* * * * * 64P/Swift-Gehrels * * * * *

Year Mn Day MM Mag Ref Scope Pwr coma DC tail p.a. Obs Site 2019 2 27.871 S 13.4 AQ 30.5T 139 0.8 1 DIJ Burlage 2019 2 27.870 S 13.5 AQ 30.5T 139 1.0 1 BOU Burlage, Germany 2019 2 24.97 S 10.7 TK 20.3T 77 4 1/ GON Puerto de Aralla, Puerto de Aralla, León 2019 2 23.48 S 12.4 TA 40.0L 75 2.3 1 YOS Mt. Hanadate, Ibaraki (It became diffuse and faint.) 2019 2 4.47 S 11.2 AQ 25.0L 39 3.1 2 WYA Walcha, NSW (Very diffuse, weak centre.) 2019 2 3.853 S 11.2 AQ 30.5T 54 3 1/ BOU Burlage, Germany 2019 2 3.845 S 11.0 AQ 30.5T 54 2.0 1 DIJ Burlage 2019 2 3.44 S 11.6 AQ 25.0L 83 2.8 2 WYA Walcha, NSW (Diffuse, transparent coma, weakly condensed. Faintly visible at 39x.) 2019 1 31.990 S 10.5 AQ 15.5L 42 3.5 2 DIJ Burlage 2019 1 25.86 S 9.8 TK 20.3T 100 5 3 GON Villacintor, León (Mag. 11.6 [AQ] star in coma.) 2019 1 14.02 S 9.8 TK 20.3T 77 6 3 GON Alto del Castro - Aralla, León (Several stars inside the coma, the brightest being mag. 10.8.) 2019 1 12.56 S 9.9 TK 25.0L 39 6 3 WYA Walcha, NSW (Diffuse, weakly condensed. Low altitude 10.4°.) 2019 1 9.024 S 9.3 TK 8.0B 15 4 3 DIJ Burlage 2019 1 6.82 S 9.0 TK 20.3T 77 8 3 GON Alto del Castro - Aralla, León 2019 1 4.89 S 9.3 TK 20.3T 77 7 3 GON Les Retuertes - Sierra del Aramo, Asturias 2019 1 3.866 S 9.3 TK 15.5L 29 5 3/ DIJ Burlage 2019 1 1.87 S 9.1 TK 20.3T 77 7 3 GON Alto del Castro - Aralla, León 2018 12 31.60 S 10.2 TJ 40.0L 36 6 3 YOS Mt. Hanadate, Ibaraki (Diffuse, weak condensation.) 2018 12 31.04 S 9.5 TK 22.0L 60 5 3 GOI Araçatuba 2018 12 28.46 M 9.2 TK 25.0L 39 12 4 WYA Walcha, NSW (Circular coma, opaque centre, moderately condensed, fading to edges.) 2018 12 27.46 M 9.2 TK 25.0L 39 8.7 5 WYA Walcha, NSW (Enhances in Swan Band filter. Opaque centre, fading to transparent edges.) 2018 12 14.06 S 9.0 TK 20.3T 77 7 3 GON Alto del Trichero - Soto y Amío, León 2018 12 12.04 S 8.9 TK 10.0B 20 9 3/ GOI Araçatuba 2018 12 11.05 S 9.0 TK 10.0B 20 8 3 GOI Araçatuba 2018 12 11.04 S 9.2 TK 22.0L 60 6 3/ GOI Araçatuba (Image enhancement with comet filter.) 2018 12 10.811 S 10.1 TK 32.0L 57 2.5 2 LOO Genk 2018 12 8.48 M 8.5 TK 7.0B 11 11 3/ WYA Walcha, NSW (Coma very diffuse, slight brightening to centre, weakly condensed.) 2018 12 7.955 M 9.2 TK 15.6L 24 7 3/ BOU Lauwersoog (Comet close to star of magn. 8.4.) 2018 12 7.93 S 9.6 TK 20.0L 42 4 5 SCH Eerbeek 2018 12 7.917 S 9.4 TK 15.5L 42 4.5 4/ DIJ Burlage 2018 12 7.45 M 9.0 TK 25.0L 39 10.4 5 WYA Walcha, NSW (Star of magn. 10.8 [AQ] in coma.) 2018 12 6.84 S 8.9 TK 20.3T 77 8 3/ GON Alto del Castro - Aralla, León 2018 12 6.46 M 9.4 TK 25.0L 39 10 5/ WYA Walcha, NSW (Close to star. Well condensed coma, faint stellar pseudo-nucleus visible in good seeing periods. Opaque inner coma fading to edges.) 