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* * * * * C/2009 R1 (McNaught) * * * * *
Year Mn Day MM Mag Ref Scope Pwr coma DC tail p.a. Obs Site 2010 7 4.87 I [5.0 TK 10.0B 25 GON Alto del Castro - Aralla, León (Comet not observed. Mountain location, very clear sky. Altitude: 6 deg.) 2010 6 27.944 M 5.8 TK 8.0B 15 3 7 DIJ Burlage (Comet at altitude 6.0 deg.) 2010 6 26.972 M 5.8 TK 15.6L 29 3 7 BOU Sint Annen (Moonlight and twilight. Comet at altitude 6.6 deg.) 2010 6 26.943 S 5.5 TK 8.0B 15 4 6 DIJ Burlage 2010 6 25.972 M 5.7 TK 8.0B 15 & 3 7/ BOU Sint Annen (Moonlight and twilight. Band of fairly bright NLC up to 3-4 deg. altitude. Comet at altitude 7.6 deg.) 2010 6 25.972 M 5.3 TK 8.0B 15 5 6/ 0.5 345 DIJ Burlage 2010 6 23.976 M 5.2:TK 8.0B 15 4 7/ 0.9 345 DIJ Burlage 2010 6 25.08 S 5.8 HV 25.6L 42 2.0 7 0.3 340 BIV Versailles 2010 6 25.07 B 5.3 HV 5.0B 7 3 7 BIV Versailles 2010 6 23.08 S 5.4 HV 5.0B 7 4 7 BIV Versailles 2010 6 22.11 I 5.2 TK 0.0E 1 9 GON Alto del Castro - Aralla, León 2010 6 22.10 M 5.4 TK 5.0B 10 4 8 2.1 330 GON Alto del Castro - Aralla, León (In 25x100B, dust tail 0.2-deg in p.a. 295 deg. Mountain location, very clear sky. Altitude: 9 deg.) 2010 6 22.09 S 5.6 HV 25.6L 42 3.0 7 0.9 330 BIV Versailles 2010 6 22.07 B 5.1 HV 5.0B 7 4.0 7 0.8 330 BIV Versailles 2010 6 21.971 M 5.5 TK 8.0B 15 4 7/ 0.33 345 DIJ Burlage 2010 6 20.98 S 5.5 YG 7.0B 15 5 7 SID Korenovsk 2010 6 18.95 S 5.1 YG 7.0B 15 5 7 12m 280 SID Korenovsk 2010 6 18.10 M 5.5 TK 5.0B 10 4 7/ 1.5 320 GON Alto del Castro - Aralla, León (In 25x100B, dust tail 0.2-deg in p.a. 290 deg. Mountain location, very clear sky. Altitude: 13 deg.) 2010 6 17.971 M 5.6 TK 8.0B 15 4 7 DIJ Burlage 2010 6 16.981 M 5.5 TK 8.0B 15 3.5 8 BOU Sint Annen (Twilight. Comet at altitude 13.1 deg. With 15.6cm-L at 29 and 36x, despite bright background, broad dusttail visible, 0.2 deg. long in p.a. 270 deg. Gastail very faint, about 1.0 deg. in p.a. about 310 deg.) 2010 6 15.993 M 5.6 TK 8.0B 15 4 7 DIJ Burlage 2010 5 15.981 M 5.5 TK 8.0B 15 4.5 8 BOU Sint Annen (Twilight, and NLC below alt. 4 deg. Comet at altitude 13.3 deg.) 2010 6 15.95 S 5.3 YG 7.0B 15 3.5 7 6.5m SID Korenovsk 2010 6 15.10 M 5.4 TK 5.0B 10 3.5 7/ 2.2 305 GON Alto de Carmona - Tábara, Zamora (The comet shows a smaller coma diameter, providing a similar magnitude estimate as a week ago in my previous observation. In 25x100 binoculars: short dust tail 0.2-deg in p.a. 270 deg. Mountain location, very clear sky. Altitude: 15 deg.) 2010 6 14.954 M 5.6 TK 8.0B 15 4 7/ DIJ Burlage 2010 6 14.93 M 5.5 YG 15.0L 30 6 6 LOS Saratov 2010 6 13.95 S 5.1 YG 7.0B 15 3 7 6m SID Korenovsk 2010 6 13.94 M 5.6 YG 15.0L 30 5 6 LOS Saratov 2010 6 13.92 M 5.3 TK 20.0L 50 7 6 MAN Ramenskoye 2010 6 13.07 B 6.0 HV 5.0B 7 4 7 BIV Versailles 2010 6 12.95 S 4.9 YG 7.0B 15 6 6 SID Korenovsk 2010 6 12.93 M 5.4 TK 20.0L 50 6 5 MAN Ramenskoye 2010 6 12.88 M 5.2 YG 20.0L 50 3 8 0.2 IVA Saratov 2010 6 11.960 M 5.8 TK 8.0B 15 4.5 7/ DIJ Burlage 2010 6 11.94 S 5.2 YG 7.0B 15 6.5 6 SID Korenovsk 2010 6 10.94 S 5.2 YG 7.0B 15 6.7 6 SID Korenovsk 2010 6 7.37 sM 5.8 TK 5.0B 7 8 6 GOI Araçatuba (Moonlight, nautical twilight.) 2010 6 7.36 sM 6.0 TK 10.0B 20 7 6/ 0.5 290 GOI Araçatuba (Moonlight, astronomical twilight.) 