{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":4.42,"best_label":"good","best_window":"23:15\u201303:40","dark_hours":4.45,"date":"2028-06-25","moon_free_dark_hours":4.43,"moon_illumination":13,"moon_separation":139.3,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"03:05","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":4.42,"best_label":"good","best_window":"23:15\u201303:40","dark_hours":4.46,"date":"2028-06-26","moon_free_dark_hours":4.15,"moon_illumination":22,"moon_separation":136.1,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"03:00","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":4.42,"best_label":"good","best_window":"23:15\u201303:40","dark_hours":4.47,"date":"2028-06-27","moon_free_dark_hours":3.7,"moon_illumination":32,"moon_separation":129.7,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"02:55","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":4.5,"best_label":"good","best_window":"23:10\u201303:40","dark_hours":4.49,"date":"2028-06-28","moon_free_dark_hours":3.3,"moon_illumination":43,"moon_separation":121.2,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"02:55","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":4.58,"best_label":"good","best_window":"23:10\u201303:45","dark_hours":4.51,"date":"2028-06-29","moon_free_dark_hours":2.88,"moon_illumination":55,"moon_separation":111.5,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"02:50","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":4.58,"best_label":"good","best_window":"23:10\u201303:45","dark_hours":4.53,"date":"2028-06-30","moon_free_dark_hours":2.4,"moon_illumination":66,"moon_separation":101.3,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"02:45","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":4.58,"best_label":"good","best_window":"23:10\u201303:45","dark_hours":4.55,"date":"2028-07-01","moon_free_dark_hours":1.87,"moon_illumination":76,"moon_separation":90.9,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"02:40","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":4.58,"best_label":"good","best_window":"23:10\u201303:45","dark_hours":4.57,"date":"2028-07-02","moon_free_dark_hours":1.23,"moon_illumination":85,"moon_separation":80.7,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"02:35","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":4.58,"best_label":"good","best_window":"23:10\u201303:45","dark_hours":4.6,"date":"2028-07-03","moon_free_dark_hours":0.48,"moon_illumination":92,"moon_separation":70.9,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"02:35","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":3.58,"best_label":"good","best_window":"00:10\u201303:45","dark_hours":4.62,"date":"2028-07-04","moon_free_dark_hours":0.0,"moon_illumination":96,"moon_separation":61.7,"score":null,"score_astronomy":65,"score_weather":null,"transit_alt":71.1,"transit_local":"02:30","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":0.83,"best_label":"good","best_window":"03:00\u201303:50","dark_hours":4.65,"date":"2028-07-05","moon_free_dark_hours":0.0,"moon_illumination":99,"moon_separation":53.5,"score":null,"score_astronomy":51,"score_weather":null,"transit_alt":71.1,"transit_local":"02:25","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":4.67,"best_label":"marginal","best_window":"23:10\u201303:50","dark_hours":4.68,"date":"2028-07-06","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":46.8,"score":null,"score_astronomy":42,"score_weather":null,"transit_alt":71.1,"transit_local":"02:20","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":4.75,"best_label":"marginal","best_window":"23:05\u201303:50","dark_hours":4.71,"date":"2028-07-07","moon_free_dark_hours":0.0,"moon_illumination":99,"moon_separation":42.3,"score":null,"score_astronomy":38,"score_weather":null,"transit_alt":71.1,"transit_local":"02:15","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":4.75,"best_label":"marginal","best_window":"23:05\u201303:50","dark_hours":4.75,"date":"2028-07-08","moon_free_dark_hours":0.0,"moon_illumination":95,"moon_separation":40.6,"score":null,"score_astronomy":40,"score_weather":null,"transit_alt":71.1,"transit_local":"02:15","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":4.83,"best_label":"marginal","best_window":"23:05\u201303:55","dark_hours":4.78,"date":"2028-07-09","moon_free_dark_hours":0.0,"moon_illumination":90,"moon_separation":41.8,"score":null,"score_astronomy":47,"score_weather":null,"transit_alt":71.1,"transit_local":"02:10","