COBS - Comet OBServation database

Recent Comet Brightness Estimates

2P/Encke
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
jul 16.17, 19.5, 0.38' (K. Hills, 0.5-m Newtonian + CCD);

12P/Pons-Brooks
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
jul 26.40, 8.5, 4' (M. Mattiazzo, Swan Hill, Victoria, Australia, 15x70 Binoculars); 23.36, 8.8, 4.6' (C. Wyatt, 0.25-m Newtonian); 16.44, 8.7, 8' (A. Pearce, 0.05-m Refractor + CCD); 15.44, 8.8, 8' (A. Pearce, 0.05-m Refractor + CCD); 14.38, 8.2, 5' (M. Mattiazzo, Swan Hill, Victoria, Australia, 15x70 Binoculars); 13.44, 8.6, 9' (A. Pearce, 0.05-m Refractor + CCD); 11.73, 9.3, 3.5' (C. Harder, Capricorn, Namibia, 0.221-m Newtonian); 10.77, 8.8, 3.6' (C. Harder, Capricorn, Namibia, 0.221-m Newtonian); 10.36, 8.1, 6.6' (C. Wyatt, 0.25-m Newtonian); 09.74, 8.7, 4' (C. Harder, Capricorn, Namibia, 0.221-m Newtonian; 5.5' tail in p.a. 290 deg); 08.74, 8.8, 4.5' (C. Harder, Capricorn, Namibia, 0.221-m Newtonian; 9' tail in p.a. 295 deg); 07.74, 8.8, 4' (C. Harder, Capricorn, Namibia, 0.221-m Newtonian; 15' tail in p.a. 295 deg); 06.89, 7.9, 2' (J. de Souza Aguiar, 25x100 Binoculars); 06.74, 8.7, 4' (C. Harder, Capricorn, Namibia, 0.221-m Newtonian; 9.5' tail in p.a. 295 deg); 06.37, 8.0, 5' (M. Mattiazzo, Swan Hill, Victoria, Australia, 15x70 Binoculars); 05.92, 7.8, 4' (M. Goiato, 20x100 Binoculars); 05.74, 8.5, 4.5' (C. Harder, Capricorn, Namibia, 0.221-m Newtonian; 11' tail in p.a. 295 deg); 05.72, 8.2, 5' (G. Pappa, Namibia (remote control), 0.106-m Refractor + CCD; 10' tail); 05.44, 8.4, 8.5' (A. Pearce, 0.05-m Refractor + CCD); 04.73, 8.5, 4' (C. Harder, Capricorn, Namibia, 0.221-m Newtonian); 04.44, 8.2, 8.6' (A. Pearce, 0.05-m Refractor + CCD; 1.8' tail in p.a. 162 deg); 03.74, 8.5, 5' (C. Harder, Capricorn, Namibia, 0.221-m Newtonian; 17' tail in p.a. 295 deg); 03.44, 8.3, 9' (A. Pearce, 0.05-m Refractor + CCD; 2.4' tail in p.a. 163 deg); 02.89, 7.8, 2' (J. de Souza Aguiar, 25x100 Binoculars); 02.74, 8.3, 5' (C. Harder, Capricorn, Namibia, 0.221-m Newtonian); 02.74, 7.5, 15' (T. Lehmann, Hakos (remote), 0.106-m Refractor + CCD; 0.61° tail in p.a. 164 deg); 02.44, 8.1, 9.3' (A. Pearce, 0.05-m Refractor + CCD; 3.8' tail in p.a. 170 deg); 02.38, 7.8, 5' (M. Mattiazzo, Swan Hill, Victoria, Australia, 15x70 Binoculars); 01.90, 7.7, 3' (J. de Souza Aguiar, 25x100 Binoculars); 01.74, 8.3, 4' (C. Harder, Capricorn, Namibia, 0.221-m Newtonian; 14' tail in p.a. 294 deg); jun 30.73, 8.4, 3.4' (C. Harder, Capricorn, Namibia, 0.221-m Newtonian); 30.72, 7.9, 5' (G. Pappa, Namibia (remote control), 0.106-m Refractor + CCD; 15' tail); 30.44, 8.0, 9.3' (A. Pearce, 0.05-m Refractor + CCD; 4' tail in p.a. 169 deg); 30.36, 7.6, 5' (M. Mattiazzo, Swan Hill, Victoria, Australia, 15x70 Binoculars); 29.74, 8.3, 4' (C. Harder, Capricorn, Namibia, 0.221-m Newtonian); 29.44, 8.0, 9.3' (A. Pearce, 0.05-m Refractor + CCD; 4.1' tail in p.a. 166 deg); 28.72, 7.5, 7' (G. Pappa, Namibia (remote control), 0.106-m Refractor + CCD; 22' tail); 28.44, 7.9, 9.6' (A. Pearce, 0.05-m Refractor + CCD; 4.7' tail in p.a. 167 deg); 28.36, 7.5, 7.5' (C. Wyatt, 15x70 Binoculars; 9.5' tail in p.a. 163 deg);

