{"calculation_version":"2026-10-10.1","forecast_source":"none","night_date":"2027-12-23","schedule":[{"end":"2027-12-23T16:05Z","end_local":"18:05","hours":1.25,"mean_quality":0.0,"start":"2027-12-23T14:50Z","start_local":"16:50","target":null},{"end":"2027-12-23T17:45Z","end_local":"19:45","hours":1.67,"mean_quality":0.77,"start":"2027-12-23T16:05Z","start_local":"18:05","target":"V1057 Cyg"},{"end":"2027-12-23T19:25Z","end_local":"21:25","hours":1.67,"mean_quality":1.0,"start":"2027-12-23T17:45Z","start_local":"19:45","target":"M31"},{"end":"2027-12-23T21:05Z","end_local":"23:05","hours":1.67,"mean_quality":0.98,"start":"2027-12-23T19:25Z","start_local":"21:25","target":"M33"},{"end":"2027-12-23T22:45Z","end_local":"00:45","hours":1.67,"mean_quality":0.99,"start":"2027-12-23T21:05Z","start_local":"23:05","target":"M45"},{"end":"2027-12-24T01:40Z","end_local":"03:40","hours":2.92,"mean_quality":0.75,"start":"2027-12-23T22:45Z","start_local":"00:45","target":"M42"},{"end":"2027-12-24T05:50Z","end_local":"07:50","hours":4.17,"mean_quality":0.0,"start":"2027-12-24T01:40Z","start_local":"03:40","target":null}],"targets":[{"best_window":{"end":"2027-12-23T23:05Z","end_local":"01:05","hours":6.42,"label":"good","mean_quality":0.93,"start":"2027-12-23T16:40Z","start_local":"18:40"},"dec":41.26875,"moon_separation":147.0,"name":"M31","quality_hours":6.64,"ra":10.68470833,"resolved":{"common_name":"Andromeda Galaxy","dec":41.26875,"morphology":"SA(s)b","name":"M 31","ra":10.68470833,"simbad_url":"https://simbad.cds.unistra.fr/simbad/sim-id?Ident=M31","source":"sesame","type":"AGN","type_text":"galaxy with an active nucleus","vmag":3.44},"score":null,"score_astronomy":100,"score_weather":null,"transit":{"airmass":1.0,"alt":89.5,"az":122.1,"t":"2027-12-23T16:55Z"},"verdict":"unknown","weather_known":false,"windows":[{"end":"2027-12-23T15:30Z","end_local":"17:30","hours":0.67,"label":"unusable","mean_quality":0.0,"start":"2027-12-23T14:50Z","start_local":"16:50"},{"end":"2027-12-23T16:05Z","end_local":"18:05","hours":0.58,"label":"poor","mean_quality":0.15,"start":"2027-12-23T15:30Z","start_local":"17:30"},{"end":"2027-12-23T16:40Z","end_local":"18:40","hours":0.58,"label":"marginal","mean_quality":0.5,"start":"2027-12-23T16:05Z","start_local":"18:05"},{"end":"2027-12-23T23:05Z","end_local":"01:05","hours":6.42,"label":"good","mean_quality":0.93,"start":"2027-12-23T16:40Z","start_local":"18:40"},{"end":"2027-12-23T23:40Z","end_local":"01:40","hours":0.58,"label":"marginal","mean_quality":0.5,"start":"2027-12-23T23:05Z","start_local":"01:05"},{"end":"2027-12-24T05:50Z","end_local":"07:50","hours":6.17,"label":"unusable","mean_quality":0.0,"start":"2027-12-23T23:40Z","start_local":"01:40"}]},{"best_window":{"end":"2027-12-24T01:10Z","end_local":"03:10","hours":6.58,"label":"good","mean_quality":0.83,"start":"2027-12-23T18:35Z","start_local":"20:35"},"dec":-5.3876,"moon_separation":131.1,"name":"M42","quality_hours":5.95,"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":null,"score_astronomy":89,"score_weather":null,"transit":{"airmass":1.47,"alt":42.9,"az":180.4,"t":"2027-12-23T21:50Z"},"verdict":"unknown","weather_known":false,"windows":[{"end":"2027-12-23T18:05Z","end_local":"20:05","hours":3.25,"label":"unusable","mean_quality":0.0,"start":"2027-12-23T14:50Z","