{"calculation_version":"2026-10-10.1","forecast_source":"history","night_date":"2026-01-20","schedule":[{"end":"2026-01-20T16:30Z","end_local":"18:30","hours":1.17,"mean_quality":0.0,"start":"2026-01-20T15:20Z","start_local":"17:20","target":null},{"end":"2026-01-20T21:00Z","end_local":"23:00","hours":4.5,"mean_quality":0.85,"start":"2026-01-20T16:30Z","start_local":"18:30","target":"M45"},{"end":"2026-01-21T05:45Z","end_local":"07:45","hours":8.75,"mean_quality":0.0,"start":"2026-01-20T21:00Z","start_local":"23:00","target":null}],"targets":[{"best_window":{"end":"2026-01-20T21:00Z","end_local":"23:00","hours":4.0,"label":"good","mean_quality":0.9,"start":"2026-01-20T17:00Z","start_local":"19:00"},"dec":24.11388889,"moon_separation":94.3,"name":"M45","quality_hours":4.17,"ra":56.60083333,"resolved":{"common_name":"Seven Sisters","dec":24.11388889,"name":"Cl Melotte 22","ra":56.60083333,"simbad_url":"https://simbad.cds.unistra.fr/simbad/sim-id?Ident=M45","source":"sesame","type":"OpC","type_text":"open cluster"},"score":64,"score_astronomy":100,"score_weather":64,"transit":{"airmass":1.05,"alt":72.5,"az":181.2,"t":"2026-01-20T18:10Z"},"verdict":"marginal","weather_known":true,"windows":[{"end":"2026-01-20T15:55Z","end_local":"17:55","hours":0.58,"label":"unusable","mean_quality":0.0,"start":"2026-01-20T15:20Z","start_local":"17:20"},{"end":"2026-01-20T16:30Z","end_local":"18:30","hours":0.58,"label":"poor","mean_quality":0.15,"start":"2026-01-20T15:55Z","start_local":"17:55"},{"end":"2026-01-20T17:00Z","end_local":"19:00","hours":0.5,"label":"marginal","mean_quality":0.5,"start":"2026-01-20T16:30Z","start_local":"18:30"},{"end":"2026-01-20T21:00Z","end_local":"23:00","hours":4.0,"label":"good","mean_quality":0.9,"start":"2026-01-20T17:00Z","start_local":"19:00"},{"end":"2026-01-20T22:00Z","end_local":"00:00","hours":1.0,"label":"unusable","mean_quality":0.0,"start":"2026-01-20T21:00Z","start_local":"23:00"},{"end":"2026-01-20T23:45Z","end_local":"01:45","hours":1.75,"label":"poor","mean_quality":0.14,"start":"2026-01-20T22:00Z","start_local":"00:00"},{"end":"2026-01-21T05:45Z","end_local":"07:45","hours":6.0,"label":"unusable","mean_quality":0.0,"start":"2026-01-20T23:45Z","start_local":"01:45"}]}],"unscheduled":[],"warnings":[]}
