{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":6.5,"best_label":"good","best_window":"21:55\u201304:25","dark_hours":11.37,"date":"2046-12-03","moon_free_dark_hours":7.32,"moon_illumination":36,"moon_separation":114.6,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"01:05","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":6.42,"best_label":"good","best_window":"21:55\u201304:20","dark_hours":11.38,"date":"2046-12-04","moon_free_dark_hours":6.28,"moon_illumination":46,"moon_separation":104.4,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"01:05","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":6.33,"best_label":"good","best_window":"22:00\u201304:20","dark_hours":11.4,"date":"2046-12-05","moon_free_dark_hours":5.28,"moon_illumination":56,"moon_separation":94.3,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"01:00","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":6.08,"best_label":"good","best_window":"22:10\u201304:15","dark_hours":11.41,"date":"2046-12-06","moon_free_dark_hours":4.32,"moon_illumination":65,"moon_separation":84.2,"score":null,"score_astronomy":88,"score_weather":null,"transit_alt":42.9,"transit_local":"00:55","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":5.17,"best_label":"good","best_window":"23:00\u201304:10","dark_hours":11.42,"date":"2046-12-07","moon_free_dark_hours":3.33,"moon_illumination":74,"moon_separation":74.2,"score":null,"score_astronomy":85,"score_weather":null,"transit_alt":42.9,"transit_local":"00:50","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":2.25,"best_label":"good","best_window":"01:20\u201303:35","dark_hours":11.43,"date":"2046-12-08","moon_free_dark_hours":2.33,"moon_illumination":81,"moon_separation":64.3,"score":null,"score_astronomy":74,"score_weather":null,"transit_alt":42.9,"transit_local":"00:45","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":6.92,"best_label":"marginal","best_window":"21:35\u201304:30","dark_hours":11.44,"date":"2046-12-09","moon_free_dark_hours":1.32,"moon_illumination":88,"moon_separation":54.8,"score":null,"score_astronomy":44,"score_weather":null,"transit_alt":42.9,"transit_local":"00:45","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":6.25,"best_label":"marginal","best_window":"22:00\u201304:15","dark_hours":11.45,"date":"2046-12-10","moon_free_dark_hours":0.27,"moon_illumination":94,"moon_separation":45.8,"score":null,"score_astronomy":29,"score_weather":null,"transit_alt":42.9,"transit_local":"00:40","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":2.25,"best_label":"marginal","best_window":"01:30\u201303:45","dark_hours":11.46,"date":"2046-12-11","moon_free_dark_hours":0.0,"moon_illumination":98,"moon_separation":38.2,"score":null,"score_astronomy":18,"score_weather":null,"transit_alt":42.9,"transit_local":"00:35","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":11.47,"date":"2046-12-12","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":32.9,"score":null,"score_astronomy":11,"score_weather":null,"transit_alt":42.9,"transit_local":"00:30","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":11.48,"date":"2046-12-13","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":31.5,"score":null,"score_astronomy":10,"score_weather":null,"transit_alt":42.9,"transit_local":"00:30","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":0.67,"best_label":"marginal","best_window":"21:35\u201322:15","dark_hours":11.49,"date":"2046-12-14","moon_free_dark_hours":0.0,"moon_illumination":98,"moon_separation":34.7,"score":null,"score_astronomy":15,"score_weather":null,"transit_alt":42.9,"transit_local":"00:25","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":5.25,"best_label":"marginal","best_window":"20:55\u201302:10","dark_hours":11.49,"date":"2046-12-15","moon_free_dark_hours":0.43,"moon_illumination":93,"moon_separation":41.6,"score":null,"score_astronomy":25,"score_weather":null,"transit_alt":42.9,"transit_local":"00:20","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":6.83,"best_label":"marginal","best_window":"20:35\u201303:25","dark_hours":11.5,"date":"2046-12-16","moon_free_dark_hours":1.58,"moon_illumination":87,"moon_separation":50.9,"score":null,"score_astronomy":42,"score_weather":null,"transit_alt":42.9,"transit_local":"00:15","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":2.17,"best_label":"good","best_window":"21:30\u201323:40","dark_hours":11.5,"date":"2046-12-17","moon_free_dark_hours":2.77,"moon_illumination":78,"moon_separation":61.5,"score":null,"score_astronomy":72,"score_weather":null,"transit_alt":42.9,"transit_local":"