{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":4.58,"best_label":"good","best_window":"23:10\u201303:45","dark_hours":4.52,"date":"2030-06-30","moon_free_dark_hours":4.5,"moon_illumination":0,"moon_separation":132.1,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"02:45","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":4.58,"best_label":"good","best_window":"23:10\u201303:45","dark_hours":4.54,"date":"2030-07-01","moon_free_dark_hours":4.53,"moon_illumination":1,"moon_separation":138.0,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"02:45","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":4.58,"best_label":"good","best_window":"23:10\u201303:45","dark_hours":4.56,"date":"2030-07-02","moon_free_dark_hours":4.55,"moon_illumination":4,"moon_separation":141.5,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"02:40","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":4.58,"best_label":"good","best_window":"23:10\u201303:45","dark_hours":4.58,"date":"2030-07-03","moon_free_dark_hours":4.58,"moon_illumination":9,"moon_separation":141.7,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"02:35","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":4.58,"best_label":"good","best_window":"23:10\u201303:45","dark_hours":4.61,"date":"2030-07-04","moon_free_dark_hours":4.6,"moon_illumination":16,"moon_separation":138.6,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"02:30","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":4.67,"best_label":"good","best_window":"23:10\u201303:50","dark_hours":4.64,"date":"2030-07-05","moon_free_dark_hours":4.55,"moon_illumination":24,"moon_separation":132.5,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"02:25","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":4.67,"best_label":"good","best_window":"23:10\u201303:50","dark_hours":4.67,"date":"2030-07-06","moon_free_dark_hours":4.12,"moon_illumination":34,"moon_separation":124.4,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"02:25","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":4.67,"best_label":"good","best_window":"23:10\u201303:50","dark_hours":4.7,"date":"2030-07-07","moon_free_dark_hours":3.67,"moon_illumination":44,"moon_separation":114.9,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"02:20","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":4.75,"best_label":"good","best_window":"23:05\u201303:50","dark_hours":4.73,"date":"2030-07-08","moon_free_dark_hours":3.15,"moon_illumination":55,"moon_separation":104.5,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"02:15","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":4.75,"best_label":"good","best_window":"23:05\u201303:50","dark_hours":4.77,"date":"2030-07-09","moon_free_dark_hours":2.57,"moon_illumination":66,"moon_separation":93.5,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"02:10","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":4.83,"best_label":"good","best_window":"23:05\u201303:55","dark_hours":4.8,"date":"2030-07-10","moon_free_dark_hours":1.88,"moon_illumination":77,"moon_separation":82.1,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"02:05","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":4.83,"best_label":"good","best_window":"23:05\u201303:55","dark_hours":4.84,"date":"2030-07-11","moon_free_dark_hours":1.03,"moon_illumination":86,"moon_separation":70.8,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"02:05","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":4.08,"best_label":"good","best_window":"23:50\u201303:55","dark_hours":4.88,"date":"2030-07-12","moon_free_dark_hours":0.05,"moon_illumination":93,"moon_separation":59.9,"score":null,"score_astronomy":71,"score_weather":null,"transit_alt":71.1,"transit_local":"02:00","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":0.58,"best_label":"good","best_window":"03:20\u201303:55","dark_hours":4.92,"date":"2030-07-13","moon_free_dark_hours":0.0,"moon_illumination":98,"moon_separation":50.1,"score":null,"score_astronomy":51,"score_weather":null,"transit_alt":71.1,"transit_local":"01:55","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":5.0,"best_label":"marginal","best_window":"23:00\u201304:00","dark_hours":4.96,"date":"2030-07-14","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":42.5,"score":null,"score_astronomy":38,"score_weather":null,"transit_alt":71.1,"transit_local":"01:50","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":5.0,"best_label":"marginal","best_window":"23:00\u201304:00","dark_hours":5.0,