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* * * * * C/2006 VZ13 (LINEAR) * * * * *
Year Mn Day MM Mag Ref Scope Pwr coma DC tail p.a. Obs Site 2007 8 15.39 S 9.1 AA 10.0B 25 3 SEA Cowra, NSW (At 71x in 25.4-cm. reflector, comet appeared centrally condensed but without stellar condensation. With averted vision, a spike of ion tail extended from centre of coma toward east, but could not be traced beyond outer boundary of coma.) 2007 8 14.40 S 9.2 AA 10.0B 25 SEA Cowra, NSW (Not very obvious in cone of Zodiacal Light, but enhanced through Swan Band filter.) 2007 8 11.85 S 9.5 TK 40.7L 58 3.5 4 BIV French Alpes 2007 8 9.90 S 8.4 TK 10.0B 25 5 4 GON Alto del Castro - Aralla, León 2007 8 8.37 S 8.8 AA 10.0B 25 SEA The Entrance, NSW (Not as easily visible as previous nights.) 2007 8 7.90 S 8.2 TK 10.0B 25 6 4 GON Alto del Trichero - Soto y Amío, León 2007 8 6.37 S 8.3 AA 10.0B 25 5 5 SEA The Entrance, NSW (Strongly enhanced through Swan Band filter.) 2007 8 5.86 S 8.9 TK 40.7L 58 4.0 5 BIV French Alpes 2007 8 5.86 S 8.9 TK 5.0B 7 6 4 BIV French Alpes 2007 8 4.86 S 8.7 TK 5.0B 7 6 5 BIV French Alpes 2007 8 4.86 S 8.6 TK 40.7L 58 4.0 5 BIV French Alpes 2007 8 4.42 M 8.6 AA 10.0B 25 5 SEA The Entrance, NSW 2007 8 3.90 S 8.1 TK 5.0B 10 7 5 GON Alto del Castro - Aralla, León 2007 8 3.89 S 9.0 TK 40.7L 58 5.0 5 BIV French Alpes 2007 8 2.28 S 8.2 TJ 6.6R 10 10 4 YOS Oahu Island, Hawaii 2007 7 31.901 S 7.9 TK 6.0B 15 9 3 DIJ Groningen 2007 7 27.875 S 7.8 TK 6.0B 15 7 3 DIJ Anathal, Germany 2007 7 25.02 S 7.8 TK 5.0B 10 8 5 GON Alto del Castro - Aralla, León 2007 7 24.956 M 7.8 TK 15.6L 24 7 4 BOU Sint Annen 2007 7 24.900 S 7.5 TK 6.0B 15 9 3 DIJ Sassenberg, Germany 2007 7 23.903 S 8.7 TK 25.0L 53 3.0 4 LOO Genk 2007 7 22.949 S 7.5 TK 8.0B 15 7 3/ DIJ Sint Annen 2007 7 22.946 M 7.7 TK 8.0B 15 8 4 BOU Sint Annen (Comet only 23' from M3, the latter being clearly brighter.) 2007 7 21.97 S 7.6 TK 5.0B 10 8 5 GON Puerto del Manzanal, León 2007 7 21.003 S 7.4 TK 6.0B 15 7 3/ DIJ Noorddijk 2007 7 20.927 S 8.0 TK 6.0B 12 3.0 4 LOO Genk 2007 7 20.92 S 7.5 TK 5.0B 7 10 3 BIV Versailles 2007 7 20.91 S 7.5 TK 25.6L 42 6.0 4 BIV Versailles 2007 7 19.903 S 7.8 TK 25.0L 53 3.5 6 LOO Genk 2007 7 19.40 S 7.6 AA 10.0B 25 SEA Cowra, NSW 2007 7 18.983 M 7.3 TK 8.0B 15 7 4/ DIJ Sint Annen 2007 7 18.979 M 7.4 TK 8.0B 15 8 4/ BOU Sint Annen 2007 7 18.95 S 7.4 TK 6.0B 20 8 5 GIL Noordwijk aan Zee 2007 7 18.939 S 7.6 TK 8.0B 15 & 9 5 COM Roden 2007 7 18.42 M 7.6 AA 10.0B 25 6 5 SEA Cowra, NSW (Slightly enhanced using Swan Band filter.) 