{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":1.08,"best_label":"marginal","best_window":"23:10\u201300:15","dark_hours":4.46,"date":"2035-06-15","moon_free_dark_hours":0.37,"moon_illumination":79,"moon_separation":24.8,"score":null,"score_astronomy":7,"score_weather":null,"transit_alt":50.2,"transit_local":"20:15","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":0.92,"best_label":"marginal","best_window":"23:10\u201300:05","dark_hours":4.44,"date":"2035-06-16","moon_free_dark_hours":0.0,"moon_illumination":87,"moon_separation":36.9,"score":null,"score_astronomy":7,"score_weather":null,"transit_alt":50.2,"transit_local":"20:15","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":0.92,"best_label":"marginal","best_window":"23:10\u201300:05","dark_hours":4.44,"date":"2035-06-17","moon_free_dark_hours":0.0,"moon_illumination":92,"moon_separation":48.9,"score":null,"score_astronomy":7,"score_weather":null,"transit_alt":50.2,"transit_local":"20:10","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":1.0,"best_label":"marginal","best_window":"23:10\u201300:10","dark_hours":4.43,"date":"2035-06-18","moon_free_dark_hours":0.0,"moon_illumination":97,"moon_separation":60.8,"score":null,"score_astronomy":9,"score_weather":null,"transit_alt":50.2,"transit_local":"20:05","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":1.0,"best_label":"marginal","best_window":"23:10\u201300:10","dark_hours":4.43,"date":"2035-06-19","moon_free_dark_hours":0.0,"moon_illumination":99,"moon_separation":72.6,"score":null,"score_astronomy":10,"score_weather":null,"transit_alt":50.2,"transit_local":"20:00","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":1.0,"best_label":"marginal","best_window":"23:15\u201300:15","dark_hours":4.42,"date":"2035-06-20","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":84.5,"score":null,"score_astronomy":11,"score_weather":null,"transit_alt":50.2,"transit_local":"19:55","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":0.08,"best_label":"good","best_window":"23:15\u201323:20","dark_hours":4.42,"date":"2035-06-21","moon_free_dark_hours":0.0,"moon_illumination":99,"moon_separation":96.3,"score":null,"score_astronomy":13,"score_weather":null,"transit_alt":50.2,"transit_local":"19:55","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":0.17,"best_label":"good","best_window":"23:15\u201323:25","dark_hours":4.42,"date":"2035-06-22","moon_free_dark_hours":0.0,"moon_illumination":96,"moon_separation":108.2,"score":null,"score_astronomy":15,"score_weather":null,"transit_alt":50.2,"transit_local":"19:50","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":0.25,"best_label":"good","best_window":"23:15\u201323:30","dark_hours":4.43,"date":"2035-06-23","moon_free_dark_hours":0.0,"moon_illumination":91,"moon_separation":120.1,"score":null,"score_astronomy":15,"score_weather":null,"transit_alt":50.2,"transit_local":"19:45","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":0.17,"best_label":"good","best_window":"23:15\u201323:25","dark_hours":4.43,"date":"2035-06-24","moon_free_dark_hours":0.22,"moon_illumination":85,"moon_separation":132.2,"score":null,"score_astronomy":15,"score_weather":null,"transit_alt":50.2,"transit_local":"19:40","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":0.25,"best_label":"good","best_window":"23:15\u201323:30","dark_hours":4.44,"date":"2035-06-25","moon_free_dark_hours":0.78,"moon_illumination":78,"moon_separation":144.5,"score":null,"score_astronomy":14,"score_weather":null,"transit_alt":50.2,"transit_local":"19:35","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":0.17,"best_label":"good","best_window":"23:15\u201323:25","dark_hours":4.45,"date":"2035-06-26","moon_free_dark_hours":1.32,"moon_illumination":69,"moon_separation":156.9,"score":null,"score_astronomy":13,"score_weather":null,"transit_alt":50.2,"transit_local":"19:35","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":0.08,"best_label":"good","best_window":"23:15\u201323:20","dark_hours":4.47,"date":"2035-06-27","moon_free_dark_hours":1.83,"moon_illumination":59,"moon_separation":169.5,"score":null,"score_astronomy":12,"score_weather":null,"transit_alt":50.2,"transit_local":"19:30","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":1.42,"best_label":"marginal","best_window":"22:20\u201323:45","dark_hours":4.48,"date":"2035-06-28","moon_free_dark_hours":2.35,"moon_illumination":48,"moon_separation":176.3,"score":null,"score_astronomy":11,"score_weather":null,"transit_alt":50.2,"transit_local":"19:25","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":0.08,"best_label":"good","best_window":"23:10\u201323:15","dark_hours":4.5,"date":"2035-06-29","moon_free_dark_hours":2.92,"moon_illumination":38,"moon