{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":2.5,"best_label":"good","best_window":"02:40\u201305:10","dark_hours":7.46,"date":"2042-04-12","moon_free_dark_hours":5.57,"moon_illumination":56,"moon_separation":75.7,"score":null,"score_astronomy":48,"score_weather":null,"transit_alt":87.3,"transit_local":"08:55","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":2.5,"best_label":"good","best_window":"02:35\u201305:05","dark_hours":7.4,"date":"2042-04-13","moon_free_dark_hours":6.27,"moon_illumination":45,"moon_separation":70.4,"score":null,"score_astronomy":54,"score_weather":null,"transit_alt":87.3,"transit_local":"08:50","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":2.58,"best_label":"good","best_window":"02:30\u201305:05","dark_hours":7.34,"date":"2042-04-14","moon_free_dark_hours":6.85,"moon_illumination":34,"moon_separation":65.9,"score":null,"score_astronomy":60,"score_weather":null,"transit_alt":87.2,"transit_local":"08:45","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":2.5,"best_label":"good","best_window":"02:30\u201305:00","dark_hours":7.29,"date":"2042-04-15","moon_free_dark_hours":7.27,"moon_illumination":24,"moon_separation":62.6,"score":null,"score_astronomy":64,"score_weather":null,"transit_alt":87.3,"transit_local":"08:45","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":2.58,"best_label":"good","best_window":"02:25\u201305:00","dark_hours":7.23,"date":"2042-04-16","moon_free_dark_hours":7.22,"moon_illumination":14,"moon_separation":61.2,"score":null,"score_astronomy":65,"score_weather":null,"transit_alt":87.3,"transit_local":"08:40","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":2.67,"best_label":"good","best_window":"02:20\u201305:00","dark_hours":7.17,"date":"2042-04-17","moon_free_dark_hours":7.15,"moon_illumination":7,"moon_separation":61.8,"score":null,"score_astronomy":67,"score_weather":null,"transit_alt":87.3,"transit_local":"08:35","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":2.67,"best_label":"good","best_window":"02:15\u201304:55","dark_hours":7.11,"date":"2042-04-18","moon_free_dark_hours":7.1,"moon_illumination":2,"moon_separation":64.4,"score":null,"score_astronomy":68,"score_weather":null,"transit_alt":87.3,"transit_local":"08:30","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":2.67,"best_label":"good","best_window":"02:15\u201304:55","dark_hours":7.05,"date":"2042-04-19","moon_free_dark_hours":7.03,"moon_illumination":0,"moon_separation":68.9,"score":null,"score_astronomy":68,"score_weather":null,"transit_alt":87.2,"transit_local":"08:30","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":2.67,"best_label":"good","best_window":"02:10\u201304:50","dark_hours":7.0,"date":"2042-04-20","moon_free_dark_hours":6.98,"moon_illumination":1,"moon_separation":74.7,"score":null,"score_astronomy":69,"score_weather":null,"transit_alt":87.3,"transit_local":"08:25","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":2.75,"best_label":"good","best_window":"02:05\u201304:50","dark_hours":6.94,"date":"2042-04-21","moon_free_dark_hours":6.67,"moon_illumination":5,"moon_separation":81.2,"score":null,"score_astronomy":71,"score_weather":null,"transit_alt":87.3,"transit_local":"08:20","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":2.83,"best_label":"good","best_window":"02:00\u201304:50","dark_hours":6.88,"date":"2042-04-22","moon_free_dark_hours":5.33,"moon_illumination":11,"moon_separation":88.1,"score":null,"score_astronomy":72,"score_weather":null,"transit_alt":87.3,"transit_local":"08:15","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":2.83,"best_label":"good","best_window":"01:55\u201304:45","dark_hours":6.82,"date":"2042-04-23","moon_free_dark_hours":4.1,"moon_illumination":19,"moon_separation":94.8,"score":null,"score_astronomy":72,"score_weather":null,"transit_alt":87.2,"transit_local":"08:10","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":2.83,"best_label":"good","best_window":"01:55\u201304:45","dark_hours":6.76,"date":"2042-04-24","moon_free_dark_hours":3.05,"moon_illumination":28,"moon_separation":101.0,"score":null,"score_astronomy":73,"score_weather":null,"transit_alt":87.2,"transit_local":"08:10","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":2.75,"best_label":"good","best_window":"01:55\u201304:40","dark_hours":6.71,"date":"2042-04-25","moon_free_dark_hours":2.2,"moon_illumination":38,"moon_separation":106.7,"score":null,"score_astronomy":72,"score_weather":null,"transit_alt":87.3,"transit_local":"08:05","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":2.83,"best_label":"good","best_window":"01:50\u201304:40","dark_hours":6.65,"date":"2042-04-26","moon_free_dark_hours":1.53,"moon_illumination":48,"moon_separation":111.4,"score":null,"score_astronomy":73,"score_weather":null,"transit_alt":87.3,"transit_local":"08:00","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":2.83,"best_label":"good","best_window":"01:50\u201304:40","dark_hours":6.59,