* * * 41P/Tuttle-Giacobini-Kresák * * *


Year Mn Day MM Mag Ref Scope Pwr coma DC tail p.a. Obs Site 2017 7 24.59 S 13.9 AQ 40.6L 260 1.5 1 CAM Katherine, NT 2017 7 14.97 S 10.6 TK 20.3T 77 5 2 GON Alto del Castro - Aralla, León 2017 7 2.05 S 10.7 TK 20.3T 77 5 2 GON Alto del Castro - Aralla, León 2017 6 30.63 S 11.2 AQ 25.0L 39 4.5 3 WYA Walcha, NSW (Slightly affected by background stars in coma. Coma diffuse, weakly condensed.) 2017 6 26.54 S 11.8 AQ 40.6L 76 3.5 1 CAM Katherine, NT 2017 6 26.52 S 11.5 AQ 25.0L 39 4.5 2 WYA Walcha, NSW (Coma very diffuse, slight brightening to centre.) 2017 6 24.79 S 11.5 AQ 40.6L 165 2.0 2/ CAM Katherine, NT 2017 6 22.74 S 11.1 AQ 25.0L 39 3.5 2/ WYA Walcha, NSW (Close to star.) 2017 6 21.54 S 10.4 AQ 25.0L 39 5.4 2 WYA Walcha, NSW (Very diffuse.) 2017 6 18.80 S 11.0 TK 40.6L 260 1.0 2/ CAM Katherine, NT (Moonlight.) 2017 6 14.95 S 9.5 TK 20.3T 77 5 1 GON Puerto de Aralla, León 2017 6 5.79 S 10.0 AQ 40.6L 76 3.0 2 CAM Katherine, NT 2017 5 29.73 S 9.5 TK 25.0L 39 3 3 WYA Walcha, NSW (Coma enhances in Swan Band filter. Transparent outer coma, semi-transparent inner coma.) 2017 5 27.960 S 9.3 TA 15.5L 24 7 1 BOU Burlage, Germany (Comet is becoming very diffuse. Star of magn. 10.8 in coma.) 2017 5 27.960 S 9.5 TA 15.5L 24 4 0/ DIJ Burlage 2017 5 26.960 S 9.6 TK 15.5L 29 4 0/ DIJ Burlage (Star of magn. 9.6 at edge coma.) 2017 5 25.96 S 9.0:TK 8.0B 15 &10 1 SCH Eerbeek (Weak and diffuse, difficult observation.) 2017 5 24.80 S 9.3 TK 8.0B 20 5 2/ CAM Katherine, NT 2017 5 24.09 S 7.8 TK 8.0R 20 9 2 GON Puerto de Aralla, León 2017 5 23.80 S 9.0 TK 8.0B 20 5 2 CAM Katherine, NT 2017 5 20.956 S 9.1 TK 15.5L 24 8 0/ DIJ Burlage 2017 5 20.954 S 9.0 TK 15.5L 24 8 1/ BOU Burlage, Germany 2017 5 14.922 S 8.5:TK 15.5L 24 & 9 BOU Burlage, Germany (Difficult observation due to interference from stars of magnitude 10.0 and 10.5 inside coma. Comet diffuse and still fairly large.) 2017 5 14.92 S 8.1 TK 8.0B 15 &10 4 SCH Eerbeek 2017 5 14.919 S 8.9:TK 15.5L 24 6 1/ DIJ Burlage 2017 5 8.76 S 8.3 AA 10.0B 25 8.0 1 SEA Cowra, NSW (Well enhanced using Swan Band filter. Low surface brightness.) 2017 5 6.73 M 8.8 TK 25.0L 39 9.5 3/ WYA Walcha, NSW (Outer coma large and transparent, slightly brighter but diffused inner coma.) 2017 5 4.73 S 10.6 TJ 40.0L 36 5.5 1 YOS Kita-karuizawa, Gunma (It became small now. Because other observers reported it as 7-mag recently, maybe I under-estimated it due to nearby mag. 4.3 κ Lyr.) 2017 5 3.07 S 7.0 TK 4.5R 12 15 2/ GON Puerto de Aralla, León 2017 4 30.27 S 7.6 TK 10.0B 20 12 2 GOI Araçatuba 2017 4 29.949 S 7.6 TK 15.6L 24 15 3 BOU Sint Annen 2017 4 29.89 S 7.9 TK 8.0B 15 &16 1 SCH Eerbeek 2017 4 28.73 M 8.1 TK 25.0L 39 10 4 WYA Walcha, NSW (Very tenuous and large outer coma, brightens gradually to an opaque inner coma. Enhances in Swan Band filter. Low altitude 17.2°.) 