13P/Olbers
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
jul 26.88, 7.0, -- (A. Russo, Gibraltar, 15x50 Binoculars); 26.86, 7.5, 7' (J. Navarro Pina, Puerto de la Cadena ( Murcia , Spain ), 20x80 Binoculars); 26.83, 8.7, -- (T. Csorgei, Blahová, 0.28-m Schmidt-Cassegrain + CCD); 25.93, 7.0, -- (T. Karhula, Virsbo, Sweden, 0.12-m Refractor); 25.92, 7.0, 11.7' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD); 25.88, 7.1, 6.8' (D. Heggie, ASERO, Trevinca, Spain, 0.094-m Refractor + CCD; 1.4° tail in p.a. 63 deg); 25.85, 7.0, -- (M. Deconinck, Artignosc-sur-Verdon, Provence, France, 10x70 Binoculars); 24.90, 7.2, 4' (C. Harder, Jeersdorf f, 0.252-m Newtonian); 24.90, 6.4, 5' (J. Gonzalez Suarez, 10x50 Binoculars; 0.6° tail in p.a. 50 deg); 24.88, 7.0, 4' (V. Gonano, Udine, Italy, 20x80 Binoculars); 23.92, 6.9, 5' (A. Scholten, Eerbeek, 15x80 Binoculars); 23.90, 6.7, 8.3' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD); 23.89, 7.0, 4' (A. Kammerer, Karlsruhe, Germany, 9x63.0 Binoculars); 23.88, 7.0, 7.6' (D. Heggie, ASERO, Trevinca, Spain, 0.094-m Refractor + CCD; 1.3° tail in p.a. 71 deg); 22.94, 7.1, 6.39' (N. James, 0.072-m Refractor + CCD); 22.88, 7.2, 2' (A. Balashov, Nizhny Novgorod, 0.042-m Camera lens + CCD; 12' tail in p.a. 90 deg); 22.88, 6.8, 2' (M. Deconinck, Artignosc-sur-Verdon, Provence, France, 40x120 Binoculars; 12' tail in p.a. 150 deg); 22.88, 7.1, 6.4' (D. Heggie, ASERO, Trevinca, Spain, 0.303-m Newtonian + CCD; 0.8° tail in p.a. 64 deg); 22.88, 7.2, 2.5' (U. Pilz, 16x70 Binoculars); 21.88, 7.1, 6.9' (D. Heggie, ASERO, Trevinca, Spain, 0.303-m Newtonian + CCD; 0.5° tail in p.a. 59 deg); 21.88, 6.9, 2.5' (V. Gonano, Udine, Italy, 20x80 Binoculars); 21.87, 6.9, -- (A. Russo, Gibraltar, 15x50 Binoculars); 21.48, 7.1, 2.2' (O. Miyazaki, 20x80 Binoculars); 20.93, 6.9, 4.5' (M. Meyer, 10x50 Binoculars); 20.88, 6.9, -- (A. Russo, Gibraltar, 15x50 Binoculars); 19.94, 6.9, 9.78' (N. James, 0.072-m Refractor + CCD); 19.93, 7.6, 12.8' (P. Dekelver, 0.3-m Newtonian + CCD; 24.4' tail in p.a. 51 deg); 19.93, 6.8, 5' (M. Meyer, 10x50 Binoculars); 18.94, 6.9, 9.02' (N. James, 0.072-m Refractor + CCD); 18.93, 6.9, 5' (M. Meyer, 10x50 Binoculars); 18.90, 6.8, 9' (M. Paradowski, Dabrowa, Poland, 0.05-m Camera lens + CCD; 0.72° tail in p.a. 60 deg); 18.88, 6.7, 9' (M. Paradowski, Dabrowa, Poland, 0.05-m Camera lens + CCD; 0.78° tail in p.a. 60 deg); 18.88, 6.7, 9' (M. Paradowski, Dabrowa, Poland, 0.05-m Camera lens + CCD; 0.5° tail in p.a. 53 deg); 18.88, 6.9, 5' (V. Gonano, Udine, Italy, 20x80 Binoculars); 18.87, 6.7, 9' (M. Paradowski, Dabrowa, Poland, 0.05-m Camera lens + CCD; 0.5° tail in p.a. 53 deg); 17.94, 6.7, 4.5' (M. Meyer, 10x50 Binoculars); 17.93, 7.1, 3.8' (V. Kasten, 20x80 Binoculars); 17.92, 7.0, 3' (C. Harder, Jeersdorf f, 0.252-m Newtonian; 7' tail in p.a. 35 deg); 17.89, 7.3, 6.7' (D. Heggie, ASERO, Trevinca, Spain, 0.303-m Newtonian + CCD; 0.4° tail in p.a. 51 deg); 16.88, 6.4, 5' (G. Scheerle, 9x63.0 Binoculars); 16.88, 6.4, 6' (G. Scheerle, 0.235-m Schmidt-Cassegrain; 0.35° tail in p.a. 60 deg); 15.88, 6.9, 4' (E. Banach, 12x60 Binoculars); 15.88, 6.9, 2.5' (P. Svozil, 10x50 Binoculars); 15.88, 6.9, 4' (V. Gonano, Udine, Italy, 20x80 Binoculars); 14.94, 6.8, 10.15' (N. James, 0.072-m Refractor + CCD); 14.89, 6.8, -- (A. Russo, Gibraltar, 15x50 Binoculars); 14.48, 6.7, 5' (J. Pile, San Rafael, Bulacan, Philippines, 0.05-m Monocular 1x); 13.95, 6.6, 5' (A. Scholten, Eerbeek, 15x80 Binoculars); 13.94, 6.8, 2.5' (B. Granslo, Arnhem, Netherlands, 0.08-m Refractor); 12.88, 6.5, 3' (V. Gonano, Udine, Italy, 20x80 Binoculars; 17° tail in p.a. 46 deg); 11.88, 6.8, 3' (P. Svozil, 10x50 Binoculars); 10.89, 6.5, 4' (P. Guzik, 10x42.0 Binoculars); 09.92, 6.3, 20' (T. Lehmann, Weimar, 0.279-m Newtonian + CCD; 0.45° tail in p.a. 46 deg); 09.91, 6.9, 3' (J. Cerny, 25x100 Binoculars; 16.8' tail in p.a. 55 deg); 09.90, 6.8, 12.2' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD); 09.89, 6.0, 28' (S. Fritsche, Koeditz, 0.1-m Refractor + CCD; 0.31° tail in p.a. 29 deg); 08.89, 6.7, 7' (V. Gonano, Udine, Italy, 20x80 Binoculars); 08.88, 6.3, 17' (S. Fritsche, Koeditz, 0.1-m Refractor + CCD; 0.31° tail in p.a. 49 deg); 08.88, 6.8, -- (A. Russo, Gibraltar, 15x50 Binoculars); 08.88, 6.7, 9' (J. Powichrowski, Knyszyn, 0.35-m Newtonian); 07.94, 6.7, 13.16' (N. James, 0.072-m Refractor + CCD); 07.91, 6.7, 12.4' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD); 07.88, 6.5, 4' (G. Scheerle, 9x63.0 Binoculars; 0.6° tail in p.a. 45 deg); 07.88, 6.2, 4' (G. Scheerle, 0.235-m Schmidt-Cassegrain; 0.2° tail in p.a. 55 deg); 07.88, 6.3, 17' (S. Fritsche, Koeditz, 0.1-m Refractor + CCD; 0.36° tail in p.a. 19 deg); 07.51, 6.2, 8.7' (K. Yoshimoto, 0.077-m Refractor + CCD; 2° tail in p.a. 50 deg); 06.94, 6.7, 12.78' (N. James, 0.072-m Refractor + CCD); 06.92, 7.2, 12.8' (P. Dekelver, 0.3-m Newtonian + CCD; 24.4' tail in p.a. 55 deg); 06.92, 6.5, 9' (M. Paradowski, Dabrowa, Poland, 0.05-m Camera lens + CCD; 0.58° tail in p.a. 55 deg); 06.91, 6.5, 5.6' (M. Paradowski, Dabrowa, Poland, 0.05-m Camera lens + CCD; 0.37° tail in p.a. 56 deg); 06.86, 8.1, -- (T. Csorgei, Blahová, 0.27-m Schmidt-Cassegrain + CCD); 05.92, 6.7, 3' (V. Gonano, Udine, Italy, 20x80 Binoculars; 5' tail in p.a. 74 deg); 05.88, 6.5, 9.3' (S. Fritsche, Koeditz, 0.1-m Refractor + CCD; 0.23° tail in p.a. 51 deg); 05.49, 6.8, 4' (Y. Sugiyama, 0.12-m Refractor); 05.48, 6.3, 4' (J. Pile, San Rafael, Bulacan, Philippines, 0.05-m Monocular 1x; 5' tail in p.a. 75 deg); 04.91, 6.4, 5.5' (A. Kammerer, Voelkersbach (Black Forest), Germany, 9x63.0 Binoculars; 0.25° tail in p.a. 55 deg); 04.89, 7.0, 7.5' (J. Chambó Bris, Nerpio, Spain, 0.25-m Newtonian + CCD; 1° tail in p.a. 48 deg); 04.48, 6.7, 4' (Y. Sugiyama, 0.12-m Refractor); 03.90, 6.6, 9' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD); 02.90, 6.8, 9.6' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD); 02.90, 6.9, 5.6' (M. Paradowski, 0.068-m Refractor + CCD; 0.24° tail in p.a. 57 deg); 02.89, 6.8, 5.6' (M. Paradowski, 0.068-m Refractor + CCD; 0.36° tail in p.a. 51 deg); 02.89, 6.8, 5.6' (M. Paradowski, 0.068-m Refractor + CCD; 0.25° tail in p.a. 59 deg); 01.91, 7.3, 12.8' (P. Dekelver, 0.3-m Newtonian + CCD; 21.6' tail in p.a. 56 deg); 01.91, 6.1, 5' (J. Gonzalez Suarez, 10x50 Binoculars; 0.8° tail in p.a. 50 deg); 01.90, 6.6, 10.7' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD); 01.90, 6.4, 4' (C. Labordena, Culla, 11x80 Binoculars; 25' tail); 01.89, 6.6, 4' (C. Labordena, Culla, 11x80 Binoculars; 18' tail); 01.89, 6.2, 3' (V. Gonano, Udine, Italy, 20x80 Binoculars; 0.8° tail in p.a. 50 deg); 01.47, 6.7, 4' (J. Pile, San Rafael, Bulacan, Philippines, 0.05-m Monocular 1x); 01.00, 6.9, 11.7' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD); jun 30.83, 6.8, 3' (G. Pappa, Pedara,Sicily,Italy, 0.3-m Camera lens + CCD; 10' tail); 29.95, 6.8, 9.4' (N. James, 0.072-m Refractor + CCD); 29.92, 6.5, 4.2' (M. Paradowski, 0.068-m Refractor + CCD; 0.14° tail in p.a. 60 deg); 29.92, 6.6, 4.2' (M. Paradowski, 0.068-m Refractor + CCD; 0.14° tail in p.a. 60 deg); 29.91, 6.1, 11.7' (M. Mašek, 0.25-m Schmidt-Cassegrain + CCD; 16.7' tail in p.a. 54 deg); 29.91, 6.6, 11.7' (M. Mašek, 0.25-m Schmidt-Cassegrain + CCD; 16.3' tail in p.a. 53 deg); 29.90, 6.5, 4.2' (M. Paradowski, 0.068-m Refractor + CCD; 0.12° tail in p.a. 60 deg); 29.90, 6.2, 4' (P. Pérez Corujo, Vega de San Mateo Gran Canaria, 15x70 Binoculars; 3° tail); 29.89, 6.8, 5' (V. Díaz, La Romana, Alicante, Spain, 20x80 Binoculars); 29.89, 6.4, 4' (P. Pérez Corujo, Vega de San Mateo Gran Canaria, 25x100 Binoculars; 2° tail); 29.83, 6.6, 4' (N. Virnina, Odessa, Ukraine, 0.2-m Newtonian); 29.48, 7.0, 4' (O. Miyazaki, 20x80 Binoculars; 44' tail in p.a. 233 deg); 28.97, 6.7, 5.4' (M. Collins, Everton, 0.103-m Refractor); 28.95, 6.8, 3' (A. Scholten, Eerbeek, 0.2-m Newtonian); 28.94, 6.7, 10.15' (N. James, 0.072-m Refractor + CCD); 28.93, 7.5, 12.8' (P. Dekelver, 0.3-m Newtonian + CCD; 22.3' tail in p.a. 60 deg); 28.92, 6.4, 4' (P. De Schrijver, Beert, 25x100 Binoculars); 28.85, 6.7, 3' (V. Gonano, Udine, Italy, 20x80 Binoculars); 28.83, 7.2, 5' (G. Pappa, Pedara,Sicily,Italy, 0.3-m Camera lens + CCD; 10' tail); 27.94, 6.7, 10.53' (N. James, 0.072-m Refractor + CCD); 27.90, 6.4, 4' (G. Scheerle, 9x63.0 Binoculars);

