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* * * * * 220P/McNaught * * * * *
Year Mn Day MM Mag Ref Scope Pwr coma DC tail p.a. Obs Site 2026 9 16.096 S 11.4 AQ 25.4J 72 2.8 2 BOU Westerwijtwerd 2026 9 4.60 M 11.5 AQ 25.0L 74 1.7 4 WYA Walcha, NSW (Close to star. Diffuse semi-transparent coma.) 2026 8 26.088 S 10.3 AQ 25.4J 58 3.5 3 BOU Westerwijtwerd 2026 8 25.077 S 10.2 AQ 25.4J 47 4 2/ BOU Westerwijtwerd 2026 8 25.06 S 10.3 TK 20.0L 42 & 4 2 SCH Eerbeek (After recent outburst now only a weak fuzzy coma.) 2026 8 24.108 S 10.2 TK 15.5L 50 3.5 3 DIJ Burlage 2026 8 24.06 S 10.3 TK 20.0L 42 3 3 SCH Eerbeek (Comet close to star TYC 0648-0385-1 [9.8]. After recent outburst now only a weak fuzzy coma.) 2026 8 21.979 S 9.6 TK 8.0B 15 4.1 3 DIJ Burlage 2026 8 21.062 S 9.6 TK 25.4J 47 5 2/ 15m 250 BOU Westerwijtwerd (Somewhat elongated due to onset of dusttail. Long, narrow tail spine visible, but very faintly, to about 15' in length.) 2026 8 18.66 S 8.4 TJ 40.0L 75 2.8 2 YOS Mt. Tsukuba, Ibaraki (Finally I could see this comet. It looks bright still now.) 2025 8 16.068 S 8.2 TK 8.0B 15 8.5 2/ BOU Sint Annen (Comet appears elongated towards p.a. 255 deg.) 2025 8 14.059 S 7.6 TK 8.0B 15 10 3 BOU Sint Annen (Comet appears elongated towards roughly p.a. 250 deg.) 2026 8 13.101 S 8.2 TK 8.0B 12 5 4 LOO Genk 2026 8 13.08 S 7.6 TK 5.6B 8 &13 5 SCH Cordillera Cantabria, Castilla y León, Spain (Clear mountian location at 1445m. In 15x80B, elongated coma [dusttail] in p.a 250 deg.) 2026 8 13.055 S 7.4 TK 8.0B 15 9 3/ BOU Sint Annen 2026 8 12.094 S 8.1 TK 8.0B 12 5 4 LOO Genk 2026 8 12.080 S 7.7 TK 8.0B 15 9 4/ DIJ Burlage 2026 8 12.050 M 7.3 TK 8.0B 15 9 3/ 9m 255 BOU Sint Annen (Very faint (dust?)tail visible. Comet fading fairly rapidly and becoming more diffuse.) 2026 8 11.097 S 8.0 TK 10.0B 14 5 5 LOO Genk 2026 8 11.056 M 7.1 TK 5.6B 8 8 4 BOU Sint Annen 2026 8 11.024 S 7.4 TK 5.0B 10 5 DIJ Burlage 2026 8 11.020 S 7.5 TK 8.0B 15 5 6 DIJ Burlage 2026 8 10.104 S 7.1 TK 10.0B 14 6 5 LOO Genk 2026 8 9.108 S 6.8 TK 5.0B 10 5.5 4 LOO Genk 2026 8 9.07 S 6.9 TK 5.6B 8 &12 5 SCH Eerbeek ((After outburst. Slight moonlight. Some clouds.) 2026 8 9.052 M 6.6 TK 5.6B 8 8 5 BOU Sint Annen (Minor interference from moonlight [18.0% illuminated].) 2026 8 8.09 S 6.8 TK 8.0B 15 & 8 5 SCH Eerbeek (After outburst. In 20.0L at 114x, a short bright dusttail of about 2’ in p.a. 220 deg. from the central condensation. Slight moonlight [k=28% at 32 degrees distance]. In nautical twilight, altitude Sun -14°.) 2026 8 8.056 M 6.5 TK 5.6B 8 7 6 BOU Sint Annen 2026 8 8.052 M 6.5 TK 8.0B 15 7.5 5/ BOU Sint Annen (Some interference from moonlight [27.9% illuminated].) 2026 8 7.982 S 6.8 TK 8.0B 15 11 7/ DIJ Burlage (Altitude comet 11.7°. Moon behind clouds.) 2026 8 6.04 S 6.1 TK 5.0B 10 9 6/ GON Cueto Rosales, León (Comet in outburst. Quarter moon light interference. Altitude 18°.) 2026 8 6.02 S 6.3 TK 10.2M 50 6 6 GON Cueto Rosales, León 2026 6 22.71 M 11.8 AQ 25.0L 40 2.7 3/ WYA Walcha, NSW (No enhancement in Swan Band filter.) 2026 6 12.10 S 10.3 TK 20.3T 77 5 2/ GON Collada de Aralla, León (Altitude 13°.) 2026 6 3.33 S 8.3 TK 10.0B 20 3 4/ GOI Araçatuba (Moonlight.)