2017 4 28.07 S 7.1 TK 4.5R 12 15 2/ GON Puerto de Aralla, León 2017 4 26.97 S 7.8 TK 8.0B 15 &15 3 SCH Eerbeek 2017 4 26.917 S 7.3 TK 8.0B 15 10 4 DIJ Burlage 2017 4 26.910 S 7.5 TK 8.0B 15 12 2 BOU Sint Annen 2017 4 25.912 S 7.4 TK 8.0B 15 13 2/ BOU Sint Annen 2017 4 25.881 S 7.3 TK 8.0B 15 13 2/ DIJ Burlage 2017 4 24.059 S 9.3 AC 32.0L 57 4 2 LOO Genk 2017 4 23.898 S 7.2 TK 5.0B 10 15 1/ BOU Sint Annen 2017 4 23.89 S 7.9 TK 8.0B 15 &15 1/ SCH Eerbeek 2017 4 23.885 S 7.5 TK 8.0B 15 11 3 DIJ Burlage 2017 4 22.932 S 7.4 TK 8.0B 15 12 3 DIJ Burlage 2017 4 22.920 S 7.2 TK 5.0B 10 15 2 BOU Sint Annen 2017 4 22.26 S 6.8 TK 5.0B 7 18 2 GOI Araçatuba 2017 4 21.11 S 6.9 TK 4.5R 12 15 3 GON Puerto de Aralla, León 2017 4 19.892 S 7.3 TK 8.0B 15 16 2/ DIJ Burlage 2017 4 19.888 S 7.4 TK 15.6L 24 14 2/ BOU Sint Annen 2017 4 19.885 S 7.1 TK 5.0B 10 17 2 BOU Sint Annen 2017 4 18.895 S 7.1 TK 8.0B 15 13 3/ DIJ Burlage 2017 4 18.88 S 8.0 TK 8.0B 15 10 0 DeS Beert 2017 4 18.86 S 7.9 TK 5.6B 8 &20 2/ SCH Schluchsee, Germany 2017 4 18.014 S 7.0 TK 8.0B 15 18 3 DIJ Burlage 2017 4 17.868 S 8.5 TK 32.0L 57 5 3 LOO Genk 2017 4 15.875 S 6.8 TK 5.0B 10 18 2/ BOU Sint Annen 2017 4 15.874 S 7.1 TK 8.0B 15 19 4 DIJ Burlage 2017 4 13.861 S 7.0 TK 8.0B 15 13 4 DIJ Burlage 2017 4 13.86 S 7.2 TK 5.6B 8 &18 2 SCH Eerbeek 2017 4 12.859 S 6.9 TK 5.0B 10 16 2 BOU Sint Annen (Star of magn. 8.7 in coma.) 2017 4 12.85 S 6.2 TK 4.5R 12 17 2/ GON Puerto de Aralla, León (Astronomical twilight, before moonrise.) 2017 4 7.15 S 6.0 TK 4.5R 12 25 2/ GON Puerto de Aralla, León (Some moonlight interference.) 2017 4 5.122 S 7.0 TK 8.0B 15 18 4 DIJ Burlage 2017 4 4.13 S 7.2 TK 5.6B 8 &25 1/ SCH Eerbeek 2017 4 4.125 S 6.9 TK 5.0B 10 20 3/ DIJ Burlage (Comet close to magn. 7.7 star.) 2017 4 4.115 S 6.9 TK 5.0B 10 22 2/ BOU Sint Annen (Star of magn. 7.7 near edge of coma.) 2017 4 4.10 S 6.4 TK 4.5R 12 25 3 GON Puerto de Aralla, León 2017 4 2.865 S 8.8 AC 32.0L 57 10 2 LOO Genk (Moonlight.) 2017 4 2.146 S 8.3 AC 32.0L 57 10 2 LOO Peer 2017 4 1.974 S 7.0 TK 5.0B 10 &20 2 BOU Burlage, Germany (Some interference from two stars of magn. 8 near edge of coma.) 2017 4 1.974 S 7.0 TK 5.0B 10 20 4 DIJ Burlage 2017 4 1.16 S 6.5 TK 5.0B 10 20 3 GON Candanedo de Fenar, León 2017 3 30.937 S 6.9 TK 5.0B 10 21 2/ BOU Sint Annen 2017 3 30.88 S 7.4 TK 5.6B 8 &25 2 SCH Eerbeek 2017 3 28.986 S 7.0 TK 8.0B 15 20 4/ DIJ Burlage 2017 3 28.840 S 9.1 AC 32.0L 57 11 2 LOO Genk 2017 3 28.10 S 6.5 