{"calculation_version":"2026-10-10.1","forecast_source":"history","night_date":"2026-01-17","schedule":[{"end":"2026-01-17T16:55Z","end_local":"18:55","hours":1.67,"mean_quality":0.0,"start":"2026-01-17T15:15Z","start_local":"17:15","target":null},{"end":"2026-01-17T23:00Z","end_local":"01:00","hours":6.08,"mean_quality":0.7,"start":"2026-01-17T16:55Z","start_local":"18:55","target":"M42"},{"end":"2026-01-18T05:45Z","end_local":"07:45","hours":6.75,"mean_quality":0.0,"start":"2026-01-17T23:00Z","start_local":"01:00","target":null}],"targets":[{"best_window":{"end":"2026-01-17T22:00Z","end_local":"00:00","hours":3.0,"label":"good","mean_quality":0.84,"start":"2026-01-17T19:00Z","start_local":"21:00"},"dec":-5.3876,"moon_separation":139.6,"name":"M42","quality_hours":4.39,"ra":83.8201,"resolved":{"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"},"score":67,"score_astronomy":89,"score_weather":76,"transit":{"airmass":1.47,"alt":42.9,"az":180.5,"t":"2026-01-17T20:10Z"},"verdict":"marginal","weather_known":true,"windows":[{"end":"2026-01-17T16:25Z","end_local":"18:25","hours":1.17,"label":"unusable","mean_quality":0.0,"start":"2026-01-17T15:15Z","start_local":"17:15"},{"end":"2026-01-17T16:55Z","end_local":"18:55","hours":0.5,"label":"poor","mean_quality":0.25,"start":"2026-01-17T16:25Z","start_local":"18:25"},{"end":"2026-01-17T17:05Z","end_local":"19:05","hours":0.17,"label":"marginal","mean_quality":0.45,"start":"2026-01-17T16:55Z","start_local":"18:55"},{"end":"2026-01-17T18:00Z","end_local":"20:00","hours":0.92,"label":"good","mean_quality":0.7,"start":"2026-01-17T17:05Z","start_local":"19:05"},{"end":"2026-01-17T19:00Z","end_local":"21:00","hours":1.0,"label":"marginal","mean_quality":0.57,"start":"2026-01-17T18:00Z","start_local":"20:00"},{"end":"2026-01-17T22:00Z","end_local":"00:00","hours":3.0,"label":"good","mean_quality":0.84,"start":"2026-01-17T19:00Z","start_local":"21:00"},{"end":"2026-01-17T23:00Z","end_local":"01:00","hours":1.0,"label":"marginal","mean_quality":0.46,"start":"2026-01-17T22:00Z","start_local":"00:00"},{"end":"2026-01-18T05:45Z","end_local":"07:45","hours":6.75,"label":"unusable","mean_quality":0.0,"start":"2026-01-17T23:00Z","start_local":"01:00"}]}],"unscheduled":[],"warnings":[]}