{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":2.67,"best_label":"good","best_window":"18:35\u201321:15","dark_hours":11.13,"date":"2028-11-21","moon_free_dark_hours":8.08,"moon_illumination":30,"moon_separation":40.3,"score":null,"score_astronomy":53,"score_weather":null,"transit_alt":71.1,"transit_local":"16:20","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":2.5,"best_label":"good","best_window":"18:35\u201321:05","dark_hours":11.16,"date":"2028-11-22","moon_free_dark_hours":7.03,"moon_illumination":40,"moon_separation":40.3,"score":null,"score_astronomy":45,"score_weather":null,"transit_alt":71.1,"transit_local":"16:15","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":2.17,"best_label":"good","best_window":"18:35\u201320:45","dark_hours":11.18,"date":"2028-11-23","moon_free_dark_hours":6.03,"moon_illumination":49,"moon_separation":43.3,"score":null,"score_astronomy":37,"score_weather":null,"transit_alt":71.1,"transit_local":"16:10","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":0.92,"best_label":"good","best_window":"18:35\u201319:30","dark_hours":11.2,"date":"2028-11-24","moon_free_dark_hours":5.05,"moon_illumination":59,"moon_separation":48.6,"score":null,"score_astronomy":31,"score_weather":null,"transit_alt":71.1,"transit_local":"16:05","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":0.17,"best_label":"good","best_window":"18:35\u201318:45","dark_hours":11.22,"date":"2028-11-25","moon_free_dark_hours":4.08,"moon_illumination":68,"moon_separation":55.4,"score":null,"score_astronomy":27,"score_weather":null,"transit_alt":71.1,"transit_local":"16:05","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":2.75,"best_label":"marginal","best_window":"18:35\u201321:20","dark_hours":11.25,"date":"2028-11-26","moon_free_dark_hours":3.1,"moon_illumination":76,"moon_separation":63.2,"score":null,"score_astronomy":25,"score_weather":null,"transit_alt":71.1,"transit_local":"16:00","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":3.25,"best_label":"marginal","best_window":"18:00\u201321:15","dark_hours":11.27,"date":"2028-11-27","moon_free_dark_hours":2.12,"moon_illumination":84,"moon_separation":71.8,"score":null,"score_astronomy":25,"score_weather":null,"transit_alt":71.1,"transit_local":"15:55","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":0.42,"best_label":"good","best_window":"18:35\u201319:00","dark_hours":11.29,"date":"2028-11-28","moon_free_dark_hours":1.1,"moon_illumination":90,"moon_separation":80.9,"score":null,"score_astronomy":26,"score_weather":null,"transit_alt":71.1,"transit_local":"15:50","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":0.92,"best_label":"good","best_window":"18:35\u201319:30","dark_hours":11.3,"date":"2028-11-29","moon_free_dark_hours":0.03,"moon_illumination":95,"moon_separation":90.3,"score":null,"score_astronomy":29,"score_weather":null,"transit_alt":71.1,"transit_local":"15:45","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":1.58,"best_label":"good","best_window":"18:35\u201320:10","dark_hours":11.32,"date":"2028-11-30","moon_free_dark_hours":0.0,"moon_illumination":98,"moon_separation":99.8,"score":null,"score_astronomy":33,"score_weather":null,"transit_alt":71.1,"transit_local":"15:45","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":1.83,"best_label":"good","best_window":"18:35\u201320:25","dark_hours":11.34,"date":"2028-12-01","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":109.4,"score":null,"score_astronomy":38,"score_weather":null,"transit_alt":71.1,"transit_local":"15:40","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":1.92,"best_label":"good","best_window":"18:35\u201320:30","dark_hours":11.36,"date":"2028-12-02","moon_free_dark_hours":0.0,"moon_illumination":99,"moon_separation":118.6,"score":null,"score_astronomy":43,"score_weather":null,"transit_alt":71.1,"transit_local":"15:35","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":1.92,"best_label":"good","best_window":"18:35\u201320:30","dark_hours":11.37,"date":"2028-12-03","moon_free_dark_hours":0.0,"moon_illumination":96,"moon_separation":127.1,"score":null,"score_astronomy":43,"score_weather":null,"transit_alt":71.1,"transit_local":"15:30","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":1.83,"best_label":"good","best_window":"18:35\u201320:25","dark_hours":11.39,"date":"2028-12-04","moon_free_dark_hours":0.67,"moon_illumination":91,"moon_separation":134.2,"score":null,"score_astronomy":48,"score_weather":null,"transit_alt":71.1,"transit_local":"15:25","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":1.83,"best_label":"good","best_window":"18:35\u201320:25","dark_hours":11.4,"date":"2028-12-05","moon_free_dark_hours":1.83,"moon_illumination":84,"moon_separation":138.9,"score":null,"score_astronomy":48,"score_weather":null,"transit_alt":71.1,"transit_local":"15:25","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":1.83,"best_label":"good","best_window":"18:35\u201320:25","dark_hours":11.41,"date":"2028-12-06","moon_free_dark_hours":3.02,"moon_illumination":75,"moon_separation":140.1,"score":null,"score_astronomy":