{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":7.58,"best_label":"good","best_window":"21:00\u201304:35","dark_hours":8.54,"date":"2045-03-23","moon_free_dark_hours":4.6,"moon_illumination":27,"moon_separation":118.5,"score":null,"score_astronomy":93,"score_weather":null,"transit_alt":50.1,"transit_local":"00:45","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":7.5,"best_label":"good","best_window":"21:05\u201304:35","dark_hours":8.49,"date":"2045-03-24","moon_free_dark_hours":3.43,"moon_illumination":38,"moon_separation":105.0,"score":null,"score_astronomy":93,"score_weather":null,"transit_alt":50.1,"transit_local":"00:40","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":7.42,"best_label":"good","best_window":"21:05\u201305:30","dark_hours":8.44,"date":"2045-03-25","moon_free_dark_hours":2.42,"moon_illumination":49,"moon_separation":91.2,"score":null,"score_astronomy":90,"score_weather":null,"transit_alt":50.1,"transit_local":"00:35","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":7.0,"best_label":"good","best_window":"22:25\u201305:25","dark_hours":8.39,"date":"2045-03-26","moon_free_dark_hours":1.55,"moon_illumination":60,"moon_separation":77.2,"score":null,"score_astronomy":85,"score_weather":null,"transit_alt":50.1,"transit_local":"01:35","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":4.92,"best_label":"good","best_window":"00:25\u201305:20","dark_hours":8.33,"date":"2045-03-27","moon_free_dark_hours":0.87,"moon_illumination":71,"moon_separation":63.1,"score":null,"score_astronomy":80,"score_weather":null,"transit_alt":50.1,"transit_local":"01:30","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":7.92,"best_label":"marginal","best_window":"21:40\u201305:35","dark_hours":8.28,"date":"2045-03-28","moon_free_dark_hours":0.28,"moon_illumination":81,"moon_separation":48.8,"score":null,"score_astronomy":57,"score_weather":null,"transit_alt":50.1,"transit_local":"01:25","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":7.08,"best_label":"marginal","best_window":"22:25\u201305:30","dark_hours":8.22,"date":"2045-03-29","moon_free_dark_hours":0.0,"moon_illumination":89,"moon_separation":34.6,"score":null,"score_astronomy":37,"score_weather":null,"transit_alt":50.1,"transit_local":"01:20","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":4.67,"best_label":"marginal","best_window":"00:40\u201305:20","dark_hours":8.17,"date":"2045-03-30","moon_free_dark_hours":0.0,"moon_illumination":95,"moon_separation":20.8,"score":null,"score_astronomy":27,"score_weather":null,"transit_alt":50.1,"transit_local":"01:20","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":4.33,"best_label":"marginal","best_window":"00:45\u201305:05","dark_hours":8.12,"date":"2045-03-31","moon_free_dark_hours":0.0,"moon_illumination":99,"moon_separation":9.1,"score":null,"score_astronomy":24,"score_weather":null,"transit_alt":50.1,"transit_local":"01:15","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":7.5,"best_label":"marginal","best_window":"21:25\u201304:55","dark_hours":8.06,"date":"2045-04-01","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":12.1,"score":null,"score_astronomy":26,"score_weather":null,"transit_alt":50.1,"transit_local":"01:10","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":7.42,"best_label":"marginal","best_window":"21:25\u201304:50","dark_hours":8.01,"date":"2045-04-02","moon_free_dark_hours":0.0,"moon_illumination":98,"moon_separation":24.4,"score":null,"score_astronomy":35,"score_weather":null,"transit_alt":50.1,"transit_local":"01:05","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":0.83,"best_label":"good","best_window":"21:30\u201322:20","dark_hours":7.95,"date":"2045-04-03","moon_free_dark_hours":0.83,"moon_illumination":94,"moon_separation":37.5,"score":null,"score_astronomy":83,"score_weather":null,"transit_alt":50.1,"transit_local":"01:00","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":3.75,"best_label":"good","best_window":"21:30\u201301:15","dark_hours":7.89,"date":"2045-04-04","moon_free_dark_hours":2.03,"moon_illumination":88,"moon_separation":50.5,"score":null,"score_astronomy":90,"score_weather":null,"transit_alt":50.1,"transit_local":"01:00","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":5.92,"best_label":"good","best_window":"21:30\u201303:25","dark_hours":7.84,"date":"2045-04-05","moon_free_dark_hours":3.13,"moon_illumination":81,"moon_separation":63.2,"score":null,"score_astronomy":93,"score_weather":null,"transit_alt":50.1,"transit_local":"00:55","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":6.75,"best_label":"good","best_window":"21:30\u201304:15","dark_hours":7.78,"date":"2045-04-06","moon_free_dark_hours":4.13,"moon_illumination":72,"moon_separation":75.6,"score":null,"score_astronomy":93,"score_weather":null,"transit_alt":50.1,"transit_local":"00:50","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":6.75,"best_label":"good","best_window":"21:35\u201304:20","dark_hours":7.73,"date":"2045-04-07","moon_free_dark_hours":4