{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":6.97,"date":"2044-04-20","moon_free_dark_hours":5.73,"moon_illumination":46,"moon_separation":127.4,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":42.9,"transit_local":"17:00","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":6.91,"date":"2044-04-21","moon_free_dark_hours":6.13,"moon_illumination":36,"moon_separation":118.2,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":42.9,"transit_local":"16:55","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":6.85,"date":"2044-04-22","moon_free_dark_hours":6.5,"moon_illumination":27,"moon_separation":108.2,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":42.9,"transit_local":"16:55","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":6.79,"date":"2044-04-23","moon_free_dark_hours":6.77,"moon_illumination":18,"moon_separation":97.6,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":42.9,"transit_local":"16:50","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":6.73,"date":"2044-04-24","moon_free_dark_hours":6.72,"moon_illumination":11,"moon_separation":86.5,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":42.9,"transit_local":"16:45","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":6.67,"date":"2044-04-25","moon_free_dark_hours":6.65,"moon_illumination":5,"moon_separation":75.1,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":42.9,"transit_local":"16:40","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":6.62,"date":"2044-04-26","moon_free_dark_hours":6.6,"moon_illumination":1,"moon_separation":63.7,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":42.9,"transit_local":"16:40","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":6.56,"date":"2044-04-27","moon_free_dark_hours":6.55,"moon_illumination":0,"moon_separation":52.8,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":42.9,"transit_local":"16:35","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":6.5,"date":"2044-04-28","moon_free_dark_hours":6.48,"moon_illumination":2,"moon_separation":43.1,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":42.9,"transit_local":"16:30","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":6.44,"date":"2044-04-29","moon_free_dark_hours":5.73,"moon_illumination":6,"moon_separation":36.1,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":42.9,"transit_local":"16:25","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":6.38,"date":"2044-04-30","moon_free_dark_hours":4.45,"moon_illumination":14,"moon_separation":33.8,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":42.9,"transit_local":"16:20","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":6.33,"date":"2044-05-01","moon_free_dark_hours":3.37,"moon_illumination":23,"moon_separation":36.8,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":42.9,"transit_local":"16:20","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":6.27,"date":"2044-05-02","moon_free_dark_hours":2.5,"moon_illumination":33,"moon_separation":44.0,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":42.9,"transit_local":"16:15","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":6.21,"date":"2044-05-03","moon_free_dark_hours":1.83,"moon_illumination":44,"moon_separation":53.4,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":42.9,"transit_local":"16:10","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":6.15,"date":"2044-05-04","moon_free_dark_hours":1.32,"moon_illumination":56,"moon_separation":63.9,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":42.9,"transit_local":"16:05","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":6.1,"date":"2044-05-05","moon_free_dark_hours":0.87,"moon_illumination":66,"moon_separation":74.8,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":42.9,"transit_local":"16:00","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":6.04,"date":"2044-05-06","moon_free_dark_hours":0.48,"moon_illumination":76,"moon_separation":85.7,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":42.9,"transit_local":"16:00","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":5.98,"date":"2044-05-07","moon_free_dark_hours":0.12,"moon_illumination":84,"moon_separation":96.5,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":42.9,"transit_local":"15:55","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":5.93,"date":"2044-05-08","moon_free_dark_hours":0.0,"moon_illumination":91,"moon_separation":107.0,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":42.9,"transit_local":"15:50","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":5.87,"date":"2044-05-09","moon_free_dark_hours":0.0,"moon_illumination":96,"moon_separation":117.1,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":42.9,"transit_local":"15:45","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":5.81,"date":"2044-05-10","moon_free_dark_hours":0.0,"moon_illumination":99,"moon_separation":126.4,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":42.9,"transit_local":"15:45","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":5.76,"date":"2044-05-11","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":134.7,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":42.9,"transit_local":"15:40","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":5.7,"date":"2044-05-12","moon_free_dark_hours":0.0,"moon_illumination":99,"moon_separation":141.4,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":42.9,"transit_local":"15:35","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":5.65,"date":"2044-05-13","moon_free_dark_hours":0.13,"moon_illumination":96,"moon_separation":145.4,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":42.9,"transit_local":"15:30","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":5.6,"date":"2044-05-14","moon_free_dark_hours":1.05,"moon_illumination":92,"moon_separation":146.1,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":42.9,"transit_local":"15:25","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":5.54,"date":"2044-05-15","moon_free_dark_hours":1.83,"moon_illumination":86,"moon_separation":143.3,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":42.9,"transit_local":"15:25","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":5.49,"date":"2044-05-16","moon_free_dark_hours":2.48,"moon_illumination":79,"moon_separation":137.7,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":42.9,"transit_local":"15:20","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":5.44,"date":"2044-05-17","moon_free_dark_hours":3.0,"moon_illumination":71,"moon_separation":130.1,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":42.9,"transit_local":"15:15","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":5.39,"date":"2044-05-18","moon_free_dark_hours":3.43,"moon_illumination":62,"moon_separation":121.4,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":42.9,"transit_local":"15:10","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":5.34,"date":"2044-05-19","moon_free_dark_hours":3.8,"moon_illumination":52,"moon_separation":111.8,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":42.9,"transit_local":"15:05","verdict":"unknown","weather_source":"none","weekday":"Thu"}],"note":"score_astronomy for every night; score_weather/score only where a forecast (next 4 days) or ERA5 history exists \u2014 null otherwise","start":"2044-04-20","target":{"common_name":"Great Orion Nebula","dec":-5.3876,"name":"M 42","ra":83.8201,"simbad_url":"https://simbad.cds.unistra.fr/simbad/sim-id?Ident=M42","source":"sesame","type":"HII","type_text":"HII region \u2014 a star-forming nebula"}}