"date":"2030-07-15","moon_free_dark_hours":0.0,"moon_illumination":99,"moon_separation":38.4,"score":null,"score_astronomy":34,"score_weather":null,"transit_alt":71.1,"transit_local":"01:50","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":5.0,"best_label":"marginal","best_window":"23:00\u201304:00","dark_hours":5.04,"date":"2030-07-16","moon_free_dark_hours":0.0,"moon_illumination":95,"moon_separation":38.7,"score":null,"score_astronomy":38,"score_weather":null,"transit_alt":71.1,"transit_local":"01:45","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":0.33,"best_label":"good","best_window":"22:55\u201323:15","dark_hours":5.09,"date":"2030-07-17","moon_free_dark_hours":0.0,"moon_illumination":89,"moon_separation":43.0,"score":null,"score_astronomy":49,"score_weather":null,"transit_alt":71.1,"transit_local":"01:40","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":2.58,"best_label":"good","best_window":"22:55\u201301:30","dark_hours":5.13,"date":"2030-07-18","moon_free_dark_hours":0.0,"moon_illumination":82,"moon_separation":50.0,"score":null,"score_astronomy":64,"score_weather":null,"transit_alt":71.1,"transit_local":"01:35","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":5.0,"best_label":"good","best_window":"22:55\u201303:55","dark_hours":5.18,"date":"2030-07-19","moon_free_dark_hours":0.25,"moon_illumination":73,"moon_separation":58.4,"score":null,"score_astronomy":96,"score_weather":null,"transit_alt":71.1,"transit_local":"01:30","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":5.17,"best_label":"good","best_window":"22:55\u201304:05","dark_hours":5.23,"date":"2030-07-20","moon_free_dark_hours":0.73,"moon_illumination":64,"moon_separation":67.5,"score":null,"score_astronomy":99,"score_weather":null,"transit_alt":71.1,"transit_local":"01:30","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":5.33,"best_label":"good","best_window":"22:50\u201304:10","dark_hours":5.27,"date":"2030-07-21","moon_free_dark_hours":1.22,"moon_illumination":54,"moon_separation":76.9,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"01:25","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":5.33,"best_label":"good","best_window":"22:50\u201304:10","dark_hours":5.32,"date":"2030-07-22","moon_free_dark_hours":1.73,"moon_illumination":44,"moon_separation":86.4,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"01:20","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":5.33,"best_label":"good","best_window":"22:50\u201304:10","dark_hours":5.37,"date":"2030-07-23","moon_free_dark_hours":2.35,"moon_illumination":35,"moon_separation":95.7,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"01:15","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":5.42,"best_label":"good","best_window":"22:50\u201304:15","dark_hours":5.42,"date":"2030-07-24","moon_free_dark_hours":3.0,"moon_illumination":26,"moon_separation":105.0,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"01:10","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":5.5,"best_label":"good","best_window":"22:45\u201304:15","dark_hours":5.48,"date":"2030-07-25","moon_free_dark_hours":3.78,"moon_illumination":18,"moon_separation":113.9,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"01:10","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":5.5,"best_label":"good","best_window":"22:45\u201304:15","dark_hours":5.53,"date":"2030-07-26","moon_free_dark_hours":4.62,"moon_illumination":12,"moon_separation":122.5,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"01:05","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":5.58,"best_label":"good","best_window":"22:45\u201304:20","dark_hours":5.58,"date":"2030-07-27","moon_free_dark_hours":5.57,"moon_illumination":6,"moon_separation":130.2,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"01:00","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":5.67,"best_label":"good","best_window":"22:40\u201304:20","dark_hours":5.63,"date":"2030-07-28","moon_free_dark_hours":5.62,"moon_illumination":2,"moon_separation":136.6,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"00:55","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":5.67,"best_label":"good","best_window":"22:40\u201304:20","dark_hours":5.69,"date":"2030-07-29","moon_free_dark_hours":5.67,"moon_illumination":0,"moon_separation":140.8,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":71.1,"transit_local":"00:55","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":"2030-06-30","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}}