{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":6.33,"best_label":"good","best_window":"19:50\u201302:10","dark_hours":11.38,"date":"2033-01-06","moon_free_dark_hours":6.9,"moon_illumination":36,"moon_separation":84.0,"score":null,"score_astronomy":88,"score_weather":null,"transit_alt":42.9,"transit_local":"22:50","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":6.08,"best_label":"good","best_window":"20:00\u201302:05","dark_hours":11.37,"date":"2033-01-07","moon_free_dark_hours":5.75,"moon_illumination":48,"moon_separation":71.2,"score":null,"score_astronomy":85,"score_weather":null,"transit_alt":42.9,"transit_local":"22:45","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":4.83,"best_label":"good","best_window":"21:10\u201302:00","dark_hours":11.35,"date":"2033-01-08","moon_free_dark_hours":4.62,"moon_illumination":59,"moon_separation":58.8,"score":null,"score_astronomy":75,"score_weather":null,"transit_alt":42.9,"transit_local":"22:45","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":7.25,"best_label":"marginal","best_window":"19:15\u201302:30","dark_hours":11.34,"date":"2033-01-09","moon_free_dark_hours":3.52,"moon_illumination":69,"moon_separation":47.1,"score":null,"score_astronomy":53,"score_weather":null,"transit_alt":42.9,"transit_local":"22:40","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":6.67,"best_label":"marginal","best_window":"19:35\u201302:15","dark_hours":11.32,"date":"2033-01-10","moon_free_dark_hours":2.47,"moon_illumination":79,"moon_separation":36.6,"score":null,"score_astronomy":34,"score_weather":null,"transit_alt":42.9,"transit_local":"22:35","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":3.67,"best_label":"marginal","best_window":"22:05\u201301:45","dark_hours":11.3,"date":"2033-01-11","moon_free_dark_hours":1.47,"moon_illumination":87,"moon_separation":28.4,"score":null,"score_astronomy":20,"score_weather":null,"transit_alt":42.9,"transit_local":"22:30","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":11.28,"date":"2033-01-12","moon_free_dark_hours":0.53,"moon_illumination":93,"moon_separation":24.5,"score":null,"score_astronomy":14,"score_weather":null,"transit_alt":42.9,"transit_local":"22:25","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":11.26,"date":"2033-01-13","moon_free_dark_hours":0.0,"moon_illumination":97,"moon_separation":26.7,"score":null,"score_astronomy":12,"score_weather":null,"transit_alt":42.9,"transit_local":"22:25","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":1.5,"best_label":"marginal","best_window":"19:20\u201320:50","dark_hours":11.24,"date":"2033-01-14","moon_free_dark_hours":0.0,"moon_illumination":99,"moon_separation":33.6,"score":null,"score_astronomy":16,"score_weather":null,"transit_alt":42.9,"transit_local":"22:20","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":4.58,"best_label":"marginal","best_window":"18:55\u201323:30","dark_hours":11.22,"date":"2033-01-15","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":42.7,"score":null,"score_astronomy":25,"score_weather":null,"transit_alt":42.9,"transit_local":"22:15","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":6.25,"best_label":"marginal","best_window":"18:55\u201301:10","dark_hours":11.2,"date":"2033-01-16","moon_free_dark_hours":0.0,"moon_illumination":98,"moon_separation":52.9,"score":null,"score_astronomy":38,"score_weather":null,"transit_alt":42.9,"transit_local":"22:10","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":0.58,"best_label":"good","best_window":"19:00\u201319:35","dark_hours":11.17,"date":"2033-01-17","moon_free_dark_hours":0.63,"moon_illumination":94,"moon_separation":63.5,"score":null,"score_astronomy":75,"score_weather":null,"transit_alt":42.9,"transit_local":"22:10","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":4.08,"best_label":"good","best_window":"19:00\u201323:05","dark_hours":11.15,"date":"2033-01-18","moon_free_dark_hours":1.58,"moon_illumination":89,"moon_separation":74.2,"score":null,"score_astronomy":86,"score_weather":null,"transit_alt":42.9,"transit_local":"22:05","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":5.58,"best_label":"good","best_window":"19:00\u201300:35","dark_hours":11.12,"date":"2033-01-19","moon_free_dark_hours":2.52,"moon_illumination":83,"moon_separation":85.0,"score":null,"score_astronomy":88,"score_weather":null,"transit_alt":42.9,"transit_local":"22:00","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":5.92,"best_label":"good","best_window":"19:00\u201300:55","dark_hours":11.1,"date":"2033-01-20","moon_free_dark_hours":3.43,"moon_illumination":75,"moon_separation":95.7,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"21:55","