start_local":"16:50"},{"end":"2027-12-23T18:35Z","end_local":"20:35","hours":0.5,"label":"marginal","mean_quality":0.51,"start":"2027-12-23T18:05Z","start_local":"20:05"},{"end":"2027-12-24T01:10Z","end_local":"03:10","hours":6.58,"label":"good","mean_quality":0.83,"start":"2027-12-23T18:35Z","start_local":"20:35"},{"end":"2027-12-24T01:40Z","end_local":"03:40","hours":0.5,"label":"marginal","mean_quality":0.49,"start":"2027-12-24T01:10Z","start_local":"03:10"},{"end":"2027-12-24T05:50Z","end_local":"07:50","hours":4.17,"label":"unusable","mean_quality":0.0,"start":"2027-12-24T01:40Z","start_local":"03:40"}]},{"best_window":{"end":"2027-12-24T01:10Z","end_local":"03:10","hours":8.5,"label":"good","mean_quality":0.94,"start":"2027-12-23T16:40Z","start_local":"18:40"},"dec":24.11388889,"moon_separation":166.4,"name":"M45","quality_hours":8.61,"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":null,"score_astronomy":100,"score_weather":null,"transit":{"airmass":1.05,"alt":72.5,"az":179.6,"t":"2027-12-23T20:00Z"},"verdict":"unknown","weather_known":false,"windows":[{"end":"2027-12-23T15:30Z","end_local":"17:30","hours":0.67,"label":"unusable","mean_quality":0.0,"start":"2027-12-23T14:50Z","start_local":"16:50"},{"end":"2027-12-23T16:05Z","end_local":"18:05","hours":0.58,"label":"poor","mean_quality":0.12,"start":"2027-12-23T15:30Z","start_local":"17:30"},{"end":"2027-12-23T16:40Z","end_local":"18:40","hours":0.58,"label":"marginal","mean_quality":0.44,"start":"2027-12-23T16:05Z","start_local":"18:05"},{"end":"2027-12-24T01:10Z","end_local":"03:10","hours":8.5,"label":"good","mean_quality":0.94,"start":"2027-12-23T16:40Z","start_local":"18:40"},{"end":"2027-12-24T01:40Z","end_local":"03:40","hours":0.5,"label":"marginal","mean_quality":0.5,"start":"2027-12-24T01:10Z","start_local":"03:10"},{"end":"2027-12-24T05:50Z","end_local":"07:50","hours":4.17,"label":"unusable","mean_quality":0.0,"start":"2027-12-24T01:40Z","start_local":"03:40"}]},{"best_window":{"end":"2027-12-23T19:35Z","end_local":"21:35","hours":2.92,"label":"good","mean_quality":0.84,"start":"2027-12-23T16:40Z","start_local":"18:40"},"dec":44.33,"moon_separation":106.6,"name":"NGC 7000","quality_hours":3.11,"ra":314.69583333,"resolved":{"common_name":"North America Nebula","dec":44.33,"name":"NGC 7000","ra":314.69583333,"simbad_url":"https://simbad.cds.unistra.fr/simbad/sim-id?Ident=NGC%207000","source":"sesame","type":"Cl*","type_text":"star cluster"},"score":null,"score_astronomy":74,"score_weather":null,"transit":{"airmass":1.0,"alt":87.2,"az":354.1,"t":"2027-12-23T13:15Z"},"verdict":"unknown","weather_known":false,"windows":[{"end":"2027-12-23T15:30Z","end_local":"17:30","hours":0.67,"label":"unusable","mean_quality":0.0,"start":"2027-12-23T14:50Z","start_local":"16:50"},{"end":"2027-12-23T16:05Z","end_local":"18:05","hours":0.58,"label":"poor","mean_quality":0.15,"start":"2027-12-23T15:30Z","start_local":"17:30"},{"end":"2027-12-23T16:40Z","end_local":"18:40","hours":0.58,"label":"marginal","mean_quality":0.49,"start":"2027-12-23T16:05Z","start_local":"18:05"},{"end":"2027-12-23T19:35Z","end_local":"21:35","hours":2.92,"label":"good","mean_quality":0.84,"start":"2027-12-23T16:40Z","start_local":"18:40"},{"end":"2027-12-23T20:10Z","end_local":"22:10","hours":0.58,"label":"marginal","mean_quality":0.49,"start":"2027-12-23T19:35Z","start_local":"21:35"},{"end":"2027-12-24T05:50Z","end_local":"07:50","hours":9.67,"label":"unusable","mean_quality":0.0,"start":"2027-12-23T20:10Z","start_local":"22:10"}]},{"best_window":{"end":"2027-12-23T19:35Z","end_local":"21:35","hours":2.92,"label":"good","mean_quality":0.84,"start":"2027-12-23T16:40Z","start_local":"18:40"},"dec":44.25788576,"moon_separation":106.6,"name":"V1057 