TK 3.0R 5 25 3 GON Collado del Fresno, Asturias 2017 3 27.87 S 7.6 TK 5.6B 8 &23 2 SCH Bussloo 2017 3 27.849 S 7.1 TK 5.0B 10 18 2/ BOU Burlage, Germany 2017 3 27.847 S 7.0 TK 5.0B 10 20 4 DIJ Burlage 2017 3 27.846 M 7.2 TK 8.0B 15 15 4 BOU Burlage, Germany 2017 3 27.844 S 7.1 TK 8.0B 15 17 4/ DIJ Burlage 2017 3 27.837 S 8.6 AC 32.0L 57 13 2 LOO Genk 2017 3 26.918 S 9.0 AC 32.0L 57 12 3 LOO Genk 2017 3 26.882 S 7.3 TK 5.0B 10 13 4 DIJ Burlage 2017 3 26.85 S 7.6 TK 5.6B 8 &20 2 SCH Eerbeek 2017 3 25.98 S 7.5 TK 5.6B 8 &20 2 SCH Eerbeek 2017 3 25.837 S 8.8 AC 32.0L 57 12 3 LOO Genk 2017 3 24.93 S 7.5 TK 5.6B 8 &20 2 SCH Bussloo 2017 3 24.92 S 7.9 TK 8.0B 15 13 2 DeS Beert 2017 3 24.862 S 7.3 TK 5.0B 10 20 4/ DIJ Burlage 2017 3 24.822 S 9.0 AC 32.0L 57 11 3 LOO Genk 2017 3 23.948 S 7.4 TK 5.0B 10 21 5 DIJ Burlage 2017 3 23.94 S 7.8 TK 8.0B 15 &18 2 SCH Eerbeek 2017 3 23.919 S 9.3 AC 32.0L 57 8 3 LOO Genk 2017 3 23.874 S 7.6 TK 8.0B 15 16 2/ BOU Sint Annen 2017 3 23.009 S 7.5 TK 8.0B 15 25 4 DIJ Burlage 2017 3 22.95 S 7.9 TK 8.0B 15 &17 2/ SCH Eerbeek 2017 3 22.827 S 9.1 TK 32.0L 57 8 3 LOO Genk 2017 3 22.58 S 7.3 TJ 7.0R 10 16 2 YOS Mt. Hanadate, Ibaraki 2017 3 22.54 S 8.3 TJ 40.0L 36 10 3/ YOS Mt. Hanadate, Ibaraki (It is very nice that the comet appears in the same field of view with Owl Nebula M97 and galaxy M108. At that time the comet was closest to M108, and the coma was overlapping on the galaxy.) 2017 3 21.825 S 7.6 TK 5.0B 10 15 2 BOU Burlage, Germany 2017 3 21.823 S 7.6 TK 5.0B 10 22 4 DIJ Burlage 2017 3 21.798 S 8.3 TK 32.0L 57 9 3 LOO Genk 2017 3 21.08 S 8.0 TK 10.0B 20 8 2 GOI Araçatuba (Comet altitude 15°.) 2017 3 20.02 S 7.5 TK 5.0B 10 20 2/ GON Puerto de Aralla, León 2017 3 18.892 S 7.7 TK 8.0B 15 15 4/ DIJ Burlage 2017 3 16.93 S 8.2 TK 8.0B 15 &12 0 SCH Bussloo (Cirrus, poor circumstances.) 2017 3 16.883 S 8.8 TK 32.0L 57 8 3 LOO Genk (Hazy sky.) 2017 3 16.88 S 9.0 TK 8.0B 15 6 1 DeS Beert 2017 3 15.89 S 7.8 TK 5.0B 10 17 2/ GON Alto del Trichero - Soto y Amío, León 2017 3 6.60 M 9.2 TK 25.0L 39 7 5 WYA Walcha, NSW (Enhances well in Swan band filter. Outer coma transparent, inner coma opaque with hints of faint stellaring in good seeing.) 2017 3 3.72 S 10.4 TJ 40.0L 36 5 3 YOS Mt. Hanadate, Ibaraki (Very bright and large. Easy to see with low magnification.) 