{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":1.92,"best_label":"good","best_window":"02:55\u201304:50","dark_hours":8.67,"date":"2038-03-21","moon_free_dark_hours":0.0,"moon_illumination":99,"moon_separation":86.4,"score":null,"score_astronomy":48,"score_weather":null,"transit_alt":87.1,"transit_local":"07:00","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":1.58,"best_label":"good","best_window":"03:15\u201304:50","dark_hours":8.61,"date":"2038-03-22","moon_free_dark_hours":0.32,"moon_illumination":95,"moon_separation":79.3,"score":null,"score_astronomy":45,"score_weather":null,"transit_alt":87.1,"transit_local":"06:55","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":1.67,"best_label":"good","best_window":"03:05\u201304:45","dark_hours":8.56,"date":"2038-03-23","moon_free_dark_hours":1.58,"moon_illumination":88,"moon_separation":72.9,"score":null,"score_astronomy":44,"score_weather":null,"transit_alt":87.1,"transit_local":"06:50","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":2.42,"best_label":"good","best_window":"02:20\u201304:45","dark_hours":8.51,"date":"2038-03-24","moon_free_dark_hours":2.82,"moon_illumination":79,"moon_separation":67.6,"score":null,"score_astronomy":48,"score_weather":null,"transit_alt":87.1,"transit_local":"06:50","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":3.5,"best_label":"good","best_window":"01:15\u201304:45","dark_hours":8.46,"date":"2038-03-25","moon_free_dark_hours":4.0,"moon_illumination":69,"moon_separation":63.8,"score":null,"score_astronomy":54,"score_weather":null,"transit_alt":87.1,"transit_local":"06:45","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":3.92,"best_label":"good","best_window":"00:45\u201304:40","dark_hours":8.4,"date":"2038-03-26","moon_free_dark_hours":5.07,"moon_illumination":59,"moon_separation":61.7,"score":null,"score_astronomy":67,"score_weather":null,"transit_alt":87.1,"transit_local":"06:40","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":4.0,"best_label":"good","best_window":"00:40\u201305:40","dark_hours":8.35,"date":"2038-03-27","moon_free_dark_hours":6.05,"moon_illumination":48,"moon_separation":61.3,"score":null,"score_astronomy":82,"score_weather":null,"transit_alt":87.1,"transit_local":"07:35","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":3.92,"best_label":"good","best_window":"01:40\u201305:35","dark_hours":8.3,"date":"2038-03-28","moon_free_dark_hours":6.88,"moon_illumination":38,"moon_separation":62.6,"score":null,"score_astronomy":93,"score_weather":null,"transit_alt":87.1,"transit_local":"07:35","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":4.0,"best_label":"good","best_window":"01:35\u201305:35","dark_hours":8.24,"date":"2038-03-29","moon_free_dark_hours":7.58,"moon_illumination":28,"moon_separation":65.2,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"07:30","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":4.08,"best_label":"good","best_window":"01:30\u201305:35","dark_hours":8.19,"date":"2038-03-30","moon_free_dark_hours":8.17,"moon_illumination":20,"moon_separation":69.0,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"07:25","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":4.08,"best_label":"good","best_window":"01:25\u201305:30","dark_hours":8.13,"date":"2038-03-31","moon_free_dark_hours":8.12,"moon_illumination":12,"moon_separation":73.6,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"07:20","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":4.17,"best_label":"good","best_window":"01:20\u201305:30","dark_hours":8.08,"date":"2038-04-01","moon_free_dark_hours":8.05,"moon_illumination":7,"moon_separation":78.7,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"07:15","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":4.08,"best_label":"good","best_window":"01:20\u201305:25","dark_hours":8.02,"date":"2038-04-02","moon_free_dark_hours":8.0,"moon_illumination":3,"moon_separation":84.3,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"07:15","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":4.17,"best_label":"good","best_window":"01:15\u201305:25","dark_hours":7.97,"date":"2038-04-03","moon_free_dark_hours":7.95,"moon_illumination":1,"moon_separation":89.9,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"07:10","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":4.25,"best_label":"good","best_window":"01:10\u201305:25","dark_hours":7.91,"date":"2038-04-04","moon_free_dark_hours":7.88,"moon_illumination":0,"moon_separation":95.6,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"07:05","