2010 6 7.09 B 5.9 HV 40.7L 58 4.0 7 0.3 300 BIV Versailles 2010 6 7.07 B 5.6 HV 5.0B 7 5 7 BIV Versailles 2010 6 7.06 M 5.7 TK 10.0B 25 7 6/ 1.3 280 GON El Portillo - Castrocontrigo, León 2010 6 7.05 M 5.4 TK 5.0B 10 7 7 GON El Portillo - Castrocontrigo, León (Obviously brighter than three days ago. Comet close to naked eye visibility. Estimate made before moonrise. Mountain location, clear sky. Altitude: 10 deg.) 2010 6 6.36 sM 6.2 TK 10.0B 20 6 6/ 0.3 280 GOI Araçatuba (Moonlight.) 2010 6 5.93 M 5.6 TK 20.0L 50 8 6 MAN Ramenskoye 2010 6 5.08 B 6.0 HV 40.7L 58 2.5 7 0.1 290 BIV Versailles 2010 6 5.07 S 5.9 HV 5.0B 7 3 7 BIV Versailles 2010 6 4.966 M 6.4 TK 8.0B 15 3.5 8 DIJ Burlage 2010 6 4.04 M 6.4 TK 10.0B 25 7 6 GON Alto del Trichero - Soto y Amío, León (Some moonlight interference. Altitude: 7 deg.) 2010 6 4.014 S 6.8 TK 10.0B 14 5 6 LOO Genk 2010 6 3.988 M 6.5 TK 15.6L 29 3.5 6/ BOU Sint Annen (Comet close to star of magn. 7.2 [TK]. Altitude 10.1 deg.) 2010 6 3.021 S 5.9 TK 10.0B 14 3 7 LOO Genk 2010 6 2.982 S 6.7 TK 8.0B 15 4 5/ DIJ Burlage 2010 6 2.978 M 6.5 TK 15.6L 29 4.5 6 BOU Sint Annen (Comet at altitude of 8.3 deg.) 2010 6 1.07 6.5 8.0B 20 5 BAR Milan 2010 6 1.019 S 6.8 TK 8.0B 15 3 5 DIJ Burlage (Moonlight.) 2010 5 31.990 M 6.9 TK 15.6L 29 5 5 BOU Sint Annen (Moonlight. Comet at altitude of 8.4 deg.) 2010 5 29.028 M 7.3 TK 8.0B 15 4 7 DIJ Burlage (Moonlight.) 2010 5 29.011 S 7.2 TK 15.6L 29 4 4/ BOU Sint Annen (Moonlight. Comet at altitude of 9.5 deg.) 2010 5 26.35 S 6.8 TK 5.0B 7 8 4 GOI Araçatuba 2010 5 26.35 M 6.9 TK 10.0B 20 7 5/ 0.3 260 GOI Araçatuba 2010 5 26.022 S 7.7 TK 8.0B 15 8 5 DIJ Burlage (Moonlight.) 2010 5 23.35 M 7.8 TK 10.0B 20 5 5 GOI Araçatuba 2010 5 22.35 S 7.7 TK 5.0B 7 5 4 GOI Araçatuba 2010 5 22.34 M 7.9 TK 10.0B 20 4 5/ 0.2 240 GOI Araçatuba 2010 5 22.10 S 7.2 TK 5.0B 10 9 6 GON Alto del Castro - Aralla, León (In 0.20-m reflector at 77x, 0.6-deg faint tail in p.a. 260 deg. Star of mag. 9.3 [Tycho-2] inside the coma. Mountain location, very clear sky. Altitude: 18 deg.) 2010 5 20.033 S 8.2 TK 15.6L 36 4 4 BOU Sint Annen (Twilight. Altitude 6.5 deg.) 2010 5 18.060 S 8.6:TK 8.0B 15 4 4/ DIJ Burlage (Comet close to 5th magn. χ Peg.) 2010 5 17.14 S 7.8 TK 5.0B 10 8 5 GON Cueto Rosales - Riello, León (In 0.20-m reflector at 77x, coma clearly enhanced with Swan band filter. Brighter than expected. Mountain location, very clear sky. Beginning of astronomical twilight. Altitude: 18 deg.) 2010 5 17.13 S 8.1 TK 10.0B 25 7 4 GON Cueto Rosales - Riello, León 2010 5 15.33 S 8.5 TK 10.0B 20 6 5 GOI Araçatuba (Not ideal weather conditions but better than yesterday. Easily visible with big binoculars.) 2010 5 15.33 S 8.5 TK 22.0L 60 6 5/ GOI Araçatuba 2010 5 15.40 S 8.6 TK 20.3L 40 6.0 5 BIV Chile 2010 5 14.79 S 8.6 AA 10.0B 25 4 4 SEA Cowra, NSW (May have been slightly brighter through Swan Band filter.) 2010 5 14.33 S 9.1:TK 22.0L 60 5 5/ GOI Araçatuba (Some cloud interference.) 2010 5 1.77 S 10.9 TA 40.0L 144 1.5 4 YOS Kita-karuizawa, Gunma (Hard to see due to moon light and low location. It does not seem to be brightening so much.) 2010 4 10.20 S 10.2 TK 20.3T 100 1.5 5/ GON Cueto Rosales - Riello, León (Brighter than expected. Mountain location, very clear sky. Astronomical twilight. Altitude: 8 deg.)