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":2.0,"best_label":"good","best_window":"23:05\u201301:05","dark_hours":4.82,"date":"2028-07-10","moon_free_dark_hours":0.0,"moon_illumination":84,"moon_separation":45.6,"score":null,"score_astronomy":57,"score_weather":null,"transit_alt":71.1,"transit_local":"02:05","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":3.92,"best_label":"good","best_window":"23:05\u201303:00","dark_hours":4.86,"date":"2028-07-11","moon_free_dark_hours":0.22,"moon_illumination":77,"moon_separation":51.4,"score":null,"score_astronomy":92,"score_weather":null,"transit_alt":71.1,"transit_local":"02:00","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":4.83,"best_label":"good","best_window":"23:05\u201303:55","dark_hours":4.9,"date":"2028-07-12","moon_free_dark_hours":0.57,"moon_illumination":68,"moon_separation":58.5,"score":null,"score_astronomy":96,"score_weather":null,"transit_alt":71.1,"transit_local":"02:00","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":5.0,"best_label":"good","best_window":"23:00\u201304:00","dark_hours":4.94,"date":"2028-07-13","moon_free_dark_hours":0.95,"moon_illumination":59,"moon_separation":66.6,"score":null,"score_astronomy":99,"score_weather":null,"transit_alt":71.1,"transit_local":"01:55","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":5.0,"best_label":"good","best_window":"23:00\u201304:00","dark_hours":4.98,"date":"2028-07-14","moon_free_dark_hours":1.37,"moon_illumination":49,"moon_separation":75.3,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"01:50","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":5.0,"best_label":"good","best_window":"23:00\u201304:00","dark_hours":5.02,"date":"2028-07-15","moon_free_dark_hours":1.85,"moon_illumination":40,"moon_separation":84.5,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"01:45","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":5.0,"best_label":"good","best_window":"23:00\u201304:00","dark_hours":5.06,"date":"2028-07-16","moon_free_dark_hours":2.4,"moon_illumination":30,"moon_separation":94.0,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"01:40","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":5.17,"best_label":"good","best_window":"22:55\u201304:05","dark_hours":5.11,"date":"2028-07-17","moon_free_dark_hours":3.1,"moon_illumination":21,"moon_separation":103.7,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"01:40","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":5.17,"best_label":"good","best_window":"22:55\u201304:05","dark_hours":5.15,"date":"2028-07-18","moon_free_dark_hours":3.98,"moon_illumination":13,"moon_separation":113.4,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"01:35","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":5.17,"best_label":"good","best_window":"22:55\u201304:05","dark_hours":5.2,"date":"2028-07-19","moon_free_dark_hours":5.02,"moon_illumination":6,"moon_separation":122.6,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"01:30","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":5.25,"best_label":"good","best_window":"22:55\u201304:10","dark_hours":5.25,"date":"2028-07-20","moon_free_dark_hours":5.23,"moon_illumination":2,"moon_separation":130.8,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"01:25","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":5.33,"best_label":"good","best_window":"22:50\u201304:10","dark_hours":5.3,"date":"2028-07-21","moon_free_dark_hours":5.28,"moon_illumination":0,"moon_separation":136.9,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"01:20","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":5.33,"best_label":"good","best_window":"22:50\u201304:10","dark_hours":5.35,"date":"2028-07-22","moon_free_dark_hours":5.33,"moon_illumination":1,"moon_separation":139.4,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"01:20","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":5.33,"best_label":"good","best_window":"22:50\u201304:10","dark_hours":5.4,"date":"2028-07-23","moon_free_dark_hours":5.38,"moon_illumination":5,"moon_separation":137.6,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"01:15","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":5.5,"best_label":"good","best_window":"22:45\u201304:15","dark_hours":5.45,"date":"2028-07-24","moon_free_dark_hours":5.43,"moon_illumination":11,"moon_separation":131.9,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"01:10","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":"2028-06-25","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}}