{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":8.25,"best_label":"marginal","best_window":"21:10\u201305:25","dark_hours":8.25,"date":"2027-09-13","moon_free_dark_hours":0.13,"moon_illumination":96,"moon_separation":56.6,"score":null,"score_astronomy":58,"score_weather":null,"transit_alt":87.3,"transit_local":"22:50","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":8.33,"best_label":"marginal","best_window":"21:10\u201305:30","dark_hours":8.31,"date":"2027-09-14","moon_free_dark_hours":0.0,"moon_illumination":99,"moon_separation":54.9,"score":null,"score_astronomy":57,"score_weather":null,"transit_alt":87.3,"transit_local":"22:45","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":8.08,"best_label":"marginal","best_window":"21:10\u201305:15","dark_hours":8.36,"date":"2027-09-15","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":55.0,"score":null,"score_astronomy":57,"score_weather":null,"transit_alt":87.3,"transit_local":"22:45","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":0.17,"best_label":"good","best_window":"21:05\u201321:15","dark_hours":8.41,"date":"2027-09-16","moon_free_dark_hours":0.0,"moon_illumination":99,"moon_separation":56.9,"score":null,"score_astronomy":61,"score_weather":null,"transit_alt":87.3,"transit_local":"22:40","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":1.08,"best_label":"good","best_window":"21:05\u201322:10","dark_hours":8.46,"date":"2027-09-17","moon_free_dark_hours":0.0,"moon_illumination":96,"moon_separation":60.5,"score":null,"score_astronomy":65,"score_weather":null,"transit_alt":87.3,"transit_local":"22:35","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":2.75,"best_label":"good","best_window":"21:00\u201323:45","dark_hours":8.52,"date":"2027-09-18","moon_free_dark_hours":0.0,"moon_illumination":91,"moon_separation":65.5,"score":null,"score_astronomy":72,"score_weather":null,"transit_alt":87.3,"transit_local":"22:30","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":4.67,"best_label":"good","best_window":"21:00\u201301:40","dark_hours":8.57,"date":"2027-09-19","moon_free_dark_hours":0.0,"moon_illumination":84,"moon_separation":71.7,"score":null,"score_astronomy":78,"score_weather":null,"transit_alt":87.3,"transit_local":"22:25","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":5.92,"best_label":"good","best_window":"21:00\u201302:55","dark_hours":8.62,"date":"2027-09-20","moon_free_dark_hours":0.37,"moon_illumination":76,"moon_separation":78.8,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.3,"transit_local":"22:25","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":7.17,"best_label":"good","best_window":"20:55\u201304:05","dark_hours":8.67,"date":"2027-09-21","moon_free_dark_hours":1.13,"moon_illumination":66,"moon_separation":86.3,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.3,"transit_local":"22:20","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":7.33,"best_label":"good","best_window":"20:55\u201304:15","dark_hours":8.72,"date":"2027-09-22","moon_free_dark_hours":2.08,"moon_illumination":56,"moon_separation":94.2,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.3,"transit_local":"22:15","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":7.42,"best_label":"good","best_window":"20:55\u201304:20","dark_hours":8.77,"date":"2027-09-23","moon_free_dark_hours":3.18,"moon_illumination":44,"moon_separation":102.0,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.3,"transit_local":"22:10","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":7.5,"best_label":"good","best_window":"20:50\u201304:20","dark_hours":8.82,"date":"2027-09-24","moon_free_dark_hours":4.43,"moon_illumination":33,"moon_separation":109.5,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.3,"transit_local":"22:05","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":7.5,"best_label":"good","best_window":"20:50\u201304:20","dark_hours":8.87,"date":"2027-09-25","moon_free_dark_hours":5.75,"moon_illumination":23,"moon_separation":116.1,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.3,"transit_local":"22:05","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":7.58,"best_label":"good","best_window":"20:45\u201304:20","dark_hours":8.92,"date":"2027-09-26","moon_free_dark_hours":7.08,"moon_illumination":14,"moon_separation":121.4,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.3,"transit_local":"22:00","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":7.5,"best_label":"good","best_window":"20:45\u201304:15","dark_hours":8.97,"date":"2027-09-27","moon_free_dark_hours":8.4,"moon_illumination":7,"moon_separation":124.6,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.3,"transit_local":"21:55","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