{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":6.25,"best_label":"good","best_window":"23:35\u201305:50","dark_hours":10.36,"date":"2046-02-12","moon_free_dark_hours":5.37,"moon_illumination":38,"moon_separation":144.0,"score":null,"score_astronomy":93,"score_weather":null,"transit_alt":50.1,"transit_local":"03:20","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":6.17,"best_label":"good","best_window":"23:35\u201305:45","dark_hours":10.32,"date":"2046-02-13","moon_free_dark_hours":4.25,"moon_illumination":48,"moon_separation":131.9,"score":null,"score_astronomy":93,"score_weather":null,"transit_alt":50.1,"transit_local":"03:15","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":6.25,"best_label":"good","best_window":"23:30\u201305:45","dark_hours":10.28,"date":"2046-02-14","moon_free_dark_hours":3.13,"moon_illumination":58,"moon_separation":119.3,"score":null,"score_astronomy":93,"score_weather":null,"transit_alt":50.1,"transit_local":"03:10","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":6.17,"best_label":"good","best_window":"23:35\u201305:45","dark_hours":10.24,"date":"2046-02-15","moon_free_dark_hours":2.07,"moon_illumination":68,"moon_separation":106.2,"score":null,"score_astronomy":93,"score_weather":null,"transit_alt":50.1,"transit_local":"03:10","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":6.0,"best_label":"good","best_window":"23:45\u201305:45","dark_hours":10.2,"date":"2046-02-16","moon_free_dark_hours":1.08,"moon_illumination":78,"moon_separation":92.7,"score":null,"score_astronomy":90,"score_weather":null,"transit_alt":50.1,"transit_local":"03:05","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":4.25,"best_label":"good","best_window":"01:25\u201305:40","dark_hours":10.16,"date":"2046-02-17","moon_free_dark_hours":0.27,"moon_illumination":87,"moon_separation":78.7,"score":null,"score_astronomy":86,"score_weather":null,"transit_alt":50.1,"transit_local":"03:00","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":1.08,"best_label":"good","best_window":"04:35\u201305:40","dark_hours":10.12,"date":"2046-02-18","moon_free_dark_hours":0.0,"moon_illumination":94,"moon_separation":64.2,"score":null,"score_astronomy":56,"score_weather":null,"transit_alt":50.1,"transit_local":"02:55","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":6.17,"best_label":"marginal","best_window":"23:30\u201305:40","dark_hours":10.08,"date":"2046-02-19","moon_free_dark_hours":0.0,"moon_illumination":98,"moon_separation":49.5,"score":null,"score_astronomy":38,"score_weather":null,"transit_alt":50.1,"transit_local":"02:50","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":3.42,"best_label":"marginal","best_window":"02:15\u201305:40","dark_hours":10.03,"date":"2046-02-20","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":34.7,"score":null,"score_astronomy":24,"score_weather":null,"transit_alt":50.1,"transit_local":"02:50","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":2.92,"best_label":"marginal","best_window":"02:40\u201305:35","dark_hours":9.99,"date":"2046-02-21","moon_free_dark_hours":0.0,"moon_illumination":98,"moon_separation":20.3,"score":null,"score_astronomy":21,"score_weather":null,"transit_alt":50.1,"transit_local":"02:45","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":6.58,"best_label":"marginal","best_window":"23:00\u201305:35","dark_hours":9.95,"date":"2046-02-22","moon_free_dark_hours":0.72,"moon_illumination":94,"moon_separation":9.5,"score":null,"score_astronomy":25,"score_weather":null,"transit_alt":50.1,"transit_local":"02:40","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":7.0,"best_label":"marginal","best_window":"22:35\u201305:35","dark_hours":9.91,"date":"2046-02-23","moon_free_dark_hours":2.0,"moon_illumination":87,"moon_separation":14.7,"score":null,"score_astronomy":34,"score_weather":null,"transit_alt":50.1,"transit_local":"02:35","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":0.17,"best_label":"good","best_window":"22:45\u201322:55","dark_hours":9.86,"date":"2046-02-24","moon_free_dark_hours":3.28,"moon_illumination":78,"moon_separation":27.6,"score":null,"score_astronomy":62,"score_weather":null,"transit_alt":50.1,"transit_local":"02:30","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":5.0,"best_label":"good","best_window":"22:40\u201303:40","dark_hours":9.82,"date":"2046-02-25","moon_free_dark_hours":4.52,"moon_illumination":68,"moon_separation":41.1,"score":null,"score_astronomy":86,"score_weather":null,"transit_alt":50.1,"transit_local":"02:30","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":6.83,"best_label":"good","best_window":"22:40\u201305:30","dark_hours":9.77,"date":"2046-02-26","moon_free_dark_hours":5.72,"moon_illumination":58,"moon_separation":54.3,"score":null,"score_astronomy":92,"score_weather":null,"transit_alt":50.1,"transit_local":"02:25","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":6.92,"best_label":"good","best_window":"22:35\u201305:30","dark_hours":9.73,"date