{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":6.58,"best_label":"good","best_window":"22:10\u201304:45","dark_hours":6.58,"date":"2047-08-14","moon_free_dark_hours":2.32,"moon_illumination":39,"moon_separation":106.9,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.2,"transit_local":"23:50","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":6.58,"best_label":"good","best_window":"22:10\u201304:45","dark_hours":6.64,"date":"2047-08-15","moon_free_dark_hours":3.12,"moon_illumination":30,"moon_separation":115.7,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"23:45","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":6.75,"best_label":"good","best_window":"22:05\u201304:50","dark_hours":6.7,"date":"2047-08-16","moon_free_dark_hours":4.07,"moon_illumination":21,"moon_separation":123.9,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"23:45","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":6.67,"best_label":"good","best_window":"22:05\u201304:45","dark_hours":6.75,"date":"2047-08-17","moon_free_dark_hours":5.12,"moon_illumination":13,"moon_separation":131.2,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.2,"transit_local":"23:40","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":6.58,"best_label":"good","best_window":"22:05\u201304:40","dark_hours":6.81,"date":"2047-08-18","moon_free_dark_hours":6.27,"moon_illumination":7,"moon_separation":136.9,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.2,"transit_local":"23:35","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":6.67,"best_label":"good","best_window":"22:00\u201304:40","dark_hours":6.87,"date":"2047-08-19","moon_free_dark_hours":6.85,"moon_illumination":3,"moon_separation":139.8,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.2,"transit_local":"23:30","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":6.58,"best_label":"good","best_window":"22:00\u201304:35","dark_hours":6.93,"date":"2047-08-20","moon_free_dark_hours":6.92,"moon_illumination":0,"moon_separation":139.1,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"23:25","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":6.58,"best_label":"good","best_window":"21:55\u201304:30","dark_hours":6.98,"date":"2047-08-21","moon_free_dark_hours":6.97,"moon_illumination":0,"moon_separation":134.7,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"23:25","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":6.5,"best_label":"good","best_window":"21:55\u201304:25","dark_hours":7.04,"date":"2047-08-22","moon_free_dark_hours":7.03,"moon_illumination":3,"moon_separation":127.4,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.2,"transit_local":"23:20","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":6.42,"best_label":"good","best_window":"21:55\u201304:20","dark_hours":7.1,"date":"2047-08-23","moon_free_dark_hours":7.08,"moon_illumination":9,"moon_separation":118.2,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.2,"transit_local":"23:15","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":6.5,"best_label":"good","best_window":"21:50\u201304:20","dark_hours":7.15,"date":"2047-08-24","moon_free_dark_hours":7.15,"moon_illumination":16,"moon_separation":107.9,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"23:10","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":6.42,"best_label":"good","best_window":"21:50\u201304:15","dark_hours":7.21,"date":"2047-08-25","moon_free_dark_hours":7.18,"moon_illumination":26,"moon_separation":97.1,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"23:10","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":6.33,"best_label":"good","best_window":"21:50\u201304:10","dark_hours":7.27,"date":"2047-08-26","moon_free_dark_hours":6.6,"moon_illumination":36,"moon_separation":86.1,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.2,"transit_local":"23:05","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":6.33,"best_label":"good","best_window":"21:45\u201304:05","dark_hours":7.33,"date":"2047-08-27","moon_free_dark_hours":5.87,"moon_illumination":48,"moon_separation":75.3,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.2,"transit_local":"23:00","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":6.25,"best_label":"good","best_window":"21:45\u201304:00","dark_hours":7.38,"date":"2047-08-28","moon_free_dark_hours":5.0,"moon_illumination":59,"moon_separation":65.1,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.2,"transit_local":"22:55","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":6.33,"best_label":"good","best_window":"21:40\u201304:00","dark_hours":7.44,"date":"2047-08-29","moon_free_dark_hours":4.0,"moon_illumination":70,"moon_separation":55.8,"score":null,"score_astronomy":98,"score_weather