{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":8.75,"best_label":"marginal","best_window":"20:55\u201305:40","dark_hours":8.9,"date":"2029-09-25","moon_free_dark_hours":0.0,"moon_illumination":91,"moon_separation":16.4,"score":null,"score_astronomy":36,"score_weather":null,"transit_alt":79.1,"transit_local":"02:35","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":9.0,"best_label":"marginal","best_window":"20:45\u201305:45","dark_hours":8.95,"date":"2029-09-26","moon_free_dark_hours":0.03,"moon_illumination":84,"moon_separation":23.4,"score":null,"score_astronomy":47,"score_weather":null,"transit_alt":79.1,"transit_local":"02:30","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":0.42,"best_label":"good","best_window":"21:00\u201321:25","dark_hours":9.0,"date":"2029-09-27","moon_free_dark_hours":0.68,"moon_illumination":77,"moon_separation":33.1,"score":null,"score_astronomy":75,"score_weather":null,"transit_alt":79.1,"transit_local":"02:30","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":5.25,"best_label":"good","best_window":"20:55\u201302:10","dark_hours":9.05,"date":"2029-09-28","moon_free_dark_hours":1.45,"moon_illumination":69,"moon_separation":44.0,"score":null,"score_astronomy":85,"score_weather":null,"transit_alt":79.1,"transit_local":"02:25","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":8.75,"best_label":"good","best_window":"20:55\u201305:40","dark_hours":9.1,"date":"2029-09-29","moon_free_dark_hours":2.33,"moon_illumination":59,"moon_separation":55.4,"score":null,"score_astronomy":92,"score_weather":null,"transit_alt":79.1,"transit_local":"02:20","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":9.0,"best_label":"good","best_window":"20:50\u201305:50","dark_hours":9.14,"date":"2029-09-30","moon_free_dark_hours":3.32,"moon_illumination":50,"moon_separation":67.2,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":79.1,"transit_local":"02:15","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":9.08,"best_label":"good","best_window":"20:45\u201305:50","dark_hours":9.19,"date":"2029-10-01","moon_free_dark_hours":4.38,"moon_illumination":39,"moon_separation":79.4,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":79.1,"transit_local":"02:15","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":9.17,"best_label":"good","best_window":"20:40\u201305:50","dark_hours":9.24,"date":"2029-10-02","moon_free_dark_hours":5.52,"moon_illumination":29,"moon_separation":92.0,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":79.1,"transit_local":"02:10","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":9.17,"best_label":"good","best_window":"20:40\u201305:50","dark_hours":9.29,"date":"2029-10-03","moon_free_dark_hours":6.7,"moon_illumination":20,"moon_separation":105.1,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":79.1,"transit_local":"02:05","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":9.25,"best_label":"good","best_window":"20:35\u201305:50","dark_hours":9.34,"date":"2029-10-04","moon_free_dark_hours":7.93,"moon_illumination":12,"moon_separation":118.6,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":79.1,"transit_local":"02:00","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":9.42,"best_label":"good","best_window":"20:30\u201305:55","dark_hours":9.38,"date":"2029-10-05","moon_free_dark_hours":9.18,"moon_illumination":5,"moon_separation":132.3,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":79.1,"transit_local":"01:55","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":9.42,"best_label":"good","best_window":"20:30\u201305:55","dark_hours":9.43,"date":"2029-10-06","moon_free_dark_hours":9.42,"moon_illumination":1,"moon_separation":145.9,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":79.1,"transit_local":"01:55","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":9.5,"best_label":"good","best_window":"20:25\u201305:55","dark_hours":9.48,"date":"2029-10-07","moon_free_dark_hours":9.47,"moon_illumination":0,"moon_separation":158.2,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":79.1,"transit_local":"01:50","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":9.5,"best_label":"good","best_window":"20:25\u201305:55","dark_hours":9.52,"date":"2029-10-08","moon_free_dark_hours":9.5,"moon_illumination":2,"moon_separation":164.8,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":79.1,"transit_local":"01:45","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":9.58,"best_label":"good","best_window":"20:25\u201306:00","dark_hours":9.57,"date":"2029-10-09","moon_free_dark_hours":9.55,"moon_illumination":7,"moon_separation":159.1,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":79.1,"transit_local":"01:40","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":9.67,"best_label":"good","best_window":"20:20\u201306:00","dark_hours":9.61,"date":"2029-10-10","moon_free_dark_