{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":3.58,"best_label":"good","best_window":"01:20\u201304:55","dark_hours":8.86,"date":"2029-03-17","moon_free_dark_hours":7.98,"moon_illumination":7,"moon_separation":91.5,"score":null,"score_astronomy":94,"score_weather":null,"transit_alt":87.1,"transit_local":"07:15","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":3.67,"best_label":"good","best_window":"01:15\u201304:55","dark_hours":8.81,"date":"2029-03-18","moon_free_dark_hours":6.95,"moon_illumination":12,"moon_separation":97.2,"score":null,"score_astronomy":96,"score_weather":null,"transit_alt":87.1,"transit_local":"07:10","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":3.67,"best_label":"good","best_window":"01:15\u201304:55","dark_hours":8.76,"date":"2029-03-19","moon_free_dark_hours":5.93,"moon_illumination":19,"moon_separation":102.7,"score":null,"score_astronomy":97,"score_weather":null,"transit_alt":87.1,"transit_local":"07:05","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":3.67,"best_label":"good","best_window":"01:10\u201304:50","dark_hours":8.71,"date":"2029-03-20","moon_free_dark_hours":4.92,"moon_illumination":27,"moon_separation":107.8,"score":null,"score_astronomy":97,"score_weather":null,"transit_alt":87.1,"transit_local":"07:05","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":3.75,"best_label":"good","best_window":"01:05\u201304:50","dark_hours":8.66,"date":"2029-03-21","moon_free_dark_hours":3.95,"moon_illumination":36,"moon_separation":112.3,"score":null,"score_astronomy":98,"score_weather":null,"transit_alt":87.1,"transit_local":"07:00","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":3.75,"best_label":"good","best_window":"01:05\u201304:50","dark_hours":8.6,"date":"2029-03-22","moon_free_dark_hours":3.05,"moon_illumination":46,"moon_separation":115.9,"score":null,"score_astronomy":98,"score_weather":null,"transit_alt":87.1,"transit_local":"06:55","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":3.67,"best_label":"good","best_window":"01:05\u201304:45","dark_hours":8.55,"date":"2029-03-23","moon_free_dark_hours":2.27,"moon_illumination":56,"moon_separation":118.3,"score":null,"score_astronomy":98,"score_weather":null,"transit_alt":87.1,"transit_local":"06:50","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":3.75,"best_label":"good","best_window":"01:00\u201305:45","dark_hours":8.5,"date":"2029-03-24","moon_free_dark_hours":1.55,"moon_illumination":67,"moon_separation":119.1,"score":null,"score_astronomy":98,"score_weather":null,"transit_alt":87.1,"transit_local":"07:45","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":3.67,"best_label":"good","best_window":"02:00\u201305:40","dark_hours":8.45,"date":"2029-03-25","moon_free_dark_hours":0.93,"moon_illumination":77,"moon_separation":118.3,"score":null,"score_astronomy":96,"score_weather":null,"transit_alt":87.1,"transit_local":"07:45","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":3.67,"best_label":"good","best_window":"02:00\u201305:40","dark_hours":8.39,"date":"2029-03-26","moon_free_dark_hours":0.37,"moon_illumination":86,"moon_separation":115.5,"score":null,"score_astronomy":93,"score_weather":null,"transit_alt":87.1,"transit_local":"07:40","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":3.67,"best_label":"good","best_window":"02:00\u201305:40","dark_hours":8.34,"date":"2029-03-27","moon_free_dark_hours":0.0,"moon_illumination":93,"moon_separation":111.1,"score":null,"score_astronomy":80,"score_weather":null,"transit_alt":87.1,"transit_local":"07:35","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":3.58,"best_label":"good","best_window":"02:00\u201305:35","dark_hours":8.28,"date":"2029-03-28","moon_free_dark_hours":0.0,"moon_illumination":98,"moon_separation":105.2,"score":null,"score_astronomy":73,"score_weather":null,"transit_alt":87.1,"transit_local":"07:30","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":3.42,"best_label":"good","best_window":"02:10\u201305:35","dark_hours":8.23,"date":"2029-03-29","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":98.3,"score":null,"score_astronomy":66,"score_weather":null,"transit_alt":87.1,"transit_local":"07:30","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":3.08,"best_label":"good","best_window":"02:30\u201305:35","dark_hours":8.18,"date":"2029-03-30","moon_free_dark_hours":0.0,"moon_illumination":99,"moon_separation":90.9,"score":null,"score_astronomy":60,"score_weather":null,"transit_alt":87.1,"transit_local":"07:25","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":2.83,"best_label":"good","best_window":"02:40\u201305:30","dark_hours":8.12,"date":"2029-03-31","moon_free_dark_hours":0.65,"moon_illumination":95,"moon_separation":83.6,"score":null,"score_astronomy":56,"score_weather":null,"transit_alt":87.1,"transit_local":"