{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":2.33,"best_label":"good","best_window":"02:35\u201304:55","dark_hours":7.09,"date":"2032-04-18","moon_free_dark_hours":1.73,"moon_illumination":62,"moon_separation":142.8,"score":null,"score_astronomy":61,"score_weather":null,"transit_alt":71.1,"transit_local":"07:30","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":2.33,"best_label":"good","best_window":"02:35\u201304:55","dark_hours":7.03,"date":"2032-04-19","moon_free_dark_hours":1.2,"moon_illumination":71,"moon_separation":140.1,"score":null,"score_astronomy":62,"score_weather":null,"transit_alt":71.1,"transit_local":"07:30","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":2.33,"best_label":"good","best_window":"02:30\u201304:50","dark_hours":6.97,"date":"2032-04-20","moon_free_dark_hours":0.7,"moon_illumination":79,"moon_separation":134.7,"score":null,"score_astronomy":61,"score_weather":null,"transit_alt":71.1,"transit_local":"07:25","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":2.42,"best_label":"good","best_window":"02:25\u201304:50","dark_hours":6.91,"date":"2032-04-21","moon_free_dark_hours":0.2,"moon_illumination":86,"moon_separation":127.5,"score":null,"score_astronomy":61,"score_weather":null,"transit_alt":71.1,"transit_local":"07:20","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":2.33,"best_label":"good","best_window":"02:25\u201304:45","dark_hours":6.86,"date":"2032-04-22","moon_free_dark_hours":0.0,"moon_illumination":92,"moon_separation":119.0,"score":null,"score_astronomy":54,"score_weather":null,"transit_alt":71.1,"transit_local":"07:15","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":2.33,"best_label":"good","best_window":"02:25\u201304:45","dark_hours":6.8,"date":"2032-04-23","moon_free_dark_hours":0.0,"moon_illumination":97,"moon_separation":109.6,"score":null,"score_astronomy":50,"score_weather":null,"transit_alt":71.1,"transit_local":"07:10","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":2.25,"best_label":"good","best_window":"02:30\u201304:45","dark_hours":6.74,"date":"2032-04-24","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":99.6,"score":null,"score_astronomy":44,"score_weather":null,"transit_alt":71.1,"transit_local":"07:10","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":1.67,"best_label":"good","best_window":"03:00\u201304:40","dark_hours":6.68,"date":"2032-04-25","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":89.2,"score":null,"score_astronomy":37,"score_weather":null,"transit_alt":71.1,"transit_local":"07:05","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":1.0,"best_label":"good","best_window":"03:40\u201304:40","dark_hours":6.62,"date":"2032-04-26","moon_free_dark_hours":0.0,"moon_illumination":98,"moon_separation":78.6,"score":null,"score_astronomy":33,"score_weather":null,"transit_alt":71.1,"transit_local":"07:00","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":0.42,"best_label":"good","best_window":"04:15\u201304:40","dark_hours":6.56,"date":"2032-04-27","moon_free_dark_hours":0.4,"moon_illumination":94,"moon_separation":68.1,"score":null,"score_astronomy":29,"score_weather":null,"transit_alt":71.1,"transit_local":"06:55","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":3.08,"best_label":"marginal","best_window":"01:30\u201304:35","dark_hours":6.51,"date":"2032-04-28","moon_free_dark_hours":1.37,"moon_illumination":88,"moon_separation":58.0,"score":null,"score_astronomy":27,"score_weather":null,"transit_alt":71.1,"transit_local":"06:55","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":3.17,"best_label":"marginal","best_window":"01:25\u201304:35","dark_hours":6.45,"date":"2032-04-29","moon_free_dark_hours":2.25,"moon_illumination":79,"moon_separation":48.8,"score":null,"score_astronomy":29,"score_weather":null,"transit_alt":71.1,"transit_local":"06:50","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":0.92,"best_label":"good","best_window":"03:35\u201304:30","dark_hours":6.39,"date":"2032-04-30","moon_free_dark_hours":3.03,"moon_illumination":69,"moon_separation":41.5,"score":null,"score_astronomy":32,"score_weather":null,"transit_alt":71.1,"transit_local":"06:45","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":2.42,"best_label":"good","best_window":"02:05\u201304:30","dark_hours":6.33,"date":"2032-05-01","moon_free_dark_hours":3.75,"moon_illumination":58,"moon_separation":37.4,"score":null,"score_astronomy":41,"score_weather":null,"transit_alt":71.1,"transit_local":"06:40","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":2.92,"best_label":"good","best_window":"01:35\u201304:30","dark_hours":6.27,"date":"2032-05-02","moon_free_dark_hours":4.37,"moon_illumination":47,"moon_separation":37.6,"score":null,"score_astronomy":56,"score_weather":null,"transit_alt":71.1,"transit_local":"06:35","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":2.92,"best_label":"good","best_window":"01:30\u201304:25","dark_hours":6.22,"date":"2032-05-03