37P/Forbes
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
jul 26.78, 16.3, 0.5' (A. Pearce, 0.5-m Schmidt-Cassegrain + CCD; 0.4' tail in p.a. 120 deg); 08.90, 17.3, 0.38' (K. Hills, 0.5-m Newtonian + CCD); 08.75, 16.2, 0.4' (A. Pearce, 0.5-m Schmidt-Cassegrain + CCD; 0.5' tail in p.a. 124 deg); 06.92, 17.2, 0.4' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD); 06.74, 16.4, 0.4' (A. Pearce, 0.5-m Schmidt-Cassegrain + CCD; 0.8' tail in p.a. 121 deg);

65P/Gunn
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
jul 08.92, 17.4, 0.38' (K. Hills, 0.5-m Newtonian + CCD); 04.47, 16.2, 0.8' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD); 01.92, 17.4, 0.38' (K. Hills, 0.5-m Newtonian + CCD); jun 29.80, 16.4, 1.2' (T. Lehmann, Hakos (remote), 0.106-m Refractor + CCD); 28.96, 16.4, 0.4' (P. Dekelver, 0.3-m Newtonian + CCD);

89P/Russell
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
jul 16.10, 17.4, 0.4' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD); 14.00, 17.1, 0.3' (A. Pearce, 0.5-m Schmidt-Cassegrain + CCD; 0.5' tail in p.a. 232 deg); 12.09, 17.5, 0.4' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD); 11.95, 16.9, 0.5' (A. Pearce, 0.5-m Schmidt-Cassegrain + CCD); 09.95, 16.8, 0.5' (A. Pearce, 0.5-m Schmidt-Cassegrain + CCD); 07.02, 16.9, 0.5' (A. Pearce, 0.5-m Schmidt-Cassegrain + CCD); 05.96, 16.8, 0.4' (A. Pearce, 0.5-m Schmidt-Cassegrain + CCD; 0.2' tail in p.a. 208 deg);

125P/Spacewatch
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
jul 14.14, 18.2, 0.38' (K. Hills, 0.5-m Newtonian + CCD); 14.10, 17.9, 0.4' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD); 10.07, 17.8, 0.4' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD); 10.04, 18.0, 0.5' (S. Fritsche, Koeditz, 0.1-m Refractor + CCD); 05.70, 17.7, 0.3' (K. Yoshimoto, 0.203-m Ritchey-Chretien + CCD; 1.5' tail in p.a. 255 deg); 04.11, 17.8, 0.4' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD); 03.90, 18.2, 0.3' (A. Pearce, 0.5-m Schmidt-Cassegrain + CCD; 0.5' tail in p.a. 242 deg); 02.18, 18.2, 0.38' (K. Hills, 0.5-m Newtonian + CCD);

