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* * * * * 19P/Borrelly * * * * *
Year Mn Day MM Mag Ref Scope Pwr coma DC tail p.a. Obs Site 2022 5 25.92 S 11.2 TK 20.3T 100 3 3 GON Cueto Rosales, León 2022 5 4.91 S 10.2 TK 20.3T 77 4 3 GON Camposagrado - Cuadros, León 2022 4 28.91 S 10.3 TK 20.3T 77 3.5 4 GON Cueto Rosales, León 2022 4 23.872 S 11.3 AQ 31.0J 72 2.0 1/ DIJ Burlage 2022 4 23.869 S 11.4 AQ 31.0J 72 1.9 3 BOU Burlage, Germany 2022 4 19.894 S 11.2 AQ 31.0J 72 1.8 1/ DIJ Burlage 2022 4 19.888 S 11.3 AQ 31.0J 72 2.5 3 BOU Burlage, Germany 2022 4 18.875 S 11.4 AQ 25.4J 72 2.2 2/ BOU Westerwijtwerd 2022 4 2.998 S 10.4 AQ 15.5L 42 3.5 1 DIJ Burlage 2022 4 1.86 S 9.9 TK 20.3T 77 3.5 5 GON Matadeon de los Oteros, León 2022 3 31.84 S 10.5 AQ 40.7L 72 3.5 6 BIV 2022 3 27.851 S 10.2 AQ 15.5L 42 3.5 2/ DIJ Burlage 2022 3 27.84 S 10.6 TK 20.0L 80 2 2 SCH Eerbeek 2022 3 26.88 S 10.5 TK 20.0L 80 3 2 SCH Eerbeek 2022 3 25.829 S 10.4 AQ 25.4J 58 2.7 4 BOU Westerwijtwerd 2022 3 24.884 S 9.9 AQ 15.5L 42 3.0 2/ DIJ Burlage 2022 3 24.830 M 10.3 AQ 25.4J 72 3 4 BOU Westerwijtwerd 2022 3 23.86 S 10.2 TK 20.0L 80 3 2 SCH Eerbeek 2022 3 23.840 S 9.9 AQ 15.5L 42 3 3 DIJ Burlage 2022 3 23.828 M 10.1 AQ 25.4J 58 3.5 3/ BOU Westerwijtwerd 2022 3 23.84 S 9.8 TK 20.3T 77 3.5 5 GON Pico Cañón, Asturias 2022 3 22.84 S 10.7 AQ 40.7L 72 3.5 5 0.1 70 BIV 2022 3 22.83 S 10.3:TK 20.0L 80 & 3 2 SCH Eerbeek 2022 3 22.38 M 9.8 AQ 40.0L 59 2.5 3/ WYA Walcha, NSW (Low altitude 8.7°. Diffuse coma, opaque centre. Twilight interference.) 2022 3 21.819 S 10.4 AQ 15.5L 50 3.5 2/ DIJ Burlage 2022 3 21.38 M 9.8 TK 40.0L 59 2.5 3/ WYA Walcha, NSW (Low altitude 9.2°. Twilight interference.) 2022 3 7.90 S 9.7 AQ 40.7L 72 5 5 BIV 2022 3 7.86 S 9.3 TK 20.0L 42 4 3 SCH Eerbeek (Moonlight.) 2022 3 6.97 S 9.7 TK 22.0L 60 3 4 GOI Araçatuba 2022 3 6.90 S 9.5 TK 20.0L 42 3 3 SCH Eerbeek 2022 3 5.85 S 10.1 AQ 40.7L 72 5 5 BIV 2022 3 5.813 S 9.2 TK 15.5L 42 5 4 DIJ Burlage 2022 3 4.874 S 9.2 TK 15.5L 29 6 3/ DIJ Burlage 2022 3 4.84 S 9.4 TK 20.3T 77 4 5 GON Alto del Trichero, León 2022 3 4.82 S 9.3 TK 20.0L 52 3 3 SCH Bussloo 2022 3 4.799 M 9.6 TA 25.4J 58 4 5 BOU Westerwijtwerd 2022 3 3.897 S 9.4 TK 15.5L 42 4 3/ DIJ Burlage 2022 3 3.88 S 9.3 TK 20.0L 52 & 3 3 SCH Bussloo 2022 3 3.807 S 10.2 TK 32.0L 70 1.0 6 LOO Genk 2022 3 3.814 M 9.6 TA 25.4J 58 4 5 BOU Westerwijtwerd 2022 3 2.890 S 9.4 TK 15.5L 42 5 2/ DIJ Burlage 