2018 12 4.805 S 9.6 TK 15.5L 29 4 4 DIJ Burlage (Star of magn. 10.6 [AQ] in coma.) 2018 12 1.45 S 9.0 TK 7.0B 11 8.5 3 WYA Walcha, NSW (Close to stars. Enhances in Swan Band filter. Very diffuse.) 2018 12 1.39 S 9.1 TJ 40.0L 36 6 3/ YOS Kita-karuizawa, Gunma 2018 12 1.021 S 9.2 TK 8.0B 15 4 4 DIJ Burlage 2019 11 30.895 S 9.4 TK 15.6L 24 7 3 BOU Sint Annen (Some interference of star of magn. 10.1 near edge of the coma.) 2018 11 30.45 S 9.2 TK 7.0B 11 6.6 3 WYA Walcha, NSW (Coma diffuse. Close to mag 8.9 star.) 2018 11 30.41 S 9.1 TJ 40.0L 36 8 4 YOS Kita-karuizawa, Gunma (I was surprised that it became brighter and larger.) 2018 11 29.47 M 9.1 TK 25.0L 39 8.4 5/ WYA Walcha, NSW (Large transparent outer coma, gradually brightens to opaque centre, small faint stellar pseudo-nucleus visible in good seeing.) 2018 11 26.43 M 9.1 TK 25.0L 39 8.5 5/ WYA Walcha, NSW (Enhances well in Swan Band filter. Small opaque centre, faintly stellar. Large diffuse and transparent outer coma.) 2018 11 17.788 S 10.1 TK 32.0L 133 2.5 4 LOO Genk (Moonlight.) 2018 11 17.172 S 8.9 TK 15.5L 29 8 4 DIJ Burlage 2018 11 16.12 S 9.1 TK 20.3T 77 7 3/ GON Collada del Fresno - Sierra del Aramo, Asturias 2018 11 15.94 S 9.3 TK 20.0L 42 & 6 3 SCH Eerbeek 2018 11 15.776 S 10.6 TK 32.0L 133 1.5 4 LOO Genk (Moonlight.) 2018 11 15.174 S 9.2 TK 15.6L 24 7.5 2 BOU Sint Annen 2018 11 15.143 S 9.0 TK 8.0B 15 8 4 DIJ Burlage 2018 11 13.877 S 9.1 TK 8.0B 15 8 2/ BOU Sint Annen 2018 11 13.783 S 10.6 TK 32.0L 133 2.0 4 LOO Genk (Moonlight.) 2018 11 13.740 S 9.0 TK 8.0B 15 8.8 3/ DIJ Burlage (Moonlight.) 2018 11 13.14 S 9.2 TK 20.3T 77 7 3/ GON Collada del Fresno - Sierra del Aramo, Asturias 2018 11 11.851 S 9.0 TK 8.0B 15 6.5 4 DIJ Burlage 2018 11 11.44 M 9.5 TK 25.0L 39 5 4 WYA Walcha, NSW (Coma diffuse, star in coma. Moonlight.) 2018 11 11.04 S 9.7 TK 22.0L 60 5 3 GOI Araçatuba 2018 11 10.89 S 9.6 TT 40.0L 60 5 2/ FIL Jerzmanowice 2018 11 9.801 S 9.3 TK 8.0B 15 6.8 4 DIJ Burlage 2018 11 9.778 S 10.5 TK 32.0L 133 2.0 4 LOO Genk 2018 11 9.75 S 9.6 TK 20.0L 42 & 6 2 SCH Eerbeek 2018 11 9.15 S 9.2 TK 20.3T 77 7 3 GON Collada del Fresno - Sierra del Aramo, Asturias (Several stars inside the coma, the brightest being mag. 8.6 [TK].) 2018 11 8.851 S 9.5 TK 15.5L 42 5.4 4/ DIJ Burlage 2018 11 8.744 S 9.0 TK 8.0B 15 8.5 2/ BOU Lauwersoog 2018 11 8.48 M 9.2 TK 25.0L 39 8 4 WYA Walcha, NSW (Enhances in Swan Band filter. Faint tenuous outer coma, opaque inner coma with small moderately condensed centre. Faint stars in coma. Outer coma appears slightly elongated to the West approximately.) 