130P/McNaught-Hughes
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
jul 17.05, 15.4, 0.6' (A. Pearce, 0.5-m Schmidt-Cassegrain + CCD; 0.7' tail in p.a. 240 deg); 16.07, 15.5, 0.6' (A. Pearce, 0.5-m Schmidt-Cassegrain + CCD; 1.4' tail in p.a. 243 deg); 14.12, 14.3, 1.5' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD); 14.05, 15.6, 0.4' (A. Pearce, 0.5-m Schmidt-Cassegrain + CCD; 1.7' tail in p.a. 245 deg); 12.06, 15.5, 0.5' (A. Pearce, 0.5-m Schmidt-Cassegrain + CCD; 1.1' tail in p.a. 237 deg); 11.12, 15.6, 0.55' (C. Harder, Capricorn, Namibia, 0.508-m Newtonian); 10.13, 14.9, 1.1' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD); 09.06, 15.3, 0.5' (A. Pearce, 0.5-m Schmidt-Cassegrain + CCD; 0.7' tail in p.a. 225 deg); 07.06, 15.6, 0.4' (A. Pearce, 0.5-m Schmidt-Cassegrain + CCD; 1' tail in p.a. 240 deg); 07.05, 14.8, 0.7' (P. Dekelver, 0.3-m Newtonian + CCD; 2.6' tail in p.a. 250 deg); 04.13, 13.9, 1.3' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD); 02.14, 14.9, 0.8' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD); 02.07, 16.0, 0.5' (A. Pearce, 0.5-m Schmidt-Cassegrain + CCD; 0.8' tail in p.a. 237 deg);

144P/Kushida
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
jun 29.73, 14.9, 2.7' (T. Lehmann, Hakos (remote), 0.106-m Refractor + CCD);

146P/Shoemaker-LINEAR
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
jul 27.09, 14.7, 0.7' (A. Pearce, 0.5-m Schmidt-Cassegrain + CCD; 0.4' tail in p.a. 223 deg); 19.09, 15.2, 0.5' (A. Pearce, 0.5-m Schmidt-Cassegrain + CCD); 17.17, 15.3, 0.6' (A. Pearce, 0.5-m Schmidt-Cassegrain + CCD; 0.7' tail in p.a. 232 deg); 16.08, 15.3, 0.6' (A. Pearce, 0.5-m Schmidt-Cassegrain + CCD; 0.7' tail in p.a. 234 deg); 12.08, 15.0, 1' (G. Pappa, Namibia (remote control), 0.106-m Refractor + CCD);

154P/Brewington
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
jul 25.14, 14.5, 1.1' (D. Heggie, ASERO, Trevinca, Spain, 0.303-m Newtonian + CCD); 16.14, 13.0, 1.9' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD); 14.14, 13.3, 1.5' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD); 12.14, 13.4, 1.7' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD); 04.14, 13.8, 1.2' (J. Ryske, 0.3-m Ritchey-Chretien + CCD); 02.10, 10.1, 3.5' (J. Gonzalez Suarez, Alto del Castro, 1720 m, Leon, Spain, 0.203-m Schmidt-Cassegrain);

208P/McMillan
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
jul 08.33, 19.7, -- (J. Maikner, Comet Hunter Observatory2, New Ringgold, 0.305-m Hyperboloid astro-camera + CCD);

219P/LINEAR
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
jul 12.11, 19.3, 0.4' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);

227P/Catalina-LINEAR
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
jul 02.90, 18.8, 0.38' (K. Hills, 0.5-m Newtonian + CCD);

251P/LINEAR
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
jul 19.23, 20.8, -- (J. Maikner, Comet Hunter Observatory2, New Ringgold, 0.305-m Hyperboloid astro-camera + CCD);

253P/PANSTARRS
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
jul 19.32, 18.8, -- (J. Maikner, Comet Hunter Observatory2, New Ringgold, 0.305-m Hyperboloid astro-camera + CCD);

299P/Catalina-PANSTARRS
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
jul 13.81, 15.5, 0.3' (A. Pearce, 0.5-m Schmidt-Cassegrain + CCD); 12.74, 16.1, 0.6' (A. Pearce, 0.5-m Schmidt-Cassegrain + CCD); 11.77, 15.6, 0.7' (G. Pappa, Namibia (remote control), 0.106-m Refractor + CCD); 08.75, 15.8, 0.4' (A. Pearce, 0.5-m Schmidt-Cassegrain + CCD; 0.2' tail in p.a. 125 deg); 07.91, 17.0, 0.38' (K. Hills, 0.5-m Newtonian + CCD); 07.00, 16.2, 0.4' (A. Pearce, 0.5-m Schmidt-Cassegrain + CCD); jun 29.94, 16.8, 0.38' (K. Hills, 0.5-m Newtonian + CCD); 28.45, 15.8, 0.7' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD);

362P
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
jul 04.90, 17.7, 0.38' (K. Hills, 0.5-m Newtonian + CCD); 02.00, 17.3, 0.4' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD); jun 28.03, 17.6, 0.38' (K. Hills, 0.5-m Newtonian + CCD);

468P/SidingSpring
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
jul 19.32, 19.5, -- (J. Maikner, Comet Hunter Observatory2, New Ringgold, 0.305-m Hyperboloid astro-camera + CCD);

479P/Elenin
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
jul 09.84, 14.6, 0.5' (C. Harder, Capricorn, Namibia, 0.508-m Newtonian); 08.83, 15.8, 0.2' (C. Harder, Capricorn, Namibia, 0.508-m Newtonian); 07.84, 16.1, 0.2' (C. Harder, Capricorn, Namibia, 0.508-m Newtonian); 04.47, 16.1, 1' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD); 02.87, 16.0, -- (C. Harder, Capricorn, Namibia, 0.508-m Newtonian); jun 29.82, 13.2, 5.5' (T. Lehmann, Hakos (remote), 0.106-m Refractor + CCD);

C/2014 UN271 (Bernardinelli-Bernstein)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
jul 14.43, 15.9, 0.6' (K. Yoshimoto, 0.25-m Newtonian + CCD);

C/2019 T4 (ATLAS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
jul 19.09, 17.8, 4' (J. Maikner, Comet Hunter Observatory2, New Ringgold, 0.305-m Hyperboloid astro-camera + CCD); 17.06, 16.2, 1' (S. Fritsche, Koeditz, 0.1-m Refractor + CCD); 17.04, 16.5, 0.4' (M. Paling, Appledorne Observatory, 0.123-m Refractor + CCD); 13.96, 17.9, 0.38' (K. Hills, 0.5-m Newtonian + CCD); 10.01, 15.7, 1.3' (S. Fritsche, Koeditz, 0.1-m Refractor + CCD); 10.01, 17.5, 0.4' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD); 09.00, 15.6, 1.8' (S. Fritsche, Koeditz, 0.1-m Refractor + CCD; 0.05° tail in p.a. 245 deg); 06.95, 15.4, 1.1' (P. Dekelver, 0.3-m Newtonian + CCD; 2.6' tail in p.a. 244 deg); 06.01, 15.5, 1.7' (S. Fritsche, Koeditz, 0.1-m Refractor + CCD; 0.05° tail in p.a. 247 deg); 05.04, 16.9, 0.56' (K. Hills, 0.5-m Newtonian + CCD); 04.06, 16.2, 0.8' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD); jun 30.98, 16.4, 0.6' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);

