{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":0.42,"best_label":"marginal","best_window":"04:05\u201304:30","dark_hours":4.47,"date":"2031-06-14","moon_free_dark_hours":3.67,"moon_illumination":22,"moon_separation":17.5,"score":null,"score_astronomy":5,"score_weather":null,"transit_alt":79.1,"transit_local":"09:25","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":0.5,"best_label":"marginal","best_window":"04:00\u201304:30","dark_hours":4.46,"date":"2031-06-15","moon_free_dark_hours":4.23,"moon_illumination":14,"moon_separation":19.0,"score":null,"score_astronomy":5,"score_weather":null,"transit_alt":79.1,"transit_local":"09:20","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":0.67,"best_label":"marginal","best_window":"03:50\u201304:30","dark_hours":4.44,"date":"2031-06-16","moon_free_dark_hours":4.43,"moon_illumination":8,"moon_separation":26.7,"score":null,"score_astronomy":7,"score_weather":null,"transit_alt":79.1,"transit_local":"09:15","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":0.75,"best_label":"marginal","best_window":"03:45\u201304:30","dark_hours":4.44,"date":"2031-06-17","moon_free_dark_hours":4.43,"moon_illumination":4,"moon_separation":36.7,"score":null,"score_astronomy":8,"score_weather":null,"transit_alt":79.1,"transit_local":"09:10","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":1.33,"best_label":"marginal","best_window":"03:10\u201304:30","dark_hours":4.43,"date":"2031-06-18","moon_free_dark_hours":4.42,"moon_illumination":1,"moon_separation":47.4,"score":null,"score_astronomy":9,"score_weather":null,"transit_alt":79.1,"transit_local":"09:10","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":0.08,"best_label":"good","best_window":"03:35\u201303:40","dark_hours":4.43,"date":"2031-06-19","moon_free_dark_hours":4.42,"moon_illumination":0,"moon_separation":58.5,"score":null,"score_astronomy":10,"score_weather":null,"transit_alt":79.1,"transit_local":"09:05","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":0.17,"best_label":"good","best_window":"03:30\u201303:40","dark_hours":4.42,"date":"2031-06-20","moon_free_dark_hours":4.4,"moon_illumination":1,"moon_separation":69.7,"score":null,"score_astronomy":12,"score_weather":null,"transit_alt":79.1,"transit_local":"09:00","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":0.17,"best_label":"good","best_window":"03:30\u201303:40","dark_hours":4.42,"date":"2031-06-21","moon_free_dark_hours":4.4,"moon_illumination":4,"moon_separation":80.9,"score":null,"score_astronomy":13,"score_weather":null,"transit_alt":79.1,"transit_local":"08:55","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":0.25,"best_label":"good","best_window":"03:25\u201303:40","dark_hours":4.42,"date":"2031-06-22","moon_free_dark_hours":4.4,"moon_illumination":8,"moon_separation":92.2,"score":null,"score_astronomy":15,"score_weather":null,"transit_alt":79.1,"transit_local":"08:50","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":0.33,"best_label":"good","best_window":"03:20\u201303:40","dark_hours":4.43,"date":"2031-06-23","moon_free_dark_hours":4.42,"moon_illumination":14,"moon_separation":103.6,"score":null,"score_astronomy":16,"score_weather":null,"transit_alt":79.1,"transit_local":"08:50","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":0.42,"best_label":"good","best_window":"03:15\u201303:40","dark_hours":4.43,"date":"2031-06-24","moon_free_dark_hours":4.25,"moon_illumination":21,"moon_separation":115.0,"score":null,"score_astronomy":17,"score_weather":null,"transit_alt":79.1,"transit_local":"08:45","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":0.42,"best_label":"good","best_window":"03:15\u201303:40","dark_hours":4.44,"date":"2031-06-25","moon_free_dark_hours":3.82,"moon_illumination":30,"moon_separation":126.3,"score":null,"score_astronomy":19,"score_weather":null,"transit_alt":79.1,"transit_local":"08:40","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":0.5,"best_label":"good","best_window":"03:10\u201303:40","dark_hours":4.45,"date":"2031-06-26","moon_free_dark_hours":3.37,"moon_illumination":39,"moon_separation":137.7,"score":null,"score_astronomy":22,"score_weather":null,"transit_alt":79.1,"transit_local":"08:35","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":0.58,"best_label":"good","best_window":"03:05\u201303:40","dark_hours":4.46,"date":"2031-06-27","moon_free_dark_hours":2.92,"moon_illumination":49,"moon_separation":148.6,"score":null,"score_astronomy":23,"score_weather":null,"transit_alt":79.1,"transit_local":"08:30","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":0.67,"best_label":"good","best_window":"03:00\u201303:40","dark_hours":4.48,"date":"2031-06-28","moon_free_dark_hours":2.42,"moon_illumination":60,"moon_separation":158.2,"score":null,"score_astronomy":25,"score_weather":null,"transit_alt":79.1,"transit_local":"08:30","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":0.75