{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":2.83,"best_label":"good","best_window":"23:10\u201302:00","dark_hours":4.51,"date":"2026-06-11","moon_free_dark_hours":4.07,"moon_illumination":15,"moon_separation":95.6,"score":50,"score_astronomy":100,"score_weather":50,"transit_alt":87.1,"transit_local":"02:40","verdict":"marginal","weather_source":"history","weekday":"Thu"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.49,"date":"2026-06-12","moon_free_dark_hours":4.47,"moon_illumination":7,"moon_separation":101.4,"score":0,"score_astronomy":100,"score_weather":0,"transit_alt":87.1,"transit_local":"02:35","verdict":"unusable","weather_source":"history","weekday":"Fri"},{"best_hours":4.5,"best_label":"good","best_window":"23:10\u201303:40","dark_hours":4.48,"date":"2026-06-13","moon_free_dark_hours":4.47,"moon_illumination":2,"moon_separation":106.7,"score":94,"score_astronomy":100,"score_weather":94,"transit_alt":87.1,"transit_local":"02:30","verdict":"good","weather_source":"history","weekday":"Sat"},{"best_hours":4.5,"best_label":"good","best_window":"23:10\u201303:40","dark_hours":4.46,"date":"2026-06-14","moon_free_dark_hours":4.45,"moon_illumination":0,"moon_separation":110.9,"score":92,"score_astronomy":100,"score_weather":92,"transit_alt":87.1,"transit_local":"02:25","verdict":"good","weather_source":"history","weekday":"Sun"},{"best_hours":1.67,"best_label":"good","best_window":"02:00\u201303:40","dark_hours":4.45,"date":"2026-06-15","moon_free_dark_hours":4.43,"moon_illumination":1,"moon_separation":113.7,"score":65,"score_astronomy":100,"score_weather":65,"transit_alt":87.1,"transit_local":"02:20","verdict":"marginal","weather_source":"history","weekday":"Mon"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.44,"date":"2026-06-16","moon_free_dark_hours":4.43,"moon_illumination":5,"moon_separation":114.8,"score":0,"score_astronomy":100,"score_weather":0,"transit_alt":87.1,"transit_local":"02:20","verdict":"unusable","weather_source":"history","weekday":"Tue"},{"best_hours":0.67,"best_label":"good","best_window":"03:00\u201303:40","dark_hours":4.43,"date":"2026-06-17","moon_free_dark_hours":4.18,"moon_illumination":12,"moon_separation":114.1,"score":32,"score_astronomy":100,"score_weather":32,"transit_alt":87.1,"transit_local":"02:15","verdict":"poor","weather_source":"history","weekday":"Wed"},{"best_hours":4.5,"best_label":"good","best_window":"23:10\u201303:40","dark_hours":4.43,"date":"2026-06-18","moon_free_dark_hours":3.65,"moon_illumination":20,"moon_separation":111.8,"score":74,"score_astronomy":100,"score_weather":74,"transit_alt":87.1,"transit_local":"02:10","verdict":"good","weather_source":"history","weekday":"Thu"},{"best_hours":4.5,"best_label":"good","best_window":"23:10\u201303:40","dark_hours":4.42,"date":"2026-06-19","moon_free_dark_hours":3.22,"moon_illumination":30,"moon_separation":108.3,"score":92,"score_astronomy":100,"score_weather":92,"transit_alt":87.1,"transit_local":"02:05","verdict":"good","weather_source":"history","weekday":"Fri"},{"best_hours":4.42,"best_label":"good","best_window":"23:15\u201303:40","dark_hours":4.42,"date":"2026-06-20","moon_free_dark_hours":2.85,"moon_illumination":40,"moon_separation":103.9,"score":98,"score_astronomy":100,"score_weather":98,"transit_alt":87.1,"transit_local":"02:00","verdict":"good","weather_source":"history","weekday":"Sat"},{"best_hours":4.42,"best_label":"good","best_window":"23:15\u201303:40","dark_hours":4.42,"date":"2026-06-21","moon_free_dark_hours":2.5,"moon_illumination":50,"moon_separation":99.0,"score":99,"score_astronomy":100,"score_weather":99,"transit_alt":87.1,"transit_local":"02:00","verdict":"good","weather_source":"history","weekday":"Sun"},{"best_hours":4.42,"best_label":"good","best_window":"23:15\u201303:40","dark_hours":4.42,"date":"2026-06-22","moon_free_dark_hours":2.17,"moon_illumination":60,"moon_separation":93.9,"score":89,"score_astronomy":100,"score_weather":89,"transit_alt":87.1,"transit_local":"01:55","verdict":"good","weather_source":"history","weekday":"Mon"},{"best_hours":2.67,"best_label":"good","best_window":"01:00\u201303:40","dark_hours":4.43,"date":"2026-06-23","moon_free_dark_hours":1.83,"moon_illumination":70,"moon_separation":88.7,"score":58,"score_astronomy":100,"score_weather":58,"transit_alt":87.1,"transit_local":"01:50","verdict":"marginal","weather_source":"history","weekday":"Tue"},{"best_hours":4.42,"best_label":"good","best_window":"23:15\u201303:40","dark_hours":4.43,"date":"2026-06-24","moon_free_dark_hours":1.43,"moon_illumination":78,"moon_separation":83.7,"score":86,"score_astronomy":100,"score_weather":86,"transit_alt":87.1,"transit_local":"01:45","verdict":"good","weather_source":"history","weekday":"Wed"},{"best_hours":4.42,"best_label":"good","best_window":"23:15\u201303:40","dark_hours":4.44,"date":"2026-06-25","moon_free_dark_hours":