2007 7 17.98 S 7.7 TK 25.6L 42 8.0 5 0.25 75 BIV Versailles 2007 7 17.94 S 7.7 TK 5.0B 7 15 4 BIV Versailles 2007 7 17.938 S 7.7 TK 25.0L 53 5.0 5 LOO Genk 2007 7 17.00 S 7.3 TK 5.0B 7 12 4 GON Collada de la Cobertoria, Lena, Asturias 2007 7 15.950 S 7.6 TK 8.0B 15 & 7 4/ COM Roden 2007 7 15.948 M 7.2 TK 6.0B 15 8 5 DIJ Groningen 2007 7 14.983 M 7.3 TK 8.0B 15 10 5 DIJ Sint Annen 2007 7 14.982 M 7.3 TK 8.0B 15 10 4/ BOU Sint Annen 2007 7 14.93 S 7.8 TK 5.0B 7 10 3 BIV Versailles 2007 7 14.92 S 8.0 TK 40.7L 58 6.0 4 BIV Versailles 2007 7 14.03 S 7.2 TK 5.0B 7 13 4 GON Alto del Castro - Aralla, León 2007 7 14.020 M 7.6 TK 5.0B 10 4 COM Roden 2007 7 13.985 S 7.3 TK 8.0B 15 9 4 BOU Groningen 2007 7 13.95 S 7.6 TK 5.0B 7 10 4 BIV Versailles 2007 7 13.94 S 7.9 TK 25.6L 42 6.0 5 BIV Versailles 2007 7 13.931 S 7.3 TK 25.0L 53 2.5 4 LOO Genk 2007 7 11.94 S 8.1 TK 5.0B 7 8 5 BIV Versailles 2007 7 11.93 S 8.4 TK 25.6L 42 5.5 6 BIV Versailles 2007 7 10.01 S 7.3 TK 5.0B 7 10 4 GON Mirantes de Luna, León 2007 7 8.94 S 8.0 TK 5.0B 7 9 5 BIV Lezeau, Normandy 2007 7 8.93 S 8.4 TK 25.6L 42 6.5 5 BIV Lezeau, Normandy 2007 7 7.990 S 7.9 TK 15.6L 29 7 5 DIJ Sint Annen 2007 7 7.986 M 7.6 TK 15.6L 29 7 4/ BOU Sint Annen 2007 7 7.97 S 8.1 TK 5.0B 7 8 5 BIV Lezeau, Normandy 2007 7 7.958 S 8.0 TK 30.5T 56 & 7 4 COM Roden (Eccentric central condensation.) 2007 7 7.95 S 8.3 TK 25.6L 42 7.0 5 BIV Lezeau, Normandy 2007 7 7.931 S 7.5 TK 25.0L 53 2.5 3 LOO Genk 2007 7 5.94 S 7.8 TK 5.0B 10 8 4 GON Porto da Xesta, Lugo 2007 7 4.91 S 7.9 TK 5.0B 7 8 4 GON Aralla, León 2007 7 4.90 S 8.1 TK 10.0B 25 7 3/ GON Aralla, León 2007 6 26.11 S 8.8 TK 10.0B 25 5 3/ GON Alto del Trichero - Soto y Amío, León 2007 6 26.10 S 9.2 TK 20.3T 77 4 4 GON Alto del Trichero - Soto y Amío, León 2007 6 23.68 S 9.4 TJ 6.6R 10 7.5 5 YOS Ishigaki-jima, Okinawa (I brought a monocular in my trip to Okinawa, and observed C/2006 VZ13. The comet was already bright enough to be clearly visible with a small monocular.) 2007 6 23.03 S 9.4 TK 10.0B 25 5 3 GON Alto del Trichero - Soto y Amío, León 2007 6 20.01 S 10.2 TK 20.3T 77 3.5 3/ GON Alto del Castro - Aralla, León 2007 6 20.00 S 9.8 TK 10.0B 25 3.5 3/ GON Alto del Castro - Aralla, León 2007 6 19.979 S 9.9 TK 10.0R 25 5 2 KRI Schierling 2007 6 17.95 S 9.8 TK 10.0B 25 3 3/ GON Collada de la Cobertoria, Lena, Asturias 2007 6 12.05 S 10.3 TK 10.0B 25 3 3/ GON Alto del Castro - Aralla, León 2007 6 5.97 S 11.1 TK 20.3T 77 2.5 3 GON Alto del Castro - Aralla, León 2007 6 4.97 S 11.7 TK 20.3T 133 2.0 3 GON Alto del Castro - Aralla, León 2007 5 20.08 S 12.8 HS 25.6L 84 0.5 4 BIV Lezeaux, Normandy 2007 5 18.022 S 12.8 TA 31.0J 109 1.8 2/ DIJ Sint Annen 2007 5 18.017 S 13.0 TA 31.0J 109 1.2 3 BOU Sint Annen 2007 4 28.77 S 13.3 HS 40.0L 257 0.6 3 YOS Kita-karuizawa, Gunma (Near limit, but a small faint object was visible. I observed it with higher magnification because it was located near a magn. 13.8 star. The comet seemed much fainter than this star in focus. I estimated the magnitude using Sidgwick method, but maybe overestimated.)