{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":10.0,"date":"2025-10-19","moon_free_dark_hours":9.98,"moon_illumination":2,"moon_separation":94.6,"score":0,"score_astronomy":100,"score_weather":0,"transit_alt":87.1,"transit_local":"18:05","verdict":"unusable","weather_source":"history","weekday":"Sun"},{"best_hours":0.92,"best_label":"good","best_window":"20:05\u201321:00","dark_hours":10.04,"date":"2025-10-20","moon_free_dark_hours":10.03,"moon_illumination":0,"moon_separation":89.7,"score":44,"score_astronomy":100,"score_weather":44,"transit_alt":87.1,"transit_local":"18:00","verdict":"marginal","weather_source":"history","weekday":"Mon"},{"best_hours":1.0,"best_label":"marginal","best_window":"23:00\u201300:00","dark_hours":10.08,"date":"2025-10-21","moon_free_dark_hours":10.07,"moon_illumination":0,"moon_separation":84.9,"score":23,"score_astronomy":100,"score_weather":23,"transit_alt":87.1,"transit_local":"18:00","verdict":"poor","weather_source":"history","weekday":"Tue"},{"best_hours":1.92,"best_label":"good","best_window":"20:05\u201322:00","dark_hours":10.13,"date":"2025-10-22","moon_free_dark_hours":10.12,"moon_illumination":2,"moon_separation":80.3,"score":67,"score_astronomy":100,"score_weather":67,"transit_alt":87.1,"transit_local":"17:55","verdict":"marginal","weather_source":"history","weekday":"Wed"},{"best_hours":0.92,"best_label":"good","best_window":"20:05\u201321:00","dark_hours":10.17,"date":"2025-10-23","moon_free_dark_hours":10.15,"moon_illumination":5,"moon_separation":76.1,"score":43,"score_astronomy":98,"score_weather":44,"transit_alt":87.1,"transit_local":"17:50","verdict":"marginal","weather_source":"history","weekday":"Thu"},{"best_hours":1.0,"best_label":"good","best_window":"20:00\u201321:00","dark_hours":10.21,"date":"2025-10-24","moon_free_dark_hours":10.18,"moon_illumination":10,"moon_separation":72.5,"score":57,"score_astronomy":97,"score_weather":59,"transit_alt":87.1,"transit_local":"17:45","verdict":"marginal","weather_source":"history","weekday":"Fri"},{"best_hours":2.0,"best_label":"good","best_window":"20:00\u201322:00","dark_hours":10.25,"date":"2025-10-25","moon_free_dark_hours":10.03,"moon_illumination":17,"moon_separation":69.5,"score":61,"score_astronomy":96,"score_weather":64,"transit_alt":87.1,"transit_local":"17:40","verdict":"marginal","weather_source":"history","weekday":"Sat"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":10.29,"date":"2025-10-26","moon_free_dark_hours":9.22,"moon_illumination":24,"moon_separation":67.4,"score":0,"score_astronomy":87,"score_weather":0,"transit_alt":87.1,"transit_local":"16:40","verdict":"unusable","weather_source":"history","weekday":"Sun"},{"best_hours":3.58,"best_label":"good","best_window":"19:00\u201322:35","dark_hours":10.32,"date":"2025-10-27","moon_free_dark_hours":8.27,"moon_illumination":33,"moon_separation":66.3,"score":72,"score_astronomy":78,"score_weather":92,"transit_alt":87.1,"transit_local":"16:35","verdict":"good","weather_source":"history","weekday":"Mon"},{"best_hours":3.58,"best_label":"good","best_window":"18:55\u201322:30","dark_hours":10.36,"date":"2025-10-28","moon_free_dark_hours":7.22,"moon_illumination":42,"moon_separation":66.3,"score":68,"score_astronomy":69,"score_weather":98,"transit_alt":87.1,"transit_local":"16:30","verdict":"marginal","weather_source":"history","weekday":"Tue"},{"best_hours":3.17,"best_label":"good","best_window":"18:55\u201322:05","dark_hours":10.4,"date":"2025-10-29","moon_free_dark_hours":6.1,"moon_illumination":52,"moon_separation":67.5,"score":60,"score_astronomy":60,"score_weather":100,"transit_alt":87.1,"transit_local":"16:25","verdict":"marginal","weather_source":"history","weekday":"Wed"},{"best_hours":0.17,"best_label":"good","best_window":"21:00\u201321:10","dark_hours":10.44,"date":"2025-10-30","moon_free_dark_hours":4.95,"moon_illumination":63,"moon_separation":69.8,"score":26,"score_astronomy":53,"score_weather":48,"transit_alt":87.1,"transit_local":"16:20","verdict":"poor","weather_source":"history","weekday":"Thu"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":10.47,"date":"2025-10-31","moon_free_dark_hours":3.78,"moon_illumination":73,"moon_separation":73.4,"score":0,"score_astronomy":47,"score_weather":0,"transit_alt":87.1,"transit_local":"16:20","verdict":"unusable","weather_source":"history","weekday":"Fri"},{"best_hours":0.58,"best_label":"good","best_window":"20:00\u201320:35","dark_hours":10.51,"date":"2025-11-01","moon_free_dark_hours":2.58,"moon_illumination":82,"moon_separation":77.9,"score":40,"score_astronomy":43,"score_weather":92,"transit_alt":87.1,"transit_local":"16:15","verdict":"marginal","weather_source":"history","weekday":"Sat"},{"best_hours":1.17,"best_label":"good","best_window":"18:50\u201320:00","dark_hours":10.55,"date":"2025-11-02","moon_free_dark_hours":1.35,"moon_illumination":90,"moon_separation":83.3,"score":31,"score_astronomy":41,"score_weather":76,"transit_alt":87.1,"transit_local":"16:10","verdict":"poor","weather