{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":4.25,"best_label":"good","best_window":"20:00\u201300:15","dark_hours":10.2,"date":"2030-10-24","moon_free_dark_hours":10.05,"moon_illumination":5,"moon_separation":117.3,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"19:10","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":4.25,"best_label":"good","best_window":"20:00\u201300:15","dark_hours":10.24,"date":"2030-10-25","moon_free_dark_hours":10.22,"moon_illumination":1,"moon_separation":106.5,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"19:05","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":4.17,"best_label":"good","best_window":"20:00\u201300:10","dark_hours":10.28,"date":"2030-10-26","moon_free_dark_hours":10.27,"moon_illumination":0,"moon_separation":95.0,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"19:05","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":4.08,"best_label":"good","best_window":"19:00\u201323:05","dark_hours":10.32,"date":"2030-10-27","moon_free_dark_hours":10.3,"moon_illumination":2,"moon_separation":83.3,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"18:00","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":4.08,"best_label":"good","best_window":"18:55\u201323:00","dark_hours":10.35,"date":"2030-10-28","moon_free_dark_hours":10.33,"moon_illumination":6,"moon_separation":71.6,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"17:55","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":4.0,"best_label":"good","best_window":"18:55\u201322:55","dark_hours":10.39,"date":"2030-10-29","moon_free_dark_hours":9.97,"moon_illumination":13,"moon_separation":60.6,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"17:50","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":4.0,"best_label":"good","best_window":"18:55\u201322:55","dark_hours":10.43,"date":"2030-10-30","moon_free_dark_hours":8.9,"moon_illumination":22,"moon_separation":50.7,"score":null,"score_astronomy":95,"score_weather":null,"transit_alt":71.1,"transit_local":"17:45","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":3.92,"best_label":"good","best_window":"18:55\u201322:50","dark_hours":10.47,"date":"2030-10-31","moon_free_dark_hours":7.75,"moon_illumination":32,"moon_separation":42.9,"score":null,"score_astronomy":79,"score_weather":null,"transit_alt":71.1,"transit_local":"17:45","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":3.67,"best_label":"good","best_window":"18:50\u201322:30","dark_hours":10.5,"date":"2030-11-01","moon_free_dark_hours":6.6,"moon_illumination":44,"moon_separation":38.4,"score":null,"score_astronomy":63,"score_weather":null,"transit_alt":71.1,"transit_local":"17:40","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":3.17,"best_label":"good","best_window":"18:50\u201322:00","dark_hours":10.54,"date":"2030-11-02","moon_free_dark_hours":5.48,"moon_illumination":55,"moon_separation":37.8,"score":null,"score_astronomy":49,"score_weather":null,"transit_alt":71.1,"transit_local":"17:35","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":1.0,"best_label":"good","best_window":"18:50\u201319:50","dark_hours":10.57,"date":"2030-11-03","moon_free_dark_hours":4.38,"moon_illumination":65,"moon_separation":41.3,"score":null,"score_astronomy":39,"score_weather":null,"transit_alt":71.1,"transit_local":"17:30","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":4.0,"best_label":"marginal","best_window":"18:50\u201322:50","dark_hours":10.61,"date":"2030-11-04","moon_free_dark_hours":3.32,"moon_illumination":75,"moon_separation":47.6,"score":null,"score_astronomy":33,"score_weather":null,"transit_alt":71.1,"transit_local":"17:25","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":3.83,"best_label":"marginal","best_window":"18:50\u201322:40","dark_hours":10.64,"date":"2030-11-05","moon_free_dark_hours":2.27,"moon_illumination":83,"moon_separation":55.6,"score":null,"score_astronomy":31,"score_weather":null,"transit_alt":71.1,"transit_local":"17:25","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":3.83,"best_label":"marginal","best_window":"18:45\u201322:35","dark_hours":10.68,"date":"2030-11-06","moon_free_dark_hours":1.25,"moon_illumination":90,"moon_separation":64.6,"score":null,"score_astronomy":32,"score_weather":null,"transit_alt":71.1,"transit_local":"17:20","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":0.75,"best_label":"good","best_window":"18:45\u201319:30","dark_hours":10.71,"date":"2030-11-07","moon_free_dark_hours":0.23,"moon_illumination":95,"moon_separation":74.0,"score":null,"score_astronomy":36,"score_weather":null,"transit_alt":71.1,"transit_local":"17:15","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":1.5,"best_label":"good","best_window":"18:45\u201320:15","dark_hours":10.74,"date":"2030-11-08","moon_free_dark_hours":0.0,"moon_illumination":98,"moon_separation":83.7,"score":null,"score_astronomy":42,"score_weather":null,"transit_alt":71.1,"transit_local":"17:10","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":2.25,"best_label":"good","best_window":"18:45\u201321:00","dark_hours":10.78,"date":"2030-11-09","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":93.3,"score":null,"score_astronomy":50,"score_weather":null,"transit_alt":71.1,"transit_local":"17:10","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":3.0,"best_label":"good","best_window":"18:45\u201321:45","dark_hours":10.81,"date":"2030-11-10","moon_free_dark_hours":0.0,"moon_illumination":99,"moon_separation":102.8,"score":null,"score_astronomy":58,"score_weather":null,"transit_alt":71.1,"transit_local":"17:05","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":3.08,"best_label":"good","best_window":"18:45\u201321:50","dark_hours":10.84,"date":"2030-11-11","moon_free_dark_hours":0.0,"moon_illumination":97,"moon_separation":112.0,"score":null,"score_astronomy":67,"score_weather":null,"transit_alt":71.1,"transit_local":"17:00","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":3.17,"best_label":"good","best_window":"18:40\u201321:50","dark_hours":10.87,"date":"2030-11-12","moon_free_dark_hours":0.07,"moon_illumination":93,"moon_separation":120.7,"score":null,"score_astronomy":81,"score_weather":null,"transit_alt":71.1,"transit_local":"16:55","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":3.17,"best_label":"good","best_window":"18:40\u201321:50","dark_hours":10.9,"date":"2030-11-13","moon_free_dark_hours":0.93,"moon_illumination":88,"moon_separation":128.6,"score":null,"score_astronomy":82,"score_weather":null,"transit_alt":71.1,"transit_local":"16:50","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":3.08,"best_label":"good","best_window":"18:40\u201321:45","dark_hours":10.93,"date":"2030-11-14","moon_free_dark_hours":1.87,"moon_illumination":81,"moon_separation":135.3,"score":null,"score_astronomy":82,"score_weather":null,"transit_alt":71.1,"transit_local":"16:50","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":3.08,"best_label":"good","best_window":"18:40\u201321:45","dark_hours":10.96,"date":"2030-11-15","moon_free_dark_hours":2.82,"moon_illumination":73,"moon_separation":140.2,"score":null,"score_astronomy":83,"score_weather":null,"transit_alt":71.1,"transit_local":"16:45","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":3.08,"best_label":"good","best_window":"18:40\u201321:45","dark_hours":10.99,"date":"2030-11-16","moon_free_dark_hours":3.82,"moon_illumination":64,"moon_separation":142.4,"score":null,"score_astronomy":82,"score_weather":null,"transit_alt":71.1,"transit_local":"16:40","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":3.08,"best_label":"good","best_window":"18:40\u201321:45","dark_hours":11.02,"date":"2030-11-17","moon_free_dark_hours":4.85,"moon_illumination":54,"moon_separation":141.4,"score":null,"score_astronomy":80,"score_weather":null,"transit_alt":71.1,"transit_local":"16:35","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":3.0,"best_label":"good","best_window":"18:40\u201321:40","dark_hours":11.04,"date":"2030-11-18","moon_free_dark_hours":5.88,"moon_illumination":44,"moon_separation":137.2,"score":null,"score_astronomy":78,"score_weather":null,"transit_alt":71.1,"transit_local":"16:30","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":3.0,"best_label":"good","best_window":"18:35\u201321:35","dark_hours":11.07,"date":"2030-11-19","moon_free_dark_hours":6.97,"moon_illumination":34,"moon_separation":130.3,"score":null,"score_astronomy":77,"score_weather":null,"transit_alt":71.1,"transit_local":"16:30","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":2.92,"best_label":"good","best_window":"18:35\u201321:30","dark_hours":11.1,"date":"2030-11-20","moon_free_dark_hours":8.08,"moon_illumination":24,"moon_separation":121.6,"score":null,"score_astronomy":76,"score_weather":null,"transit_alt":71.1,"transit_local":"16:25","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":2.83,"best_label":"good","best_window":"18:35\u201321:25","dark_hours":11.12,"date":"2030-11-21","moon_free_dark_hours":9.25,"moon_illumination":16,"moon_separation":111.4,"score":null,"score_astronomy":74,"score_weather":null,"transit_alt":71.1,"transit_local":"16:20","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":2.83,"best_label":"good","best_window":"18:35\u201321:25","dark_hours":11.14,"date":"2030-11-22","moon_free_dark_hours":10.47,"moon_illumination":8,"moon_separation":100.4,"score":null,"score_astronomy":72,"score_weather":null,"transit_alt":71.1,"transit_local":"16:15","verdict":"unknown","weather_source":"none","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":"2030-10-24","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}}