","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":88.9,"score":null,"score_astronomy":65,"score_weather":null,"transit_alt":87.1,"transit_local":"19:20","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":3.5,"best_label":"good","best_window":"20:35\u201300:05","dark_hours":9.22,"date":"2039-10-02","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":94.5,"score":null,"score_astronomy":71,"score_weather":null,"transit_alt":87.1,"transit_local":"19:15","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":4.0,"best_label":"good","best_window":"20:35\u201300:35","dark_hours":9.27,"date":"2039-10-03","moon_free_dark_hours":0.0,"moon_illumination":97,"moon_separation":99.9,"score":null,"score_astronomy":78,"score_weather":null,"transit_alt":87.1,"transit_local":"19:10","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":4.08,"best_label":"good","best_window":"20:35\u201300:40","dark_hours":9.32,"date":"2039-10-04","moon_free_dark_hours":0.0,"moon_illumination":93,"moon_separation":104.8,"score":null,"score_astronomy":85,"score_weather":null,"transit_alt":87.1,"transit_local":"19:05","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":4.17,"best_label":"good","best_window":"20:30\u201300:40","dark_hours":9.36,"date":"2039-10-05","moon_free_dark_hours":0.33,"moon_illumination":87,"moon_separation":108.9,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"19:05","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":4.25,"best_label":"good","best_window":"20:30\u201300:45","dark_hours":9.41,"date":"2039-10-06","moon_free_dark_hours":0.87,"moon_illumination":80,"moon_separation":112.2,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"19:00","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":4.25,"best_label":"good","best_window":"20:30\u201300:45","dark_hours":9.46,"date":"2039-10-07","moon_free_dark_hours":1.47,"moon_illumination":72,"moon_separation":114.6,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"18:55","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":4.25,"best_label":"good","best_window":"20:25\u201300:40","dark_hours":9.5,"date":"2039-10-08","moon_free_dark_hours":2.18,"moon_illumination":64,"moon_separation":115.8,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"18:50","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":4.25,"best_label":"good","best_window":"20:25\u201300:40","dark_hours":9.55,"date":"2039-10-09","moon_free_dark_hours":2.98,"moon_illumination":54,"moon_separation":115.9,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"18:45","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":4.25,"best_label":"good","best_window":"20:25\u201300:40","dark_hours":9.59,"date":"2039-10-10","moon_free_dark_hours":3.92,"moon_illumination":45,"moon_separation":114.8,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"18:45","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":4.33,"best_label":"good","best_window":"20:20\u201300:40","dark_hours":9.64,"date":"2039-10-11","moon_free_dark_hours":4.93,"moon_illumination":35,"moon_separation":112.5,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"18:40","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":4.25,"best_label":"good","best_window":"20:20\u201300:35","dark_hours":9.68,"date":"2039-10-12","moon_free_dark_hours":6.0,"moon_illumination":26,"moon_separation":109.1,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"18:35","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":4.17,"best_label":"good","best_window":"20:20\u201300:30","dark_hours":9.73,"date":"2039-10-13","moon_free_dark_hours":7.13,"moon_illumination":18,"moon_separation":104.7,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"18:30","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":4.17,"best_label":"good","best_window":"20:15\u201300:25","dark_hours":9.77,"date":"2039-10-14","moon_free_dark_hours":8.28,"moon_illumination":10,"moon_separation":99.5,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"18:25","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":4.17,"best_label":"good","best_window":"20:15\u201300:25","dark_hours":9.81,"date":"2039-10-15","moon_free_dark_hours":9.48,"moon_illumination":5,"moon_separation":93.8,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"18:25","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":4.08,"best_label":"good","best_window":"20:15\u201300:20","dark_hours":9.86,"date":"2039-10-16","moon_free_dark_hours":9.83,"moon_illumination":1,"moon_separation":87.7,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"18:20","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":4.08,"best_label":"good","best_window":"20:10\u201300:15","dark_hours":9.9,"date":"2039-10-17","moon_free_dark_hours":9.88,"moon_illumination":0,"moon_separation":81.6,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"18:15","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":4.0,"best_label":"good","best_window":"20:10\u201300:10","dark_hours":9.94,"date":"2039-10-18","moon_free_dark_hours":9.92,"moon_illumination":2,"moon_separation":75.8,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"18:10","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":3.92,"best_label":"good","best_window":"20:10\u201300:05","dark_hours":9.99,"date":"2039-10-19","moon_free_dark_hours":9.97,"moon_illumination":6,"moon_separation":70.8,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"18:05","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":3.92,"best_label":"good","best_window":"20:10\u201300:05","dark_hours":10.03,"date":"2039-10-20","moon_free_dark_hours":9.75,"moon_illumination":13,"moon_separation":66.9,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"18:05","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":3.92,"best_label":"good","best_window":"20:05\u201300:00","dark_hours":10.07,"date":"2039-10-21","moon_free_dark_hours":9.02,"moon_illumination":22,"moon_separation":64.7,"score":null,"score_astronomy":95,"score_weather":null,"transit_alt":87.1,"transit_local":"18:00","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":3.83,"best_label":"good","best_window":"20:05\u201323:55","dark_hours":10.11,"date":"2039-10-22","moon_free_dark_hours":8.12,"moon_illumination":32,"moon_separation":64.1,"score":null,"score_astronomy":83,"score_weather":null,"transit_alt":87.1,"transit_local":"17:55","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":3.75,"best_label":"good","best_window":"20:05\u201323:50","dark_hours":10.15,"date":"2039-10-23","moon_free_dark_hours":7.08,"moon_illumination":44,"moon_separation":65.3,"score":null,"score_astronomy":74,"score_weather":null,"transit_alt":87.1,"transit_local":"17:50","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":3.5,"best_label":"good","best_window":"20:00\u201323:30","dark_hours":10.19,"date":"2039-10-24","moon_free_dark_hours":5.95,"moon_illumination":55,"moon_separation":67.9,"score":null,"score_astronomy":64,"score_weather":null,"transit_alt":87.1,"transit_local":"17:50","verdict":"unknown","weather_source":"none","weekday":"Mon"}],"note":"score_astronomy for every night; score_weather/score only where a forecast (next 4 days) or ERA5 history exists \u2014 null otherwise","start":"2039-09-25","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}}