"date":"2042-04-27","moon_free_dark_hours":1.0,"moon_illumination":58,"moon_separation":115.1,"score":null,"score_astronomy":74,"score_weather":null,"transit_alt":87.3,"transit_local":"07:55","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":2.83,"best_label":"good","best_window":"01:45\u201304:35","dark_hours":6.53,"date":"2042-04-28","moon_free_dark_hours":0.55,"moon_illumination":68,"moon_separation":117.6,"score":null,"score_astronomy":73,"score_weather":null,"transit_alt":87.2,"transit_local":"07:50","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":2.83,"best_label":"good","best_window":"01:45\u201304:35","dark_hours":6.47,"date":"2042-04-29","moon_free_dark_hours":0.17,"moon_illumination":76,"moon_separation":118.8,"score":null,"score_astronomy":73,"score_weather":null,"transit_alt":87.3,"transit_local":"07:50","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":2.92,"best_label":"good","best_window":"01:40\u201304:35","dark_hours":6.41,"date":"2042-04-30","moon_free_dark_hours":0.0,"moon_illumination":84,"moon_separation":118.6,"score":null,"score_astronomy":68,"score_weather":null,"transit_alt":87.3,"transit_local":"07:45","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":2.83,"best_label":"good","best_window":"01:40\u201304:30","dark_hours":6.36,"date":"2042-05-01","moon_free_dark_hours":0.0,"moon_illumination":90,"moon_separation":117.2,"score":null,"score_astronomy":66,"score_weather":null,"transit_alt":87.3,"transit_local":"07:40","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":2.83,"best_label":"good","best_window":"01:40\u201304:30","dark_hours":6.3,"date":"2042-05-02","moon_free_dark_hours":0.0,"moon_illumination":95,"moon_separation":114.5,"score":null,"score_astronomy":64,"score_weather":null,"transit_alt":87.3,"transit_local":"07:35","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":2.75,"best_label":"good","best_window":"01:40\u201304:25","dark_hours":6.24,"date":"2042-05-03","moon_free_dark_hours":0.0,"moon_illumination":98,"moon_separation":110.7,"score":null,"score_astronomy":60,"score_weather":null,"transit_alt":87.2,"transit_local":"07:35","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":2.75,"best_label":"good","best_window":"01:40\u201304:25","dark_hours":6.18,"date":"2042-05-04","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":106.1,"score":null,"score_astronomy":57,"score_weather":null,"transit_alt":87.3,"transit_local":"07:30","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":2.83,"best_label":"good","best_window":"01:35\u201304:25","dark_hours":6.13,"date":"2042-05-05","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":100.8,"score":null,"score_astronomy":55,"score_weather":null,"transit_alt":87.3,"transit_local":"07:25","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":2.75,"best_label":"good","best_window":"01:35\u201304:20","dark_hours":6.07,"date":"2042-05-06","moon_free_dark_hours":0.0,"moon_illumination":97,"moon_separation":95.1,"score":null,"score_astronomy":52,"score_weather":null,"transit_alt":87.3,"transit_local":"07:20","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":2.83,"best_label":"good","best_window":"01:30\u201304:20","dark_hours":6.01,"date":"2042-05-07","moon_free_dark_hours":0.88,"moon_illumination":93,"moon_separation":89.0,"score":null,"score_astronomy":51,"score_weather":null,"transit_alt":87.2,"transit_local":"07:15","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":2.92,"best_label":"good","best_window":"01:25\u201304:20","dark_hours":5.96,"date":"2042-05-08","moon_free_dark_hours":1.92,"moon_illumination":87,"moon_separation":82.9,"score":null,"score_astronomy":52,"score_weather":null,"transit_alt":87.2,"transit_local":"07:15","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":3.0,"best_label":"good","best_window":"01:15\u201304:15","dark_hours":5.9,"date":"2042-05-09","moon_free_dark_hours":2.8,"moon_illumination":79,"moon_separation":77.0,"score":null,"score_astronomy":55,"score_weather":null,"transit_alt":87.3,"transit_local":"07:10","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":3.42,"best_label":"good","best_window":"00:50\u201304:15","dark_hours":5.84,"date":"2042-05-10","moon_free_dark_hours":3.55,"moon_illumination":70,"moon_separation":71.6,"score":null,"score_astronomy":66,"score_weather":null,"transit_alt":87.3,"transit_local":"07:05","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":3.5,"best_label":"good","best_window":"00:45\u201304:15","dark_hours":5.79,"date":"2042-05-11","moon_free_dark_hours":4.15,"moon_illumination":60,"moon_separation":66.9,"score":null,"score_astronomy":74,"score_weather":null,"transit_alt":87.3,"transit_local":"07:00","verdict":"unknown","weather_source":"none","weekday":"Sun"}],"note":"score_astronomy for every night; score_weather/score only where a forecast (next 4 days) or ERA5 history exists \u2014 null otherwise","start":"2042-04-12","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}}