{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":3.33,"best_label":"good","best_window":"00:50\u201304:10","dark_hours":5.68,"date":"2030-05-13","moon_free_dark_hours":0.52,"moon_illumination":82,"moon_separation":124.2,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":87.3,"transit_local":"06:55","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":3.33,"best_label":"good","best_window":"00:50\u201304:10","dark_hours":5.63,"date":"2030-05-14","moon_free_dark_hours":0.0,"moon_illumination":90,"moon_separation":118.9,"score":null,"score_astronomy":82,"score_weather":null,"transit_alt":87.3,"transit_local":"06:50","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":3.25,"best_label":"good","best_window":"00:50\u201304:05","dark_hours":5.58,"date":"2030-05-15","moon_free_dark_hours":0.0,"moon_illumination":96,"moon_separation":111.7,"score":null,"score_astronomy":74,"score_weather":null,"transit_alt":87.3,"transit_local":"06:45","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":3.25,"best_label":"good","best_window":"00:50\u201304:05","dark_hours":5.52,"date":"2030-05-16","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":103.3,"score":null,"score_astronomy":66,"score_weather":null,"transit_alt":87.3,"transit_local":"06:40","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":3.17,"best_label":"good","best_window":"00:55\u201304:05","dark_hours":5.47,"date":"2030-05-17","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":94.1,"score":null,"score_astronomy":59,"score_weather":null,"transit_alt":87.3,"transit_local":"06:40","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":2.75,"best_label":"good","best_window":"01:15\u201304:00","dark_hours":5.42,"date":"2030-05-18","moon_free_dark_hours":0.0,"moon_illumination":97,"moon_separation":84.8,"score":null,"score_astronomy":53,"score_weather":null,"transit_alt":87.3,"transit_local":"06:35","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":2.75,"best_label":"good","best_window":"01:15\u201304:00","dark_hours":5.37,"date":"2030-05-19","moon_free_dark_hours":0.57,"moon_illumination":91,"moon_separation":75.9,"score":null,"score_astronomy":50,"score_weather":null,"transit_alt":87.3,"transit_local":"06:30","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":3.25,"best_label":"good","best_window":"00:45\u201304:00","dark_hours":5.32,"date":"2030-05-20","moon_free_dark_hours":1.38,"moon_illumination":83,"moon_separation":67.8,"score":null,"score_astronomy":51,"score_weather":null,"transit_alt":87.3,"transit_local":"06:25","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":3.92,"best_label":"good","best_window":"00:05\u201304:00","dark_hours":5.27,"date":"2030-05-21","moon_free_dark_hours":2.02,"moon_illumination":74,"moon_separation":61.0,"score":null,"score_astronomy":65,"score_weather":null,"transit_alt":87.3,"transit_local":"06:20","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":3.83,"best_label":"good","best_window":"00:05\u201303:55","dark_hours":5.22,"date":"2030-05-22","moon_free_dark_hours":2.55,"moon_illumination":64,"moon_separation":55.9,"score":null,"score_astronomy":72,"score_weather":null,"transit_alt":87.3,"transit_local":"06:20","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":3.92,"best_label":"good","best_window":"00:00\u201303:55","dark_hours":5.17,"date":"2030-05-23","moon_free_dark_hours":3.03,"moon_illumination":53,"moon_separation":52.9,"score":null,"score_astronomy":81,"score_weather":null,"transit_alt":87.3,"transit_local":"06:15","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":4.0,"best_label":"good","best_window":"23:55\u201303:55","dark_hours":5.13,"date":"2030-05-24","moon_free_dark_hours":3.43,"moon_illumination":43,"moon_separation":52.2,"score":null,"score_astronomy":90,"score_weather":null,"transit_alt":87.3,"transit_local":"06:10","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":4.08,"best_label":"good","best_window":"23:50\u201303:55","dark_hours":5.08,"date":"2030-05-25","moon_free_dark_hours":3.85,"moon_illumination":33,"moon_separation":53.6,"score":null,"score_astronomy":95,"score_weather":null,"transit_alt":87.3,"transit_local":"06:05","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":4.08,"best_label":"good","best_window":"23:45\u201303:50","dark_hours":5.04,"date":"2030-05-26","moon_free_dark_hours":4.25,"moon_illumination":24,"moon_separation":56.9,"score":null,"score_astronomy":98,"score_weather":null,"transit_alt":87.3,"transit_local":"06:00","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":4.08,"best_label":"good","best_window":"23:45\u201303:50","dark_hours":4.99,"date":"2030-05-27","moon_free_dark_hours":4.67,"moon_illumination":16,"moon_separation":61.6,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.3,"transit_local":"06:00","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":4.17,"best_label