07:20","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":3.08,"best_label":"good","best_window":"02:25\u201305:30","dark_hours":8.07,"date":"2029-04-01","moon_free_dark_hours":1.95,"moon_illumination":88,"moon_separation":76.7,"score":null,"score_astronomy":55,"score_weather":null,"transit_alt":87.1,"transit_local":"07:15","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":3.67,"best_label":"good","best_window":"01:45\u201305:25","dark_hours":8.01,"date":"2029-04-02","moon_free_dark_hours":3.13,"moon_illumination":80,"moon_separation":70.7,"score":null,"score_astronomy":57,"score_weather":null,"transit_alt":87.1,"transit_local":"07:10","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":4.17,"best_label":"good","best_window":"01:15\u201305:25","dark_hours":7.96,"date":"2029-04-03","moon_free_dark_hours":4.15,"moon_illumination":70,"moon_separation":65.9,"score":null,"score_astronomy":65,"score_weather":null,"transit_alt":87.1,"transit_local":"07:10","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":4.25,"best_label":"good","best_window":"01:10\u201305:25","dark_hours":7.9,"date":"2029-04-04","moon_free_dark_hours":5.02,"moon_illumination":59,"moon_separation":62.6,"score":null,"score_astronomy":81,"score_weather":null,"transit_alt":87.1,"transit_local":"07:05","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":4.25,"best_label":"good","best_window":"01:05\u201305:20","dark_hours":7.85,"date":"2029-04-05","moon_free_dark_hours":5.7,"moon_illumination":49,"moon_separation":61.0,"score":null,"score_astronomy":91,"score_weather":null,"transit_alt":87.1,"transit_local":"07:00","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":4.33,"best_label":"good","best_window":"01:00\u201305:20","dark_hours":7.79,"date":"2029-04-06","moon_free_dark_hours":6.25,"moon_illumination":39,"moon_separation":60.9,"score":null,"score_astronomy":95,"score_weather":null,"transit_alt":87.1,"transit_local":"06:55","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":4.25,"best_label":"good","best_window":"01:00\u201305:15","dark_hours":7.73,"date":"2029-04-07","moon_free_dark_hours":6.72,"moon_illumination":29,"moon_separation":62.4,"score":null,"score_astronomy":99,"score_weather":null,"transit_alt":87.1,"transit_local":"06:50","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":4.33,"best_label":"good","best_window":"00:55\u201305:15","dark_hours":7.68,"date":"2029-04-08","moon_free_dark_hours":7.1,"moon_illumination":21,"moon_separation":65.2,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"06:50","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":4.42,"best_label":"good","best_window":"00:50\u201305:15","dark_hours":7.62,"date":"2029-04-09","moon_free_dark_hours":7.47,"moon_illumination":14,"moon_separation":69.0,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"06:45","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":4.42,"best_label":"good","best_window":"00:45\u201305:10","dark_hours":7.56,"date":"2029-04-10","moon_free_dark_hours":7.53,"moon_illumination":8,"moon_separation":73.6,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"06:40","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":4.5,"best_label":"good","best_window":"00:40\u201305:10","dark_hours":7.51,"date":"2029-04-11","moon_free_dark_hours":7.48,"moon_illumination":4,"moon_separation":78.8,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"06:35","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":4.42,"best_label":"good","best_window":"00:40\u201305:05","dark_hours":7.45,"date":"2029-04-12","moon_free_dark_hours":7.43,"moon_illumination":1,"moon_separation":84.4,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"06:35","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":4.5,"best_label":"good","best_window":"00:35\u201305:05","dark_hours":7.39,"date":"2029-04-13","moon_free_dark_hours":7.37,"moon_illumination":0,"moon_separation":90.1,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"06:30","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":4.58,"best_label":"good","best_window":"00:30\u201305:05","dark_hours":7.33,"date":"2029-04-14","moon_free_dark_hours":7.32,"moon_illumination":1,"moon_separation":95.9,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"06:25","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":4.58,"best_label":"good","best_window":"00:25\u201305:00","dark_hours":7.28,"date":"2029-04-15","moon_free_dark_hours":7.17,"moon_illumination":4,"moon_separation":101.5,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"06:20","verdict":"unknown","weather_source":"none","weekday":"Sun"}],"note":"score_astronomy for every night; score_weather/score only where a forecast (next 4 days) or ERA5 history exists \u2014 null otherwise","start":"2029-03-17","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}}