_separation":163.4,"score":null,"score_astronomy":10,"score_weather":null,"transit_alt":50.2,"transit_local":"19:20","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":1.33,"best_label":"marginal","best_window":"22:20\u201323:40","dark_hours":4.51,"date":"2035-06-30","moon_free_dark_hours":3.52,"moon_illumination":27,"moon_separation":149.6,"score":null,"score_astronomy":9,"score_weather":null,"transit_alt":50.2,"transit_local":"19:20","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":0.75,"best_label":"marginal","best_window":"22:20\u201323:05","dark_hours":4.53,"date":"2035-07-01","moon_free_dark_hours":4.18,"moon_illumination":17,"moon_separation":135.3,"score":null,"score_astronomy":8,"score_weather":null,"transit_alt":50.2,"transit_local":"19:15","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":0.67,"best_label":"marginal","best_window":"22:20\u201323:00","dark_hours":4.56,"date":"2035-07-02","moon_free_dark_hours":4.53,"moon_illumination":9,"moon_separation":120.5,"score":null,"score_astronomy":7,"score_weather":null,"transit_alt":50.2,"transit_local":"19:10","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":0.67,"best_label":"marginal","best_window":"22:20\u201323:00","dark_hours":4.58,"date":"2035-07-03","moon_free_dark_hours":4.55,"moon_illumination":4,"moon_separation":105.5,"score":null,"score_astronomy":6,"score_weather":null,"transit_alt":50.2,"transit_local":"19:05","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":0.58,"best_label":"marginal","best_window":"22:20\u201322:55","dark_hours":4.61,"date":"2035-07-04","moon_free_dark_hours":4.58,"moon_illumination":0,"moon_separation":90.3,"score":null,"score_astronomy":5,"score_weather":null,"transit_alt":50.2,"transit_local":"19:00","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":0.5,"best_label":"marginal","best_window":"22:20\u201322:50","dark_hours":4.63,"date":"2035-07-05","moon_free_dark_hours":4.62,"moon_illumination":0,"moon_separation":75.2,"score":null,"score_astronomy":5,"score_weather":null,"transit_alt":50.2,"transit_local":"19:00","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":0.42,"best_label":"marginal","best_window":"22:20\u201322:45","dark_hours":4.66,"date":"2035-07-06","moon_free_dark_hours":4.63,"moon_illumination":4,"moon_separation":60.2,"score":null,"score_astronomy":4,"score_weather":null,"transit_alt":50.2,"transit_local":"18:55","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":0.42,"best_label":"marginal","best_window":"22:15\u201322:40","dark_hours":4.69,"date":"2035-07-07","moon_free_dark_hours":4.67,"moon_illumination":9,"moon_separation":45.5,"score":null,"score_astronomy":3,"score_weather":null,"transit_alt":50.2,"transit_local":"18:50","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":0.25,"best_label":"marginal","best_window":"22:15\u201322:30","dark_hours":4.73,"date":"2035-07-08","moon_free_dark_hours":4.68,"moon_illumination":17,"moon_separation":31.2,"score":null,"score_astronomy":3,"score_weather":null,"transit_alt":50.2,"transit_local":"18:45","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":0.08,"best_label":"marginal","best_window":"22:15\u201322:20","dark_hours":4.76,"date":"2035-07-09","moon_free_dark_hours":4.1,"moon_illumination":26,"moon_separation":17.4,"score":null,"score_astronomy":2,"score_weather":null,"transit_alt":50.2,"transit_local":"18:40","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.79,"date":"2035-07-10","moon_free_dark_hours":3.58,"moon_illumination":36,"moon_separation":4.5,"score":null,"score_astronomy":2,"score_weather":null,"transit_alt":50.2,"transit_local":"18:40","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.83,"date":"2035-07-11","moon_free_dark_hours":3.08,"moon_illumination":46,"moon_separation":9.2,"score":null,"score_astronomy":1,"score_weather":null,"transit_alt":50.2,"transit_local":"18:35","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.87,"date":"2035-07-12","moon_free_dark_hours":2.6,"moon_illumination":56,"moon_separation":21.6,"score":null,"score_astronomy":1,"score_weather":null,"transit_alt":50.2,"transit_local":"18:30","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.91,"date":"2035-07-13","moon_free_dark_hours":2.1,"moon_illumination":66,"moon_separation":33.9,"score":null,"score_astronomy":1,"score_weather":null,"transit_alt":50.2,"transit_local":"18:25","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.95,"date":"2035-07-14","moon_free_dark_hours":1.57,"moon_illumination":75,"moon_separation":45.9,"score":null,"score_astronomy":1,"score_weather":null,"transit_alt":50.2,"transit_local":"18:25","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":"2035-06-15","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}}