{"calculation_version":"2026-10-10.1","days":30,"nights":[{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":7.36,"date":"2027-04-14","moon_free_dark_hours":1.35,"moon_illumination":61,"moon_separation":93.7,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.1,"transit_local":"13:25","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":7.31,"date":"2027-04-15","moon_free_dark_hours":0.82,"moon_illumination":72,"moon_separation":107.4,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.1,"transit_local":"13:25","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":7.25,"date":"2027-04-16","moon_free_dark_hours":0.37,"moon_illumination":81,"moon_separation":120.9,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.1,"transit_local":"13:20","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":7.19,"date":"2027-04-17","moon_free_dark_hours":0.0,"moon_illumination":89,"moon_separation":134.2,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.1,"transit_local":"13:15","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":7.13,"date":"2027-04-18","moon_free_dark_hours":0.0,"moon_illumination":95,"moon_separation":146.9,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.1,"transit_local":"13:10","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":7.08,"date":"2027-04-19","moon_free_dark_hours":0.0,"moon_illumination":99,"moon_separation":158.2,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.1,"transit_local":"13:05","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":7.02,"date":"2027-04-20","moon_free_dark_hours":0.0,"moon_illumination":100,"moon_separation":165.2,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.1,"transit_local":"13:05","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":6.96,"date":"2027-04-21","moon_free_dark_hours":0.0,"moon_illumination":99,"moon_separation":162.4,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.1,"transit_local":"13:00","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":6.9,"date":"2027-04-22","moon_free_dark_hours":0.52,"moon_illumination":96,"moon_separation":153.0,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.1,"transit_local":"12:55","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":6.84,"date":"2027-04-23","moon_free_dark_hours":1.58,"moon_illumination":90,"moon_separation":141.9,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.1,"transit_local":"12:50","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":6.78,"date":"2027-04-24","moon_free_dark_hours":2.52,"moon_illumination":84,"moon_separation":130.5,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.1,"transit_local":"12:50","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":6.73,"date":"2027-04-25","moon_free_dark_hours":3.33,"moon_illumination":76,"moon_separation":118.9,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.1,"transit_local":"12:45","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":6.67,"date":"2027-04-26","moon_free_dark_hours":3.98,"moon_illumination":68,"moon_separation":107.4,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.1,"transit_local":"12:40","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":6.61,"date":"2027-04-27","moon_free_dark_hours":4.52,"moon_illumination":59,"moon_separation":96.0,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.1,"transit_local":"12:35","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":6.55,"date":"2027-04-28","moon_free_dark_hours":4.95,"moon_illumination":49,"moon_separation":84.5,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.1,"transit_local":"12:30","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":6.49,"date":"2027-04-29","moon_free_dark_hours":5.32,"moon_illumination":40,"moon_separation":73.0,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.1,"transit_local":"12:30","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":6.43,"date":"2027-04-30","moon_free_dark_hours":5.67,"moon_illumination":31,"moon_separation":61.3,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.1,"transit_local":"12:25","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":6.38,"date":"2027-05-01","moon_free_dark_hours":5.98,"moon_illumination":22,"moon_separation":49.6,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.1,"transit_local":"12:20","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":6.32,"date":"2027-05-02","moon_free_dark_hours":6.28,"moon_illumination":14,"moon_separation":37.8,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.1,"transit_local":"12:15","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":6.26,"date":"2027-05-03","moon_free_dark_hours":6.25,"moon_illumination":8,"moon_separation":26.4,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.1,"transit_local":"12:10","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":6.2,"date":"2027-05-04","moon_free_dark_hours":6.18,"moon_illumination":3,"moon_separation":17.0,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.1,"transit_local":"12:10","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":6.15,"date":"2027-05-05","moon_free_dark_hours":6.12,"moon_illumination":0,"moon_separation":15.2,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.1,"transit_local":"12:00","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":6.09,"date":"2027-05-06","moon_free_dark_hours":6.08,"moon_illumination":0,"moon_separation":23.6,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.1,"transit_local":"12:00","verdict":"unknown","weather_source":"none","weekday":"Thu"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":6.03,"date":"2027-05-07","moon_free_dark_hours":6.02,"moon_illumination":3,"moon_separation":35.7,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.1,"transit_local":"11:55","verdict":"unknown","weather_source":"none","weekday":"Fri"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":5.98,"date":"2027-05-08","moon_free_dark_hours":5.07,"moon_illumination":8,"moon_separation":49.1,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.1,"transit_local":"11:50","verdict":"unknown","weather_source":"none","weekday":"Sat"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":5.92,"date":"2027-05-09","moon_free_dark_hours":4.02,"moon_illumination":16,"moon_separation":62.9,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.1,"transit_local":"11:45","verdict":"unknown","weather_source":"none","weekday":"Sun"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":5.86,"date":"2027-05-10","moon_free_dark_hours":3.18,"moon_illumination":25,"moon_separation":76.8,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.1,"transit_local":"11:40","verdict":"unknown","weather_source":"none","weekday":"Mon"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":5.81,"date":"2027-05-11","moon_free_dark_hours":2.48,"moon_illumination":36,"moon_separation":90.7,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.1,"transit_local":"11:35","verdict":"unknown","weather_source":"none","weekday":"Tue"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":5.75,"date":"2027-05-12","moon_free_dark_hours":1.93,"moon_illumination":47,"moon_separation":104.4,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.1,"transit_local":"11:35","verdict":"unknown","weather_source":"none","weekday":"Wed"},{"best_hours":0.0,"best_label":null,"best_window":null,"dark_hours":5.7,"date":"2027-05-13","moon_free_dark_hours":1.47,"moon_illumination":58,"moon_separation":117.9,"score":null,"score_astronomy":0,"score_weather":null,"transit_alt":79.1,"transit_local":"11:30","verdict":"unknown","weather_source":"none","weekday":"Thu"}],"note":"score_astronomy for every night; score_weather/score only where a forecast (next 4 days) or ERA5 history exists \u2014 null otherwise","start":"2027-04-14","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}}