* * * * * 19P/Borrelly * * * * *


Year Mn Day MM Mag Ref Scope Pwr coma DC tail p.a. Obs Site 2015 10 15.22 S 10.2 TK 20.3T 100 4 2 GON Alto del Castro, León (Altitude 23°. Start of astronomical twilight. Zodiacal light. Mountain location, very clear sky.)
2009 3 22.16 S 12.8 TK 20.3T 133 1.5 2 GON Alto del Castro - Aralla, León 2009 1 6.194 S 13.5 TA 31.0J 109 1.5 3 DIJ Burlage 2009 1 6.192 S 13.4 TA 31.0J 109 0.9 3/ BOU Burlage, Germany 2008 12 29.213 S 12.9 TA 31.0J 109 0.8 3 DIJ Burlage 2008 12 29.210 S 13.3 TA 31.0J 109 0.8 4 BOU Burlage, Germany 2008 11 23.82 S 12.9 TA 40.0L 144 1.1 4 YOS Kita-karuizawa, Gunma 2008 11 22.79 S 12.5 TA 40.0L 144 1.6 4/ YOS Kita-karuizawa, Gunma (It looks bright still now.) 2008 11 6.20 S 10.9 TK 20.3T 100 2.5 2/ GON Aralla, León 2008 11 1.78 S 12.0 TJ 40.0L 75 2.1 4/ YOS Kita-karuizawa, Gunma (Bright and clearly visible still. It looks extending as shown by CCD images.) 2008 10 26.18 S 11.1 TK 20.3T 100 2.5 3 GON Alto del Castro - Aralla, León 2008 10 9.19 S 10.9 TK 20.3T 77 2.2 3/ GON Alto del Trichero - Soto y Amío, León (Zodiacal light.) 2008 10 7.01 S[10.2 TK 13.0L 65 NOV Konchezero 2008 9 29.20 S 10.8 TK 20.3T 100 2 3/ GON Alto del Castro - Aralla, León (Zodiacal light.) 2008 9 9.80 S 11.3 TJ 40.0L 144 1.1 3/ YOS Kita-karuizawa, Gunma (Not easy to see due to the dim sky in the morning.) 2008 9 7.18 S 9.7 TK 20.3T 77 4 5 GON Alto del Castro - Aralla, León (Elongated coma. Comet close to star of mag. 8.8 [Tycho-2]. Zodiacal light.) 2008 8 28.17 S 9.3 TK 20.3T 77 8 3 GON Alto del Castro - Aralla, León 2008 8 9.15 S 9.1 TK 20.3T 77 6 3 GON Alto del Castro - Aralla, León (Zodiacal light. Beginning of astronomical twilight; altitude: 9 deg. Star of mag. 11.0 [Tycho-2] inside the coma.) 2008 8 2.15 S 9.6 TK 20.3T 77 2.5 3 GON Alto del Castro - Aralla, León (Mountain location, very clear sky. Zodiacal light. Beginning of astronomical twilight; altitude: 9 deg.)
2002 3 18.80 S 13.8 AC 41.0L 262 0.5 2 RES Szamotuly (Difficult object. Near bright star.) 2002 2 15.906 S 12.9 AC 31.0J 89 1.8 1/ DIJ Sint Annen 2002 2 15.901 S 12.8 AC 31.0J 89 1.7 1/ BOU Sint Annen 2002 2 14.916 S 12.9 AC 31.0J 89 1.5 2 BOU Sint Annen 2002 2 2.853 S 12.6 TK 31.0J 89 1.5 1/ DIJ Lauwersoog 2002 2 2.852 S 12.5 TK 31.0J 89 1.8 1/ BOU Lauwersoog 2002 1 20.000 S 12.1 TK 25.4J 72 1.2 1 DIJ Sint Annen 2002 1 19.998 S 12.3 TK 25.4J 72 2.2 2 BOU Sint Annen 2002 1 6.15 S 12.1 VB 25.4L 76 1.5 3 GRA Hågår Obs., Eina (Coma still clearly elongated. Close to 10th mag. star. Conditions were Bortle class 4 [last quarter Moon].) 