{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":4.5,"best_label":"good","best_window":"19:00\u201323:30","dark_hours":11.13,"date":"2026-01-19","moon_free_dark_hours":11.12,"moon_illumination":1,"moon_separation":81.8,"score":92,"score_astronomy":100,"score_weather":92,"transit_alt":79.1,"transit_local":"18:00","verdict":"good","weather_source":"history","weekday":"Mon"},{"best_hours":3.75,"best_label":"good","best_window":"19:00\u201322:45","dark_hours":11.11,"date":"2026-01-20","moon_free_dark_hours":11.08,"moon_illumination":5,"moon_separation":69.5,"score":81,"score_astronomy":100,"score_weather":81,"transit_alt":79.1,"transit_local":"17:55","verdict":"good","weather_source":"history","weekday":"Tue"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":11.08,"date":"2026-01-21","moon_free_dark_hours":9.92,"moon_illumination":10,"moon_separation":57.0,"score":0,"score_astronomy":100,"score_weather":0,"transit_alt":79.1,"transit_local":"17:50","verdict":"unusable","weather_source":"history","weekday":"Wed"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":11.06,"date":"2026-01-22","moon_free_dark_hours":8.78,"moon_illumination":17,"moon_separation":44.6,"score":0,"score_astronomy":93,"score_weather":0,"transit_alt":79.1,"transit_local":"17:50","verdict":"unusable","weather_source":"history","weekday":"Thu"},{"best_hours":1.92,"best_label":"good","best_window":"19:05\u201321:00","dark_hours":11.03,"date":"2026-01-23","moon_free_dark_hours":7.6,"moon_illumination":26,"moon_separation":32.4,"score":44,"score_astronomy":83,"score_weather":53,"transit_alt":79.1,"transit_local":"17:45","verdict":"marginal","weather_source":"history","weekday":"Fri"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":11.0,"date":"2026-01-24","moon_free_dark_hours":6.43,"moon_illumination":36,"moon_separation":21.4,"score":6,"score_astronomy":65,"score_weather":9,"transit_alt":79.1,"transit_local":"17:40","verdict":"poor","weather_source":"history","weekday":"Sat"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":10.97,"date":"2026-01-25","moon_free_dark_hours":5.18,"moon_illumination":47,"moon_separation":15.2,"score":0,"score_astronomy":49,"score_weather":0,"transit_alt":79.1,"transit_local":"17:35","verdict":"unusable","weather_source":"history","weekday":"Sun"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":10.94,"date":"2026-01-26","moon_free_dark_hours":3.88,"moon_illumination":58,"moon_separation":19.6,"score":0,"score_astronomy":34,"score_weather":0,"transit_alt":79.1,"transit_local":"17:35","verdict":"unusable","weather_source":"history","weekday":"Mon"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":10.91,"date":"2026-01-27","moon_free_dark_hours":2.6,"moon_illumination":69,"moon_separation":30.5,"score":4,"score_astronomy":22,"score_weather":16,"transit_alt":79.1,"transit_local":"17:30","verdict":"poor","weather_source":"history","weekday":"Tue"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":10.88,"date":"2026-01-28","moon_free_dark_hours":1.35,"moon_illumination":80,"moon_separation":43.5,"score":0,"score_astronomy":21,"score_weather":0,"transit_alt":79.1,"transit_local":"17:25","verdict":"unusable","weather_source":"history","weekday":"Wed"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":10.85,"date":"2026-01-29","moon_free_dark_hours":0.23,"moon_illumination":88,"moon_separation":57.1,"score":0,"score_astronomy":24,"score_weather":0,"transit_alt":79.1,"transit_local":"17:20","verdict":"unusable","weather_source":"history","weekday":"Thu"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":10.82,"date":"2026-01-30","moon_free_dark_hours":0.0,"moon_illumination":95,"moon_separation":71.0,"score":0,"score_astronomy":31,"score_weather":0,"transit_alt":79.1,"transit_local":"17:15","verdict":"unusable","weather_source":"history","weekday":"Fri"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":10.79,"date":"2026-01-31","moon_free_dark_hours":0.0,"moon_illumination":99,"moon_separation":84.9,"score":0,"score_astronomy":41,"score_weather":0,"transit_alt":79.1,"transit_local":"17:15","verdict":"unusable","weather_source":"history","weekday":"Sat"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":10.76,"date":"2026-02-01","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":98.7,"score":0,"score_astronomy":54,"score_weather":0,"transit_alt":79.1,"transit_local":"17:10","verdict":"unusable","weather_source":"history","weekday":"Sun"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":10.72,"date":"2026-02-02","moon_free_dark_hours":0.0,"moon_illumination":99,"moon_separation":112.2,"score":0,"score_astronomy":66,"score_weather":0,"transit_alt":79.1,"transit_local":"17:05","verdict":"unusable","weather_source":"history","weekday":"Mon"},{"best_hours":0.25,"best_label":"marginal","best_window":"18:45