{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":4.75,"best_label":"good","best_window":"23:05\u201303:50","dark_hours":4.76,"date":"2026-07-09","moon_free_dark_hours":2.6,"moon_illumination":27,"moon_separation":99.2,"score":91,"score_astronomy":100,"score_weather":91,"transit_alt":87.1,"transit_local":"00:50","verdict":"good","weather_source":"history","weekday":"Thu"},{"best_hours":4.83,"best_label":"good","best_window":"23:05\u201303:55","dark_hours":4.8,"date":"2026-07-10","moon_free_dark_hours":3.3,"moon_illumination":17,"moon_separation":104.6,"score":96,"score_astronomy":100,"score_weather":96,"transit_alt":87.1,"transit_local":"00:45","verdict":"good","weather_source":"history","weekday":"Fri"},{"best_hours":4.83,"best_label":"good","best_window":"23:05\u201303:55","dark_hours":4.84,"date":"2026-07-11","moon_free_dark_hours":4.18,"moon_illumination":9,"moon_separation":109.2,"score":100,"score_astronomy":100,"score_weather":100,"transit_alt":87.1,"transit_local":"00:40","verdict":"good","weather_source":"history","weekday":"Sat"},{"best_hours":4.83,"best_label":"good","best_window":"23:05\u201303:55","dark_hours":4.87,"date":"2026-07-12","moon_free_dark_hours":4.87,"moon_illumination":3,"moon_separation":112.7,"score":89,"score_astronomy":100,"score_weather":89,"transit_alt":87.1,"transit_local":"00:35","verdict":"good","weather_source":"history","weekday":"Sun"},{"best_hours":4.92,"best_label":"good","best_window":"23:00\u201303:55","dark_hours":4.91,"date":"2026-07-13","moon_free_dark_hours":4.9,"moon_illumination":0,"moon_separation":114.6,"score":89,"score_astronomy":100,"score_weather":89,"transit_alt":87.1,"transit_local":"00:30","verdict":"good","weather_source":"history","weekday":"Mon"},{"best_hours":5.0,"best_label":"good","best_window":"23:00\u201304:00","dark_hours":4.96,"date":"2026-07-14","moon_free_dark_hours":4.93,"moon_illumination":0,"moon_separation":114.7,"score":98,"score_astronomy":100,"score_weather":98,"transit_alt":87.1,"transit_local":"00:30","verdict":"good","weather_source":"history","weekday":"Tue"},{"best_hours":2.0,"best_label":"good","best_window":"02:00\u201304:00","dark_hours":5.0,"date":"2026-07-15","moon_free_dark_hours":4.98,"moon_illumination":3,"moon_separation":113.0,"score":57,"score_astronomy":100,"score_weather":57,"transit_alt":87.1,"transit_local":"00:25","verdict":"marginal","weather_source":"history","weekday":"Wed"},{"best_hours":1.0,"best_label":"good","best_window":"23:00\u201300:00","dark_hours":5.04,"date":"2026-07-16","moon_free_dark_hours":5.02,"moon_illumination":9,"moon_separation":109.9,"score":22,"score_astronomy":100,"score_weather":22,"transit_alt":87.1,"transit_local":"00:20","verdict":"poor","weather_source":"history","weekday":"Thu"},{"best_hours":5.08,"best_label":"good","best_window":"22:55\u201304:00","dark_hours":5.08,"date":"2026-07-17","moon_free_dark_hours":5.07,"moon_illumination":16,"moon_separation":105.7,"score":98,"score_astronomy":100,"score_weather":98,"transit_alt":87.1,"transit_local":"00:15","verdict":"good","weather_source":"history","weekday":"Fri"},{"best_hours":5.17,"best_label":"good","best_window":"22:55\u201304:05","dark_hours":5.13,"date":"2026-07-18","moon_free_dark_hours":4.9,"moon_illumination":25,"moon_separation":100.9,"score":95,"score_astronomy":100,"score_weather":95,"transit_alt":87.1,"transit_local":"00:10","verdict":"good","weather_source":"history","weekday":"Sat"},{"best_hours":5.17,"best_label":"good","best_window":"22:55\u201304:05","dark_hours":5.18,"date":