47,"score_weather":null,"transit_alt":71.1,"transit_local":"15:20","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":1.75,"best_label":"good","best_window":"18:35\u201320:20","dark_hours":11.43,"date":"2028-12-07","moon_free_dark_hours":4.22,"moon_illumination":65,"moon_separation":137.4,"score":null,"score_astronomy":46,"score_weather":null,"transit_alt":71.1,"transit_local":"15:15","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":1.75,"best_label":"good","best_window":"18:35\u201320:20","dark_hours":11.44,"date":"2028-12-08","moon_free_dark_hours":5.42,"moon_illumination":54,"moon_separation":131.4,"score":null,"score_astronomy":44,"score_weather":null,"transit_alt":71.1,"transit_local":"15:10","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":1.67,"best_label":"good","best_window":"18:35\u201320:15","dark_hours":11.45,"date":"2028-12-09","moon_free_dark_hours":6.62,"moon_illumination":42,"moon_separation":123.1,"score":null,"score_astronomy":42,"score_weather":null,"transit_alt":71.1,"transit_local":"15:10","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":1.58,"best_label":"good","best_window":"18:35\u201320:10","dark_hours":11.46,"date":"2028-12-10","moon_free_dark_hours":7.83,"moon_illumination":31,"moon_separation":113.3,"score":null,"score_astronomy":40,"score_weather":null,"transit_alt":71.1,"transit_local":"15:05","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":1.5,"best_label":"good","best_window":"18:35\u201320:05","dark_hours":11.47,"date":"2028-12-11","moon_free_dark_hours":9.07,"moon_illumination":21,"moon_separation":102.8,"score":null,"score_astronomy":39,"score_weather":null,"transit_alt":71.1,"transit_local":"15:00","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":1.42,"best_label":"good","best_window":"18:35\u201320:00","dark_hours":11.48,"date":"2028-12-12","moon_free_dark_hours":10.33,"moon_illumination":12,"moon_separation":92.0,"score":null,"score_astronomy":38,"score_weather":null,"transit_alt":71.1,"transit_local":"14:55","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":1.42,"best_label":"good","best_window":"18:35\u201320:00","dark_hours":11.48,"date":"2028-12-13","moon_free_dark_hours":11.47,"moon_illumination":6,"moon_separation":81.1,"score":null,"score_astronomy":36,"score_weather":null,"transit_alt":71.1,"transit_local":"14:50","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":1.33,"best_label":"good","best_window":"18:35\u201319:55","dark_hours":11.49,"date":"2028-12-14","moon_free_dark_hours":11.47,"moon_illumination":2,"moon_separation":70.6,"score":null,"score_astronomy":34,"score_weather":null,"transit_alt":71.1,"transit_local":"14:50","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":1.25,"best_label":"good","best_window":"18:35\u201319:50","dark_hours":11.49,"date":"2028-12-15","moon_free_dark_hours":11.48,"moon_illumination":0,"moon_separation":60.7,"score":null,"score_astronomy":34,"score_weather":null,"transit_alt":71.1,"transit_local":"14:45","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":1.17,"best_label":"good","best_window":"18:35\u201319:45","dark_hours":11.5,"date":"2028-12-16","moon_free_dark_hours":11.48,"moon_illumination":1,"moon_separation":52.1,"score":null,"score_astronomy":32,"score_weather":null,"transit_alt":71.1,"transit_local":"14:40","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":1.17,"best_label":"good","best_window":"18:35\u201319:45","dark_hours":11.5,"date":"2028-12-17","moon_free_dark_hours":11.48,"moon_illumination":4,"moon_separation":45.3,"score":null,"score_astronomy":30,"score_weather":null,"transit_alt":71.1,"transit_local":"14:35","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":1.08,"best_label":"good","best_window":"18:35\u201319:40","dark_hours":11.51,"date":"2028-12-18","moon_free_dark_hours":10.75,"moon_illumination":9,"moon_separation":41.0,"score":null,"score_astronomy":27,"score_weather":null,"transit_alt":71.1,"transit_local":"14:30","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":0.92,"best_label":"good","best_window":"18:35\u201319:30","dark_hours":11.51,"date":"2028-12-19","moon_free_dark_hours":9.65,"moon_illumination":15,"moon_separation":39.8,"score":null,"score_astronomy":24,"score_weather":null,"transit_alt":71.1,"transit_local":"14:30","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":0.75,"best_label":"good","best_window":"18:35\u201319:20","dark_hours":11.51,"date":"2028-12-20","moon_free_dark_hours":8.62,"moon_illumination":23,"moon_separation":41.9,"score":null,"score_astronomy":20,"score_weather":null,"transit_alt":71.1,"transit_local":"14:25","verdict":"unknown","weather_source":"none","weekday":"Wed"}],"note":"score_astronomy for every night; score_weather/score only where a forecast (next 4 days) or ERA5 history exists \u2014 null otherwise","start":"2028-11-21","target":{"dec":22.71085365,"name":"HD 189733","ra":300.18213726,"simbad_url":"https://simbad.cds.unistra.fr/simbad/sim-id?Ident=HD%20189733","source":"sesame","spectral_type":"K2V","type":"BY*","type_text":"BY Draconis variable \u2014 a spotted, rotating star","vmag":7.648}}