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":5.92,"best_label":"good","best_window":"19:05\u201301:00","dark_hours":11.07,"date":"2033-01-21","moon_free_dark_hours":4.37,"moon_illumination":67,"moon_separation":106.5,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"21:50","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":5.92,"best_label":"good","best_window":"19:05\u201301:00","dark_hours":11.05,"date":"2033-01-22","moon_free_dark_hours":5.3,"moon_illumination":58,"moon_separation":117.2,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"21:50","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":6.0,"best_label":"good","best_window":"19:05\u201301:05","dark_hours":11.02,"date":"2033-01-23","moon_free_dark_hours":6.25,"moon_illumination":48,"moon_separation":127.7,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"21:45","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":5.92,"best_label":"good","best_window":"19:05\u201301:00","dark_hours":10.99,"date":"2033-01-24","moon_free_dark_hours":7.22,"moon_illumination":38,"moon_separation":137.9,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"21:40","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":5.83,"best_label":"good","best_window":"19:05\u201300:55","dark_hours":10.96,"date":"2033-01-25","moon_free_dark_hours":8.18,"moon_illumination":29,"moon_separation":147.2,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"21:35","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":5.67,"best_label":"good","best_window":"19:10\u201300:50","dark_hours":10.93,"date":"2033-01-26","moon_free_dark_hours":9.15,"moon_illumination":20,"moon_separation":153.9,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"21:30","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":5.67,"best_label":"good","best_window":"19:10\u201300:50","dark_hours":10.91,"date":"2033-01-27","moon_free_dark_hours":10.07,"moon_illumination":12,"moon_separation":155.3,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"21:30","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":5.58,"best_label":"good","best_window":"19:10\u201300:45","dark_hours":10.87,"date":"2033-01-28","moon_free_dark_hours":10.87,"moon_illumination":6,"moon_separation":150.0,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"21:25","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":5.5,"best_label":"good","best_window":"19:10\u201300:40","dark_hours":10.84,"date":"2033-01-29","moon_free_dark_hours":10.83,"moon_illumination":2,"moon_separation":140.1,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"21:20","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":5.42,"best_label":"good","best_window":"19:10\u201300:35","dark_hours":10.81,"date":"2033-01-30","moon_free_dark_hours":10.8,"moon_illumination":0,"moon_separation":128.1,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"21:15","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":5.25,"best_label":"good","best_window":"19:15\u201300:30","dark_hours":10.78,"date":"2033-01-31","moon_free_dark_hours":10.77,"moon_illumination":2,"moon_separation":115.0,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"21:15","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":5.25,"best_label":"good","best_window":"19:15\u201300:30","dark_hours":10.75,"date":"2033-02-01","moon_free_dark_hours":10.18,"moon_illumination":6,"moon_separation":101.5,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"21:10","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":5.17,"best_label":"good","best_window":"19:15\u201300:25","dark_hours":10.71,"date":"2033-02-02","moon_free_dark_hours":8.95,"moon_illumination":13,"moon_separation":87.9,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"21:05","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":5.08,"best_label":"good","best_window":"19:15\u201300:20","dark_hours":10.68,"date":"2033-02-03","moon_free_dark_hours":7.73,"moon_illumination":22,"moon_separation":74.6,"score":null,"score_astronomy":87,"score_weather":null,"transit_alt":42.9,"transit_local":"21:00","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":4.92,"best_label":"good","best_window":"19:20\u201300:15","dark_hours":10.65,"date":"2033-02-04","moon_free_dark_hours":6.55,"moon_illumination":32,"moon_separation":61.7,"score":null,"score_astronomy":81,"score_weather":null,"transit_alt":42.9,"transit_local":"20:55","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":"2033-01-06","target":{"common_name":"Great Orion Nebula","dec":-5.3876,"name":"M 42","ra":83.8201,"simbad_url":"https://simbad.cds.unistra.fr/simbad/sim-id?Ident=M42","source":"sesame","type":"HII","type_text":"HII region \u2014 a star-forming nebula"}}