{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":0.17,"best_label":"marginal","best_window":"20:05\u201320:15","dark_hours":8.83,"date":"2047-03-18","moon_free_dark_hours":6.47,"moon_illumination":47,"moon_separation":120.5,"score":null,"score_astronomy":3,"score_weather":null,"transit_alt":79.2,"transit_local":"14:15","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":0.08,"best_label":"marginal","best_window":"19:35\u201319:40","dark_hours":8.78,"date":"2047-03-19","moon_free_dark_hours":7.18,"moon_illumination":37,"moon_separation":107.7,"score":null,"score_astronomy":2,"score_weather":null,"transit_alt":79.2,"transit_local":"14:10","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":0.08,"best_label":"marginal","best_window":"19:35\u201319:40","dark_hours":8.73,"date":"2047-03-20","moon_free_dark_hours":7.77,"moon_illumination":27,"moon_separation":95.2,"score":null,"score_astronomy":1,"score_weather":null,"transit_alt":79.2,"transit_local":"14:05","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":8.67,"date":"2047-03-21","moon_free_dark_hours":8.25,"moon_illumination":18,"moon_separation":82.9,"score":null,"score_astronomy":1,"score_weather":null,"transit_alt":79.2,"transit_local":"14:00","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":8.62,"date":"2047-03-22","moon_free_dark_hours":8.62,"moon_illumination":12,"moon_separation":70.9,"score":null,"score_astronomy":1,"score_weather":null,"transit_alt":79.2,"transit_local":"14:00","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":8.57,"date":"2047-03-23","moon_free_dark_hours":8.55,"moon_illumination":6,"moon_separation":59.0,"score":null,"score_astronomy":1,"score_weather":null,"transit_alt":79.2,"transit_local":"13:55","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":8.52,"date":"2047-03-24","moon_free_dark_hours":8.5,"moon_illumination":2,"moon_separation":47.5,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.2,"transit_local":"13:50","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":8.46,"date":"2047-03-25","moon_free_dark_hours":8.45,"moon_illumination":0,"moon_separation":36.4,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.2,"transit_local":"13:45","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":8.41,"date":"2047-03-26","moon_free_dark_hours":8.4,"moon_illumination":0,"moon_separation":26.0,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.2,"transit_local":"13:40","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":8.36,"date":"2047-03-27","moon_free_dark_hours":8.33,"moon_illumination":2,"moon_separation":17.5,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.2,"transit_local":"13:40","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":8.3,"date":"2047-03-28","moon_free_dark_hours":7.72,"moon_illumination":6,"moon_separation":14.6,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.2,"transit_local":"13:35","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":8.25,"date":"2047-03-29","moon_free_dark_hours":6.67,"moon_illumination":10,"moon_separation":19.8,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.2,"transit_local":"13:30","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":8.2,"date":"2047-03-30","moon_free_dark_hours":5.65,"moon_illumination":17,"moon_separation":29.1,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.2,"transit_local":"13:25","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":8.14,"date":"2047-03-31","moon_free_dark_hours":4.67,"moon_illumination":25,"moon_separation":39.8,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.2,"transit_local":"14:25","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":8.09,"date":"2047-04-01","moon_free_dark_hours":3.73,"moon_illumination":33,"moon_separation":51.1,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.2,"transit_local":"14:20","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":8.03,"date":"2047-04-02","moon_free_dark_hours":2.9,"moon_illumination":43,"moon_separation":62.9,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.2,"transit_local":"14:15","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":7.98,"date":"2047-04-03","moon_free_dark_hours":2.17,"moon_illumination":53,"moon_separation":75.2,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.2,"transit_local":"14:10","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":7.92,"date":"2047-04-04","moon_free_dark_hours":1.53,"moon_illumination":63,"moon_separation":87.8,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.2,"transit_local":"14:05","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":7.87,"date":"2047-04-05","moon_free_dark_hours":0.97,"moon_illumination":74,"moon_separation":100.9,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.2,"transit_local":"14:05","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":7.81,"date":"2047-04-06","moon_free_dark_hours":0.47,"moon_illumination":83,"moon_separation":114.4,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.2,"transit_local":"14:00","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":7.75,"date":"2047-04-07","moon_free_dark_hours":0.0,"moon_illumination":91,"moon_separation":128.3,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.2,"transit_local":"13:55","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":7.7,"date":"2047-04-08","moon_free_dark_hours":0.0,"moon_illumination":96,"moon_separation":142.2,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.2,"transit_local":"13:50","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":7.64,"date":"2047-04-09","moon_free_dark_hours":0.0,"moon_illumination":99,"moon_separation":155.3,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.2,"transit_local":"13:45","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":7.58,"date":"2047-04-10","moon_free_dark_hours":0.0,"moon_illumination":99,"moon_separation":164.7,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.2,"transit_local":"13:45","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":7.53,"date":"2047-04-11","moon_free_dark_hours":0.23,"moon_illumination":96,"moon_separation":162.3,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.2,"transit_local":"13:40","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":7.47,"date":"2047-04-12","moon_free_dark_hours":1.52,"moon_illumination":91,"moon_separation":151.0,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.2,"transit_local":"13:35","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":7.41,"date":"2047-04-13","moon_free_dark_hours":2.72,"moon_illumination":83,"moon_separation":137.9,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.2,"transit_local":"13:30","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":7.36,"date":"2047-04-14","moon_free_dark_hours":3.7,"moon_illumination":73,"moon_separation":124.4,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.2,"transit_local":"13:25","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":7.3,"date":"2047-04-15","moon_free_dark_hours":4.52,"moon_illumination":63,"moon_separation":111.2,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.2,"transit_local":"13:25","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":7.24,"date":"2047-04-16","moon_free_dark_hours":5.15,"moon_illumination":52,"moon_separation":98.4,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.2,"transit_local":"13:20","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":"2047-03-18","target":{"common_name":"Triangulum Pinwheel","dec":30.66017511,"morphology":"SA(s)cd","name":"M 33","ra":23.46206906,"simbad_url":"https://simbad.cds.unistra.fr/simbad/sim-id?Ident=M33","source":"sesame","type":"GiG","type_text":"galaxy in a group","vmag":5.72}}