2017 3 2.992 S 9.7 TK 15.5L 29 7.5 2/ DIJ Burlage 2017 3 2.56 S 10.0 TK 40.6L 76 4.0 2 CAM Warners Bay, NSW 2017 3 2.10 S 10.2 TK 22.0L 60 6 2 GOI Araçatuba 2017 3 1.01 S 9.1 TK 10.0B 25 7 2 GON Grandota - Oviedo, Asturias 2017 2 28.951 S 9.5 TK 15.5L 29 10 2 DIJ Burlage 2017 2 28.91 S 10.1 TK 20.0L 42 & 7 3 SCH Eerbeek 2017 2 24.90 S 9.4 TK 10.0B 25 6 2 GON Villasecino, León 2017 2 24.89 S 10.0 TK 20.3T 77 5 3 GON Villasecino, León 2017 2 24.826 S 9.7 TK 15.5L 24 8 2 BOU Burlage, Germany 2017 2 24.823 S 9.7 TK 15.5L 24 12 0/ DIJ Burlage 2017 2 23.63 M 10.5 AQ 25.0L 39 8.6 4 WYA Walcha, NSW (Opaque inner coma, transparent outer coma. Central condensation appears faintly stellar at 83x. Comet close to 10.3 magnitude star, slight interference.) 2017 2 23.56 S 10.7 AQ 40.6L 76 2.0 3 CAM Warners Bay, NSW 2017 2 22.51 M 10.8 AQ 25.0L 39 4.7 4/ WYA Walcha, NSW (Coma slightly enhances in Swan Band filter. Inner coma opaque.) 2017 2 22.12 S 11.3 AU 22.0L 160 3 2 GOI Araçatuba 2017 2 21.50 S 11.1 AQ 40.6L 165 1.8 3 CAM Warners Bay, NSW 2017 2 21.12 S 11.6 AU 22.0L 160 2.5 2 GOI Araçatuba 2017 2 20.56 S 11.0 AQ 40.6L 76 1.4 3/ CAM Warners Bay, NSW 2017 2 20.46 M 10.7 AQ 25.0L 39 5.3 4 WYA Walcha, NSW (Coma large and diffuse. Transparent outer coma, opaque inner coma. Enhances slightly in Swan Band filter.) 2017 2 19.68 S 11.1 AQ 40.6L 76 1.3 3 CAM Warners Bay, NSW 2017 2 17.70 M 11.7 AQ 25.0L 83 1.1 3/ WYA Walcha, NSW (Moonlight. Does not enhance in Swan Band filter.) 2017 2 16.84 S 10.9 TK 20.3T 77 4 2 GON Alto de la Camperona, León 2017 2 16.02 S 11.8 AU 22.0L 160 2 2 GOI Araçatuba 2017 2 15.86 S 12.0 TK 35.6T 98 &2.5 0 SCH Bussloo 2017 2 15.56 S 12.5:AQ 40.6L 165 1.0 3 CAM Warners Bay, NSW 2017 2 14.803 S 11.5 AQ 25.4J 58 2.5 1/ BOU Lauwersoog (Difficult object, very diffuse with only slight condensatiom. Close to star of magn. 11.8, 2.8' away.) 2017 2 6.78 S 13.4 TA 40.0L 144 0.8 3 YOS Mt. Hanadate, Ibaraki (Well visible. I felt it became much brighter than in January. But my measurement became similar to that in January.) 2017 2 5.71 S 12.5 AQ 40.6L 165 1.0 2 CAM Warners Bay, NSW 2017 2 4.024 S 12.2 AQ 25.4J 72 1.8 1/ BOU Sint Annen 2017 1 31.68 S 13.5 AQ 25.0L 83 0.9 3 WYA Walcha, NSW (Coma diffuse with weak central condensation. Close star of magn. 11.1, 1 away.) 2017 1 30.68 S 13.6 AQ 25.0L 83 0.8 2/ WYA Walcha, NSW (Coma diffuse. Slight elongation to SE approximately. Slight brightening to centre. Does not enhance in Swan Band filter.) 2017 1 29.71 S 13.0 AQ 40.6L 165 0.9 2 CAM Warners Bay, NSW 2017 1 29.68 S 13.9 AQ 25.0L 83 0.7 2 WYA Walcha, NSW (Coma very small and diffuse. Does not enhance in Swan Band filter. Close to mag 13.5 star, 0.8 away.) 2017 1 24.78 S 13.8 TA 40.0L 144 0.7 3 YOS Mt. Hanadate, Ibaraki (Already visible visually. Small.) 2017 1 27.68 S 13.0 AQ 40.6L 165 0.8 2 CAM Warners Bay, NSW 2017 1 24.23 S 11.5 AQ 20.3T 133 4 1/ GON Collada de la Cobertoria, Asturias 2017 1 23.64 S 13.8 AQ 25.0L 83 0.8 2 WYA Walcha, NSW (Coma very small and diffuse.)