2022 3 2.812 M 9.5 TA 25.4J 47 3.5 5 BOU Lauwersoog 2022 3 2.81 S 9.3 TK 20.0L 42 5 3 SCH Eerbeek 2022 2 28.780 S 9.3 TK 15.5L 42 3.5 4 DIJ Burlage 2022 2 27.834 S 10.0 TK 32.0L 70 1.0 6 LOO Genk 2022 2 27.83 S 9.3 TK 20.0L 42 & 4 3 SCH Eerbeek 2022 2 27.804 S 9.4 TA 15.5L 36 3 3 DIJ Burlage 2022 2 27.802 M 9.4 TA 15.5L 36 5 4/ BOU Burlage, Germany 2022 2 26.83 S 9.2 TK 20.0L 42 3 3 SCH Eerbeek (Some cirrus.) 2022 2 26.81 S 10.0 AQ 40.7L 72 5 6 BIV 2022 2 26.802 S 9.8 TK 32.0L 70 1.5 5 LOO Genk 2022 2 26.792 S 9.4 TK 15.5L 29 3.6 4/ DIJ Burlage 2022 2 25.901 S 9.2 TK 15.5L 42 5 3 DIJ Burlage 2022 2 25.83 S 9.6 AQ 40.7L 72 5 6 BIV 2022 2 25.822 M 9.4 TA 25.4J 47 3.5 5 BOU Lauwersoog 2022 2 24.849 S 9.1 TK 15.5L 29 4 3 DIJ Burlage 2022 2 22.855 S 9.4 TK 15.5L 29 3.5 3/ DIJ Burlage 2022 2 22.851 S 9.3 TK 8.0B 15 5 3 DIJ Burlage 2022 2 22.840 M 9.4 TK 25.4J 47 4 4 BOU Lauwersoog 2022 2 22.40 S 9.2 TJ 40.0L 36 4.5 4/ YOS Mt. Tsukuba, Ibaraki (Bright and large.) 2022 2 20.97 S 9.1 TK 22.0L 60 3 4 GOI Araçatuba 2022 2 19.81 S 9.3 TK 20.3T 77 4 5 GON Alto del Trichero, León 2022 2 11.791 S 9.3 TK 8.0B 15 6 3 DIJ Burlage (Moonlight.) 2022 2 5.85 S 9.1 TK 20.3T 77 5 5 GON Puerto de Aralla, León (Some moonlight interference.) 2022 2 4.85 S 9.8 AQ 40.7L 72 5 7 0.1 80 BIV 2022 1 31.45 M 8.8 TK 25.0L 40 8 6 WYA Walcha, NSW (Faint elongations of the coma to the South and East. Opaque centre, stellar pseudo-nucleus visible.) 2022 1 29.82 S 8.9 TK 20.0L 42 & 4 5 SCH Eerbeek 2022 1 28.44 M 8.9 TK 25.0L 40 5 6 WYA Walcha, NSW (Outer coma dims in Swan Band filter and enhances inner coma.) 2022 1 24.771 S 8.9 TK 32.0L 70 1.0 4 LOO Genk 2022 1 22.98 S 8.7 TK 10.0B 20 4 4 GOI Araçatuba 2022 1 21.98 S 8.8 TK 10.0B 20 4 4 GOI Araçatuba 2022 1 21.84 S 8.8 TK 20.3T 77 7 5 GON Alto del Castro - Aralla, León 2022 1 20.78 S 9.2 TK 20.0L 42 & 4 3 SCH Eerbeek 2022 1 6.726 S 9.7 TK 32.0L 70 1.5 4 LOO Genk (Twilight and some moonlight. Altitude 25°.) 2022 1 5.790 S 9.4 TK 25.4J 47 3.2 4 BOU Lauwersoog 2022 1 5.79 S 9.7 AQ 40.7L 72 4.5 5 BIV 2022 1 3.47 M 9.3 TK 25.0L 40 3.8 6 WYA Walcha, NSW (Enhances well in Swan Band filter. Opaque centre, diffuse outer, stellar pseudo-nucleus.) 2021 12 31.99 S 9.5 TK 22.0L 60 4 4/ GOI Araçatuba 2021 12 31.49 S 9.0 AA 10.0B 25 SEA Cowra, NSW 2021 12 31.45 M 9.5 TK 7.0B 15 9.5 5/ WYA Walcha, NSW (Diffuse coma, transparent outer, opaque inner coma with faint stellar central condensation.) 