C/2020 K1 (PANSTARRS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
jul 20.19, 16.3, 0.4' (A. Pearce, 0.5-m Schmidt-Cassegrain + CCD);

C/2020 V2 (ZTF)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
jul 16.95, 14.0, 0.9' (A. Pearce, 0.5-m Schmidt-Cassegrain + CCD); 16.04, 14.1, 0.9' (A. Pearce, 0.5-m Schmidt-Cassegrain + CCD); 13.96, 13.9, 1' (A. Pearce, 0.5-m Schmidt-Cassegrain + CCD); 12.11, 14.1, 0.9' (A. Pearce, 0.5-m Schmidt-Cassegrain + CCD); 12.00, 14.1, 1' (C. Harder, Capricorn, Namibia, 0.508-m Newtonian); 11.04, 14.3, 0.7' (C. Harder, Capricorn, Namibia, 0.508-m Newtonian); 10.97, 14.0, 1' (A. Pearce, 0.5-m Schmidt-Cassegrain + CCD); 10.07, 14.1, 1' (C. Harder, Capricorn, Namibia, 0.508-m Newtonian); 08.97, 14.2, 0.8' (A. Pearce, 0.5-m Schmidt-Cassegrain + CCD); 07.12, 14.6, 0.65' (C. Harder, Capricorn, Namibia, 0.508-m Newtonian); 07.00, 14.3, 0.8' (A. Pearce, 0.5-m Schmidt-Cassegrain + CCD); 06.15, 14.1, 0.6' (C. Harder, Capricorn, Namibia, 0.508-m Newtonian); 04.96, 14.9, 0.3' (C. Harder, Capricorn, Namibia, 0.508-m Newtonian); 04.13, 14.2, 0.4' (C. Harder, Capricorn, Namibia, 0.508-m Newtonian); 04.13, 13.6, 2.6' (T. Lehmann, Hakos (remote), 0.106-m Refractor + CCD; 0.24° tail in p.a. 18 deg); 03.99, 14.5, 0.8' (A. Pearce, 0.5-m Schmidt-Cassegrain + CCD); 03.12, 14.2, 0.55' (C. Harder, Capricorn, Namibia, 0.508-m Newtonian); 01.99, 14.5, 0.7' (A. Pearce, 0.5-m Schmidt-Cassegrain + CCD); 01.96, 14.0, 0.8' (C. Harder, Capricorn, Namibia, 0.508-m Newtonian);

C/2021 G2 (Atlas)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
jul 26.79, 14.2, 0.9' (A. Pearce, 0.5-m Schmidt-Cassegrain + CCD); 12.74, 13.9, 0.7' (A. Pearce, 0.5-m Schmidt-Cassegrain + CCD); 10.85, 14.0, 0.9' (C. Harder, Capricorn, Namibia, 0.508-m Newtonian); 09.83, 14.1, 0.7' (C. Harder, Capricorn, Namibia, 0.508-m Newtonian); 09.73, 14.2, 0.9' (A. Pearce, 0.5-m Schmidt-Cassegrain + CCD; 3.3' tail in p.a. 239 deg); 08.80, 14.3, 0.7' (C. Harder, Capricorn, Namibia, 0.508-m Newtonian); 07.78, 14.1, 0.9' (C. Harder, Capricorn, Namibia, 0.508-m Newtonian); 06.82, 13.9, 0.6' (C. Harder, Capricorn, Namibia, 0.508-m Newtonian); 05.81, 14.1, 1' (C. Harder, Capricorn, Namibia, 0.508-m Newtonian); 04.81, 14.1, 0.9' (C. Harder, Capricorn, Namibia, 0.508-m Newtonian); 04.46, 13.9, 1.5' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD; 1.1' tail in p.a. 227 deg); 03.78, 13.8, 1.1' (C. Harder, Capricorn, Namibia, 0.508-m Newtonian); 03.48, 14.0, 1.3' (A. Pearce, 0.05-m Refractor + CCD); 02.78, 14.5, 0.7' (C. Harder, Capricorn, Namibia, 0.508-m Newtonian); 02.48, 14.4, 1.4' (A. Pearce, 0.05-m Refractor + CCD); 01.77, 14.8, 0.65' (C. Harder, Capricorn, Namibia, 0.508-m Newtonian); jun 30.77, 13.6, 0.5' (C. Harder, Heimat, Namibia, 0.221-m Newtonian); 30.48, 13.8, 1.4' (A. Pearce, 0.05-m Refractor + CCD); 29.78, 14.0, 1.4' (T. Lehmann, Hakos (remote), 0.106-m Refractor + CCD; 0.05° tail in p.a. 243 deg); 29.48, 13.7, 1.4' (A. Pearce, 0.05-m Refractor + CCD); 28.58, 13.8, 1.3' (A. Pearce, 0.05-m Refractor + CCD); 28.53, 14.3, 1' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD);

C/2021 S3 (PANSTARRS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
jul 26.86, 14.5, -- (T. Csorgei, Blahová, 0.28-m Schmidt-Cassegrain + CCD); 20.97, 12.9, 1.5' (M. Mašek, 0.2-m Newtonian + CCD; 1.3' tail in p.a. 208 deg); 19.98, 13.1, 1.8' (P. Dekelver, 0.3-m Newtonian + CCD); 17.06, 13.6, 1.5' (K. Hills, 0.5-m Newtonian + CCD); 16.96, 12.7, 4.4' (S. Fritsche, Koeditz, 0.1-m Refractor + CCD; 0.13° tail in p.a. 231 deg); 16.03, 12.1, -- (M. Paling, Appledorne Observatory, 0.123-m Refractor + CCD); 14.07, 13.1, 1.7' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD); 10.91, 12.5, 2.4' (E. Bryssinck, 0.4-m Newtonian + CCD); 10.14, 12.9, 2.63' (K. Hills, 0.5-m Newtonian + CCD); 10.03, 13.2, 1.5' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD); 10.02, 12.6, 3.4' (T. Lehmann, Weimar, 0.279-m Newtonian + CCD; 0.24° tail in p.a. 244 deg); 09.96, 12.6, 4.5' (S. Fritsche, Koeditz, 0.1-m Refractor + CCD; 0.14° tail in p.a. 239 deg); 08.96, 12.4, 5.5' (S. Fritsche, Koeditz, 0.1-m Refractor + CCD; 0.17° tail in p.a. 235 deg); 08.55, 12.4, 0.7' (O. Miyazaki, 0.32-m Newtonian); 08.24, 14.2, -- (J. Maikner, Comet Hunter Observatory2, New Ringgold, 0.305-m Hyperboloid astro-camera + CCD); 06.97, 12.8, 1.8' (P. Dekelver, 0.3-m Newtonian + CCD; 19.6' tail in p.a. 257 deg); 06.87, 15.0, -- (T. Csorgei, Blahová, 0.27-m Schmidt-Cassegrain + CCD); 06.60, 12.2, 1.2' (K. Yoshimoto, 0.203-m Ritchey-Chretien + CCD; 8' tail in p.a. 240 deg); 05.96, 13.0, 2.4' (S. Fritsche, Koeditz, 0.1-m Refractor + CCD; 0.08° tail in p.a. 240 deg); 04.09, 12.7, 2.8' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD); 03.96, 12.4, 1.7' (J. Chambó Bris, Valles, Valencia, Spain, 0.2-m Newtonian + CCD; 4.1' tail in p.a. 237 deg); 01.02, 12.6, 3.4' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD); jun 30.96, 13.0, 1.7' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD); 29.55, 12.2, 0.8' (O. Miyazaki, 0.32-m Newtonian); 29.28, 14.7, 0.1' (G. Navas, Llano del Hato, Mérida Venezuela, 1-m Cassegrain reflector + CCD); 29.02, 12.3, 3.7' (P. Dekelver, 0.3-m Newtonian + CCD; 19.7' tail in p.a. 263 deg); 28.12, 13.1, 1.88' (K. Hills, 0.5-m Newtonian + CCD); 27.92, 13.3, 1.2' (M. Mašek, 0.25-m Schmidt-Cassegrain + CCD; 1.4' tail in p.a. 233 deg); 27.92, 12.7, 1.2' (M. Mašek, 0.25-m Schmidt-Cassegrain + CCD; 1.2' tail in p.a. 229 deg);

