{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":8.9,"date":"2025-09-25","moon_free_dark_hours":8.88,"moon_illumination":15,"moon_separation":105.0,"score":0,"score_astronomy":100,"score_weather":0,"transit_alt":87.3,"transit_local":"22:00","verdict":"unusable","weather_source":"history","weekday":"Thu"},{"best_hours":1.0,"best_label":"good","best_window":"00:00\u201301:00","dark_hours":8.95,"date":"2025-09-26","moon_free_dark_hours":8.77,"moon_illumination":22,"moon_separation":99.1,"score":20,"score_astronomy":100,"score_weather":20,"transit_alt":87.3,"transit_local":"22:00","verdict":"poor","weather_source":"history","weekday":"Fri"},{"best_hours":0.25,"best_label":"good","best_window":"20:45\u201321:00","dark_hours":9.0,"date":"2025-09-27","moon_free_dark_hours":8.18,"moon_illumination":31,"moon_separation":92.9,"score":16,"score_astronomy":100,"score_weather":16,"transit_alt":87.3,"transit_local":"21:55","verdict":"poor","weather_source":"history","weekday":"Sat"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":9.05,"date":"2025-09-28","moon_free_dark_hours":7.48,"moon_illumination":40,"moon_separation":86.6,"score":0,"score_astronomy":100,"score_weather":0,"transit_alt":87.3,"transit_local":"21:50","verdict":"unusable","weather_source":"history","weekday":"Sun"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":9.09,"date":"2025-09-29","moon_free_dark_hours":6.62,"moon_illumination":49,"moon_separation":80.3,"score":0,"score_astronomy":100,"score_weather":0,"transit_alt":87.3,"transit_local":"21:45","verdict":"unusable","weather_source":"history","weekday":"Mon"},{"best_hours":4.0,"best_label":"good","best_window":"00:00\u201304:00","dark_hours":9.14,"date":"2025-09-30","moon_free_dark_hours":5.6,"moon_illumination":59,"moon_separation":74.2,"score":50,"score_astronomy":100,"score_weather":50,"transit_alt":87.3,"transit_local":"21:40","verdict":"marginal","weather_source":"history","weekday":"Tue"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":9.19,"date":"2025-10-01","moon_free_dark_hours":4.48,"moon_illumination":69,"moon_separation":68.6,"score":0,"score_astronomy":93,"score_weather":0,"transit_alt":87.3,"transit_local":"21:40","verdict":"unusable","weather_source":"history","weekday":"Wed"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":9.24,"date":"2025-10-02","moon_free_dark_hours":3.3,"moon_illumination":78,"moon_separation":63.7,"score":0,"score_astronomy":85,"score_weather":0,"transit_alt":87.3,"transit_local":"21:35","verdict":"unusable","weather_source":"history","weekday":"Thu"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":9.29,"date":"2025-10-03","moon_free_dark_hours":2.1,"moon_illumination":86,"moon_separation":60.0,"score":0,"score_astronomy":63,"score_weather":0,"transit_alt":87.3,"transit_local":"21:30","verdict":"unusable","weather_source":"history","weekday":"Fri"},{"best_hours":7.75,"best_label":"marginal","best_window":"20:30\u201304:15","dark_hours":9.33,"date":"2025-10-04","moon_free_dark_hours":0.87,"moon_illumination":93,"moon_separation":58.1,"score":56,"score_astronomy":60,"score_weather":94,"transit_alt":87.3,"transit_local":"21:25","verdict":"marginal","weather_source":"history","weekday":"Sat"},{"best_hours":2.5,"best_label":"marginal","best_window":"20:30\u201323:00","dark_hours":9.38,"date":"2025-10-05","moon_free_dark_hours":0.0,"moon_illumination":98,"moon_separation":58.3,"score":32,"score_astronomy":57,"score_weather":56,"transit_alt":87.3,"transit_local":"21:20","verdict":"poor","weather_source":"history","weekday":"Sun"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":9.43,"date":"2025-10-06","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":60.7,"score":0,"score_astronomy":57,"score_weather":0,"transit_alt":87.3,"transit_local":"21:20","verdict":"unusable","weather_source":"history","weekday":"Mon"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":9.47,"date":"2025-10-07","moon_free_dark_hours":0.0,"moon_illumination":99,"moon_separation":65.2,"score":0,"score_astronomy":65,"score_weather":0,"transit_alt":87.3,"transit_local":"21:15","verdict":"unusable","weather_source":"history","weekday":"Tue"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":9.52,"date":"2025-10-08","moon_free_dark_hours":0.0,"moon_illumination":95,"moon_separation":71.4,"score":0,"score_astronomy":71,"score_weather":0,"transit_alt":87.3,"transit_local":"21:10","verdict":"unusable","weather_source":"history","weekday":"Wed"},{"best_hours":2.33,"best_label":"good","best_window":"20:25\u201322:45","dark_hours":9.57,"date":"2025-10-09","moon_free_dark_hours":0.0,"moon_illumination":89,"moon_separation":78.5,"score":74,"score_astronomy":78,"score_weather":95,"transit_alt":87.3,"transit_local":"21:05","verdict":"good","weather_source":"history","weekday":"Thu"},{"best_hours":4.75,"best_label":"good","best_window":"20:20\u201