Cyg","quality_hours":3.11,"ra":314.72388973,"resolved":{"dec":44.25788576,"name":"EM* LkHA 190","ra":314.72388973,"simbad_url":"https://simbad.cds.unistra.fr/simbad/sim-id?Ident=V1057%20Cyg","source":"sesame","spectral_type":"F7/G3I/IIe","type":"Or*","type_text":"Orion-type variable \u2014 a young, erupting star","vmag":12.33},"score":null,"score_astronomy":74,"score_weather":null,"transit":{"airmass":1.0,"alt":87.3,"az":354.3,"t":"2027-12-23T13:15Z"},"verdict":"unknown","weather_known":false,"windows":[{"end":"2027-12-23T15:30Z","end_local":"17:30","hours":0.67,"label":"unusable","mean_quality":0.0,"start":"2027-12-23T14:50Z","start_local":"16:50"},{"end":"2027-12-23T16:05Z","end_local":"18:05","hours":0.58,"label":"poor","mean_quality":0.15,"start":"2027-12-23T15:30Z","start_local":"17:30"},{"end":"2027-12-23T16:40Z","end_local":"18:40","hours":0.58,"label":"marginal","mean_quality":0.49,"start":"2027-12-23T16:05Z","start_local":"18:05"},{"end":"2027-12-23T19:35Z","end_local":"21:35","hours":2.92,"label":"good","mean_quality":0.84,"start":"2027-12-23T16:40Z","start_local":"18:40"},{"end":"2027-12-23T20:10Z","end_local":"22:10","hours":0.58,"label":"marginal","mean_quality":0.49,"start":"2027-12-23T19:35Z","start_local":"21:35"},{"end":"2027-12-24T05:50Z","end_local":"07:50","hours":9.67,"label":"unusable","mean_quality":0.0,"start":"2027-12-23T20:10Z","start_local":"22:10"}]},{"best_window":{"end":"2027-12-23T23:20Z","end_local":"01:20","hours":6.67,"label":"good","mean_quality":0.94,"start":"2027-12-23T16:40Z","start_local":"18:40"},"dec":30.66017511,"moon_separation":160.9,"name":"M33","quality_hours":6.89,"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":null,"score_astronomy":100,"score_weather":null,"transit":{"airmass":1.02,"alt":79.1,"az":181.9,"t":"2027-12-23T17:50Z"},"verdict":"unknown","weather_known":false,"windows":[{"end":"2027-12-23T15:30Z","end_local":"17:30","hours":0.67,"label":"unusable","mean_quality":0.0,"start":"2027-12-23T14:50Z","start_local":"16:50"},{"end":"2027-12-23T16:05Z","end_local":"18:05","hours":0.58,"label":"poor","mean_quality":0.15,"start":"2027-12-23T15:30Z","start_local":"17:30"},{"end":"2027-12-23T16:40Z","end_local":"18:40","hours":0.58,"label":"marginal","mean_quality":0.5,"start":"2027-12-23T16:05Z","start_local":"18:05"},{"end":"2027-12-23T23:20Z","end_local":"01:20","hours":6.67,"label":"good","mean_quality":0.94,"start":"2027-12-23T16:40Z","start_local":"18:40"},{"end":"2027-12-23T23:50Z","end_local":"01:50","hours":0.5,"label":"marginal","mean_quality":0.5,"start":"2027-12-23T23:20Z","start_local":"01:20"},{"end":"2027-12-24T05:50Z","end_local":"07:50","hours":6.0,"label":"unusable","mean_quality":0.0,"start":"2027-12-23T23:50Z","start_local":"01:50"}]}],"unscheduled":[{"name":"NGC 7000","why":"its best window (18:40\u201321:35) is outranked by M31, M33, V1057 Cyg"}],"warnings":[]}
