{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":7.05,"date":"2042-04-19","moon_free_dark_hours":7.03,"moon_illumination":0,"moon_separation":20.0,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.2,"transit_local":"13:05","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":7.0,"date":"2042-04-20","moon_free_dark_hours":6.98,"moon_illumination":1,"moon_separation":20.1,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.2,"transit_local":"13:05","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":6.94,"date":"2042-04-21","moon_free_dark_hours":6.67,"moon_illumination":5,"moon_separation":28.8,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.2,"transit_local":"13:00","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":6.88,"date":"2042-04-22","moon_free_dark_hours":5.33,"moon_illumination":11,"moon_separation":40.6,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.2,"transit_local":"12:55","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":6.82,"date":"2042-04-23","moon_free_dark_hours":4.1,"moon_illumination":19,"moon_separation":53.1,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.2,"transit_local":"12:50","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":6.76,"date":"2042-04-24","moon_free_dark_hours":3.05,"moon_illumination":28,"moon_separation":65.6,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.2,"transit_local":"12:45","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":6.71,"date":"2042-04-25","moon_free_dark_hours":2.2,"moon_illumination":38,"moon_separation":77.9,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.2,"transit_local":"12:45","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":6.65,"date":"2042-04-26","moon_free_dark_hours":1.53,"moon_illumination":48,"moon_separation":89.8,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.2,"transit_local":"12:40","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":6.59,"date":"2042-04-27","moon_free_dark_hours":1.0,"moon_illumination":58,"moon_separation":101.5,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.2,"transit_local":"12:35","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":6.53,"date":"2042-04-28","moon_free_dark_hours":0.55,"moon_illumination":68,"moon_separation":112.8,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.2,"transit_local":"12:30","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":6.47,"date":"2042-04-29","moon_free_dark_hours":0.17,"moon_illumination":76,"moon_separation":123.9,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.2,"transit_local":"12:25","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":6.41,"date":"2042-04-30","moon_free_dark_hours":0.0,"moon_illumination":84,"moon_separation":134.7,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.2,"transit_local":"12:25","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":6.36,"date":"2042-05-01","moon_free_dark_hours":0.0,"moon_illumination":90,"moon_separation":144.9,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.2,"transit_local":"12:20","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":6.3,"date":"2042-05-02","moon_free_dark_hours":0.0,"moon_illumination":95,"moon_separation":154.0,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.2,"transit_local":"12:15","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":6.24,"date":"2042-05-03","moon_free_dark_hours":0.0,"moon_illumination":98,"moon_separation":160.3,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.2,"transit_local":"12:10","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":6.18,"date":"2042-05-04","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":160.5,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.2,"transit_local":"12:10","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":6.13,"date":"2042-05-05","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":154.4,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.2,"transit_local":"12:00","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":6.07,"date":"2042-05-06","moon_free_dark_hours":0.0,"moon_illumination":97,"moon_separation":145.0,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.2,"transit_local":"12:00","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":6.01,"date":"2042-05-07","moon_free_dark_hours":0.88,"moon_illumination":93,"moon_separation":134.1,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.2,"transit_local":"11:50","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":5.96,"date":"2042-05-08","moon_free_dark_hours":1.92,"moon_illumination":87,"moon_separation":122.5,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.2,"transit_local":"11:50","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":5.9,"date":"2042-05-09","moon_free_dark_hours":2.8,"moon_illumination":79,"moon_separation":110.4,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.2,"transit_local":"11:45","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":5.84,"date":"2042-05-10","moon_free_dark_hours":3.55,"moon_illumination":70,"moon_separation":98.0,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.2,"transit_local":"11:40","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":5.79,"date":"2042-05-11","moon_free_dark_hours":4.15,"moon_illumination":60,"moon_separation":85.2,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.2,"transit_local":"11:35","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"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"}],"note":"score_astronomy for every night; score_weather/score only where a forecast (next 4 days) or ERA5 history exists \u2014 null otherwise","start":"2042-04-19","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}}