2021 12 30.83 S 9.1 TK 20.3T 77 5 4 GON Collado de Vega Cubiellos - Sierra del Aramo, Asturias 2021 12 30.79 S 10.1 TK 40.7L 72 3 6 BIV 2021 12 30.50 S 8.9 AA 10.0B 25 SEA Cowra, NSW 2021 12 29.47 M 9.0 TK 25.0L 40 7.5 4/ WYA Walcha, NSW (Enhances slightly in Swan Band filter. Diffuse outer, opaque inner coma.) 2021 12 25.98 S 9.6 TK 22.0L 60 4 4/ GOI Araçatuba 2021 12 25.751 S 10.0 AQ 15.5L 36 3.5 2/ DIJ Burlage 2021 12 25.747 S 9.8 TK 15.5L 36 3.5 3/ BOU Burlage, Germany (Close to star of magn. 9.7. Altitude 14.2°.) 2021 12 25.02 S 9.7 TK 22.0L 60 3 4 GOI Araçatuba 2021 12 21.728 S 9.6 TK 8.0B 15 5 2/ DIJ Burlage 2021 12 4.97 S 10.7 TK 22.0L 60 2 3 GOI Araçatuba 2021 12 2.82 S 9.8 TK 20.3T 77 6 3/ GON Sierra de Santa Maria - Castrocontrigo, León (Altitude 10°.) 2021 11 27.96 S 11.0 AU 22.0L 160 2.5 4 GOI Araçatuba 2021 11 21.96 S 11.1 AU 22.0L 160 2 4 GOI Araçatuba 2021 11 2.12 S 11.6 AU 22.0L 160 1.5 4 GOI Araçatuba 2021 10 25.44 M 12.9 AQ 40.0L 108 1.2 6 WYA Walcha, NSW (Stellar pseudo-nucleus visible, transparent outer coma. No enhancement in Swan Band filter.) 2021 10 9.64 M 13.6 AQ 40.0L 108 1.0 6 WYA Walcha, NSW (Coma dims in Swan Band filter. Stellar pseudo-nucleus visible, transparent outer coma.) 2021 10 8.69 M 13.4 AQ 40.0L 108 1.3 6 WYA Walcha, NSW (Stellar pseudo-nucleus visible. Bright star to the South-West in the field, annoying.) 2021 10 6.45 M 13.7 AQ 40.0L 108 1.0 6 WYA Walcha, NSW (No enhancement in Swan Band filter. Faint stellar pseudo-nucleus visible.) 2021 9 11.71 M 14.6 AQ 40.0L 182 0.6 6 WYA Walcha, NSW (No enhancement in Swan Band filter, opaque centre, stellar centre in good seeing. Windy conditions.) 2021 9 8.48 M 15.0 AQ 40.0L 261 0.3 6 WYA Walcha, NSW (Coma small, whitish coloured centre, faint stellar pseudo-nucleus.) 2021 9 7.70 M 14.9 AQ 40.0L 261 0.6 6 WYA Walcha, NSW (Faint stellar pseudo-nucleus visible, diffuse outer coma.) 2021 8 31.45 M 15.2 AQ 40.0L 261 0.4 6 WYA Walcha, NSW (Diffuse, semi-transparent coma, stellar pseudo-nucleus.) 2021 8 28.47 M 15.0 AQ 40.0L 261 0.4 4/ WYA Walcha, NSW (Diffuse, opaque coma, close to faint star.)
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.)
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°. 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 (Zodiacal light. Beginning of astronomical twilight; altitude 9°.)
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.)