301:05","dark_hours":9.61,"date":"2025-10-10","moon_free_dark_hours":0.38,"moon_illumination":80,"moon_separation":86.2,"score":82,"score_astronomy":100,"score_weather":82,"transit_alt":87.3,"transit_local":"21:00","verdict":"good","weather_source":"history","weekday":"Fri"},{"best_hours":1.67,"best_label":"good","best_window":"20:20\u201322:00","dark_hours":9.66,"date":"2025-10-11","moon_free_dark_hours":1.32,"moon_illumination":70,"moon_separation":93.9,"score":38,"score_astronomy":100,"score_weather":38,"transit_alt":87.3,"transit_local":"21:00","verdict":"poor","weather_source":"history","weekday":"Sat"},{"best_hours":1.92,"best_label":"good","best_window":"01:00\u201302:55","dark_hours":9.7,"date":"2025-10-12","moon_free_dark_hours":2.43,"moon_illumination":59,"moon_separation":101.2,"score":41,"score_astronomy":100,"score_weather":41,"transit_alt":87.3,"transit_local":"20:55","verdict":"marginal","weather_source":"history","weekday":"Sun"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":9.74,"date":"2025-10-13","moon_free_dark_hours":3.63,"moon_illumination":48,"moon_separation":107.9,"score":8,"score_astronomy":100,"score_weather":8,"transit_alt":87.3,"transit_local":"20:50","verdict":"poor","weather_source":"history","weekday":"Mon"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":9.79,"date":"2025-10-14","moon_free_dark_hours":4.87,"moon_illumination":38,"moon_separation":113.5,"score":0,"score_astronomy":100,"score_weather":0,"transit_alt":87.3,"transit_local":"20:45","verdict":"unusable","weather_source":"history","weekday":"Tue"},{"best_hours":1.0,"best_label":"good","best_window":"23:00\u201300:00","dark_hours":9.83,"date":"2025-10-15","moon_free_dark_hours":6.08,"moon_illumination":28,"moon_separation":117.9,"score":12,"score_astronomy":100,"score_weather":12,"transit_alt":87.3,"transit_local":"20:45","verdict":"poor","weather_source":"history","weekday":"Wed"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":9.87,"date":"2025-10-16","moon_free_dark_hours":7.23,"moon_illumination":19,"moon_separation":120.9,"score":0,"score_astronomy":100,"score_weather":0,"transit_alt":87.3,"transit_local":"20:40","verdict":"unusable","weather_source":"history","weekday":"Thu"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":9.92,"date":"2025-10-17","moon_free_dark_hours":8.35,"moon_illumination":12,"moon_separation":122.1,"score":0,"score_astronomy":100,"score_weather":0,"transit_alt":87.3,"transit_local":"20:35","verdict":"unusable","weather_source":"history","weekday":"Fri"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":9.96,"date":"2025-10-18","moon_free_dark_hours":9.42,"moon_illumination":6,"moon_separation":121.7,"score":0,"score_astronomy":100,"score_weather":0,"transit_alt":87.3,"transit_local":"20:30","verdict":"unusable","weather_source":"history","weekday":"Sat"},{"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":119.6,"score":0,"score_astronomy":100,"score_weather":0,"transit_alt":87.3,"transit_local":"20:25","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":116.3,"score":28,"score_astronomy":100,"score_weather":28,"transit_alt":87.3,"transit_local":"20:25","verdict":"poor","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":111.8,"score":16,"score_astronomy":100,"score_weather":16,"transit_alt":87.3,"transit_local":"20:20","verdict":"poor","weather_source":"history","weekday":"Tue"},{"best_hours":3.92,"best_label":"good","best_window":"20:05\u201300:00","dark_hours":10.13,"date":"2025-10-22","moon_free_dark_hours":10.12,"moon_illumination":2,"moon_separation":106.6,"score":45,"score_astronomy":100,"score_weather":45,"transit_alt":87.3,"transit_local":"20:15","verdict":"marginal","weather_source":"history","weekday":"Wed"},{"best_hours":1.92,"best_label":"good","best_window":"20:05\u201322:00","dark_hours":10.17,"date":"2025-10-23","moon_free_dark_hours":10.15,"moon_illumination":5,"moon_separation":100.8,"score":27,"score_astronomy":100,"score_weather":27,"transit_alt":87.3,"transit_local":"20:10","verdict":"poor","weather_source":"history","weekday":"Thu"},{"best_hours":1.42,"best_label":"good","best_window":"01:00\u201302:25","dark_hours":10.21,"date":"2025-10-24","moon_free_dark_hours":10.18,"moon_illumination":10,"moon_separation":94.6,"score":61,"score_astronomy":100,"score_weather":61,"transit_alt":87.3,"transit_local":"20:05","verdict":"marginal","weather_source":"history","weekday":"Fri"}],"note":"score_astronomy for every night; score_weather/score only where a forecast (next 4 days) or ERA5 history exists \u2014 null otherwise","start":"2025-09-25","target":{"dec":44.25788576,"name":"EM* LkHA 190","ra":314.72388973,"simbad_url":"https://simbad.cds.unistra.fr/simbad/sim-id?Ident=V1057%20Cyg","source":"sesame","spectral_type":"F7/G3I/IIe","type":"Or*","type_text":"Orion-type variable \u2014 a young, erupting star","vmag":12.33}}