{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":7.5,"best_label":"good","best_window":"21:25\u201304:55","dark_hours":8.04,"date":"2035-04-02","moon_free_dark_hours":6.78,"moon_illumination":31,"moon_separation":118.6,"score":null,"score_astronomy":93,"score_weather":null,"transit_alt":50.2,"transit_local":"01:10","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":7.5,"best_label":"good","best_window":"21:25\u201304:55","dark_hours":7.98,"date":"2035-04-03","moon_free_dark_hours":7.4,"moon_illumination":22,"moon_separation":131.1,"score":null,"score_astronomy":93,"score_weather":null,"transit_alt":50.2,"transit_local":"01:05","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":7.33,"best_label":"good","best_window":"21:30\u201304:50","dark_hours":7.93,"date":"2035-04-04","moon_free_dark_hours":7.92,"moon_illumination":14,"moon_separation":143.9,"score":null,"score_astronomy":93,"score_weather":null,"transit_alt":50.2,"transit_local":"01:00","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":7.33,"best_label":"good","best_window":"21:30\u201304:50","dark_hours":7.87,"date":"2035-04-05","moon_free_dark_hours":7.85,"moon_illumination":8,"moon_separation":157.1,"score":null,"score_astronomy":93,"score_weather":null,"transit_alt":50.2,"transit_local":"00:55","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":7.25,"best_label":"good","best_window":"21:30\u201304:45","dark_hours":7.82,"date":"2035-04-06","moon_free_dark_hours":7.8,"moon_illumination":3,"moon_separation":170.4,"score":null,"score_astronomy":93,"score_weather":null,"transit_alt":50.2,"transit_local":"00:50","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":7.08,"best_label":"good","best_window":"21:35\u201304:40","dark_hours":7.76,"date":"2035-04-07","moon_free_dark_hours":7.73,"moon_illumination":0,"moon_separation":174.4,"score":null,"score_astronomy":93,"score_weather":null,"transit_alt":50.2,"transit_local":"00:50","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":7.0,"best_label":"good","best_window":"21:35\u201304:35","dark_hours":7.7,"date":"2035-04-08","moon_free_dark_hours":7.68,"moon_illumination":0,"moon_separation":160.6,"score":null,"score_astronomy":93,"score_weather":null,"transit_alt":50.2,"transit_local":"00:45","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":6.92,"best_label":"good","best_window":"21:35\u201304:30","dark_hours":7.65,"date":"2035-04-09","moon_free_dark_hours":7.63,"moon_illumination":3,"moon_separation":146.1,"score":null,"score_astronomy":93,"score_weather":null,"transit_alt":50.2,"transit_local":"00:40","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":6.92,"best_label":"good","best_window":"21:35\u201304:30","dark_hours":7.59,"date":"2035-04-10","moon_free_dark_hours":6.88,"moon_illumination":8,"moon_separation":131.5,"score":null,"score_astronomy":93,"score_weather":null,"transit_alt":50.2,"transit_local":"00:35","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":6.75,"best_label":"good","best_window":"21:40\u201304:25","dark_hours":7.53,"date":"2035-04-11","moon_free_dark_hours":5.68,"moon_illumination":16,"moon_separation":116.9,"score":null,"score_astronomy":93,"score_weather":null,"transit_alt":50.2,"transit_local":"00:30","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":6.67,"best_label":"good","best_window":"21:40\u201304:20","dark_hours":7.48,"date":"2035-04-12","moon_free_dark_hours":4.57,"moon_illumination":26,"moon_separation":102.4,"score":null,"score_astronomy":93,"score_weather":null,"transit_alt":50.2,"transit_local":"00:30","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":6.58,"best_label":"good","best_window":"21:40\u201304:15","dark_hours":7.42,"date":"2035-04-13","moon_free_dark_hours":3.53,"moon_illumination":37,"moon_separation":88.1,"score":null,"score_astronomy":91,"score_weather":null,"transit_alt":50.2,"transit_local":"00:25","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":6.42,"best_label":"good","best_window":"21:45\u201304:10","dark_hours":7.36,"date":"2035-04-14","moon_free_dark_hours":2.6,"moon_illumination":48,"moon_separation":74.0,"score":null,"score_astronomy":87,"score_weather":null,"transit_alt":50.2,"transit_local":"00:20","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":6.0,"best_label":"good","best_window":"22:10\u201304:10","dark_hours":7.3,"date":"2035-04-15","moon_free_dark_hours":1.78,"moon_illumination":59,"moon_separation":60.1,"score":null,"score_astronomy":82,"score_weather":null,"transit_alt":50.2,"transit_local":"00:15","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":1.83,"best_label":"good","best_window":"01:35\u201303:25","dark_hours":7.25,"date":"2035-04-16","moon_free_dark_hours":1.07,"moon_illumination":70,"moon_separation":46.5,"score":null,"score_astronomy":65,"score_weather":null,"transit_alt":50.2,"transit_local":"00:15","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":6.67,"