hours":9.6,"moon_illumination":14,"moon_separation":147.2,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":79.1,"transit_local":"01:35","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":9.67,"best_label":"good","best_window":"20:20\u201306:00","dark_hours":9.66,"date":"2029-10-11","moon_free_dark_hours":8.78,"moon_illumination":23,"moon_separation":133.9,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":79.1,"transit_local":"01:35","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":9.67,"best_label":"good","best_window":"20:20\u201306:00","dark_hours":9.7,"date":"2029-10-12","moon_free_dark_hours":7.77,"moon_illumination":33,"moon_separation":120.6,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":79.1,"transit_local":"01:30","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":9.67,"best_label":"good","best_window":"20:20\u201306:00","dark_hours":9.75,"date":"2029-10-13","moon_free_dark_hours":6.67,"moon_illumination":44,"moon_separation":107.4,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":79.1,"transit_local":"01:25","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":9.83,"best_label":"good","best_window":"20:15\u201306:05","dark_hours":9.79,"date":"2029-10-14","moon_free_dark_hours":5.57,"moon_illumination":55,"moon_separation":94.6,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":79.1,"transit_local":"01:20","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":9.83,"best_label":"good","best_window":"20:15\u201306:05","dark_hours":9.83,"date":"2029-10-15","moon_free_dark_hours":4.48,"moon_illumination":65,"moon_separation":82.2,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":79.1,"transit_local":"01:20","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":8.92,"best_label":"good","best_window":"21:10\u201306:05","dark_hours":9.88,"date":"2029-10-16","moon_free_dark_hours":3.45,"moon_illumination":74,"moon_separation":70.0,"score":null,"score_astronomy":100,"score_weather":null,"transit_alt":79.1,"transit_local":"01:15","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":6.75,"best_label":"good","best_window":"23:20\u201306:05","dark_hours":9.92,"date":"2029-10-17","moon_free_dark_hours":2.43,"moon_illumination":82,"moon_separation":58.2,"score":null,"score_astronomy":99,"score_weather":null,"transit_alt":79.1,"transit_local":"01:10","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":3.25,"best_label":"good","best_window":"02:55\u201306:10","dark_hours":9.96,"date":"2029-10-18","moon_free_dark_hours":1.43,"moon_illumination":89,"moon_separation":46.7,"score":null,"score_astronomy":91,"score_weather":null,"transit_alt":79.1,"transit_local":"01:05","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":0.5,"best_label":"good","best_window":"05:40\u201306:10","dark_hours":10.0,"date":"2029-10-19","moon_free_dark_hours":0.45,"moon_illumination":94,"moon_separation":35.6,"score":null,"score_astronomy":83,"score_weather":null,"transit_alt":79.1,"transit_local":"01:00","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":4.75,"best_label":"marginal","best_window":"01:25\u201306:10","dark_hours":10.05,"date":"2029-10-20","moon_free_dark_hours":0.0,"moon_illumination":98,"moon_separation":25.5,"score":null,"score_astronomy":41,"score_weather":null,"transit_alt":79.1,"transit_local":"01:00","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":3.17,"best_label":"marginal","best_window":"03:00\u201306:10","dark_hours":10.09,"date":"2029-10-21","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":17.5,"score":null,"score_astronomy":31,"score_weather":null,"transit_alt":79.1,"transit_local":"00:55","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":2.83,"best_label":"marginal","best_window":"20:05\u201322:55","dark_hours":10.13,"date":"2029-10-22","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":15.5,"score":null,"score_astronomy":30,"score_weather":null,"transit_alt":79.1,"transit_local":"00:50","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":3.58,"best_label":"marginal","best_window":"20:05\u201323:40","dark_hours":10.17,"date":"2029-10-23","moon_free_dark_hours":0.0,"moon_illumination":98,"moon_separation":21.2,"score":null,"score_astronomy":35,"score_weather":null,"transit_alt":79.1,"transit_local":"00:45","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":5.08,"best_label":"marginal","best_window":"20:00\u201301:05","dark_hours":10.21,"date":"2029-10-24","moon_free_dark_hours":0.0,"moon_illumination":94,"moon_separation":30.5,"score":null,"score_astronomy":44,"score_weather":null,"transit_alt":79.1,"transit_local":"00:40","verdict":"unknown","weather_source":"none","weekday":"Wed"}],"note":"score_astronomy for every night; score_weather/score only where a forecast (next 4 days) or ERA5 history exists \u2014 null otherwise","start":"2029-09-25","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}}