{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.77,"date":"2039-06-02","moon_free_dark_hours":0.05,"moon_illumination":79,"moon_separation":151.8,"score":null,"score_astronomy":1,"score_weather":null,"transit_alt":79.2,"transit_local":"10:10","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.73,"date":"2039-06-03","moon_free_dark_hours":0.0,"moon_illumination":88,"moon_separation":156.6,"score":null,"score_astronomy":1,"score_weather":null,"transit_alt":79.2,"transit_local":"10:05","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.7,"date":"2039-06-04","moon_free_dark_hours":0.0,"moon_illumination":95,"moon_separation":153.4,"score":null,"score_astronomy":1,"score_weather":null,"transit_alt":79.2,"transit_local":"10:05","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.67,"date":"2039-06-05","moon_free_dark_hours":0.0,"moon_illumination":99,"moon_separation":144.0,"score":null,"score_astronomy":1,"score_weather":null,"transit_alt":79.2,"transit_local":"10:00","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.64,"date":"2039-06-06","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":131.7,"score":null,"score_astronomy":1,"score_weather":null,"transit_alt":79.2,"transit_local":"09:55","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.61,"date":"2039-06-07","moon_free_dark_hours":0.0,"moon_illumination":98,"moon_separation":118.5,"score":null,"score_astronomy":1,"score_weather":null,"transit_alt":79.2,"transit_local":"09:50","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.58,"date":"2039-06-08","moon_free_dark_hours":0.12,"moon_illumination":93,"moon_separation":105.0,"score":null,"score_astronomy":1,"score_weather":null,"transit_alt":79.2,"transit_local":"09:45","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.56,"date":"2039-06-09","moon_free_dark_hours":1.0,"moon_illumination":86,"moon_separation":91.6,"score":null,"score_astronomy":2,"score_weather":null,"transit_alt":79.2,"transit_local":"09:45","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.54,"date":"2039-06-10","moon_free_dark_hours":1.72,"moon_illumination":77,"moon_separation":78.6,"score":null,"score_astronomy":2,"score_weather":null,"transit_alt":79.2,"transit_local":"09:40","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":4.52,"date":"2039-06-11","moon_free_dark_hours":2.28,"moon_illumination":67,"moon_separation":66.2,"score":null,"score_astronomy":2,"score_weather":null,"transit_alt":79.2,"transit_local":"09:35","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":0.08,"best_label":"marginal","best_window":"03:35\u201303:40","dark_hours":4.5,"date":"2039-06-12","moon_free_dark_hours":2.77,"moon_illumination":57,"moon_separation":54.5,"score":null,"score_astronomy":2,"score_weather":null,"transit_alt":79.2,"transit_local":"09:30","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":0.17,"best_label":"marginal","best_window":"03:30\u201303:40","dark_hours":4.48,"date":"2039-06-13","moon_free_dark_hours":3.17,"moon_illumination":47,"moon_separation":43.6,"score":null,"score_astronomy":3,"score_weather":null,"transit_alt":79.2,"transit_local":"09:25","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":0.25,"best_label":"marginal","best_window":"03:25\u201303:40","dark_hours":4.47,"date":"2039-06-14","moon_free_dark_hours":3.55,"moon_illumination":37,"moon_separation":34.0,"score":null,"score_astronomy":4,"score_weather":null,"transit_alt":79.2,"transit_local":"09:25","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":0.42,"best_label":"marginal","best_window":"04:05\u201304:30","dark_hours":4.45,"date":"2039-06-15","moon_free_dark_hours":3.92,"moon_illumination":28,"moon_separation":26.6,"score":null,"score_astronomy":5,"score_weather":null,"transit_alt":79.2,"transit_local":"09:20","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":0.58,"best_label":"marginal","best_window":"03:55\u201304:30","dark_hours":4.44,"date":"2039-06-16","moon_free_dark_hours":4.3,"moon_illumination":19,"moon_separation":23.3,"score":null,"score_astronomy":6,"score_weather":null,"transit_alt":79.2,"transit_local":"09:15","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":0.75,"best_label":"marginal","best_window":"03:45\u201304:30","dark_hours":4.44,"date":"2039-06-17","moon_free_dark_hours":4.43,"moon_illumination":12,"moon_separation":25.5,"score":null,"score_astronomy":8,"score_weather":null,"transit_alt":79.2,"transit_local":"09:10","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":1.33,"best_label":"marginal","best_window":"03:10\u201304:30","dark_hours":4.43,"date":"2039-06-18","moon_free_dark_hours":4.42,"moon_illumination":7,"moon_separation":32.0,"score":null,"score_astronomy":9,"score_weather":null,"transit_alt":79.2,"transit_local":"09:10","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":0.08,"best_label":"good","best_window":"03:35\u201303:40","dark_hours":4.42,"date":"2039-06-19","moon_free_dark_hours":4.42,"moon_illumination":3,"moon_separation":40.7,"score":null,"score_astronomy":10,"score_weather":null,"transit_alt":79.2,"transit_local":"09:05","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":0.17,"best_label":"good","best_window":"03:30\u201303:40","dark_hours":4.42,"date":"2039-06-20","moon_free_dark_hours":4.4,"moon_illumination":1,"moon_separation":50.5,"score":null,"score_astronomy":12,"score_weather":null,"transit_alt":79.2,"transit_local":"09:00","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":0.17,"best_label":"good","best_window":"03:30\u201303:40","dark_hours":4.42,"date":"2039-06-21","moon_free_dark_hours":4.4,"moon_illumination":0,"moon_separation":61.0,"score":null,"score_astronomy":13,"score_weather":null,"transit_alt":79.2,"transit_local":"08:55","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":0.25,"best_label":"good","best_window":"03:25\u201303:40","dark_hours":4.42,"date":"2039-06-22","moon_free_dark_hours":4.4,"moon_illumination":1,"moon_separation":71.8,"score":null,"score_astronomy":15,"score_weather":null,"transit_alt":79.2,"transit_local":"08:50","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":0.33,"best_label":"good","best_window":"03:20\u201303:40","dark_hours":4.43,"date":"2039-06-23","moon_free_dark_hours":4.42,"moon_illumination":4,"moon_separation":82.9,"score":null,"score_astronomy":16,"score_weather":null,"transit_alt":79.2,"transit_local":"08:50","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":0.42,"best_label":"good","best_window":"03:15\u201303:40","dark_hours":4.43,"date":"2039-06-24","moon_free_dark_hours":4.38,"moon_illumination":10,"moon_separation":94.1,"score":null,"score_astronomy":17,"score_weather":null,"transit_alt":79.2,"transit_local":"08:45","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":0.42,"best_label":"good","best_window":"03:15\u201303:40","dark_hours":4.44,"date":"2039-06-25","moon_free_dark_hours":3.8,"moon_illumination":16,"moon_separation":105.5,"score":null,"score_astronomy":19,"score_weather":null,"transit_alt":79.2,"transit_local":"08:40","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":0.5,"best_label":"good","best_window":"03:10\u201303:40","dark_hours":4.45,"date":"2039-06-26","moon_free_dark_hours":3.28,"moon_illumination":24,"moon_separation":117.0,"score":null,"score_astronomy":22,"score_weather":null,"transit_alt":79.2,"transit_local":"08:35","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":0.58,"best_label":"good","best_window":"03:05\u201303:40","dark_hours":4.47,"date":"2039-06-27","moon_free_dark_hours":2.83,"moon_illumination":34,"moon_separation":128.3,"score":null,"score_astronomy":23,"score_weather":null,"transit_alt":79.2,"transit_local":"08:30","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":0.67,"best_label":"good","best_window":"03:00\u201303:40","dark_hours":4.48,"date":"2039-06-28","moon_free_dark_hours":2.4,"moon_illumination":44,"moon_separation":139.4,"score":null,"score_astronomy":25,"score_weather":null,"transit_alt":79.2,"transit_local":"08:30","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":0.75,"best_label":"good","best_window":"02:55\u201303:40","dark_hours":4.5,"date":"2039-06-29","moon_free_dark_hours":1.98,"moon_illumination":55,"moon_separation":149.2,"score":null,"score_astronomy":25,"score_weather":null,"transit_alt":79.2,"transit_local":"08:25","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":0.83,"best_label":"good","best_window":"02:55\u201303:45","dark_hours":4.51,"date":"2039-06-30","moon_free_dark_hours":1.55,"moon_illumination":66,"moon_separation":155.8,"score":null,"score_astronomy":28,"score_weather":null,"transit_alt":79.2,"transit_local":"08:20","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":0.92,"best_label":"good","best_window":"02:50\u201303:45","dark_hours":4.53,"date":"2039-07-01","moon_free_dark_hours":1.08,"moon_illumination":77,"moon_separation":155.6,"score":null,"score_astronomy":29,"score_weather":null,"transit_alt":79.2,"transit_local":"08:15","verdict":"unknown","weather_source":"none","weekday":"Fri"}],"note":"score_astronomy for every night; score_weather/score only where a forecast (next 4 days) or ERA5 history exists \u2014 null otherwise","start":"2039-06-02","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}}