{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":4.5,"best_label":"good","best_window":"20:35\u201301:05","dark_hours":9.31,"date":"2027-10-04","moon_free_dark_hours":8.67,"moon_illumination":26,"moon_separation":70.6,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"19:05","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":4.5,"best_label":"good","best_window":"20:30\u201301:00","dark_hours":9.36,"date":"2027-10-05","moon_free_dark_hours":7.83,"moon_illumination":35,"moon_separation":67.1,"score":null,"score_astronomy":97,"score_weather":null,"transit_alt":87.1,"transit_local":"19:00","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":4.5,"best_label":"good","best_window":"20:30\u201301:00","dark_hours":9.4,"date":"2027-10-06","moon_free_dark_hours":6.9,"moon_illumination":44,"moon_separation":64.7,"score":null,"score_astronomy":90,"score_weather":null,"transit_alt":87.1,"transit_local":"19:00","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":4.42,"best_label":"good","best_window":"20:30\u201300:55","dark_hours":9.45,"date":"2027-10-07","moon_free_dark_hours":5.9,"moon_illumination":54,"moon_separation":63.5,"score":null,"score_astronomy":80,"score_weather":null,"transit_alt":87.1,"transit_local":"18:55","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":4.08,"best_label":"good","best_window":"20:25\u201300:30","dark_hours":9.5,"date":"2027-10-08","moon_free_dark_hours":4.88,"moon_illumination":63,"moon_separation":63.6,"score":null,"score_astronomy":66,"score_weather":null,"transit_alt":87.1,"transit_local":"18:50","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":3.67,"best_label":"good","best_window":"20:25\u201300:05","dark_hours":9.54,"date":"2027-10-09","moon_free_dark_hours":3.85,"moon_illumination":72,"moon_separation":64.8,"score":null,"score_astronomy":57,"score_weather":null,"transit_alt":87.1,"transit_local":"18:45","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":2.33,"best_label":"good","best_window":"20:25\u201322:45","dark_hours":9.59,"date":"2027-10-10","moon_free_dark_hours":2.83,"moon_illumination":80,"moon_separation":67.2,"score":null,"score_astronomy":51,"score_weather":null,"transit_alt":87.1,"transit_local":"18:45","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":1.75,"best_label":"good","best_window":"20:20\u201322:05","dark_hours":9.63,"date":"2027-10-11","moon_free_dark_hours":1.83,"moon_illumination":87,"moon_separation":70.6,"score":null,"score_astronomy":47,"score_weather":null,"transit_alt":87.1,"transit_local":"18:40","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":1.5,"best_label":"good","best_window":"20:20\u201321:50","dark_hours":9.68,"date":"2027-10-12","moon_free_dark_hours":0.82,"moon_illumination":93,"moon_separation":74.8,"score":null,"score_astronomy":46,"score_weather":null,"transit_alt":87.1,"transit_local":"18:35","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":1.58,"best_label":"good","best_window":"20:20\u201321:55","dark_hours":9.72,"date":"2027-10-13","moon_free_dark_hours":0.0,"moon_illumination":97,"moon_separation":79.8,"score":null,"score_astronomy":47,"score_weather":null,"transit_alt":87.1,"transit_local":"18:30","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":2.0,"best_label":"good","best_window":"20:15\u201322:15","dark_hours":9.77,"date":"2027-10-14","moon_free_dark_hours":0.0,"moon_illumination":99,"moon_separation":85.2,"score":null,"score_astronomy":51,"score_weather":null,"transit_alt":87.1,"transit_local":"18:25","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":2.5,"best_label":"good","best_window":"20:15\u201322:45","dark_hours":9.81,"date":"2027-10-15","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":90.9,"score":null,"score_astronomy":57,"score_weather":null,"transit_alt":87.1,"transit_local":"18:25","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":3.08,"best_label":"good","best_window":"20:15\u201323:20","dark_hours":9.85,"date":"2027-10-16","moon_free_dark_hours":0.0,"moon_illumination":98,"moon_separation":96.7,"score":null,"score_astronomy":64,"score_weather":null,"transit_alt":87.1,"transit_local":"18:20","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":3.58,"best_label":"good","best_window":"20:10\u201323:45","dark_hours":9.9,"date":"2027-10-17","moon_free_dark_hours":0.0,"moon_illumination":94,"moon_separation":102.3,"score":null,"score_astronomy":72,"score_weather":null,"transit_alt":87.1,"transit_local":"18:15","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":3.67,"best_label":"good","best_window":"20:10\u201323:50","dark_hours":9.94,"date":"2027-10-18","moon_free_dark_hours":0.0,"moon_illumination":88,"moon_separation":107.4,"score":null,"score_astronomy":80,"score_weather":null,"transit_alt":87.1,"transit_local":"18:10","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":3.75,"best_label":"good","best_window":"20:10\u201323:55","dark_hours":9.98,"date":"2027-10