C/2021 T4 (Lemmon)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
jul 21.55, 16.3, 0.4' (K. Yoshimoto, 0.203-m Ritchey-Chretien + CCD; 0.8' tail in p.a. 240 deg);

C/2021 X1 (Maury-Attard)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
jul 19.16, 17.7, 1.5' (J. Maikner, Comet Hunter Observatory2, New Ringgold, 0.305-m Hyperboloid astro-camera + CCD; 2.5" tail in p.a. 140 deg); 14.16, 18.5, 0.38' (K. Hills, 0.5-m Newtonian + CCD); 10.05, 18.3, 0.4' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);

C/2022 L2 (ATLAS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
jul 11.73, 16.0, 0.4' (A. Pearce, 0.5-m Schmidt-Cassegrain + CCD); 08.79, 15.5, 1.4' (T. Lehmann, Hakos (remote), 0.106-m Refractor + CCD; 2' tail in p.a. 109 deg); 08.76, 15.7, 0.4' (A. Pearce, 0.5-m Schmidt-Cassegrain + CCD); 08.76, 15.7, -- (C. Harder, Capricorn, Namibia, 0.508-m Newtonian); 07.76, 16.0, -- (C. Harder, Capricorn, Namibia, 0.508-m Newtonian); 06.75, 15.6, -- (C. Harder, Capricorn, Namibia, 0.508-m Newtonian); 04.75, 16.2, -- (C. Harder, Capricorn, Namibia, 0.508-m Newtonian); 03.77, 15.2, -- (C. Harder, Capricorn, Namibia, 0.508-m Newtonian); 03.48, 15.5, 0.7' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD); 02.77, 15.1, 1.6' (T. Lehmann, Hakos (remote), 0.106-m Refractor + CCD; 1.5' tail in p.a. 98 deg); 02.77, 15.1, 0.4' (C. Harder, Capricorn, Namibia, 0.508-m Newtonian); 01.77, 16.2, -- (C. Harder, Capricorn, Namibia, 0.508-m Newtonian);

C/2022 N2 (PANSTARRS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
jul 17.02, 15.8, 0.9' (S. Fritsche, Koeditz, 0.1-m Refractor + CCD; 1.1' tail in p.a. 244 deg); 16.19, 16.7, 0.38' (K. Hills, 0.5-m Newtonian + CCD); 16.08, 16.4, 0.4' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD); 15.92, 15.7, 0.5' (A. Pearce, 0.5-m Schmidt-Cassegrain + CCD); 15.21, 16.7, 0.38' (K. Hills, 0.5-m Newtonian + CCD); 13.99, 16.1, 0.4' (A. Pearce, 0.5-m Schmidt-Cassegrain + CCD; 0.7' tail in p.a. 230 deg); 11.93, 15.9, 0.5' (A. Pearce, 0.5-m Schmidt-Cassegrain + CCD; 0.4' tail in p.a. 221 deg); 10.09, 16.4, 0.4' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD); 09.94, 16.1, 0.4' (A. Pearce, 0.5-m Schmidt-Cassegrain + CCD; 0.3' tail in p.a. 214 deg); 09.04, 16.3, 0.9' (S. Fritsche, Koeditz, 0.1-m Refractor + CCD); 07.02, 16.1, 0.5' (A. Pearce, 0.5-m Schmidt-Cassegrain + CCD; 0.5' tail in p.a. 221 deg); 05.95, 16.2, 0.4' (A. Pearce, 0.5-m Schmidt-Cassegrain + CCD); 01.12, 16.6, 0.4' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD); 01.03, 16.1, 0.9' (T. Lehmann, Hakos (remote), 0.106-m Refractor + CCD; 1' tail in p.a. 247 deg);

C/2022 S4 (Lemmon)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
jul 07.18, 17.4, 0.3' (A. Pearce, 0.5-m Schmidt-Cassegrain + CCD);

C/2022 U1 (Leonard)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
jul 20.02, 16.1, 0.3' (P. Dekelver, 0.3-m Newtonian + CCD); 14.13, 17.0, 0.38' (K. Hills, 0.5-m Newtonian + CCD); 07.02, 18.0, -- (T. Csorgei, Blahová, 0.27-m Schmidt-Cassegrain + CCD); 07.01, 16.1, 0.3' (P. Dekelver, 0.3-m Newtonian + CCD); 01.10, 17.8, 0.4' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);

