{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":0.08,"best_label":"good","best_window":"05:30\u201305:35","dark_hours":10.91,"date":"2037-11-13","moon_free_dark_hours":7.03,"moon_illumination":42,"moon_separation":126.7,"score":null,"score_astronomy":9,"score_weather":null,"transit_alt":50.1,"transit_local":"09:15","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":0.17,"best_label":"good","best_window":"05:25\u201305:35","dark_hours":10.94,"date":"2037-11-14","moon_free_dark_hours":6.05,"moon_illumination":52,"moon_separation":138.9,"score":null,"score_astronomy":10,"score_weather":null,"transit_alt":50.1,"transit_local":"09:15","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":0.25,"best_label":"good","best_window":"05:20\u201305:35","dark_hours":10.97,"date":"2037-11-15","moon_free_dark_hours":5.08,"moon_illumination":61,"moon_separation":150.9,"score":null,"score_astronomy":11,"score_weather":null,"transit_alt":50.2,"transit_local":"09:10","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":0.33,"best_label":"good","best_window":"05:20\u201305:40","dark_hours":11.0,"date":"2037-11-16","moon_free_dark_hours":4.13,"moon_illumination":70,"moon_separation":162.8,"score":null,"score_astronomy":14,"score_weather":null,"transit_alt":50.2,"transit_local":"09:05","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":0.42,"best_label":"good","best_window":"05:15\u201305:40","dark_hours":11.02,"date":"2037-11-17","moon_free_dark_hours":3.18,"moon_illumination":78,"moon_separation":174.6,"score":null,"score_astronomy":16,"score_weather":null,"transit_alt":50.1,"transit_local":"09:00","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":0.5,"best_label":"good","best_window":"05:10\u201305:40","dark_hours":11.05,"date":"2037-11-18","moon_free_dark_hours":2.23,"moon_illumination":86,"moon_separation":173.5,"score":null,"score_astronomy":18,"score_weather":null,"transit_alt":50.1,"transit_local":"08:55","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":0.58,"best_label":"good","best_window":"05:05\u201305:40","dark_hours":11.08,"date":"2037-11-19","moon_free_dark_hours":1.27,"moon_illumination":92,"moon_separation":161.6,"score":null,"score_astronomy":19,"score_weather":null,"transit_alt":50.1,"transit_local":"08:55","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":0.58,"best_label":"good","best_window":"05:10\u201305:45","dark_hours":11.1,"date":"2037-11-20","moon_free_dark_hours":0.28,"moon_illumination":96,"moon_separation":149.5,"score":null,"score_astronomy":20,"score_weather":null,"transit_alt":50.2,"transit_local":"08:50","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":0.58,"best_label":"good","best_window":"05:10\u201305:45","dark_hours":11.13,"date":"2037-11-21","moon_free_dark_hours":0.0,"moon_illumination":99,"moon_separation":137.3,"score":null,"score_astronomy":18,"score_weather":null,"transit_alt":50.1,"transit_local":"08:45","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":0.67,"best_label":"good","best_window":"05:05\u201305:45","dark_hours":11.15,"date":"2037-11-22","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":124.8,"score":null,"score_astronomy":19,"score_weather":null,"transit_alt":50.1,"transit_local":"08:40","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":0.58,"best_label":"good","best_window":"05:10\u201305:45","dark_hours":11.18,"date":"2037-11-23","moon_free_dark_hours":0.0,"moon_illumination":99,"moon_separation":112.2,"score":null,"score_astronomy":18,"score_weather":null,"transit_alt":50.1,"transit_local":"08:40","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":0.5,"best_label":"good","best_window":"05:15\u201305:45","dark_hours":11.2,"date":"2037-11-24","moon_free_dark_hours":0.0,"moon_illumination":96,"moon_separation":99.3,"score":null,"score_astronomy":15,"score_weather":null,"transit_alt":50.1,"transit_local":"08:35","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":1.33,"best_label":"marginal","best_window":"04:25\u201305:45","dark_hours":11.22,"date":"2037-11-25","moon_free_dark_hours":0.68,"moon_illumination":91,"moon_separation":86.3,"score":null,"score_astronomy":13,"score_weather":null,"transit_alt":50.2,"transit_local":"08:30","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":1.42,"best_label":"marginal","best_window":"04:25\u201305:50","dark_hours":11.24,"date":"2037-11-26","moon_free_dark_hours":1.62,"moon_illumination":84,"moon_separation":73.0,"score":null,"score_astronomy":12,"score_weather":null,"transit_alt":50.1,"transit_local":"08:25","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":1.42,"best_label":"marginal","best_window":"04:25\u201305:50","dark_hours":11.26,"date":"2037-11-27","moon_free_dark_hours":2.65,"moon_illumination":75,"moon_separation":59.6,"score":null,"score_astronomy":11,"score_weather":null,"transit_alt":50.1,"transit_local":"08:20","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":1.5,"best_label":"marginal","best_window":"04:20\u201305:50","dark_hours":11.28,"date":"