{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":5.73,"date":"2042-05-12","moon_free_dark_hours":4.63,"moon_illumination":49,"moon_separation":72.3,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.2,"transit_local":"11:30","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":5.68,"date":"2042-05-13","moon_free_dark_hours":5.07,"moon_illumination":37,"moon_separation":59.1,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.2,"transit_local":"11:30","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":5.62,"date":"2042-05-14","moon_free_dark_hours":5.43,"moon_illumination":27,"moon_separation":46.1,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.2,"transit_local":"11:25","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":5.57,"date":"2042-05-15","moon_free_dark_hours":5.55,"moon_illumination":17,"moon_separation":33.5,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.2,"transit_local":"11:20","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":5.52,"date":"2042-05-16","moon_free_dark_hours":5.5,"moon_illumination":9,"moon_separation":23.0,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.2,"transit_local":"11:15","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":5.47,"date":"2042-05-17","moon_free_dark_hours":5.45,"moon_illumination":3,"moon_separation":18.7,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.2,"transit_local":"11:15","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":5.41,"date":"2042-05-18","moon_free_dark_hours":5.4,"moon_illumination":0,"moon_separation":24.4,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.2,"transit_local":"11:10","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":5.36,"date":"2042-05-19","moon_free_dark_hours":5.35,"moon_illumination":0,"moon_separation":35.3,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.2,"transit_local":"11:05","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":5.31,"date":"2042-05-20","moon_free_dark_hours":5.28,"moon_illumination":3,"moon_separation":47.8,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.2,"transit_local":"11:00","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":5.26,"date":"2042-05-21","moon_free_dark_hours":4.57,"moon_illumination":8,"moon_separation":60.6,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.2,"transit_local":"10:55","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":5.22,"date":"2042-05-22","moon_free_dark_hours":3.62,"moon_illumination":15,"moon_separation":73.2,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.2,"transit_local":"10:55","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":5.17,"date":"2042-05-23","moon_free_dark_hours":2.85,"moon_illumination":23,"moon_separation":85.6,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.2,"transit_local":"10:50","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":5.12,"date":"2042-05-24","moon_free_dark_hours":2.25,"moon_illumination":32,"moon_separation":97.6,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.2,"transit_local":"10:45","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":5.08,"date":"2042-05-25","moon_free_dark_hours":1.78,"moon_illumination":42,"moon_separation":109.3,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.2,"transit_local":"10:40","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":5.03,"date":"2042-05-26","moon_free_dark_hours":1.38,"moon_illumination":52,"moon_separation":120.6,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.2,"transit_local":"10:35","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.99,"date":"2042-05-27","moon_free_dark_hours":1.02,"moon_illumination":61,"moon_separation":131.6,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.2,"transit_local":"10:35","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.95,"date":"2042-05-28","moon_free_dark_hours":0.7,"moon_illumination":70,"moon_separation":142.0,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.2,"transit_local":"10:30","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.91,"date":"2042-05-29","moon_free_dark_hours":0.37,"moon_illumination":78,"moon_separation":151.6,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.2,"transit_local":"10:25","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.87,"date":"2042-05-30","moon_free_dark_hours":0.03,"moon_illumination":86,"moon_separation":158.9,"score":null,"score_astronomy":1,"score_weather":null,"transit_alt":79.2,"transit_local":"10:20","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.83,"date":"2042-05-31","moon_free_dark_hours":0.0,"moon_illumination":92,"moon_separation":161.2,"score":null,"score_astronomy":1,"score_weather":null,"transit_alt":79.2,"transit_local":"10:20","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.79,"date":"2042-06-01","moon_free_dark_hours":0.0,"moon_illumination":96,"moon_separation":156.7,"score":null,"score_astronomy":1,"score_weather":null,"transit_alt":79.2,"transit_local":"10:15","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.76,"date":"2042-06-02","moon_free_dark_hours":0.0,"moon_illumination":99,"moon_separation":147.8,"score":null,"score_astronomy":1,"score_weather":null,"transit_alt":79.2,"transit_local":"10:10","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.72,"date":"2042-06-03","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":137.1,"score":null,"score_astronomy":1,"score_weather":null,"transit_alt":79.2,"transit_local":"10:05","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.69,"date":"2042-06-04","moon_free_dark_hours":0.0,"moon_illumination":99,"moon_separation":125.5,"score":null,"score_astronomy":1,"score_weather":null,"transit_alt":79.2,"transit_local":"10:00","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.66,"date":"2042-06-05","moon_free_dark_hours":0.07,"moon_illumination":95,"moon_separation":113.4,"score":null,"score_astronomy":1,"score_weather":null,"transit_alt":79.2,"transit_local":"10:00","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.63,"date":"2042-06-06","moon_free_dark_hours":0.88,"moon_illumination":90,"moon_separation":100.8,"score":null,"score_astronomy":1,"score_weather":null,"transit_alt":79.2,"transit_local":"09:55","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.6,"date":"2042-06-07","moon_free_dark_hours":1.53,"moon_illumination":82,"moon_separation":88.1,"score":null,"score_astronomy":1,"score_weather":null,"transit_alt":79.2,"transit_local":"09:50","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.58,"date":"2042-06-08","moon_free_dark_hours":2.07,"moon_illumination":73,"moon_separation":75.1,"score":null,"score_astronomy":1,"score_weather":null,"transit_alt":79.2,"transit_local":"09:45","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.55,"date":"2042-06-09","moon_free_dark_hours":2.52,"moon_illumination":62,"moon_separation":62.1,"score":null,"score_astronomy":1,"score_weather":null,"transit_alt":79.2,"transit_local":"09:40","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.53,"date":"2042-06-10","moon_free_dark_hours":2.9,"moon_illumination":51,"moon_separation":49.2,"score":null,"score_astronomy":2,"score_weather":null,"transit_alt":79.2,"transit_local":"09:40","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":"2042-05-12","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}}