{"calculation_version":"2026-10-10.1","forecast_source":"history","night_date":"2026-05-20","schedule":[{"end":"2026-05-21T03:00Z","end_local":"06:00","hours":9.42,"mean_quality":0.0,"start":"2026-05-20T17:35Z","start_local":"20:35","target":null}],"targets":[{"best_window":null,"dec":30.66017511,"moon_separation":83.4,"name":"M33","quality_hours":0.01,"ra":23.46206906,"resolved":{"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},"score":0,"score_astronomy":0,"score_weather":62,"transit":{"airmass":1.02,"alt":79.1,"az":179.5,"t":"2026-05-21T08:00Z"},"verdict":"unusable","weather_known":true,"windows":[{"end":"2026-05-21T02:05Z","end_local":"05:05","hours":8.5,"label":"unusable","mean_quality":0.0,"start":"2026-05-20T17:35Z","start_local":"20:35"},{"end":"2026-05-21T02:25Z","end_local":"05:25","hours":0.33,"label":"poor","mean_quality":0.04,"start":"2026-05-21T02:05Z","start_local":"05:05"},{"end":"2026-05-21T03:00Z","end_local":"06:00","hours":0.58,"label":"unusable","mean_quality":0.0,"start":"2026-05-21T02:25Z","start_local":"05:25"}]}],"unscheduled":[{"name":"M33","why":"no usable window tonight"}],"warnings":[]}