","moon_free_dark_hours":4.92,"moon_illumination":36,"moon_separation":42.1,"score":null,"score_astronomy":65,"score_weather":null,"transit_alt":71.1,"transit_local":"06:35","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":2.92,"best_label":"good","best_window":"01:30\u201304:25","dark_hours":6.16,"date":"2032-05-04","moon_free_dark_hours":5.47,"moon_illumination":25,"moon_separation":49.7,"score":null,"score_astronomy":73,"score_weather":null,"transit_alt":71.1,"transit_local":"06:30","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":3.0,"best_label":"good","best_window":"01:25\u201304:25","dark_hours":6.1,"date":"2032-05-05","moon_free_dark_hours":5.98,"moon_illumination":16,"moon_separation":59.2,"score":null,"score_astronomy":79,"score_weather":null,"transit_alt":71.1,"transit_local":"06:25","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":3.0,"best_label":"good","best_window":"01:20\u201304:20","dark_hours":6.04,"date":"2032-05-06","moon_free_dark_hours":6.02,"moon_illumination":8,"moon_separation":69.7,"score":null,"score_astronomy":80,"score_weather":null,"transit_alt":71.1,"transit_local":"06:20","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":3.08,"best_label":"good","best_window":"01:15\u201304:20","dark_hours":5.99,"date":"2032-05-07","moon_free_dark_hours":5.98,"moon_illumination":3,"moon_separation":80.7,"score":null,"score_astronomy":82,"score_weather":null,"transit_alt":71.1,"transit_local":"06:15","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":3.17,"best_label":"good","best_window":"01:10\u201304:20","dark_hours":5.93,"date":"2032-05-08","moon_free_dark_hours":5.92,"moon_illumination":0,"moon_separation":91.6,"score":null,"score_astronomy":84,"score_weather":null,"transit_alt":71.1,"transit_local":"06:15","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":3.08,"best_label":"good","best_window":"01:10\u201304:15","dark_hours":5.88,"date":"2032-05-09","moon_free_dark_hours":5.85,"moon_illumination":0,"moon_separation":102.4,"score":null,"score_astronomy":85,"score_weather":null,"transit_alt":71.1,"transit_local":"06:10","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":3.17,"best_label":"good","best_window":"01:05\u201304:15","dark_hours":5.82,"date":"2032-05-10","moon_free_dark_hours":5.8,"moon_illumination":2,"moon_separation":112.6,"score":null,"score_astronomy":87,"score_weather":null,"transit_alt":71.1,"transit_local":"06:05","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":3.25,"best_label":"good","best_window":"01:00\u201304:15","dark_hours":5.76,"date":"2032-05-11","moon_free_dark_hours":5.75,"moon_illumination":6,"moon_separation":122.1,"score":null,"score_astronomy":87,"score_weather":null,"transit_alt":71.1,"transit_local":"06:00","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":3.25,"best_label":"good","best_window":"00:55\u201304:10","dark_hours":5.71,"date":"2032-05-12","moon_free_dark_hours":4.95,"moon_illumination":12,"moon_separation":130.5,"score":null,"score_astronomy":88,"score_weather":null,"transit_alt":71.1,"transit_local":"05:55","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":3.33,"best_label":"good","best_window":"00:50\u201304:10","dark_hours":5.66,"date":"2032-05-13","moon_free_dark_hours":4.18,"moon_illumination":19,"moon_separation":137.2,"score":null,"score_astronomy":90,"score_weather":null,"transit_alt":71.1,"transit_local":"05:55","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":3.33,"best_label":"good","best_window":"00:50\u201304:10","dark_hours":5.6,"date":"2032-05-14","moon_free_dark_hours":3.53,"moon_illumination":27,"moon_separation":141.6,"score":null,"score_astronomy":91,"score_weather":null,"transit_alt":71.1,"transit_local":"05:50","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":3.33,"best_label":"good","best_window":"00:45\u201304:05","dark_hours":5.55,"date":"2032-05-15","moon_free_dark_hours":2.93,"moon_illumination":36,"moon_separation":143.1,"score":null,"score_astronomy":91,"score_weather":null,"transit_alt":71.1,"transit_local":"05:45","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":3.33,"best_label":"good","best_window":"00:45\u201304:05","dark_hours":5.5,"date":"2032-05-16","moon_free_dark_hours":2.4,"moon_illumination":46,"moon_separation":141.3,"score":null,"score_astronomy":91,"score_weather":null,"transit_alt":71.1,"transit_local":"05:40","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":3.42,"best_label":"good","best_window":"00:40\u201304:05","dark_hours":5.44,"date":"2032-05-17","moon_free_dark_hours":1.88,"moon_illumination":55,"moon_separation":136.7,"score":null,"score_astronomy":92,"score_weather":null,"transit_alt":71.1,"transit_local":"05:40","verdict":"unknown","weather_source":"none","weekday":"Mon"}],"note":"score_astronomy for every night; score_weather/score only where a forecast (next 4 days) or ERA5 history exists \u2014 null otherwise","start":"2032-04-18","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}}