{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":10.87,"date":"2036-01-29","moon_free_dark_hours":10.85,"moon_illumination":2,"moon_separation":45.0,"score":null,"score_astronomy":1,"score_weather":null,"transit_alt":71.1,"transit_local":"11:45","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":10.84,"date":"2036-01-30","moon_free_dark_hours":10.47,"moon_illumination":6,"moon_separation":50.7,"score":null,"score_astronomy":1,"score_weather":null,"transit_alt":71.1,"transit_local":"11:40","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":10.8,"date":"2036-01-31","moon_free_dark_hours":9.47,"moon_illumination":11,"moon_separation":58.1,"score":null,"score_astronomy":1,"score_weather":null,"transit_alt":71.1,"transit_local":"11:40","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":10.77,"date":"2036-02-01","moon_free_dark_hours":8.47,"moon_illumination":18,"moon_separation":66.5,"score":null,"score_astronomy":1,"score_weather":null,"transit_alt":71.1,"transit_local":"11:35","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":10.74,"date":"2036-02-02","moon_free_dark_hours":7.43,"moon_illumination":26,"moon_separation":75.6,"score":null,"score_astronomy":1,"score_weather":null,"transit_alt":71.1,"transit_local":"11:30","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":0.08,"best_label":"marginal","best_window":"06:25\u201306:30","dark_hours":10.7,"date":"2036-02-03","moon_free_dark_hours":6.38,"moon_illumination":36,"moon_separation":85.3,"score":null,"score_astronomy":2,"score_weather":null,"transit_alt":71.1,"transit_local":"11:25","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":0.17,"best_label":"marginal","best_window":"06:20\u201306:30","dark_hours":10.67,"date":"2036-02-04","moon_free_dark_hours":5.3,"moon_illumination":46,"moon_separation":95.3,"score":null,"score_astronomy":2,"score_weather":null,"transit_alt":71.1,"transit_local":"11:25","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":0.17,"best_label":"marginal","best_window":"06:20\u201306:30","dark_hours":10.64,"date":"2036-02-05","moon_free_dark_hours":4.18,"moon_illumination":57,"moon_separation":105.5,"score":null,"score_astronomy":3,"score_weather":null,"transit_alt":71.1,"transit_local":"11:20","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":0.25,"best_label":"marginal","best_window":"06:15\u201306:30","dark_hours":10.6,"date":"2036-02-06","moon_free_dark_hours":3.07,"moon_illumination":68,"moon_separation":115.5,"score":null,"score_astronomy":3,"score_weather":null,"transit_alt":71.1,"transit_local":"11:15","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":0.25,"best_label":"marginal","best_window":"06:10\u201306:25","dark_hours":10.57,"date":"2036-02-07","moon_free_dark_hours":1.95,"moon_illumination":78,"moon_separation":124.9,"score":null,"score_astronomy":3,"score_weather":null,"transit_alt":71.1,"transit_local":"11:10","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":0.25,"best_label":"marginal","best_window":"05:40\u201305:55","dark_hours":10.53,"date":"2036-02-08","moon_free_dark_hours":0.87,"moon_illumination":87,"moon_separation":132.9,"score":null,"score_astronomy":4,"score_weather":null,"transit_alt":71.1,"transit_local":"11:05","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":0.42,"best_label":"marginal","best_window":"06:00\u201306:25","dark_hours":10.49,"date":"2036-02-09","moon_free_dark_hours":0.0,"moon_illumination":94,"moon_separation":138.2,"score":null,"score_astronomy":4,"score_weather":null,"transit_alt":71.1,"transit_local":"11:05","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":0.33,"best_label":"marginal","best_window":"05:30\u201305:50","dark_hours":10.46,"date":"2036-02-10","moon_free_dark_hours":0.0,"moon_illumination":98,"moon_separation":139.5,"score":null,"score_astronomy":4,"score_weather":null,"transit_alt":71.1,"transit_local":"11:00","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":0.42,"best_label":"marginal","best_window":"05:25\u201305:50","dark_hours":10.42,"date":"2036-02-11","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":136.2,"score":null,"score_astronomy":5,"score_weather":null,"transit_alt":71.1,"transit_local":"10:55","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":0.42,"best_label":"marginal","best_window":"05:25\u201305:50","dark_hours":10.38,"date":"2036-02-12","moon_free_dark_hours":0.0,"moon_illumination":98,"moon_separation":129.3,"score":null,"score_astronomy":5,"score_weather":null,"transit_alt":71.1,"transit_local":"10:50","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":0.5,"best_label":"marginal","best_window":"05:20\u201305:50","dark_hours":10.34,"date":"2036-02-13","moon_free_dark_hours":0.53,"moon_illumination":94,"moon_separation":120.4,"score