2002 1 4.919 S 11.3 TJ 31.0J 72 1.2 2 DIJ Sint Annen 2002 1 4.917 S 11.6 TJ 31.0J 72 2.2 2 BOU Sint Annen 2001 12 16.11 M 11.5 VB 25.4L 76 2.5 3/ GRA Hågår Obs., Eina (Coma was clearly elongated at ratio 2:1 (given size is 'average' extension. Dark sky (Bortle class 3). Magnitude reference is BAA-VSS chart for U Gem.) 2001 12 13.993 S 11.0 TJ 31.0J 72 2.1 2 DIJ Sint Annen 2001 12 13.990 S 11.2 TJ 31.0J 72 2.5 3 BOU Sint Annen 2001 12 9.997 S 10.9 TJ 25.4J 88 1.4 1/ DIJ Sint Annen 2001 12 9.993 S 11.0 TJ 25.4J 88 2.0 2/ BOU Sint Annen (Comet close to star of magn. 7.4.) 2001 11 23.11 S 10.9 TJ 20.3T 100 2.0 2/ GRA Fjellhamar (Comet only faintly seen. Conditions: Bortle class 5.) 2001 11 20.12 S 10.9 TJ 20.3T 100 1.9 2/ GRA Fjellhamar (Comet appeared elongated. Very good conditions for this location [Bortle class 4 sky, NEL=6.2].) 2001 11 15.198 S 10.4:TJ 30.5T 56 2? 1/ COM Roden ("Grey sky", comet difficult.) 2001 11 15.028 S 10.6 TJ 31.0J 72 2.4 3 DIJ Sint Annen 2001 11 15.024 S 10.6 TJ 31.0J 72 2.5 3 BOU Sint Annen 2001 11 14.12 S 10.9 TJ 20.3T 100 1.8 3/ GRA Fjellhamar (Comet appeared elongated in E-W direction. Its visibility was clearly superior to that of P/2001 Q6. Conditions were Bortle scale 4-5.) 2001 11 13.09 S 11.0 TJ 20.3T 100 2.1 3 GRA Fjellhamar (Comet barely visible in a Bortle class 5 sky.) 2001 11 11.12 S 11.0 TJ 25.4L 76 2.4 3 GRA Hågår Obs., Eina 2001 10 24.06 S 10.5 TJ 20.3T 100 2.4 3 GRA Fjellhamar (Comet was faint, seen with averted vision. Bortle class 6 sky.) 2001 10 23.06 S 10.6 TJ 20.3T 100 1.9 3 GRA Fjellhamar (Comet was faint but seen at correct location. Its visibilty was inferior to that of C/2000 WM1. Bortle class 5-6 sky.) 2001 10 20.160 S 10.2 TJ 30.5T 56 2.5 2/ COM Roden 2001 10 11.08 S 10.1 TJ 20.3T 100 2.1 3/ GRA Fjellhamar (A 40% illuminated Moon [11 deg. away, but hidden by a tree] and a nearby 7th magnitude star did not disturb too much. Visibility of this comet was superior to that of C/2000 WM1. Bortle class 5-6 sky.) 2001 9 29.143 S 9.9 TJ 25.4J 58 2.5 4/ BOU Sint Annen 2001 9 28.13 S 9.8 AC 25.0L 53 3 7 LOO Genk 2001 9 27.79 B 10.3 TJ 20.0L 45 2 5 MAT Wallaroo, SA 2001 9 1.114 S 10.0 TJ 25.4J 58 3.0 4 BOU Sint Annen 2001 8 29.110 S 10.1 TJ 31.0J 72 2.0 4/ DIJ Sint Annen 2001 8 29.106 S 10.3 TJ 31.0J 72 2.7 4 BOU Sint Annen 2001 8 23.82 B 10.8 TJ 20.0L 45 1.5 6 MAT Wallaroo, SA (Moderate-strong condensation makes 19P easier to observe than P/2001 Q2.) 2001 8 14.79 S 10.4 AA 10.0B 25 SEA Cowra, NSW (Rather difficult due to nearby moon and drifting mist. Not as confident of the accuracy of the estimate as I desired.) 2001 7 22.83 S 11.4 TJ 20.0L 45 1.5 5 MAT Wallaroo, SA (Transparency very good. Borrelly has now developed a moderately high degree of condensation but is still a full magnitude fainter than the ephemeris prediction.) 2001 7 1.84 S 12.9: 20.0L 160 1 3 MAT Wallaroo, SA (Transparency good, USNO comparisons 12.6, 13.2.) 2001 6 19.84 S 13.2: 20.0L 160 1 2 MAT Wallaroo, SA (Transparency very good, USNO comparisons 12.6, 13.2. Comet rather diffuse.)