\u201319:00","dark_hours":10.69,"date":"2026-02-03","moon_free_dark_hours":0.42,"moon_illumination":95,"moon_separation":125.2,"score":8,"score_astronomy":80,"score_weather":10,"transit_alt":79.1,"transit_local":"17:00","verdict":"poor","weather_source":"history","weekday":"Tue"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":10.66,"date":"2026-02-04","moon_free_dark_hours":1.53,"moon_illumination":89,"moon_separation":137.7,"score":0,"score_astronomy":81,"score_weather":0,"transit_alt":79.1,"transit_local":"16:55","verdict":"unusable","weather_source":"history","weekday":"Wed"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":10.62,"date":"2026-02-05","moon_free_dark_hours":2.63,"moon_illumination":82,"moon_separation":149.2,"score":0,"score_astronomy":80,"score_weather":0,"transit_alt":79.1,"transit_local":"16:55","verdict":"unusable","weather_source":"history","weekday":"Thu"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":10.59,"date":"2026-02-06","moon_free_dark_hours":3.7,"moon_illumination":74,"moon_separation":159.1,"score":0,"score_astronomy":79,"score_weather":0,"transit_alt":79.1,"transit_local":"16:50","verdict":"unusable","weather_source":"history","weekday":"Fri"},{"best_hours":2.83,"best_label":"good","best_window":"19:20\u201322:10","dark_hours":10.55,"date":"2026-02-07","moon_free_dark_hours":4.77,"moon_illumination":65,"moon_separation":164.7,"score":69,"score_astronomy":76,"score_weather":90,"transit_alt":79.1,"transit_local":"16:45","verdict":"marginal","weather_source":"history","weekday":"Sat"},{"best_hours":0.67,"best_label":"good","best_window":"19:20\u201320:00","dark_hours":10.51,"date":"2026-02-08","moon_free_dark_hours":5.82,"moon_illumination":56,"moon_separation":162.1,"score":28,"score_astronomy":74,"score_weather":38,"transit_alt":79.1,"transit_local":"16:40","verdict":"poor","weather_source":"history","weekday":"Sun"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":10.48,"date":"2026-02-09","moon_free_dark_hours":6.88,"moon_illumination":46,"moon_separation":153.9,"score":0,"score_astronomy":71,"score_weather":0,"transit_alt":79.1,"transit_local":"16:40","verdict":"unusable","weather_source":"history","weekday":"Mon"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":10.44,"date":"2026-02-10","moon_free_dark_hours":7.9,"moon_illumination":37,"moon_separation":143.8,"score":0,"score_astronomy":69,"score_weather":0,"transit_alt":79.1,"transit_local":"16:35","verdict":"unusable","weather_source":"history","weekday":"Tue"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":10.4,"date":"2026-02-11","moon_free_dark_hours":8.85,"moon_illumination":28,"moon_separation":132.9,"score":0,"score_astronomy":66,"score_weather":0,"transit_alt":79.1,"transit_local":"16:30","verdict":"unusable","weather_source":"history","weekday":"Wed"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":10.36,"date":"2026-02-12","moon_free_dark_hours":9.68,"moon_illumination":20,"moon_separation":121.6,"score":0,"score_astronomy":64,"score_weather":0,"transit_alt":79.1,"transit_local":"16:25","verdict":"unusable","weather_source":"history","weekday":"Thu"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":10.32,"date":"2026-02-13","moon_free_dark_hours":10.3,"moon_illumination":13,"moon_separation":110.0,"score":0,"score_astronomy":62,"score_weather":0,"transit_alt":79.1,"transit_local":"16:20","verdict":"unusable","weather_source":"history","weekday":"Fri"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":10.29,"date":"2026-02-14","moon_free_dark_hours":10.27,"moon_illumination":7,"moon_separation":98.0,"score":1,"score_astronomy":60,"score_weather":2,"transit_alt":79.1,"transit_local":"16:20","verdict":"poor","weather_source":"history","weekday":"Sat"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":10.25,"date":"2026-02-15","moon_free_dark_hours":10.23,"moon_illumination":3,"moon_separation":85.8,"score":0,"score_astronomy":57,"score_weather":0,"transit_alt":79.1,"transit_local":"16:15","verdict":"unusable","weather_source":"history","weekday":"Sun"},{"best_hours":0.17,"best_label":"good","best_window":"19:30\u201319:40","dark_hours":10.21,"date":"2026-02-16","moon_free_dark_hours":10.18,"moon_illumination":0,"moon_separation":73.4,"score":12,"score_astronomy":55,"score_weather":21,"transit_alt":79.1,"transit_local":"16:10","verdict":"poor","weather_source":"history","weekday":"Mon"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":10.17,"date":"2026-02-17","moon_free_dark_hours":10.15,"moon_illumination":0,"moon_separation":60.7,"score":0,"score_astronomy":53,"score_weather":0,"transit_alt":79.1,"transit_local":"16:05","verdict":"unusable","weather_source":"history","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":"2026-01-19","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}}