best_label":"marginal","best_window":"21:45\u201304:25","dark_hours":7.19,"date":"2035-04-17","moon_free_dark_hours":0.42,"moon_illumination":79,"moon_separation":33.2,"score":null,"score_astronomy":39,"score_weather":null,"transit_alt":50.2,"transit_local":"00:10","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":6.33,"best_label":"marginal","best_window":"21:50\u201304:10","dark_hours":7.13,"date":"2035-04-18","moon_free_dark_hours":0.0,"moon_illumination":87,"moon_separation":20.1,"score":null,"score_astronomy":28,"score_weather":null,"transit_alt":50.2,"transit_local":"00:05","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":6.08,"best_label":"marginal","best_window":"21:50\u201303:55","dark_hours":7.07,"date":"2035-04-19","moon_free_dark_hours":0.0,"moon_illumination":93,"moon_separation":7.5,"score":null,"score_astronomy":22,"score_weather":null,"transit_alt":50.2,"transit_local":"00:00","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":5.75,"best_label":"marginal","best_window":"21:50\u201303:35","dark_hours":7.01,"date":"2035-04-20","moon_free_dark_hours":0.0,"moon_illumination":97,"moon_separation":6.5,"score":null,"score_astronomy":18,"score_weather":null,"transit_alt":50.2,"transit_local":"23:55","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":5.42,"best_label":"marginal","best_window":"21:55\u201303:20","dark_hours":6.96,"date":"2035-04-21","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":18.6,"score":null,"score_astronomy":20,"score_weather":null,"transit_alt":50.2,"transit_local":"23:55","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":5.33,"best_label":"marginal","best_window":"21:55\u201303:15","dark_hours":6.9,"date":"2035-04-22","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":30.9,"score":null,"score_astronomy":25,"score_weather":null,"transit_alt":50.2,"transit_local":"23:50","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":5.58,"best_label":"marginal","best_window":"21:55\u201303:30","dark_hours":6.84,"date":"2035-04-23","moon_free_dark_hours":0.0,"moon_illumination":98,"moon_separation":43.1,"score":null,"score_astronomy":39,"score_weather":null,"transit_alt":50.2,"transit_local":"23:45","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":1.42,"best_label":"good","best_window":"22:00\u201323:25","dark_hours":6.78,"date":"2035-04-24","moon_free_dark_hours":0.17,"moon_illumination":94,"moon_separation":55.1,"score":null,"score_astronomy":79,"score_weather":null,"transit_alt":50.2,"transit_local":"23:40","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":3.5,"best_label":"good","best_window":"22:00\u201301:30","dark_hours":6.72,"date":"2035-04-25","moon_free_dark_hours":1.05,"moon_illumination":90,"moon_separation":67.0,"score":null,"score_astronomy":93,"score_weather":null,"transit_alt":50.2,"transit_local":"23:35","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":4.75,"best_label":"good","best_window":"22:00\u201302:45","dark_hours":6.67,"date":"2035-04-26","moon_free_dark_hours":1.9,"moon_illumination":83,"moon_separation":78.8,"score":null,"score_astronomy":93,"score_weather":null,"transit_alt":50.2,"transit_local":"23:35","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":4.92,"best_label":"good","best_window":"22:05\u201303:00","dark_hours":6.61,"date":"2035-04-27","moon_free_dark_hours":2.68,"moon_illumination":75,"moon_separation":90.6,"score":null,"score_astronomy":93,"score_weather":null,"transit_alt":50.2,"transit_local":"23:30","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":5.0,"best_label":"good","best_window":"22:05\u201303:05","dark_hours":6.55,"date":"2035-04-28","moon_free_dark_hours":3.42,"moon_illumination":67,"moon_separation":102.5,"score":null,"score_astronomy":93,"score_weather":null,"transit_alt":50.2,"transit_local":"23:25","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":5.0,"best_label":"good","best_window":"22:05\u201303:05","dark_hours":6.49,"date":"2035-04-29","moon_free_dark_hours":4.07,"moon_illumination":57,"moon_separation":114.5,"score":null,"score_astronomy":93,"score_weather":null,"transit_alt":50.2,"transit_local":"23:20","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":4.92,"best_label":"good","best_window":"22:10\u201303:05","dark_hours":6.43,"date":"2035-04-30","moon_free_dark_hours":4.67,"moon_illumination":48,"moon_separation":126.6,"score":null,"score_astronomy":93,"score_weather":null,"transit_alt":50.2,"transit_local":"23:20","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":4.92,"best_label":"good","best_window":"22:10\u201303:05","dark_hours":6.37,"date":"2035-05-01","moon_free_dark_hours":5.23,"moon_illumination":38,"moon_separation":139.0,"score":null,"score_astronomy":93,"score_weather":null,"transit_alt":50.2,"transit_local":"23:15","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":"2035-04-02","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}}