":"2046-02-27","moon_free_dark_hours":6.8,"moon_illumination":47,"moon_separation":67.3,"score":null,"score_astronomy":93,"score_weather":null,"transit_alt":50.1,"transit_local":"02:20","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":6.92,"best_label":"good","best_window":"22:30\u201305:25","dark_hours":9.69,"date":"2046-02-28","moon_free_dark_hours":7.73,"moon_illumination":37,"moon_separation":79.9,"score":null,"score_astronomy":93,"score_weather":null,"transit_alt":50.1,"transit_local":"02:15","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":7.0,"best_label":"good","best_window":"22:25\u201305:25","dark_hours":9.64,"date":"2046-03-01","moon_free_dark_hours":8.5,"moon_illumination":28,"moon_separation":92.2,"score":null,"score_astronomy":93,"score_weather":null,"transit_alt":50.1,"transit_local":"02:15","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":7.08,"best_label":"good","best_window":"22:20\u201305:25","dark_hours":9.59,"date":"2046-03-02","moon_free_dark_hours":9.12,"moon_illumination":20,"moon_separation":104.3,"score":null,"score_astronomy":93,"score_weather":null,"transit_alt":50.1,"transit_local":"02:10","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":7.0,"best_label":"good","best_window":"22:20\u201305:20","dark_hours":9.55,"date":"2046-03-03","moon_free_dark_hours":9.52,"moon_illumination":12,"moon_separation":116.2,"score":null,"score_astronomy":93,"score_weather":null,"transit_alt":50.1,"transit_local":"02:05","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":7.08,"best_label":"good","best_window":"22:15\u201305:20","dark_hours":9.5,"date":"2046-03-04","moon_free_dark_hours":9.48,"moon_illumination":7,"moon_separation":128.0,"score":null,"score_astronomy":93,"score_weather":null,"transit_alt":50.1,"transit_local":"02:00","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":7.17,"best_label":"good","best_window":"22:10\u201305:20","dark_hours":9.45,"date":"2046-03-05","moon_free_dark_hours":9.43,"moon_illumination":3,"moon_separation":139.6,"score":null,"score_astronomy":93,"score_weather":null,"transit_alt":50.1,"transit_local":"01:55","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":7.17,"best_label":"good","best_window":"22:05\u201305:15","dark_hours":9.41,"date":"2046-03-06","moon_free_dark_hours":9.4,"moon_illumination":1,"moon_separation":150.9,"score":null,"score_astronomy":93,"score_weather":null,"transit_alt":50.1,"transit_local":"01:55","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":7.25,"best_label":"good","best_window":"22:00\u201305:15","dark_hours":9.36,"date":"2046-03-07","moon_free_dark_hours":9.35,"moon_illumination":0,"moon_separation":161.8,"score":null,"score_astronomy":93,"score_weather":null,"transit_alt":50.1,"transit_local":"01:50","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":7.25,"best_label":"good","best_window":"22:00\u201305:15","dark_hours":9.31,"date":"2046-03-08","moon_free_dark_hours":9.3,"moon_illumination":1,"moon_separation":170.2,"score":null,"score_astronomy":93,"score_weather":null,"transit_alt":50.1,"transit_local":"01:45","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":7.25,"best_label":"good","best_window":"21:55\u201305:10","dark_hours":9.26,"date":"2046-03-09","moon_free_dark_hours":9.0,"moon_illumination":4,"moon_separation":168.2,"score":null,"score_astronomy":93,"score_weather":null,"transit_alt":50.1,"transit_local":"01:40","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":7.33,"best_label":"good","best_window":"21:50\u201305:10","dark_hours":9.22,"date":"2046-03-10","moon_free_dark_hours":7.93,"moon_illumination":9,"moon_separation":158.4,"score":null,"score_astronomy":93,"score_weather":null,"transit_alt":50.1,"transit_local":"01:35","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":7.33,"best_label":"good","best_window":"21:50\u201305:10","dark_hours":9.17,"date":"2046-03-11","moon_free_dark_hours":6.85,"moon_illumination":15,"moon_separation":147.0,"score":null,"score_astronomy":93,"score_weather":null,"transit_alt":50.1,"transit_local":"01:35","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":7.33,"best_label":"good","best_window":"21:45\u201305:05","dark_hours":9.12,"date":"2046-03-12","moon_free_dark_hours":5.73,"moon_illumination":23,"moon_separation":135.1,"score":null,"score_astronomy":93,"score_weather":null,"transit_alt":50.1,"transit_local":"01:30","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":7.42,"best_label":"good","best_window":"21:40\u201305:05","dark_hours":9.07,"date":"2046-03-13","moon_free_dark_hours":4.63,"moon_illumination":32,"moon_separation":122.9,"score":null,"score_astronomy":93,"score_weather":null,"transit_alt":50.1,"transit_local":"01:25","verdict":"unknown","weather_source":"none","weekday":"Tue"}],"note":"score_astronomy for every night; score_weather/score only where a forecast (next 4 days) or ERA5 history exists \u2014 null otherwise","start":"2046-02-12","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}}