0.98,"moon_illumination":86,"moon_separation":79.0,"score":89,"score_astronomy":100,"score_weather":89,"transit_alt":87.1,"transit_local":"01:45","verdict":"good","weather_source":"history","weekday":"Thu"},{"best_hours":4.42,"best_label":"good","best_window":"23:15\u201303:40","dark_hours":4.45,"date":"2026-06-26","moon_free_dark_hours":0.43,"moon_illumination":92,"moon_separation":74.7,"score":95,"score_astronomy":100,"score_weather":95,"transit_alt":87.1,"transit_local":"01:40","verdict":"good","weather_source":"history","weekday":"Fri"},{"best_hours":2.75,"best_label":"good","best_window":"23:15\u201302:00","dark_hours":4.47,"date":"2026-06-27","moon_free_dark_hours":0.0,"moon_illumination":96,"moon_separation":71.0,"score":49,"score_astronomy":74,"score_weather":67,"transit_alt":87.1,"transit_local":"01:35","verdict":"marginal","weather_source":"history","weekday":"Sat"},{"best_hours":4.42,"best_label":"good","best_window":"23:15\u201303:40","dark_hours":4.48,"date":"2026-06-28","moon_free_dark_hours":0.0,"moon_illumination":99,"moon_separation":68.1,"score":66,"score_astronomy":66,"score_weather":100,"transit_alt":87.1,"transit_local":"01:30","verdict":"marginal","weather_source":"history","weekday":"Sun"},{"best_hours":1.0,"best_label":"good","best_window":"02:00\u201303:00","dark_hours":4.5,"date":"2026-06-29","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":66.1,"score":54,"score_astronomy":60,"score_weather":89,"transit_alt":87.1,"transit_local":"01:25","verdict":"marginal","weather_source":"history","weekday":"Mon"},{"best_hours":2.83,"best_label":"good","best_window":"23:10\u201302:00","dark_hours":4.52,"date":"2026-06-30","moon_free_dark_hours":0.0,"moon_illumination":99,"moon_separation":65.2,"score":60,"score_astronomy":62,"score_weather":96,"transit_alt":87.1,"transit_local":"01:25","verdict":"marginal","weather_source":"history","weekday":"Tue"},{"best_hours":0.83,"best_label":"marginal","best_window":"23:10\u201300:00","dark_hours":4.54,"date":"2026-07-01","moon_free_dark_hours":0.0,"moon_illumination":96,"moon_separation":65.4,"score":18,"score_astronomy":66,"score_weather":27,"transit_alt":87.1,"transit_local":"01:20","verdict":"poor","weather_source":"history","weekday":"Wed"},{"best_hours":4.58,"best_label":"marginal","best_window":"23:10\u201303:45","dark_hours":4.56,"date":"2026-07-02","moon_free_dark_hours":0.0,"moon_illumination":92,"moon_separation":66.8,"score":53,"score_astronomy":72,"score_weather":74,"transit_alt":87.1,"transit_local":"01:15","verdict":"marginal","weather_source":"history","weekday":"Thu"},{"best_hours":1.75,"best_label":"marginal","best_window":"02:00\u201303:45","dark_hours":4.58,"date":"2026-07-03","moon_free_dark_hours":0.17,"moon_illumination":86,"moon_separation":69.3,"score":31,"score_astronomy":100,"score_weather":31,"transit_alt":87.1,"transit_local":"01:10","verdict":"poor","weather_source":"history","weekday":"Fri"},{"best_hours":1.0,"best_label":"good","best_window":"01:00\u201302:00","dark_hours":4.61,"date":"2026-07-04","moon_free_dark_hours":0.53,"moon_illumination":78,"moon_separation":72.8,"score":72,"score_astronomy":100,"score_weather":72,"transit_alt":87.1,"transit_local":"01:05","verdict":"good","weather_source":"history","weekday":"Sat"},{"best_hours":4.58,"best_label":"good","best_window":"23:10\u201303:45","dark_hours":4.64,"date":"2026-07-05","moon_free_dark_hours":0.88,"moon_illumination":70,"moon_separation":77.1,"score":89,"score_astronomy":100,"score_weather":89,"transit_alt":87.1,"transit_local":"01:05","verdict":"good","weather_source":"history","weekday":"Sun"},{"best_hours":4.67,"best_label":"good","best_window":"23:10\u201303:50","dark_hours":4.67,"date":"2026-07-06","moon_free_dark_hours":1.23,"moon_illumination":59,"moon_separation":82.2,"score":97,"score_astronomy":100,"score_weather":97,"transit_alt":87.1,"transit_local":"01:00","verdict":"good","weather_source":"history","weekday":"Mon"},{"best_hours":4.67,"best_label":"good","best_window":"23:10\u201303:50","dark_hours":4.7,"date":"2026-07-07","moon_free_dark_hours":1.62,"moon_illumination":49,"moon_separation":87.7,"score":95,"score_astronomy":100,"score_weather":95,"transit_alt":87.1,"transit_local":"00:55","verdict":"good","weather_source":"history","weekday":"Tue"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.73,"date":"2026-07-08","moon_free_dark_hours":2.07,"moon_illumination":38,"moon_separation":93.4,"score":0,"score_astronomy":100,"score_weather":0,"transit_alt":87.1,"transit_local":"00:50","verdict":"unusable","weather_source":"history","weekday":"Wed"},{"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"}],"note":"score_astronomy for every night; score_weather/score only where a forecast (next 4 days) or ERA5 history exists \u2014 null otherwise","start":"2026-06-11","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}}