C/2023 A3 (Tsuchinshan-ATLAS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
jul 26.38, 9.0, 3' (M. Mattiazzo, Swan Hill, Victoria, Australia, 15x70 Binoculars); 24.90, 9.3, 4' (V. Gonano, Udine, Italy, 20x80 Binoculars); 23.35, 9.3, 2.5' (C. Wyatt, 15x70 Binoculars); 23.35, 9.5, 1.9' (C. Wyatt, 0.25-m Newtonian; 15' tail in p.a. 98 deg); 22.36, 9.1, 2.1' (C. Wyatt, 15x70 Binoculars); 21.99, 9.4, 3' (K. Yoshimoto, 0.065-m Refractor + CCD; 20' tail in p.a. 100 deg); 21.90, 10.3, 3' (V. Gonano, Udine, Italy, 20x80 Binoculars; 20' tail in p.a. 100 deg); 21.72, 10.3, 3' (A. Pearce, 0.106-m Refractor + CCD; 20' tail in p.a. 100 deg); 20.72, 10.3, 3' (A. Pearce, 0.106-m Refractor + CCD; 20.4' tail in p.a. 101 deg); 19.72, 10.4, 2.5' (A. Pearce, 0.106-m Refractor + CCD; 21.2' tail in p.a. 100 deg); 18.90, 10.5, 2.5' (V. Gonano, Udine, Italy, 20x80 Binoculars; 23' tail in p.a. 101 deg); 18.72, 10.4, 2.5' (A. Pearce, 0.106-m Refractor + CCD; 22.9' tail in p.a. 101 deg); 16.72, 10.4, 2.8' (A. Pearce, 0.106-m Refractor + CCD; 26' tail in p.a. 100 deg); 16.47, 10.5, 2.6' (A. Pearce, 0.05-m Refractor + CCD; 14.9' tail in p.a. 99 deg); 15.90, 10.0, 2.5' (V. Gonano, Udine, Italy, 20x80 Binoculars; 23' tail in p.a. 100 deg); 15.47, 10.6, 2.4' (A. Pearce, 0.05-m Refractor + CCD; 13.9' tail in p.a. 100 deg); 14.78, 10.1, 2.5' (A. Pearce, 0.106-m Refractor + CCD; 26.5' tail in p.a. 99 deg); 14.39, 9.5, 2' (M. Mattiazzo, Swan Hill, Victoria, Australia, 15x70 Binoculars); 13.72, 10.0, 2' (G. Pappa, Namibia (remote control), 0.106-m Refractor + CCD; 18' tail); 13.47, 10.5, 2.6' (A. Pearce, 0.05-m Refractor + CCD; 19.3' tail in p.a. 100 deg); 12.90, 10.0, 2.5' (V. Gonano, Udine, Italy, 20x80 Binoculars; 15° tail in p.a. 100 deg); 12.72, 10.5, 2.2' (A. Pearce, 0.106-m Refractor + CCD; 15.5' tail in p.a. 101 deg); 11.74, 10.3, 1.1' (C. Harder, Capricorn, Namibia, 0.221-m Newtonian; 4.5' tail in p.a. 105 deg); 11.72, 10.4, 2.8' (A. Pearce, 0.106-m Refractor + CCD; 15.1' tail in p.a. 100 deg); 10.78, 10.4, 1' (C. Harder, Capricorn, Namibia, 0.221-m Newtonian; 6.5' tail in p.a. 100 deg); 10.35, 9.6, 2.5' (C. Wyatt, 0.25-m Newtonian; 18' tail in p.a. 104 deg); 09.74, 10.4, 1.6' (C. Harder, Capricorn, Namibia, 0.221-m Newtonian; 11' tail in p.a. 110 deg); 09.37, 9.7, 2.1' (C. Wyatt, 15x70 Binoculars); 08.90, 9.7, 3' (V. Gonano, Udine, Italy, 20x80 Binoculars); 08.81, 9.6, 6' (T. Lehmann, Hakos (remote), 0.106-m Refractor + CCD; 0.38° tail in p.a. 99 deg); 08.75, 10.1, 1.2' (C. Harder, Capricorn, Namibia, 0.221-m Newtonian; 14' tail in p.a. 105 deg); 07.75, 10.0, 1.7' (C. Harder, Capricorn, Namibia, 0.221-m Newtonian; 12' tail in p.a. 115 deg); 06.92, 10.0, 4' (J. de Souza Aguiar, 0.27-m Newtonian); 06.90, 10.5, 2.8' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD); 06.75, 10.4, 1.7' (C. Harder, Capricorn, Namibia, 0.221-m Newtonian; 10' tail in p.a. 100 deg); 06.38, 9.7, 2' (M. Mattiazzo, Swan Hill, Victoria, Australia, 15x70 Binoculars); 05.94, 10.7, 2.3' (V. Gonano, Udine, Italy, 20x80 Binoculars; 15' tail in p.a. 100 deg); 05.90, 10.4, 2.4' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD); 05.74, 10.4, 1.5' (C. Harder, Capricorn, Namibia, 0.221-m Newtonian; 12' tail in p.a. 100 deg); 04.90, 10.7, 2.4' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD); 04.79, 10.4, 2' (C. Harder, Capricorn, Namibia, 0.221-m Newtonian; 12' tail in p.a. 105 deg); 04.46, 10.9, 2.2' (A. Pearce, 0.05-m Refractor + CCD; 13.3' tail in p.a. 100 deg); 04.45, 11.4, 1.1' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD; 5' tail in p.a. 102 deg); 04.03, 11.9, 0.9' (G. Navas, Llano del Hato, Mérida Venezuela, 1-m Cassegrain reflector + CCD; 210.1" tail); 03.91, 10.5, 2.8' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD); 03.75, 10.2, 1.8' (C. Harder, Capricorn, Namibia, 0.221-m Newtonian; 14' tail in p.a. 105 deg); 03.46, 11.0, 2.2' (A. Pearce, 0.05-m Refractor + CCD; 14.3' tail in p.a. 100 deg); 02.92, 10.6, 2.8' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD); 02.91, 10.0, 4' (J. de Souza Aguiar, 0.27-m Newtonian); 02.75, 9.7, 7' (T. Lehmann, Hakos (remote), 0.106-m Refractor + CCD; 0.37° tail in p.a. 99 deg); 02.75, 10.4, 1.6' (C. Harder, Capricorn, Namibia, 0.221-m Newtonian; 11' tail in p.a. 105 deg); 02.46, 10.9, 2.4' (A. Pearce, 0.05-m Refractor + CCD; 13.6' tail in p.a. 99 deg); 02.39, 9.9, 2' (M. Mattiazzo, Swan Hill, Victoria, Australia, 15x70 Binoculars); 02.19, 9.9, 3.2' (K. Yoshimoto, 0.431-m Newtonian + CCD; 17' tail in p.a. 100 deg); 01.92, 9.9, 1.7' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain; 0.15° tail in p.a. 100 deg); 01.91, 10.6, 3.4' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD); 01.91, 10.1, 4' (J. de Souza Aguiar, 0.27-m Newtonian); 01.91, 10.1, 2' (C. Labordena, Culla, 0.2-m Schmidt-Cassegrain; 10° tail); 01.88, 9.8, 2' (V. Gonano, Udine, Italy, 20x80 Binoculars; 0.15° tail in p.a. 100 deg); 01.74, 10.1, 1.4' (C. Harder, Capricorn, Namibia, 0.221-m Newtonian; 11' tail in p.a. 110 deg); 01.52, 9.9, 2' (J. Pile, San Rafael, Bulacan, Philippines, 0.114-m Newtonian); jun 30.85, 10.9, 1.9' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD); 30.74, 10.2, 1.2' (C. Harder, Capricorn, Namibia, 0.221-m Newtonian; 13' tail in p.a. 100 deg); 30.46, 11.1, 2.4' (A. Pearce, 0.05-m Refractor + CCD; 14.6' tail in p.a. 99 deg); 30.02, 12.9, 1.1' (G. Navas, Llano del Hato, Mérida Venezuela, 1-m Cassegrain reflector + CCD; 203.6" tail); 29.93, 9.8, 3' (P. Pérez Corujo, Vega de San Mateo Gran Canaria, 25x100 Binoculars); 29.75, 10.4, 1.3' (C. Harder, Capricorn, Namibia, 0.221-m Newtonian; 11' tail in p.a. 105 deg); 29.75, 9.9, 4.6' (T. Lehmann, Hakos (remote), 0.106-m Refractor + CCD; 0.31° tail in p.a. 100 deg); 29.51, 10.6, 1.6' (O. Miyazaki, 0.32-m Newtonian); 29.46, 10.8, 2.2' (A. Pearce, 0.05-m Refractor + CCD; 12.8' tail in p.a. 99 deg); 28.91, 10.0, 3.7' (P. Dekelver, 0.3-m Newtonian + CCD; 16' tail in p.a. 98 deg); 28.85, 10.0, 3' (V. Gonano, Udine, Italy, 20x80 Binoculars; 10' tail in p.a. 100 deg); 28.82, 10.8, 1.35' (C. Harder, Heimat, Namibia, 0.221-m Newtonian; 12° tail in p.a. 100 deg); 28.48, 11.4, 1.8' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD; 8.2' tail in p.a. 100 deg); 28.46, 10.9, 2.2' (A. Pearce, 0.05-m Refractor + CCD; 11.4' tail in p.a. 100 deg); 28.37, 9.9, 2.6' (C. Wyatt, 15x70 Binoculars; 11' tail in p.a. 99 deg);