2006 8 27.89 S 12.7 TK 20.3T 100 2 3 GON Cueto Rosales - Riello, León 2006 7 29.87 S 12.9 HS 40.7L 116 1.5 2 BIV Valdrôme 2006 7 26.87 S 11.9 HS 40.7L 58 1.5 3 BIV Valdrôme 2006 7 25.90 S 12.1 HS 40.7L 116 1.3 3 BIV Valdrôme 2006 7 21.88 S 12.5 HS 40.7L 116 1.7 3 BIV Valdrôme 2006 7 21.39 10.7 20.0L 62 3.5 3 MAT Linville, Queensland 2006 7 20.39 11.0: 20.0L 92 3 3 MAT Linville, Queensland (In close proximity to mag 10 star.) 2006 7 16.92 S 10.5 TK 20.3T 77 2.5 3 GON Villanueva de Carrizo, León 2006 6 28.94 S 10.3 TK 20.3T 77 3 3 GON Alto del Trichero - Soto y Amío, León 2006 6 21.97 S 9.7 TK 10.0B 25 5 3 GON Alto del Castro - Aralla, León 2006 6 21.95 S 10.1 TK 20.3T 77 4 3 GON Alto del Castro - Aralla, León 2006 6 21.40 S 10.5 GA 25.4L 71 4 SEA Cowra, NSW 2006 6 20.40 S 10.9 GA 25.4L 71 2 SEA Cowra, NSW (Comet enhanced through Swan Band filter.) 2006 5 30.94 S 9.8 TK 10.0B 25 5 3 GON Alto del Castro - Aralla, León 2006 5 30.92 S 10.1 TK 20.3T 77 4.0 3 GON Alto del Castro - Aralla, León (Mountain location, very clear sky.) 2006 5 25.94 S 10.2 TK 10.0B 25 4 3 GON Alto del Castro - Aralla, León 2006 5 25.92 S 10.6 TK 20.3T 77 3.0 3 GON Alto del Castro - Aralla, León 2006 5 23.938 S 11.2 TA 31.0J 72 1.5 3/ BOU Sint Annen 2006 5 18.93 S 11.4 TK 20.3T 100 2.5 3 GON Alto del Castro - Aralla, León 2006 5 4.46 S 12.4 AU 40.0L 257 0.7 3 YOS Gunma, Japan (Very close to Moon. As a result, no major outburst occurred during my stay for a week. Magnitude of my estimations had been brightening rapidly day by day. But I did not feel it was brightening rapidly at that time, because Moon had been brightening day by day at the same time.) 2006 5 2.46 S 13.1 AU 40.0L 144 1.0 3 YOS Gunma, Japan (Very close to Moon.) 2006 5 1.45 S 13.6 AU 40.0L 257 0.6 3 YOS Gunma, Japan (Very close Moon. The sky was very hazy.) 2006 4 29.888 S 12.6 AU 31.0J 109 0.4 1/ DIJ Sint Annen 2006 4 29.885 S 12.4 AU 31.0J 109 1.0 3 BOU Sint Annen 2006 4 28.94 S 12.2 TK 20.3T 100 0.8 3 GON Alto del Trichero - Soto y Amío, León (Mountain location, clear sky. Motion checked during a 30-min period.)
2001 1 28.78 [11.0 HS 20.0L 160 MAT Wallaroo, SA 2000 12 26.72 S 9.1 AA 10.0B 25 SEA The Entrance, NSW (Lower surface brightness and more diffuse than earlier observation.) 2000 12 26.236 S 8.6 TJ 15.6L 29 4.2 3/ BOU Sint Annen 2000 12 23.242 M 8.2 TJ 15.6L 36 4.0 4/ BOU Sint Annen 2000 12 22.244 S 8.0 TJ 15.6L 29 6 5 DIJ Sint Annen 2000 12 22.242 M 7.9 TJ 15.6L 29 4.5 4/ BOU Sint Annen 2000 12 19.75 S 8.6 TJ 10.0B 40 3.5 3 MAT Wallaroo, SA (Moonlight interference, comet rather diffuse) 2000 12 17.73 M 7.9 AA 10.0B 25 & 1 SEA Cowra, NSW (In moonlight, appeared small and quite intense. Visibility enhanced somewhat using Swan Band filter. The comet's appearance was similar to that of C/2000 W1 the previous evening.) 2000 12 8.76 [11.0 TJ 10.0B 40 MAT Wallaroo, SA 2000 12 3.75 [10.5 TJ 10.0B 40 MAT Wallaroo, SA