-19","moon_free_dark_hours":0.78,"moon_illumination":80,"moon_separation":111.7,"score":null,"score_astronomy":95,"score_weather":null,"transit_alt":87.1,"transit_local":"18:05","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":3.75,"best_label":"good","best_window":"20:10\u201323:55","dark_hours":10.02,"date":"2027-10-20","moon_free_dark_hours":1.83,"moon_illumination":70,"moon_separation":114.9,"score":null,"score_astronomy":98,"score_weather":null,"transit_alt":87.1,"transit_local":"18:05","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":3.83,"best_label":"good","best_window":"20:05\u201323:55","dark_hours":10.07,"date":"2027-10-21","moon_free_dark_hours":3.03,"moon_illumination":59,"moon_separation":116.5,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"18:00","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":3.83,"best_label":"good","best_window":"20:05\u201323:55","dark_hours":10.11,"date":"2027-10-22","moon_free_dark_hours":4.28,"moon_illumination":48,"moon_separation":116.5,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"17:55","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":3.75,"best_label":"good","best_window":"20:05\u201323:50","dark_hours":10.15,"date":"2027-10-23","moon_free_dark_hours":5.57,"moon_illumination":36,"moon_separation":114.8,"score":null,"score_astronomy":99,"score_weather":null,"transit_alt":87.1,"transit_local":"17:50","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":3.75,"best_label":"good","best_window":"20:00\u201323:45","dark_hours":10.19,"date":"2027-10-24","moon_free_dark_hours":6.85,"moon_illumination":26,"moon_separation":111.4,"score":null,"score_astronomy":99,"score_weather":null,"transit_alt":87.1,"transit_local":"17:50","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":3.75,"best_label":"good","best_window":"20:00\u201323:45","dark_hours":10.23,"date":"2027-10-25","moon_free_dark_hours":8.08,"moon_illumination":16,"moon_separation":106.8,"score":null,"score_astronomy":97,"score_weather":null,"transit_alt":87.1,"transit_local":"17:45","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":3.67,"best_label":"good","best_window":"20:00\u201323:40","dark_hours":10.27,"date":"2027-10-26","moon_free_dark_hours":9.33,"moon_illumination":9,"moon_separation":101.3,"score":null,"score_astronomy":95,"score_weather":null,"transit_alt":87.1,"transit_local":"17:40","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":3.58,"best_label":"good","best_window":"20:00\u201323:35","dark_hours":10.31,"date":"2027-10-27","moon_free_dark_hours":10.28,"moon_illumination":4,"moon_separation":95.2,"score":null,"score_astronomy":94,"score_weather":null,"transit_alt":87.1,"transit_local":"17:35","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":3.58,"best_label":"good","best_window":"19:55\u201323:30","dark_hours":10.34,"date":"2027-10-28","moon_free_dark_hours":10.33,"moon_illumination":1,"moon_separation":88.9,"score":null,"score_astronomy":95,"score_weather":null,"transit_alt":87.1,"transit_local":"17:30","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":3.5,"best_label":"good","best_window":"19:55\u201323:25","dark_hours":10.38,"date":"2027-10-29","moon_free_dark_hours":10.37,"moon_illumination":0,"moon_separation":82.8,"score":null,"score_astronomy":93,"score_weather":null,"transit_alt":87.1,"transit_local":"17:30","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":3.5,"best_label":"good","best_window":"19:55\u201323:25","dark_hours":10.42,"date":"2027-10-30","moon_free_dark_hours":10.4,"moon_illumination":2,"moon_separation":77.1,"score":null,"score_astronomy":91,"score_weather":null,"transit_alt":87.1,"transit_local":"17:25","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":3.42,"best_label":"good","best_window":"18:55\u201322:20","dark_hours":10.46,"date":"2027-10-31","moon_free_dark_hours":10.43,"moon_illumination":6,"moon_separation":72.1,"score":null,"score_astronomy":90,"score_weather":null,"transit_alt":87.1,"transit_local":"16:20","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":3.33,"best_label":"good","best_window":"18:55\u201322:15","dark_hours":10.49,"date":"2027-11-01","moon_free_dark_hours":10.47,"moon_illumination":12,"moon_separation":68.1,"score":null,"score_astronomy":88,"score_weather":null,"transit_alt":87.1,"transit_local":"16:15","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":3.33,"best_label":"good","best_window":"18:50\u201322:10","dark_hours":10.53,"date":"2027-11-02","moon_free_dark_hours":9.58,"moon_illumination":20,"moon_separation":65.2,"score":null,"score_astronomy":81,"score_weather":null,"transit_alt":87.1,"transit_local":"16:10","verdict":"unknown","weather_source":"none","weekday":"Tue"}],"note":"score_astronomy for every night; score_weather/score only where a forecast (next 4 days) or ERA5 history exists \u2014 null otherwise","start":"2027-10-04","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}}