"2026-07-19","moon_free_dark_hours":4.57,"moon_illumination":35,"moon_separation":95.7,"score":98,"score_astronomy":100,"score_weather":98,"transit_alt":87.1,"transit_local":"00:10","verdict":"good","weather_source":"history","weekday":"Sun"},{"best_hours":2.08,"best_label":"good","best_window":"02:00\u201304:05","dark_hours":5.22,"date":"2026-07-20","moon_free_dark_hours":4.25,"moon_illumination":45,"moon_separation":90.4,"score":53,"score_astronomy":100,"score_weather":53,"transit_alt":87.1,"transit_local":"00:05","verdict":"marginal","weather_source":"history","weekday":"Mon"},{"best_hours":4.0,"best_label":"good","best_window":"23:00\u201303:00","dark_hours":5.27,"date":"2026-07-21","moon_free_dark_hours":3.87,"moon_illumination":55,"moon_separation":85.2,"score":73,"score_astronomy":100,"score_weather":73,"transit_alt":87.1,"transit_local":"00:00","verdict":"good","weather_source":"history","weekday":"Tue"},{"best_hours":5.33,"best_label":"good","best_window":"22:50\u201304:10","dark_hours":5.32,"date":"2026-07-22","moon_free_dark_hours":3.47,"moon_illumination":64,"moon_separation":80.4,"score":96,"score_astronomy":100,"score_weather":96,"transit_alt":87.1,"transit_local":"23:55","verdict":"good","weather_source":"history","weekday":"Wed"},{"best_hours":3.0,"best_label":"good","best_window":"23:00\u201302:00","dark_hours":5.37,"date":"2026-07-23","moon_free_dark_hours":2.97,"moon_illumination":73,"moon_separation":75.9,"score":61,"score_astronomy":100,"score_weather":61,"transit_alt":87.1,"transit_local":"23:50","verdict":"marginal","weather_source":"history","weekday":"Thu"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":5.42,"date":"2026-07-24","moon_free_dark_hours":2.37,"moon_illumination":81,"moon_separation":72.0,"score":0,"score_astronomy":100,"score_weather":0,"transit_alt":87.1,"transit_local":"23:50","verdict":"unusable","weather_source":"history","weekday":"Fri"},{"best_hours":3.25,"best_label":"good","best_window":"01:00\u201304:15","dark_hours":5.47,"date":"2026-07-25","moon_free_dark_hours":1.62,"moon_illumination":88,"moon_separation":68.9,"score":85,"score_astronomy":98,"score_weather":87,"transit_alt":87.1,"transit_local":"23:45","verdict":"good","weather_source":"history","weekday":"Sat"},{"best_hours":4.08,"best_label":"good","best_window":"00:00\u201304:05","dark_hours":5.52,"date":"2026-07-26","moon_free_dark_hours":0.75,"moon_illumination":93,"moon_separation":66.6,"score":79,"score_astronomy":91,"score_weather":87,"transit_alt":87.1,"transit_local":"23:40","verdict":"good","weather_source":"history","weekday":"Sun"},{"best_hours":5.58,"best_label":"good","best_window":"22:45\u201304:20","dark_hours":5.58,"date":"2026-07-27","moon_free_dark_hours":0.0,"moon_illumination":97,"moon_separation":65.3,"score":65,"score_astronomy":66,"score_weather":99,"transit_alt":87.1,"transit_local":"23:35","verdict":"marginal","weather_source":"history","weekday":"Mon"},{"best_hours":0.17,"best_label":"good","best_window":"23:00\u201323:10","dark_hours":5.63,"date":"2026-07-28","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":65.2,"score":59,"score_astronomy":65,"score_weather":90,"transit_alt":87.1,"transit_local":"23:35","verdict":"marginal","weather_source":"history","weekday":"Tue"},{"best_hours":3.5,"best_label":"good","best_window":"22:40\u201302:10","dark_hours":5.68,"date":"2026-07-29","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":66.3,"score":65,"score_astronomy":65,"score_weather":100,"transit_alt":87.1,"transit_local":"23:30","verdict":"marginal","weather_source":"history","weekday":"Wed"},{"best_hours":3.42,"best_label":"good","best_window":"22:40\u201302:05","dark_hours":5.74,"date":"2026-07-30","moon_free_dark_hours":0.0,"moon_illumination":98,"moon_separation":68.5,"score":68,"score_astronomy":68,"score_weather":100,"transit_alt":87.1,"transit_local":"23:25","verdict":"marginal","weather_source":"history","weekday":"Thu"},{"best_hours":3.83,"best_label":"good","best_window":"22:35\u201302:25","dark_hours":5.79,"date":"2026-07-31","moon_free_dark_hours":0.0,"moon_illumination":95,"moon_separation":71.8,"score":73,"score_astronomy":73,"score_weather":100,"transit_alt":87.1,"transit_local":"23:20","verdict":"good","weather_source":"history","weekday":"Fri"},{"best_hours":4.33,"best_label":"good","best_window":"22:35\u201302:55","dark_hours":5.85,"date":"2026-08-01","moon_free_dark_hours":0.0,"moon_illumination":89,"moon_separation":76.0,"score":77,"score_astronomy":77,"score_weather":100,"transit_alt":87.1,"transit_local":"23:15","verdict":"good","weather_source":"history","weekday":"Sat"},{"best_hours":5.0,"best_label":"good","best_window":"22:35\u201303:35","dark_hours":5.9,"date":"2026-08-02","moon_free_dark_hours":0.0,"moon_illumination":82,"moon_separation":80.8,"score":81,"score_astronomy":82,"score_weather":99,"transit_alt":87.1,"transit_local":"23:15","verdict":"good","weather_source":"history","weekday":"Sun"},{"best_hours":5.92,"best_label":"good","best_window":"22:30\u201304:25","dark_hours":5.96,"date":"2026-08-03","moon_free_dark_hours":0.32,"moon_illumination":73,"moon_separation":86.2,"score":99,"score_astronomy":100,"score_weather":99,"transit_alt":87.1,"transit_local":"23:10","verdict":"good","weather_source":"history","weekday":"Mon"},{"best_hours":6.0,"best_label":"good","best_window":"22:30\u201304:30","dark_hours":6.01,"date":"2026-08-04","moon_free_dark_hours":0.75,"moon_illumination":63,"moon_separation":91.9,"score":95,"score_astronomy":100,"score_weather":95,"transit_alt":87.1,"transit_local":"23:05","verdict":"good","weather_source":"history","weekday":"Tue"},{"best_hours":6.0,"best_label":"good","best_window":"22:30\u201304:30","dark_hours":6.07,"date":"2026-08-05","moon_free_dark_hours":1.23,"moon_illumination":52,"moon_separation":97.5,"score":90,"score_astronomy":100,"score_weather":90,"transit_alt":87.1,"transit_local":"23:00","verdict":"good","weather_source":"history","weekday":"Wed"},{"best_hours":6.17,"best_label":"good","best_window":"22:25\u201304:35","dark_hours":6.13,"date":"2026-08-06","moon_free_dark_hours":1.87,"moon_illumination":40,"moon_separation":102.9,"score":90,"score_astronomy":100,"score_weather":90,"transit_alt":87.1,"transit_local":"22:55","verdict":"good","weather_source":"history","weekday":"Thu"},{"best_hours":6.17,"best_label":"good","best_window":"22:25\u201304:35","dark_hours":6.18,"date":"2026-08-07","moon_free_dark_hours":2.67,"moon_illumination":30,"moon_separation":107.7,"score":97,"score_astronomy":100,"score_weather":97,"transit_alt":87.1,"transit_local":"22:55","verdict":"good","weather_source":"history","weekday":"Fri"}],"note":"score_astronomy for every night; score_weather/score only where a forecast (next 4 days) or ERA5 history exists \u2014 null otherwise","start":"2026-07-09","target":{"common_name":"Vega","dec":38.78368896,"name":"* alf Lyr","ra":279.23473479,"simbad_url":"https://simbad.cds.unistra.fr/simbad/sim-id?Ident=Vega","source":"sesame","spectral_type":"A0V","type":"dS*","type_text":"delta Scuti variable","vmag":0.03}}