* * * * * 260P/McNaught * * * * *

Year Mn Day MM Mag Ref Scope Pwr coma DC tail p.a. Obs Site 2019 8 8.71 M 13.6 AQ 40.0L 108 0.6 6 1.8m 250 WYA Walcha, NSW (Faint tail visible. Stellar pseudo-nucleus, opaque inner coma, faint outer coma.) 2019 8 5.11 S 11.8 AQ 20.3T 133 1.3 4 GON Alto del Castro - Aralla, León 2019 8 3.70 M 14.0 AQ 40.0L 108 0.7 6 1.3m 230 WYA Walcha, NSW (Faint tail visible. Diffuse outer coma, does not enhance in Swan Band filter [dims considerably].) 2019 8 2.07 S 11.7 AQ 20.3T 133 1.3 4/ GON Alto del Castro - Aralla, León 2019 7 30.04 S 11.6 AQ 20.3T 100 1.3 4 GON Alto de la Camperona, León
2012 11 24.77 S 12.7 TA 40.0L 144 1.6 4 YOS Kita-karuizawa, Gunma (It keeps bright still now. I could see it well even with bright Moon in the evening.) 2012 11 6.91 S 10.7 TK 20.3T 100 3 3 GON Pandorado, León 2012 11 4.84 S 10.5 TK 20.3T 100 4 3 GON Collada del Fresno - Sierra del Aramo, Asturias (Asymmetric coma.) 2012 10 12.83 S 12.6 TT 20.3L 63 1.5 5 GUZ Szklary 2012 10 12.00 S 12.5 TT 20.3L 63 1.5 5 GUZ Krosno 2012 10 7.870 S 12.6 AQ 30.5T 73 1.5 4 DIJ Burlage 2012 10 7.868 S 12.7 AQ 30.5T 73 1.4 4 BOU Burlage, Germany (Comet observed only 5' from NGC 753. It was smaller and of slightly lower surface brightness than this galaxy, but the central condensation was more pronounced.} 2012 10 5.86 S 10.6 TK 20.3T 77 5 3/ GON Ranedo de Curueño, León (Asymmetric coma.) 2012 9 22.908 S 12.5 AQ 30.5T 73 1.5 3/ BOU Burlage, Germany 2012 9 22.906 S 12.6 AQ 30.5T 73 1.2 3/ DIJ Burlage 2012 9 19.894 S 12.5 AQ 30.5T 73 1.1 4 DIJ Burlage 2012 9 19.892 S 12.5 AQ 30.5T 73 1.3 4 BOU Burlage, Germany 2012 9 15.932 S 12.6 AQ 30.5T 95 0.9 4/ DIJ Burlage 2012 9 15.931 S 12.7 AQ 30.5T 95 1.2 4 BOU Burlage, Germany 2012 9 15.77 S 12.4 TA 40.0L 75 2.4 6/ YOS Kita-karuizawa, Gunma (Bright, strongly condensed and easy to see.) 2012 9 13.97 S 11.4 TK 20.3T 100 2.0 4 GON Alto del Castro, León 2012 9 9.919 S 12.6 TA 30.5T 117 1.1 3 BOU Burlage, Germany 2012 9 9.917 S 12.4 AQ 30.5T 117 0.8 4 DIJ Burlage 2012 9 6.91 S 11.0 TK 20.3T 100 2.5 3 GON Llamas de Rueda, León 2012 8 22.02 S 11.8 TK 20.3T 77 1.3 3/ GON Alto del Castro, León (Brighter than expected.} 2012 8 19.70 S 13.0 TA 40.0L 75 1.6 6 YOS Kita-karuizawa, Gunma (Surprisingly bright, and easy to see. It looks like a 12-mag comet. 7 years passed since my last observation at the discovery in 2005. I remember it was a tiny faint comet at that time. So I was surprised the comet looks very bright now.) 2012 7 28.29 S 11.6 AU 22.0L 160 2.5 2 GOI Araçatuba 2012 7 23.10 S 12.8 TA 20.3T 133 1.3 3 GON Alto del Castro, León (Brighter than expected. Nearby field stars checked in DSS. Comparison stars taken from TASS photometry. Motion observed over a 45-min period. Mountain location, very clear sky.)
2005 10 24.65 S[13.8 TA 40.0L 257 !0.7 YOS Gunma, Japan (Not visible. Very close to the half moon. The field was covered with many faint stars, so it was hard to confirm a diffuse faint comet.) 2005 9 3.965 aS 13.7 HN 31.0J 155 0.6 5 DIJ Lauwersoog 2005 9 3.956 aS 13.7 HN 31.0J 155 0.5 5/ BOU Lauwersoog (Small, condensed object. Motion obvious over a 30m period.) 2005 8 5.72 S 13.9 HS 40.0L 257 0.5 4 YOS Gunma, Japan (A faint and small object was visible. Probably the comet was visible visually. I want other visual observers to confirm it with large telescopes. Michael Jäger reported P/2005 K3 is brighter than C/2005 K1 by 0.5 mag.)