,"best_label":"good","best_window":"02:55\u201303:40","dark_hours":4.5,"date":"2031-06-29","moon_free_dark_hours":1.87,"moon_illumination":70,"moon_separation":162.8,"score":null,"score_astronomy":25,"score_weather":null,"transit_alt":79.1,"transit_local":"08:25","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":0.83,"best_label":"good","best_window":"02:55\u201303:45","dark_hours":4.51,"date":"2031-06-30","moon_free_dark_hours":1.22,"moon_illumination":80,"moon_separation":158.2,"score":null,"score_astronomy":28,"score_weather":null,"transit_alt":79.1,"transit_local":"08:20","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":0.83,"best_label":"good","best_window":"02:55\u201303:45","dark_hours":4.53,"date":"2031-07-01","moon_free_dark_hours":0.43,"moon_illumination":88,"moon_separation":147.4,"score":null,"score_astronomy":28,"score_weather":null,"transit_alt":79.1,"transit_local":"08:15","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":0.83,"best_label":"good","best_window":"02:55\u201303:45","dark_hours":4.56,"date":"2031-07-02","moon_free_dark_hours":0.0,"moon_illumination":95,"moon_separation":134.4,"score":null,"score_astronomy":26,"score_weather":null,"transit_alt":79.1,"transit_local":"08:15","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":0.92,"best_label":"good","best_window":"02:50\u201303:45","dark_hours":4.58,"date":"2031-07-03","moon_free_dark_hours":0.0,"moon_illumination":99,"moon_separation":120.5,"score":null,"score_astronomy":26,"score_weather":null,"transit_alt":79.1,"transit_local":"08:10","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":0.83,"best_label":"good","best_window":"02:55\u201303:45","dark_hours":4.6,"date":"2031-07-04","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":106.0,"score":null,"score_astronomy":23,"score_weather":null,"transit_alt":79.1,"transit_local":"08:05","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":0.42,"best_label":"good","best_window":"03:20\u201303:45","dark_hours":4.63,"date":"2031-07-05","moon_free_dark_hours":0.0,"moon_illumination":98,"moon_separation":91.5,"score":null,"score_astronomy":19,"score_weather":null,"transit_alt":79.1,"transit_local":"08:00","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":1.67,"best_label":"marginal","best_window":"02:10\u201303:50","dark_hours":4.66,"date":"2031-07-06","moon_free_dark_hours":0.0,"moon_illumination":93,"moon_separation":77.1,"score":null,"score_astronomy":16,"score_weather":null,"transit_alt":79.1,"transit_local":"07:55","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":1.67,"best_label":"marginal","best_window":"02:10\u201303:50","dark_hours":4.69,"date":"2031-07-07","moon_free_dark_hours":0.0,"moon_illumination":86,"moon_separation":63.1,"score":null,"score_astronomy":15,"score_weather":null,"transit_alt":79.1,"transit_local":"07:55","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":1.75,"best_label":"marginal","best_window":"02:05\u201303:50","dark_hours":4.72,"date":"2031-07-08","moon_free_dark_hours":0.2,"moon_illumination":77,"moon_separation":49.7,"score":null,"score_astronomy":14,"score_weather":null,"transit_alt":79.1,"transit_local":"07:50","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":1.92,"best_label":"marginal","best_window":"01:55\u201303:50","dark_hours":4.76,"date":"2031-07-09","moon_free_dark_hours":0.73,"moon_illumination":66,"moon_separation":37.2,"score":null,"score_astronomy":15,"score_weather":null,"transit_alt":79.1,"transit_local":"07:45","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":2.08,"best_label":"marginal","best_window":"01:50\u201303:55","dark_hours":4.79,"date":"2031-07-10","moon_free_dark_hours":1.27,"moon_illumination":56,"moon_separation":26.3,"score":null,"score_astronomy":19,"score_weather":null,"transit_alt":79.1,"transit_local":"07:40","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":1.33,"best_label":"good","best_window":"02:35\u201303:55","dark_hours":4.83,"date":"2031-07-11","moon_free_dark_hours":1.82,"moon_illumination":45,"moon_separation":18.6,"score":null,"score_astronomy":25,"score_weather":null,"transit_alt":79.1,"transit_local":"07:35","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":1.5,"best_label":"good","best_window":"02:25\u201303:55","dark_hours":4.87,"date":"2031-07-12","moon_free_dark_hours":2.38,"moon_illumination":36,"moon_separation":18.1,"score":null,"score_astronomy":32,"score_weather":null,"transit_alt":79.1,"transit_local":"07:35","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":1.75,"best_label":"good","best_window":"02:10\u201303:55","dark_hours":4.91,"date":"2031-07-13","moon_free_dark_hours":3.02,"moon_illumination":26,"moon_separation":24.7,"score":null,"score_astronomy":39,"score_weather":null,"transit_alt":79.1,"transit_local":"07:30","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":"2031-06-14","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}}