":7.42,"best_label":"good","best_window":"20:45\u201304:10","dark_hours":9.02,"date":"2027-09-28","moon_free_dark_hours":9.0,"moon_illumination":2,"moon_separation":125.2,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.3,"transit_local":"21:50","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":7.42,"best_label":"good","best_window":"20:40\u201304:05","dark_hours":9.07,"date":"2027-09-29","moon_free_dark_hours":9.05,"moon_illumination":0,"moon_separation":123.3,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.3,"transit_local":"21:50","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":7.42,"best_label":"good","best_window":"20:40\u201304:05","dark_hours":9.12,"date":"2027-09-30","moon_free_dark_hours":9.1,"moon_illumination":1,"moon_separation":119.1,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.3,"transit_local":"21:45","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":7.33,"best_label":"good","best_window":"20:40\u201304:00","dark_hours":9.17,"date":"2027-10-01","moon_free_dark_hours":9.15,"moon_illumination":4,"moon_separation":113.3,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.3,"transit_local":"21:40","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":7.33,"best_label":"good","best_window":"20:35\u201303:55","dark_hours":9.22,"date":"2027-10-02","moon_free_dark_hours":9.2,"moon_illumination":10,"moon_separation":106.5,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.3,"transit_local":"21:35","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":7.25,"best_label":"good","best_window":"20:35\u201303:50","dark_hours":9.26,"date":"2027-10-03","moon_free_dark_hours":9.25,"moon_illumination":17,"moon_separation":99.3,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.3,"transit_local":"21:30","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":7.25,"best_label":"good","best_window":"20:35\u201303:50","dark_hours":9.31,"date":"2027-10-04","moon_free_dark_hours":8.67,"moon_illumination":26,"moon_separation":91.9,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.3,"transit_local":"21:30","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":7.25,"best_label":"good","best_window":"20:30\u201303:45","dark_hours":9.36,"date":"2027-10-05","moon_free_dark_hours":7.83,"moon_illumination":35,"moon_separation":84.7,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.3,"transit_local":"21:25","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":7.17,"best_label":"good","best_window":"20:30\u201303:40","dark_hours":9.4,"date":"2027-10-06","moon_free_dark_hours":6.9,"moon_illumination":44,"moon_separation":77.8,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.3,"transit_local":"21:20","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":7.08,"best_label":"good","best_window":"20:30\u201303:35","dark_hours":9.45,"date":"2027-10-07","moon_free_dark_hours":5.9,"moon_illumination":54,"moon_separation":71.4,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.3,"transit_local":"21:15","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":7.08,"best_label":"good","best_window":"20:25\u201303:30","dark_hours":9.5,"date":"2027-10-08","moon_free_dark_hours":4.88,"moon_illumination":63,"moon_separation":65.7,"score":null,"score_astronomy":92,"score_weather":null,"transit_alt":87.3,"transit_local":"21:10","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":7.08,"best_label":"good","best_window":"20:25\u201303:30","dark_hours":9.54,"date":"2027-10-09","moon_free_dark_hours":3.85,"moon_illumination":72,"moon_separation":60.9,"score":null,"score_astronomy":85,"score_weather":null,"transit_alt":87.3,"transit_local":"21:10","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":6.08,"best_label":"good","best_window":"20:25\u201302:30","dark_hours":9.59,"date":"2027-10-10","moon_free_dark_hours":2.83,"moon_illumination":80,"moon_separation":57.3,"score":null,"score_astronomy":67,"score_weather":null,"transit_alt":87.3,"transit_local":"21:05","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":7.5,"best_label":"marginal","best_window":"20:20\u201303:50","dark_hours":9.63,"date":"2027-10-11","moon_free_dark_hours":1.83,"moon_illumination":87,"moon_separation":55.1,"score":null,"score_astronomy":58,"score_weather":null,"transit_alt":87.3,"transit_local":"21:00","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":7.25,"best_label":"marginal","best_window":"20:20\u201303:35","dark_hours":9.68,"date":"2027-10-12","moon_free_dark_hours":0.82,"moon_illumination":93,"moon_separation":54.7,"score":null,"score_astronomy":53,"score_weather":null,"transit_alt":87.3,"transit_local":"20:55","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":"2027-09-13","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}}