":"good","best_window":"23:40\u201303:50","dark_hours":4.95,"date":"2030-05-28","moon_free_dark_hours":4.93,"moon_illumination":10,"moon_separation":67.3,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.3,"transit_local":"05:55","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":4.25,"best_label":"good","best_window":"23:35\u201303:50","dark_hours":4.91,"date":"2030-05-29","moon_free_dark_hours":4.88,"moon_illumination":5,"moon_separation":73.8,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.3,"transit_local":"05:50","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":4.25,"best_label":"good","best_window":"23:30\u201303:45","dark_hours":4.87,"date":"2030-05-30","moon_free_dark_hours":4.85,"moon_illumination":2,"moon_separation":80.7,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.3,"transit_local":"05:45","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":4.25,"best_label":"good","best_window":"23:30\u201303:45","dark_hours":4.83,"date":"2030-05-31","moon_free_dark_hours":4.82,"moon_illumination":0,"moon_separation":87.9,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.3,"transit_local":"05:40","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":4.33,"best_label":"good","best_window":"23:25\u201303:45","dark_hours":4.79,"date":"2030-06-01","moon_free_dark_hours":4.77,"moon_illumination":0,"moon_separation":95.2,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.3,"transit_local":"05:40","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":4.42,"best_label":"good","best_window":"23:20\u201303:45","dark_hours":4.76,"date":"2030-06-02","moon_free_dark_hours":4.73,"moon_illumination":2,"moon_separation":102.3,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.3,"transit_local":"05:35","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":4.5,"best_label":"good","best_window":"23:15\u201303:45","dark_hours":4.73,"date":"2030-06-03","moon_free_dark_hours":4.7,"moon_illumination":6,"moon_separation":109.2,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.3,"transit_local":"05:30","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":4.58,"best_label":"good","best_window":"23:10\u201303:45","dark_hours":4.69,"date":"2030-06-04","moon_free_dark_hours":4.52,"moon_illumination":12,"moon_separation":115.5,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.3,"transit_local":"05:25","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":4.5,"best_label":"good","best_window":"23:10\u201303:40","dark_hours":4.66,"date":"2030-06-05","moon_free_dark_hours":3.95,"moon_illumination":19,"moon_separation":120.9,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.3,"transit_local":"05:25","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":4.58,"best_label":"good","best_window":"23:05\u201303:40","dark_hours":4.63,"date":"2030-06-06","moon_free_dark_hours":3.43,"moon_illumination":28,"moon_separation":125.0,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.3,"transit_local":"05:20","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":4.58,"best_label":"good","best_window":"23:05\u201303:40","dark_hours":4.61,"date":"2030-06-07","moon_free_dark_hours":2.97,"moon_illumination":37,"moon_separation":127.4,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.3,"transit_local":"05:15","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":4.58,"best_label":"good","best_window":"23:05\u201303:40","dark_hours":4.58,"date":"2030-06-08","moon_free_dark_hours":2.5,"moon_illumination":48,"moon_separation":127.7,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.3,"transit_local":"05:10","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":4.58,"best_label":"good","best_window":"23:05\u201303:40","dark_hours":4.56,"date":"2030-06-09","moon_free_dark_hours":2.03,"moon_illumination":58,"moon_separation":125.5,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.3,"transit_local":"05:05","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":4.58,"best_label":"good","best_window":"23:05\u201303:40","dark_hours":4.53,"date":"2030-06-10","moon_free_dark_hours":1.52,"moon_illumination":69,"moon_separation":121.1,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.3,"transit_local":"05:05","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":4.5,"best_label":"good","best_window":"23:10\u201303:40","dark_hours":4.51,"date":"2030-06-11","moon_free_dark_hours":0.95,"moon_illumination":79,"moon_separation":114.8,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":87.3,"transit_local":"05:00","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":"2030-05-13","target":{"dec":44.25788576,"name":"EM* LkHA 190","ra":314.72388973,"simbad_url":"https://simbad.cds.unistra.fr/simbad/sim-id?Ident=V1057%20Cyg","source":"sesame","spectral_type":"F7/G3I/IIe","type":"Or*","type_text":"Orion-type variable \u2014 a young, erupting star","vmag":12.33}}