":null,"transit_alt":71.1,"transit_local":"22:50","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":6.25,"best_label":"good","best_window":"21:40\u201303:55","dark_hours":7.49,"date":"2047-08-30","moon_free_dark_hours":2.9,"moon_illumination":80,"moon_separation":48.0,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":71.1,"transit_local":"22:50","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":0.42,"best_label":"good","best_window":"03:25\u201303:50","dark_hours":7.55,"date":"2047-08-31","moon_free_dark_hours":1.77,"moon_illumination":88,"moon_separation":42.4,"score":null,"score_astronomy":77,"score_weather":null,"transit_alt":71.2,"transit_local":"22:45","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":6.5,"best_label":"marginal","best_window":"21:35\u201304:05","dark_hours":7.61,"date":"2047-09-01","moon_free_dark_hours":0.63,"moon_illumination":94,"moon_separation":40.0,"score":null,"score_astronomy":42,"score_weather":null,"transit_alt":71.2,"transit_local":"22:40","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":6.25,"best_label":"marginal","best_window":"21:35\u201303:50","dark_hours":7.66,"date":"2047-09-02","moon_free_dark_hours":0.0,"moon_illumination":98,"moon_separation":41.1,"score":null,"score_astronomy":37,"score_weather":null,"transit_alt":71.2,"transit_local":"22:35","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":6.08,"best_label":"marginal","best_window":"21:30\u201303:35","dark_hours":7.72,"date":"2047-09-03","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":45.4,"score":null,"score_astronomy":38,"score_weather":null,"transit_alt":71.1,"transit_local":"22:30","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":6.0,"best_label":"marginal","best_window":"21:30\u201303:30","dark_hours":7.77,"date":"2047-09-04","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":51.8,"score":null,"score_astronomy":43,"score_weather":null,"transit_alt":71.1,"transit_local":"22:30","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":0.67,"best_label":"good","best_window":"21:30\u201322:10","dark_hours":7.83,"date":"2047-09-05","moon_free_dark_hours":0.0,"moon_illumination":97,"moon_separation":59.6,"score":null,"score_astronomy":53,"score_weather":null,"transit_alt":71.2,"transit_local":"22:25","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":2.58,"best_label":"good","best_window":"21:25\u201300:00","dark_hours":7.88,"date":"2047-09-06","moon_free_dark_hours":0.0,"moon_illumination":93,"moon_separation":68.1,"score":null,"score_astronomy":67,"score_weather":null,"transit_alt":71.2,"transit_local":"22:20","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":3.75,"best_label":"good","best_window":"21:25\u201301:10","dark_hours":7.94,"date":"2047-09-07","moon_free_dark_hours":0.0,"moon_illumination":88,"moon_separation":77.0,"score":null,"score_astronomy":77,"score_weather":null,"transit_alt":71.1,"transit_local":"22:15","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":4.92,"best_label":"good","best_window":"21:20\u201302:15","dark_hours":7.99,"date":"2047-09-08","moon_free_dark_hours":0.0,"moon_illumination":81,"moon_separation":86.0,"score":null,"score_astronomy":83,"score_weather":null,"transit_alt":71.1,"transit_local":"22:15","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":5.5,"best_label":"good","best_window":"21:20\u201302:50","dark_hours":8.05,"date":"2047-09-09","moon_free_dark_hours":0.48,"moon_illumination":73,"moon_separation":95.1,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.2,"transit_local":"22:10","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":5.58,"best_label":"good","best_window":"21:20\u201302:55","dark_hours":8.1,"date":"2047-09-10","moon_free_dark_hours":1.13,"moon_illumination":64,"moon_separation":104.1,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.2,"transit_local":"22:05","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":5.75,"best_label":"good","best_window":"21:15\u201303:00","dark_hours":8.16,"date":"2047-09-11","moon_free_dark_hours":1.9,"moon_illumination":55,"moon_separation":112.8,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.2,"transit_local":"22:00","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":5.75,"best_label":"good","best_window":"21:15\u201303:00","dark_hours":8.21,"date":"2047-09-12","moon_free_dark_hours":2.77,"moon_illumination":46,"moon_separation":121.2,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"21:55","verdict":"unknown","weather_source":"none","weekday":"Thu"}],"note":"score_astronomy for every night; score_weather/score only where a forecast (next 4 days) or ERA5 history exists \u2014 null otherwise","start":"2047-08-14","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}}