00:10","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":5.42,"best_label":"good","best_window":"20:55\u201302:20","dark_hours":11.5,"date":"2046-12-18","moon_free_dark_hours":3.97,"moon_illumination":69,"moon_separation":72.9,"score":null,"score_astronomy":85,"score_weather":null,"transit_alt":42.9,"transit_local":"00:10","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":6.17,"best_label":"good","best_window":"20:50\u201303:00","dark_hours":11.51,"date":"2046-12-19","moon_free_dark_hours":5.13,"moon_illumination":58,"moon_separation":84.7,"score":null,"score_astronomy":88,"score_weather":null,"transit_alt":42.9,"transit_local":"00:05","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":6.42,"best_label":"good","best_window":"20:45\u201303:10","dark_hours":11.51,"date":"2046-12-20","moon_free_dark_hours":6.35,"moon_illumination":46,"moon_separation":96.7,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"00:00","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":6.5,"best_label":"good","best_window":"20:40\u201303:10","dark_hours":11.51,"date":"2046-12-21","moon_free_dark_hours":7.55,"moon_illumination":35,"moon_separation":108.7,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"23:55","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":6.5,"best_label":"good","best_window":"20:40\u201303:10","dark_hours":11.51,"date":"2046-12-22","moon_free_dark_hours":8.82,"moon_illumination":25,"moon_separation":120.4,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"23:50","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":6.5,"best_label":"good","best_window":"20:35\u201303:05","dark_hours":11.51,"date":"2046-12-23","moon_free_dark_hours":10.07,"moon_illumination":15,"moon_separation":131.3,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"23:50","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":6.58,"best_label":"good","best_window":"20:30\u201303:05","dark_hours":11.5,"date":"2046-12-24","moon_free_dark_hours":11.3,"moon_illumination":8,"moon_separation":140.6,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"23:45","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":6.58,"best_label":"good","best_window":"20:25\u201303:00","dark_hours":11.5,"date":"2046-12-25","moon_free_dark_hours":11.48,"moon_illumination":3,"moon_separation":147.0,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"23:40","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":6.58,"best_label":"good","best_window":"20:20\u201302:55","dark_hours":11.5,"date":"2046-12-26","moon_free_dark_hours":11.48,"moon_illumination":0,"moon_separation":148.5,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"23:35","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":6.5,"best_label":"good","best_window":"20:20\u201302:50","dark_hours":11.49,"date":"2046-12-27","moon_free_dark_hours":11.47,"moon_illumination":0,"moon_separation":144.8,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"23:35","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":6.58,"best_label":"good","best_window":"20:15\u201302:50","dark_hours":11.48,"date":"2046-12-28","moon_free_dark_hours":11.47,"moon_illumination":3,"moon_separation":137.5,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"23:30","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":6.58,"best_label":"good","best_window":"20:10\u201302:45","dark_hours":11.48,"date":"2046-12-29","moon_free_dark_hours":10.98,"moon_illumination":7,"moon_separation":128.3,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"23:25","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":6.5,"best_label":"good","best_window":"20:10\u201302:40","dark_hours":11.47,"date":"2046-12-30","moon_free_dark_hours":9.85,"moon_illumination":13,"moon_separation":118.4,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"23:20","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":6.5,"best_label":"good","best_window":"20:05\u201302:35","dark_hours":11.46,"date":"2046-12-31","moon_free_dark_hours":8.8,"moon_illumination":20,"moon_separation":108.1,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"23:15","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":6.42,"best_label":"good","best_window":"20:05\u201302:30","dark_hours":11.45,"date":"2047-01-01","moon_free_dark_hours":7.77,"moon_illumination":29,"moon_separation":97.8,"score":null,"score_astronomy":89,"score_weather":null,"transit_alt":42.9,"transit_local":"23:15","verdict":"unknown","weather_source":"none","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":"2046-12-03","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"}}