2037-11-28","moon_free_dark_hours":3.77,"moon_illumination":65,"moon_separation":45.9,"score":null,"score_astronomy":11,"score_weather":null,"transit_alt":50.1,"transit_local":"08:20","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":1.67,"best_label":"marginal","best_window":"04:10\u201305:50","dark_hours":11.3,"date":"2037-11-29","moon_free_dark_hours":4.93,"moon_illumination":54,"moon_separation":32.1,"score":null,"score_astronomy":13,"score_weather":null,"transit_alt":50.1,"transit_local":"08:15","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":2.5,"best_label":"marginal","best_window":"03:55\u201306:25","dark_hours":11.32,"date":"2037-11-30","moon_free_dark_hours":6.1,"moon_illumination":42,"moon_separation":18.0,"score":null,"score_astronomy":18,"score_weather":null,"transit_alt":50.2,"transit_local":"08:10","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":1.25,"best_label":"good","best_window":"04:40\u201305:55","dark_hours":11.34,"date":"2037-12-01","moon_free_dark_hours":7.3,"moon_illumination":31,"moon_separation":3.8,"score":null,"score_astronomy":25,"score_weather":null,"transit_alt":50.1,"transit_local":"08:05","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":1.5,"best_label":"good","best_window":"04:25\u201305:55","dark_hours":11.35,"date":"2037-12-02","moon_free_dark_hours":8.5,"moon_illumination":21,"moon_separation":10.6,"score":null,"score_astronomy":31,"score_weather":null,"transit_alt":50.1,"transit_local":"08:00","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":1.75,"best_label":"good","best_window":"04:10\u201305:55","dark_hours":11.37,"date":"2037-12-03","moon_free_dark_hours":9.72,"moon_illumination":12,"moon_separation":25.1,"score":null,"score_astronomy":38,"score_weather":null,"transit_alt":50.1,"transit_local":"08:00","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":1.75,"best_label":"good","best_window":"04:10\u201305:55","dark_hours":11.38,"date":"2037-12-04","moon_free_dark_hours":10.95,"moon_illumination":6,"moon_separation":39.6,"score":null,"score_astronomy":43,"score_weather":null,"transit_alt":50.1,"transit_local":"07:55","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":1.83,"best_label":"good","best_window":"04:05\u201305:55","dark_hours":11.4,"date":"2037-12-05","moon_free_dark_hours":11.37,"moon_illumination":2,"moon_separation":54.0,"score":null,"score_astronomy":45,"score_weather":null,"transit_alt":50.1,"transit_local":"07:50","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":1.92,"best_label":"good","best_window":"04:00\u201305:55","dark_hours":11.41,"date":"2037-12-06","moon_free_dark_hours":11.38,"moon_illumination":0,"moon_separation":68.3,"score":null,"score_astronomy":47,"score_weather":null,"transit_alt":50.1,"transit_local":"07:45","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":2.08,"best_label":"good","best_window":"03:55\u201306:00","dark_hours":11.42,"date":"2037-12-07","moon_free_dark_hours":11.4,"moon_illumination":1,"moon_separation":82.3,"score":null,"score_astronomy":49,"score_weather":null,"transit_alt":50.1,"transit_local":"07:45","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":2.17,"best_label":"good","best_window":"03:50\u201306:00","dark_hours":11.44,"date":"2037-12-08","moon_free_dark_hours":11.42,"moon_illumination":5,"moon_separation":95.9,"score":null,"score_astronomy":51,"score_weather":null,"transit_alt":50.1,"transit_local":"07:40","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":2.17,"best_label":"good","best_window":"03:50\u201306:00","dark_hours":11.45,"date":"2037-12-09","moon_free_dark_hours":10.73,"moon_illumination":10,"moon_separation":109.2,"score":null,"score_astronomy":53,"score_weather":null,"transit_alt":50.1,"transit_local":"07:35","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":2.25,"best_label":"good","best_window":"03:45\u201306:00","dark_hours":11.46,"date":"2037-12-10","moon_free_dark_hours":9.72,"moon_illumination":17,"moon_separation":122.1,"score":null,"score_astronomy":55,"score_weather":null,"transit_alt":50.1,"transit_local":"07:30","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":2.33,"best_label":"good","best_window":"03:40\u201306:00","dark_hours":11.47,"date":"2037-12-11","moon_free_dark_hours":8.72,"moon_illumination":25,"moon_separation":134.7,"score":null,"score_astronomy":57,"score_weather":null,"transit_alt":50.1,"transit_local":"07:25","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":2.42,"best_label":"good","best_window":"03:35\u201306:00","dark_hours":11.47,"date":"2037-12-12","moon_free_dark_hours":7.72,"moon_illumination":34,"moon_separation":146.9,"score":null,"score_astronomy":57,"score_weather":null,"transit_alt":50.1,"transit_local":"07:25","verdict":"unknown","weather_source":"none","weekday":"Sat"}],"note":"score_astronomy for every night; score_weather/score only where a forecast (next 4 days) or ERA5 history exists \u2014 null otherwise","start":"2037-11-13","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}}