2018 11 6.04 S 9.7 TK 22.0L 60 5 3 GOI Araçatuba 2018 11 4.04 S 9.8 TK 20.0L 42 6 1 SCH Eerbeek 2018 11 3.974 S 9.3 TK 15.6L 24 7 2/ BOU Sint Annen 2018 11 3.955 S 9.8 TK 15.5L 42 4.0 4 DIJ Burlage 2018 11 3.861 S 10.5 AC 32.0L 133 2.5 4 LOO Genk 2018 11 3.83 S 8.7 TK 10.0B 25 7 3/ GON Pandorado, León 2018 11 3.81 S 9.3 TK 20.3T 77 6 3 GON Pandorado, León 2018 11 3.64 S 9.9 TJ 40.0L 36 5 5 YOS Kita-karuizawa, Gunma (Getting brighter. Strongly condensed and easy to see.) 2018 11 3.43 M 9.9 TK 25.0L 39 6.2 3/ WYA Walcha, NSW (Low altitude 19.0°. Some interference from bright star in coma. Moderately condensed centre, opaque fading to semi-transparent outer coma.) 2018 11 2.96 S 9.8 TK 20.0L 42 5 1 SCH Eerbeek (Cirrusclouds.) 2018 11 2.822 S 10.9 AC 32.0L 133 2.0 4 LOO Genk 2018 11 2.813 S 10.0 AQ 15.5L 29 4.4 4 DIJ Burlage 2018 11 1.55 M 10.0 AQ 40.6L 76 3.5 4 CAM Katherine, NT 2018 10 30.44 M 9.9 TK 25.0L 39 8 4 WYA Walcha, NSW (Semi-transparent outer coma, opaque inner coma. Low altitude 19.3°.) 2018 10 30.06 S 10.0 TK 22.0L 60 4 2 GOI Araçatuba 2018 10 29.53 M 10.5 AQ 40.6L 76 2.0 3 CAM Katherine, NT 2018 10 29.44 M 10.0 TK 25.0L 39 6.2 4 WYA Walcha, NSW (Coma enhances in Swan Band filter. Low altitude 19.2°.) 2018 10 27.738 S 10.2 AQ 15.5L 42 3.0 3 DIJ Burlage (Magn. 12.3 star in coma and magn. 11.0 star at edge.) 2018 10 27.42 M 10.0 TK 25.0L 39 5 3/ WYA Walcha, NSW (Coma centre opaque, moderately condensed, outer coma semi-transparent. Coma centre dims in Swan Band filter. Low altitude 17.1°.) 2018 10 22.09 S 10.3 TK 22.0L 160 3 2 GOI Araçatuba (Moonlight.) 2018 10 20.15 S 9.5 TK 20.3T 77 6 3 GON Alto del Castro, León 2018 10 20.08 S 10.0 TK 20.0L 42 5 2 SCH Eerbeek 2018 10 16.111 S 11.5 AC 32.0L 133 1.5 4 LOO Genk 2018 10 16.11 S 8.9 TK 20.3T 77 7 3 GON Alto del Castro, León 2018 10 15.785 S 11.6 AC 32.0L 133 1.0 4 LOO Genk (Moonlight.) 2018 10 15.035 S 10.6 AQ 15.5L 42 3.0 3 DIJ Burlage 2018 10 13.838 S 10.6 AQ 15.5L 42 2.7 3/ DIJ Burlage 2018 10 11.56 M 10.8 AQ 40.6L 76 2.7 3/ CAM Katherine, NT 2018 10 11.12 S 11.4 TK 35.6T 98 & 2 1 SCH Bussloo 2018 10 11.024 S 10.5 AQ 15.5L 42 3.1 2/ DIJ Burlage 2018 10 10.807 S 10.5 AQ 25.4J 47 4 3 BOU Sint Annen 2018 10 10.799 S 11.7 AC 32.0L 133 1.5 4 LOO Genk 2018 10 9.826 M 10.4 AQ 25.4J 47 4.2 3/ BOU Sint Annen 2018 10 9.52 M 10.8 AQ 40.6L 76 2.5 3 CAM Katherine, NT 2018 10 8.885 S 11.4 AC 32.0L 133 1 4 LOO Genk 2018 10 8.44 M 11.2 AQ 25.0L 39 4.5 4 WYA Walcha, NSW (Does not enhance in Swan Band filter. Slight interference from glare of nearby bright star. Opaque centre, moderately condensed, sometimes appears faintly stellar in periods of good seeing. Low altitude 16.0°. Poor seeing.) 