":null,"score_astronomy":6,"score_weather":null,"transit_alt":71.1,"transit_local":"10:45","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":0.5,"best_label":"marginal","best_window":"05:15\u201305:45","dark_hours":10.3,"date":"2036-02-14","moon_free_dark_hours":1.68,"moon_illumination":88,"moon_separation":110.6,"score":null,"score_astronomy":6,"score_weather":null,"transit_alt":71.1,"transit_local":"10:45","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":0.58,"best_label":"marginal","best_window":"05:10\u201305:45","dark_hours":10.26,"date":"2036-02-15","moon_free_dark_hours":2.8,"moon_illumination":80,"moon_separation":100.4,"score":null,"score_astronomy":6,"score_weather":null,"transit_alt":71.1,"transit_local":"10:40","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":0.67,"best_label":"marginal","best_window":"05:05\u201305:45","dark_hours":10.22,"date":"2036-02-16","moon_free_dark_hours":3.85,"moon_illumination":70,"moon_separation":90.3,"score":null,"score_astronomy":6,"score_weather":null,"transit_alt":71.1,"transit_local":"10:35","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":0.67,"best_label":"marginal","best_window":"05:05\u201305:45","dark_hours":10.18,"date":"2036-02-17","moon_free_dark_hours":4.87,"moon_illumination":60,"moon_separation":80.6,"score":null,"score_astronomy":7,"score_weather":null,"transit_alt":71.1,"transit_local":"10:30","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":0.67,"best_label":"marginal","best_window":"05:00\u201305:40","dark_hours":10.14,"date":"2036-02-18","moon_free_dark_hours":5.85,"moon_illumination":50,"moon_separation":71.3,"score":null,"score_astronomy":7,"score_weather":null,"transit_alt":71.1,"transit_local":"10:30","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":1.25,"best_label":"marginal","best_window":"04:55\u201306:10","dark_hours":10.1,"date":"2036-02-19","moon_free_dark_hours":6.78,"moon_illumination":41,"moon_separation":62.7,"score":null,"score_astronomy":9,"score_weather":null,"transit_alt":71.1,"transit_local":"10:25","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":0.17,"best_label":"good","best_window":"05:30\u201305:40","dark_hours":10.06,"date":"2036-02-20","moon_free_dark_hours":7.67,"moon_illumination":32,"moon_separation":54.9,"score":null,"score_astronomy":11,"score_weather":null,"transit_alt":71.1,"transit_local":"10:20","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":0.17,"best_label":"good","best_window":"05:25\u201305:35","dark_hours":10.02,"date":"2036-02-21","moon_free_dark_hours":8.48,"moon_illumination":23,"moon_separation":48.3,"score":null,"score_astronomy":12,"score_weather":null,"transit_alt":71.1,"transit_local":"10:15","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":0.33,"best_label":"good","best_window":"05:15\u201305:35","dark_hours":9.97,"date":"2036-02-22","moon_free_dark_hours":9.23,"moon_illumination":16,"moon_separation":43.3,"score":null,"score_astronomy":13,"score_weather":null,"transit_alt":71.1,"transit_local":"10:10","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":0.5,"best_label":"good","best_window":"05:05\u201305:35","dark_hours":9.93,"date":"2036-02-23","moon_free_dark_hours":9.9,"moon_illumination":10,"moon_separation":40.7,"score":null,"score_astronomy":16,"score_weather":null,"transit_alt":71.1,"transit_local":"10:10","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":0.5,"best_label":"good","best_window":"05:05\u201305:35","dark_hours":9.89,"date":"2036-02-24","moon_free_dark_hours":9.87,"moon_illumination":5,"moon_separation":40.8,"score":null,"score_astronomy":18,"score_weather":null,"transit_alt":71.1,"transit_local":"10:05","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":0.5,"best_label":"good","best_window":"05:00\u201305:30","dark_hours":9.84,"date":"2036-02-25","moon_free_dark_hours":9.83,"moon_illumination":2,"moon_separation":43.7,"score":null,"score_astronomy":18,"score_weather":null,"transit_alt":71.1,"transit_local":"10:00","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":0.58,"best_label":"good","best_window":"04:55\u201305:30","dark_hours":9.8,"date":"2036-02-26","moon_free_dark_hours":9.78,"moon_illumination":0,"moon_separation":49.0,"score":null,"score_astronomy":19,"score_weather":null,"transit_alt":71.1,"transit_local":"09:55","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":0.67,"best_label":"good","best_window":"04:50\u201305:30","dark_hours":9.76,"date":"2036-02-27","moon_free_dark_hours":9.75,"moon_illumination":0,"moon_separation":56.1,"score":null,"score_astronomy":20,"score_weather":null,"transit_alt":71.1,"transit_local":"09:50","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":"2036-01-29","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}}