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":4.25,"best_label":"good","best_window":"01:05\u201305:20","dark_hours":7.86,"date":"2038-04-05","moon_free_dark_hours":7.83,"moon_illumination":2,"moon_separation":101.0,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"07:00","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":4.25,"best_label":"good","best_window":"01:05\u201305:20","dark_hours":7.8,"date":"2038-04-06","moon_free_dark_hours":7.78,"moon_illumination":5,"moon_separation":106.1,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"06:55","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":4.33,"best_label":"good","best_window":"01:00\u201305:20","dark_hours":7.74,"date":"2038-04-07","moon_free_dark_hours":6.82,"moon_illumination":9,"moon_separation":110.6,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"06:55","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":4.33,"best_label":"good","best_window":"00:55\u201305:15","dark_hours":7.69,"date":"2038-04-08","moon_free_dark_hours":5.78,"moon_illumination":16,"moon_separation":114.3,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"06:50","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":4.42,"best_label":"good","best_window":"00:50\u201305:15","dark_hours":7.63,"date":"2038-04-09","moon_free_dark_hours":4.77,"moon_illumination":23,"moon_separation":117.0,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"06:45","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":4.33,"best_label":"good","best_window":"00:50\u201305:10","dark_hours":7.57,"date":"2038-04-10","moon_free_dark_hours":3.78,"moon_illumination":32,"moon_separation":118.4,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"06:40","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":4.33,"best_label":"good","best_window":"00:50\u201305:10","dark_hours":7.52,"date":"2038-04-11","moon_free_dark_hours":2.83,"moon_illumination":42,"moon_separation":118.4,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"06:35","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":4.42,"best_label":"good","best_window":"00:45\u201305:10","dark_hours":7.46,"date":"2038-04-12","moon_free_dark_hours":1.95,"moon_illumination":52,"moon_separation":116.8,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"06:35","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":4.33,"best_label":"good","best_window":"00:45\u201305:05","dark_hours":7.4,"date":"2038-04-13","moon_free_dark_hours":1.17,"moon_illumination":62,"moon_separation":113.7,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"06:30","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":4.33,"best_label":"good","best_window":"00:45\u201305:05","dark_hours":7.35,"date":"2038-04-14","moon_free_dark_hours":0.45,"moon_illumination":73,"moon_separation":109.2,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.1,"transit_local":"06:25","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":4.17,"best_label":"good","best_window":"00:50\u201305:00","dark_hours":7.29,"date":"2038-04-15","moon_free_dark_hours":0.0,"moon_illumination":82,"moon_separation":103.5,"score":null,"score_astronomy":88,"score_weather":null,"transit_alt":87.1,"transit_local":"06:20","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":4.0,"best_label":"good","best_window":"01:00\u201305:00","dark_hours":7.23,"date":"2038-04-16","moon_free_dark_hours":0.0,"moon_illumination":90,"moon_separation":96.9,"score":null,"score_astronomy":78,"score_weather":null,"transit_alt":87.1,"transit_local":"06:20","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":3.25,"best_label":"good","best_window":"01:45\u201305:00","dark_hours":7.17,"date":"2038-04-17","moon_free_dark_hours":0.0,"moon_illumination":96,"moon_separation":89.8,"score":null,"score_astronomy":68,"score_weather":null,"transit_alt":87.1,"transit_local":"06:15","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":2.42,"best_label":"good","best_window":"02:30\u201304:55","dark_hours":7.11,"date":"2038-04-18","moon_free_dark_hours":0.0,"moon_illumination":99,"moon_separation":82.6,"score":null,"score_astronomy":59,"score_weather":null,"transit_alt":87.1,"transit_local":"06:10","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":1.92,"best_label":"good","best_window":"03:00\u201304:55","dark_hours":7.06,"date":"2038-04-19","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":75.8,"score":null,"score_astronomy":52,"score_weather":null,"transit_alt":87.1,"transit_local":"06:05","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":"2038-03-21","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}}