2018 10 7.877 S 11.5 AC 32.0L 133 1 3 LOO Genk 2018 10 7.838 S 10.4 AQ 15.5L 42 3.4 2/ DIJ Burlage 2018 10 7.53 M 10.8 AQ 40.6L 76 2 3 CAM Katherine, NT 2018 10 7.46 S 11.6 TJ 40.0L 75 2.3 4/ YOS Kita-karuizawa, Gunma (Larger than expected.) 2018 10 6.54 S 11.0 TJ 40.0L 75 2.2 4 YOS Kita-karuizawa, Gunma 2018 10 6.53 M 11.2 AQ 40.6L 76 2 3/ CAM Katherine, NT 2018 10 5.793 S 10.4 AQ 25.4J 47 4 2/ BOU Lauwersoog 2018 10 4.55 M 11.2 AQ 40.6L 165 2 4 CAM Katherine, NT 2018 10 3.85 S 10.2 TK 20.3T 77 6 3 GON Alto del Castro, León 2018 10 3.58 M 11.4 AQ 40.6L 76 2 4 CAM Katherine, NT 2018 10 1.56 M 11.4 AQ 40.6L 76 3 4 CAM Katherine, NT 2018 9 30.56 M 11.6 AQ 40.6L 76 2 4 CAM Katherine, NT 2018 9 19.16 S 12.2 AQ 20.3T 100 1.5 4 GON Aralla, León (Brighter inner coma diameter 1.5', providing m=12.2 [AQ]. Very faint and diffuse outer coma diameter 5', providing m=10.8:[TK].) 2018 9 18.71 M 13.1 AQ 25.0L 83 1.3 4 WYA Walcha, NSW (Low altitude 19.6°. Diffuse coma with moderately condensed centre. Sky slightly hazy due to dust.) 2018 9 17.67 S 12.2 TA 40.0L 144 1.6 5 YOS Kita-karuizawa, Gunma (Well condensed. Much brighter than expected.) 2018 9 16.68 S 13.2 TA 40.0L 144 0.8 6 YOS Kita-karuizawa, Gunma 2018 9 14.71 M 12.3 AQ 40.6L 76 1.2 3 CAM Katherine, NT 2018 9 11.72 M 12.5 AQ 40.6L 165 1.5 3 CAM Katherine, NT 2018 9 10.75 M 12.5 AQ 40.6L 76 1.8 3 CAM Katherine, NT 2018 9 10.00 S 12.5 AQ 20.3T 100 1.1 4 GON Aralla, León (Brighter inner coma diameter 1.1', providing m=12.5 [AQ]. Very faint and diffuse outer coma diameter 3', providing m=11.2: [AQ].) 2018 9 9.73 S 13.6 AQ 25.0L 83 1 3 WYA Walcha, NSW (Difficult. Very diffuse. Transparent coma, slightly brighter centre.) 2018 9 6.79 M 13.5 AQ 40.6L 165 1.0 3 CAM Katherine, NT 2018 9 5.59 M 13.6 AQ 40.6L 165 1.0 3 CAM Katherine, NT 2018 9 3.63 M 13.3 AQ 40.6L 165 1.0 3 CAM Katherine, NT 2018 9 1.89 S 20.3T 77 GON Alto del Castro, León (In evolution after the recent outburst. Inner coma magnitude was difficult to estimate due to close mag. 13.9 [AQ] star. Faint and diffuse outer coma diameter 6', providing m=11.0: [TK].) 2018 8 20.06 S 13.1 AQ 20.3T 133 1.1 4 GON Alto del Castro, León (In evolution after the recent outburst. Brighter inner coma diameter 1.1', providing m=13.1 [AQ]. Very faint and diffuse outer coma diameter 7', providing m=10.7:[TK].) 2018 8 18.25 S 13.1:AU 22.0L 160 1.25 3 GOI Araçatuba 2018 8 15.73 S 13.0 AQ 25.0L 83 1 2/ WYA Walcha, NSW (Coma very diffuse, opaque across coma, slightly brighter at centre. Post-outburst.) 2018 8 14.95 S 13.2 AQ 20.3T 200 0.6 7 GON Alto del Castro, León (In outburst. Inner coma diameter 0.6', surrounded by very faint outer coma.)