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* * * * * C/2025 K1 (ATLAS) * * * * *
Year Mn Day MM Mag Ref Scope Pwr coma DC tail p.a. Obs Site 2025 12 1.220 S 10.5 AQ 15.5L 50 1.8 3 11m 172 DIJ Burlage 2025 12 1.20 S 10.8:TK 20.0L 80 & 1 5 2m 180 SCH Eerbeek (Elongated comet consisting of small coma and very short dusttail. Comet close to star of magn 12.1 [AQ].) 2025 11 24.787 M 10.2 AQ 25.4J 72 1.8 5/ 8m 270 BOU Westerwijtwerd 2025 11 22.883 S 9.9 TK 15.5L 50 2.2 4/ 10m 273 DIJ Burlage 2025 11 22.83 S 11.0:TK 20.0L 80 & 1 6 4m 280 SCH Eerbeek (Weak elongated comet.) 2025 11 22.20 S 10.3 TK 20.0L 42 & 1 7 5m 275 SCH Eerbeek (Central condensation with secondary fragment at about 1'.) 2025 11 21.855 S 9.8 TK 15.5L 50 2 4 DIJ Burlage (Altitude comet 20°.) 2025 11 21.825 M 10.4 AQ 25.4J 72 1.5 6 10m 280 BOU Westerwijtwerd (Comet altitude 18.4°. Elongated object, but cc now looks brighter and better defined during moments of good seeing.) 2025 11 21.206 S 9.2 TK 15.5L 50 4 5/ 19m 289 DIJ Burlage (Coma elongated.) 2025 11 20.886 S 9.4 TK 15.5L 50 3.7 5 15m 292 DIJ Burlage (Coma elongated. Altitude comet 20°.) 2025 11 20.79 S 9.8 TJ 40.0L 36 2.5 3 9m 295 YOS Ibaraki, Japan (Evidently elongated. Looks cool with a long tail. But the central condensation is weak and it looks like a remnant of disintegrated comet. I tried to see the split nucluus into three pieces with 257x magnification, but I could not see each components.) 2025 11 20.201 M 10.3 AQ 25.4J 58 &1.5 5 15m 286 BOU Westerwijtwerd (Coma very elongated.) 2025 11 20.20 S 9.8 TK 20.0L 42 & 2 6 6m 295 SCH Eerbeek (Elongated coma by dusttail.) 2025 11 19.969 S 9.2 TK 15.5L 29 3 5 DIJ Burlage 2025 11 18.06 S 9.6 TK 20.3T 77 2.5 7 0.4 290 GON Cueto Rosales, León (Elongated coma after the recent fragmentation.) 2025 11 17.963 S 9.2 TK 15.5L 29 4 4 16m 298 DIJ Burlage (Coma elongated. At 120x vaguely 2 nuclei visible. Comet altitude 18°.) 2025 11 16.960 S 9.2 TK 15.5L 50 2 4/ 26m 296 DIJ Burlage (Coma elongated. Comet altitude 13.9°.) 2025 11 16.944 S 9.0 TK 8.0B 15 5 DIJ Burlage (Comet altitude 11.3°.) 2025 11 9.31 S 9.7 TK 22.0L 160 2 4 GOI Araçatuba (Moonlight.) 2025 10 27.22 S 9.4 TK 8.0B 20 3 6 GON Alto de la Camperona, León (Zodiacal light.) 2025 10 27.20 S 9.8 TK 20.3T 77 2.5 5 0.3 280 GON Alto de la Camperona, León 2025 9 16.38 M 11.1 AQ 40.0L 59 1.0 6 4.0m 89 WYA Walcha, NSW (Faint tail. Enhances slightly in Swan Band filter. Altitude 18.4°.) 2025 8 26.44 M 11.5 AQ 40.0L 59 1 5/ WYA Walcha, NSW (At 182x faint tail visible, traced to 5.5’ in length in p.a. 87 deg.) 2025 8 24.867 S 11.7 AQ 15.5L 63 1.8 2/ DIJ Burlage 2025 8 24.865 S 11.6 AQ 25.4J 72 1.7 3/ BOU Garnwerd 2025 8 23.867 S 11.6 AQ 25.4J 72 1.8 3/ BOU Garnwerd 2025 8 20.90 S 11.4 TK 20.3T 100 2.5 4/ GON Alto de la Camperona, León 2025 8 18.890 M 12.0 AQ 30.5T 102 1.5 5 BOU Burlage, Germany 2025 8 18.888 S 12.2 AQ 30.5T 102 1.5 2/ DIJ Burlage 2025 8 17.906 S 11.9 AQ 15.5L 63 1.4 2 DIJ Burlage 2025 8 16.928 S 12.0 AQ 15.5L 50 1.5 2/ DIJ Burlage 2025 8 14.88 S 11.7 AQ 20.3T 100 2.5 4/ GON Puerto de San Isidro, León (Nearby field stars checked in DSS. Motion followed over 30 min.) 2025 7 20.92 S 13.3 AQ 20.3T 133 1.1 6/ GON Alto del Castro - Aralla, León (Nearby field stars checked in DSS. Motion checked over a 30-min period.) 2025 7 16.95 I 13.9 AQ 20.3T 166 0.5 7 GON Alto de la Camperona, León (Nearby field stars checked in DSS. Motion checked over a 60-min period.)