_source":"history","weekday":"Sun"},{"best_hours":0.17,"best_label":"marginal","best_window":"18:50\u201319:00","dark_hours":10.58,"date":"2025-11-03","moon_free_dark_hours":0.07,"moon_illumination":96,"moon_separation":89.2,"score":5,"score_astronomy":43,"score_weather":11,"transit_alt":87.1,"transit_local":"16:05","verdict":"poor","weather_source":"history","weekday":"Mon"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":10.62,"date":"2025-11-04","moon_free_dark_hours":0.0,"moon_illumination":99,"moon_separation":95.3,"score":0,"score_astronomy":46,"score_weather":0,"transit_alt":87.1,"transit_local":"16:05","verdict":"unusable","weather_source":"history","weekday":"Tue"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":10.65,"date":"2025-11-05","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":101.1,"score":0,"score_astronomy":51,"score_weather":0,"transit_alt":87.1,"transit_local":"16:00","verdict":"unusable","weather_source":"history","weekday":"Wed"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":10.69,"date":"2025-11-06","moon_free_dark_hours":0.0,"moon_illumination":97,"moon_separation":106.2,"score":0,"score_astronomy":57,"score_weather":0,"transit_alt":87.1,"transit_local":"15:55","verdict":"unusable","weather_source":"history","weekday":"Thu"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":10.72,"date":"2025-11-07","moon_free_dark_hours":0.0,"moon_illumination":92,"moon_separation":110.3,"score":0,"score_astronomy":61,"score_weather":0,"transit_alt":87.1,"transit_local":"15:50","verdict":"unusable","weather_source":"history","weekday":"Fri"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":10.75,"date":"2025-11-08","moon_free_dark_hours":0.73,"moon_illumination":84,"moon_separation":112.9,"score":0,"score_astronomy":73,"score_weather":0,"transit_alt":87.1,"transit_local":"15:45","verdict":"unusable","weather_source":"history","weekday":"Sat"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":10.78,"date":"2025-11-09","moon_free_dark_hours":1.95,"moon_illumination":74,"moon_separation":113.9,"score":6,"score_astronomy":74,"score_weather":7,"transit_alt":87.1,"transit_local":"15:45","verdict":"poor","weather_source":"history","weekday":"Sun"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":10.82,"date":"2025-11-10","moon_free_dark_hours":3.22,"moon_illumination":64,"moon_separation":113.4,"score":0,"score_astronomy":74,"score_weather":0,"transit_alt":87.1,"transit_local":"15:40","verdict":"unusable","weather_source":"history","weekday":"Mon"},{"best_hours":2.83,"best_label":"good","best_window":"18:40\u201321:30","dark_hours":10.85,"date":"2025-11-11","moon_free_dark_hours":4.45,"moon_illumination":53,"moon_separation":111.6,"score":65,"score_astronomy":74,"score_weather":88,"transit_alt":87.1,"transit_local":"15:35","verdict":"marginal","weather_source":"history","weekday":"Tue"},{"best_hours":0.5,"best_label":"good","best_window":"21:00\u201321:30","dark_hours":10.88,"date":"2025-11-12","moon_free_dark_hours":5.62,"moon_illumination":43,"moon_separation":108.6,"score":28,"score_astronomy":72,"score_weather":38,"transit_alt":87.1,"transit_local":"15:30","verdict":"poor","weather_source":"history","weekday":"Wed"},{"best_hours":2.75,"best_label":"good","best_window":"18:40\u201321:25","dark_hours":10.91,"date":"2025-11-13","moon_free_dark_hours":6.73,"moon_illumination":33,"moon_separation":104.8,"score":70,"score_astronomy":71,"score_weather":99,"transit_alt":87.1,"transit_local":"15:25","verdict":"good","weather_source":"history","weekday":"Thu"},{"best_hours":2.75,"best_label":"good","best_window":"18:40\u201321:25","dark_hours":10.94,"date":"2025-11-14","moon_free_dark_hours":7.8,"moon_illumination":24,"moon_separation":100.5,"score":69,"score_astronomy":69,"score_weather":100,"transit_alt":87.1,"transit_local":"15:25","verdict":"marginal","weather_source":"history","weekday":"Fri"},{"best_hours":2.17,"best_label":"good","best_window":"18:40\u201320:50","dark_hours":10.97,"date":"2025-11-15","moon_free_dark_hours":8.85,"moon_illumination":16,"moon_separation":95.8,"score":62,"score_astronomy":67,"score_weather":92,"transit_alt":87.1,"transit_local":"15:20","verdict":"marginal","weather_source":"history","weekday":"Sat"},{"best_hours":0.33,"best_label":"good","best_window":"18:40\u201319:00","dark_hours":10.99,"date":"2025-11-16","moon_free_dark_hours":9.9,"moon_illumination":10,"moon_separation":91.0,"score":40,"score_astronomy":66,"score_weather":60,"transit_alt":87.1,"transit_local":"15:15","verdict":"marginal","weather_source":"history","weekday":"Sun"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":11.02,"date":"2025-11-17","moon_free_dark_hours":10.95,"moon_illumination":5,"moon_separation":86.1,"score":0,"score_astronomy":64,"score_weather":0,"transit_alt":87.1,"transit_local":"15:10","verdict":"unusable","weather_source":"history","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":"2025-10-19","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}}