{"calculation_version":"2026-10-10.1","forecast_source":"history","night_date":"2026-05-17","schedule":[{"end":"2026-05-18T03:00Z","end_local":"06:00","hours":9.42,"mean_quality":0.0,"start":"2026-05-17T17:35Z","start_local":"20:35","target":null}],"targets":[{"best_window":null,"dec":38.78368896,"moon_separation":108.7,"name":"Vega","quality_hours":0.1,"ra":279.23473479,"resolved":{"common_name":"Vega","dec":38.78368896,"name":"* alf Lyr","ra":279.23473479,"simbad_url":"https://simbad.cds.unistra.fr/simbad/sim-id?Ident=Vega","source":"sesame","spectral_type":"A0V","type":"dS*","type_text":"delta Scuti variable","vmag":0.03},"score":2,"score_astronomy":100,"score_weather":2,"transit":{"airmass":1.0,"alt":87.1,"az":176.6,"t":"2026-05-18T01:15Z"},"verdict":"poor","weather_known":true,"windows":[{"end":"2026-05-17T18:50Z","end_local":"21:50","hours":1.25,"label":"unusable","mean_quality":0.0,"start":"2026-05-17T17:35Z","start_local":"20:35"},{"end":"2026-05-17T20:00Z","end_local":"23:00","hours":1.17,"label":"poor","mean_quality":0.08,"start":"2026-05-17T18:50Z","start_local":"21:50"},{"end":"2026-05-18T03:00Z","end_local":"06:00","hours":7.0,"label":"unusable","mean_quality":0.0,"start":"2026-05-17T20:00Z","start_local":"23:00"}]}],"unscheduled":[{"name":"Vega","why":"Overcast (\u226580 % cloud) for 6.5 of 8.3 dark hours \u2014 the sky is closed whatever the geometry says."}],"warnings":[]}