.98,"moon_illumination":63,"moon_separation":87.7,"score":null,"score_astronomy":93,"score_weather":null,"transit_alt":50.1,"transit_local":"00:45","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":6.83,"best_label":"good","best_window":"21:35\u201304:25","dark_hours":7.67,"date":"2045-04-08","moon_free_dark_hours":5.65,"moon_illumination":54,"moon_separation":99.5,"score":null,"score_astronomy":93,"score_weather":null,"transit_alt":50.1,"transit_local":"00:40","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":6.83,"best_label":"good","best_window":"21:35\u201304:25","dark_hours":7.61,"date":"2045-04-09","moon_free_dark_hours":6.2,"moon_illumination":44,"moon_separation":111.3,"score":null,"score_astronomy":93,"score_weather":null,"transit_alt":50.1,"transit_local":"00:40","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":6.75,"best_label":"good","best_window":"21:40\u201304:25","dark_hours":7.56,"date":"2045-04-10","moon_free_dark_hours":6.63,"moon_illumination":35,"moon_separation":123.0,"score":null,"score_astronomy":93,"score_weather":null,"transit_alt":50.1,"transit_local":"00:35","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":6.67,"best_label":"good","best_window":"21:40\u201304:20","dark_hours":7.5,"date":"2045-04-11","moon_free_dark_hours":7.02,"moon_illumination":26,"moon_separation":134.7,"score":null,"score_astronomy":93,"score_weather":null,"transit_alt":50.1,"transit_local":"00:30","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":6.67,"best_label":"good","best_window":"21:40\u201304:20","dark_hours":7.44,"date":"2045-04-12","moon_free_dark_hours":7.33,"moon_illumination":18,"moon_separation":146.4,"score":null,"score_astronomy":93,"score_weather":null,"transit_alt":50.1,"transit_local":"00:25","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":6.58,"best_label":"good","best_window":"21:40\u201304:15","dark_hours":7.39,"date":"2045-04-13","moon_free_dark_hours":7.37,"moon_illumination":12,"moon_separation":158.0,"score":null,"score_astronomy":93,"score_weather":null,"transit_alt":50.1,"transit_local":"00:25","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":6.42,"best_label":"good","best_window":"21:45\u201304:10","dark_hours":7.33,"date":"2045-04-14","moon_free_dark_hours":7.3,"moon_illumination":6,"moon_separation":168.7,"score":null,"score_astronomy":93,"score_weather":null,"transit_alt":50.1,"transit_local":"00:20","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":6.33,"best_label":"good","best_window":"21:45\u201304:05","dark_hours":7.27,"date":"2045-04-15","moon_free_dark_hours":7.25,"moon_illumination":2,"moon_separation":171.1,"score":null,"score_astronomy":93,"score_weather":null,"transit_alt":50.1,"transit_local":"00:15","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":6.25,"best_label":"good","best_window":"21:45\u201304:00","dark_hours":7.21,"date":"2045-04-16","moon_free_dark_hours":7.18,"moon_illumination":0,"moon_separation":161.0,"score":null,"score_astronomy":93,"score_weather":null,"transit_alt":50.1,"transit_local":"00:10","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":6.17,"best_label":"good","best_window":"21:50\u201304:00","dark_hours":7.15,"date":"2045-04-17","moon_free_dark_hours":7.13,"moon_illumination":1,"moon_separation":148.5,"score":null,"score_astronomy":93,"score_weather":null,"transit_alt":50.1,"transit_local":"00:05","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":6.08,"best_label":"good","best_window":"21:50\u201303:55","dark_hours":7.1,"date":"2045-04-18","moon_free_dark_hours":7.07,"moon_illumination":3,"moon_separation":135.4,"score":null,"score_astronomy":93,"score_weather":null,"transit_alt":50.1,"transit_local":"00:05","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":6.0,"best_label":"good","best_window":"21:50\u201303:50","dark_hours":7.04,"date":"2045-04-19","moon_free_dark_hours":5.9,"moon_illumination":8,"moon_separation":121.9,"score":null,"score_astronomy":93,"score_weather":null,"transit_alt":50.1,"transit_local":"00:00","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":5.83,"best_label":"good","best_window":"21:55\u201303:45","dark_hours":6.98,"date":"2045-04-20","moon_free_dark_hours":4.7,"moon_illumination":15,"moon_separation":108.2,"score":null,"score_astronomy":93,"score_weather":null,"transit_alt":50.1,"transit_local":"23:55","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":5.83,"best_label":"good","best_window":"21:55\u201303:45","dark_hours":6.92,"date":"2045-04-21","moon_free_dark_hours":3.63,"moon_illumination":24,"moon_separation":94.4,"score":null,"score_astronomy":91,"score_weather":null,"transit_alt":50.1,"transit_local":"23:50","verdict":"unknown","weather_source":"none","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":"2045-03-23","target":{"dec":2.05238823,"morphology":"E3","name":"3C 273","ra":187.27791594,"simbad_url":"https://simbad.cds.unistra.fr/simbad/sim-id?Ident=3C%20273","source":"sesame","type":"BLL","type_text":"BL Lac object \u2014 a blazar","vmag":14.83}}
