{"calculation_version":"2026-10-10.1","forecast_source":"history","night_date":"2025-04-21","schedule":[{"end":"2025-04-21T19:00Z","end_local":"22:00","hours":1.92,"mean_quality":0.0,"start":"2025-04-21T17:05Z","start_local":"20:05","target":null},{"end":"2025-04-21T21:00Z","end_local":"00:00","hours":2.0,"mean_quality":0.48,"start":"2025-04-21T19:00Z","start_local":"22:00","target":"3C 273"},{"end":"2025-04-21T23:00Z","end_local":"02:00","hours":2.0,"mean_quality":0.0,"start":"2025-04-21T21:00Z","start_local":"00:00","target":null},{"end":"2025-04-22T01:10Z","end_local":"04:10","hours":2.17,"mean_quality":0.61,"start":"2025-04-21T23:00Z","start_local":"02:00","target":"3C 273"},{"end":"2025-04-22T03:35Z","end_local":"06:35","hours":2.42,"mean_quality":0.0,"start":"2025-04-22T01:10Z","start_local":"04:10","target":null}],"targets":[{"best_window":{"end":"2025-04-22T00:40Z","end_local":"03:40","hours":0.67,"label":"good","mean_quality":0.74,"start":"2025-04-22T00:00Z","start_local":"03:00"},"dec":2.05238823,"moon_separation":126.8,"name":"3C 273","quality_hours":2.69,"ra":187.27791594,"resolved":{"dec":2.05238823,"morphology":"E3","name":"3C 273","ra":187.27791594,"simbad_url":"https://simbad.cds.unistra.fr/simbad/sim-id?Ident=3C%20273","source":"sesame","type":"BLL","type_text":"BL Lac object \u2014 a blazar","vmag":14.83},"score":44,"score_astronomy":93,"score_weather":47,"transit":{"airmass":1.3,"alt":50.2,"az":179.7,"t":"2025-04-21T20:50Z"},"verdict":"marginal","weather_known":true,"windows":[{"end":"2025-04-21T19:00Z","end_local":"22:00","hours":1.92,"label":"unusable","mean_quality":0.0,"start":"2025-04-21T17:05Z","start_local":"20:05"},{"end":"2025-04-21T21:00Z","end_local":"00:00","hours":2.0,"label":"marginal","mean_quality":0.48,"start":"2025-04-21T19:00Z","start_local":"22:00"},{"end":"2025-04-21T23:00Z","end_local":"02:00","hours":2.0,"label":"poor","mean_quality":0.21,"start":"2025-04-21T21:00Z","start_local":"00:00"},{"end":"2025-04-21T23:20Z","end_local":"02:20","hours":0.33,"label":"good","mean_quality":0.61,"start":"2025-04-21T23:00Z","start_local":"02:00"},{"end":"2025-04-22T00:00Z","end_local":"03:00","hours":0.67,"label":"marginal","mean_quality":0.58,"start":"2025-04-21T23:20Z","start_local":"02:20"},{"end":"2025-04-22T00:40Z","end_local":"03:40","hours":0.67,"label":"good","mean_quality":0.74,"start":"2025-04-22T00:00Z","start_local":"03:00"},{"end":"2025-04-22T01:10Z","end_local":"04:10","hours":0.5,"label":"marginal","mean_quality":0.46,"start":"2025-04-22T00:40Z","start_local":"03:40"},{"end":"2025-04-22T03:35Z","end_local":"06:35","hours":2.42,"label":"unusable","mean_quality":0.0,"start":"2025-04-22T01:10Z","start_local":"04:10"}]}],"unscheduled":[],"warnings":[]}