C/2023 C2 (ATLAS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
jul 26.77, 14.0, 0.7' (A. Pearce, 0.5-m Schmidt-Cassegrain + CCD); 25.95, 13.8, 0.7' (A. Pearce, 0.5-m Schmidt-Cassegrain + CCD); 24.93, 14.0, 0.7' (A. Pearce, 0.5-m Schmidt-Cassegrain + CCD); 13.80, 14.0, 0.6' (A. Pearce, 0.5-m Schmidt-Cassegrain + CCD); 12.73, 14.0, 0.6' (A. Pearce, 0.5-m Schmidt-Cassegrain + CCD); 11.91, 13.6, 0.6' (C. Harder, Capricorn, Namibia, 0.508-m Newtonian); 10.88, 14.0, 0.6' (C. Harder, Capricorn, Namibia, 0.51-m Newtonian); 09.82, 13.9, 0.5' (C. Harder, Capricorn, Namibia, 0.508-m Newtonian); 08.79, 13.8, 0.6' (C. Harder, Capricorn, Namibia, 0.508-m Newtonian); 08.74, 13.8, 0.7' (A. Pearce, 0.5-m Schmidt-Cassegrain + CCD); 07.78, 13.8, 0.65' (C. Harder, Capricorn, Namibia, 0.508-m Newtonian); 06.87, 13.7, 0.8' (C. Harder, Capricorn, Namibia, 0.508-m Newtonian); 05.80, 13.7, 0.8' (C. Harder, Capricorn, Namibia, 0.508-m Newtonian); 04.82, 14.4, 0.5' (C. Harder, Capricorn, Namibia, 0.508-m Newtonian); 03.00, 13.8, 0.5' (C. Harder, Capricorn, Namibia, 0.508-m Newtonian); 02.79, 13.8, 0.6' (C. Harder, Capricorn, Namibia, 0.508-m Newtonian); 01.78, 13.6, 0.5' (C. Harder, Capricorn, Namibia, 0.508-m Newtonian); jun 30.87, 13.3, 2.5' (T. Lehmann, Hakos (remote), 0.106-m Refractor + CCD; 1.6' tail in p.a. 289 deg);

C/2023 Q1 (PANSTARRS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
jul 16.12, 17.5, 0.4' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD); 10.11, 17.5, 0.4' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD); 06.99, 17.0, 0.4' (P. Dekelver, 0.3-m Newtonian + CCD); jun 29.04, 17.1, 0.4' (P. Dekelver, 0.3-m Newtonian + CCD);

C/2023 V4 (Camarasa-Duszanowicz)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
jul 26.87, 15.6, -- (T. Csorgei, Blahová, 0.28-m Schmidt-Cassegrain + CCD); 25.93, 12.6, 3' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD); 24.91, 11.7, 2.2' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain); 23.92, 12.4, 3' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD); 18.91, 11.5, 4.5' (M. Paradowski, Dabrowa, Poland, 0.05-m Camera lens + CCD); 18.91, 11.3, 4.5' (M. Paradowski, Dabrowa, Poland, 0.05-m Camera lens + CCD); 18.91, 12.4, 4.5' (M. Paradowski, Dabrowa, Poland, 0.05-m Camera lens + CCD); 16.93, 11.9, 6' (S. Fritsche, Koeditz, 0.1-m Refractor + CCD; 0.08° tail in p.a. 320 deg); 09.94, 11.7, 4.8' (T. Lehmann, Weimar, 0.279-m Newtonian + CCD; 0.16° tail in p.a. 303 deg); 09.92, 11.7, 5.5' (S. Fritsche, Koeditz, 0.1-m Refractor + CCD; 0.09° tail in p.a. 311 deg); 08.92, 10.8, 4.5' (V. Gonano, Udine, Italy, 20x80 Binoculars); 08.91, 11.6, 5.2' (S. Fritsche, Koeditz, 0.1-m Refractor + CCD; 0.09° tail in p.a. 290 deg); 07.91, 11.5, 6.6' (S. Fritsche, Koeditz, 0.1-m Refractor + CCD; 0.12° tail in p.a. 293 deg); 06.98, 11.3, 4.5' (M. Paradowski, Dabrowa, Poland, 0.05-m Camera lens + CCD); 06.97, 11.1, 4.5' (M. Paradowski, Dabrowa, Poland, 0.05-m Camera lens + CCD); 06.96, 11.5, 4.5' (M. Paradowski, Dabrowa, Poland, 0.05-m Camera lens + CCD); 06.96, 11.4, 4.5' (M. Paradowski, Dabrowa, Poland, 0.05-m Camera lens + CCD); 06.95, 11.2, 4.5' (M. Paradowski, Dabrowa, Poland, 0.05-m Camera lens + CCD); 06.94, 12.1, 2.6' (P. Dekelver, 0.3-m Newtonian + CCD; 5.2' tail in p.a. 292 deg); 06.94, 11.4, 4.5' (M. Paradowski, Dabrowa, Poland, 0.05-m Camera lens + CCD); 06.89, 13.2, -- (T. Csorgei, Blahová, 0.27-m Schmidt-Cassegrain + CCD); 05.95, 10.7, 3' (V. Gonano, Udine, Italy, 20x80 Binoculars); 05.92, 11.9, 3' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD); 05.91, 11.6, 5.1' (S. Fritsche, Koeditz, 0.1-m Refractor + CCD; 0.13° tail in p.a. 278 deg); 03.93, 11.9, 2.6' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD); 03.90, 11.8, 2' (G. Pappa, Piemonte,Italy (remote control), 0.11-m Newtonian + CCD); 02.92, 11.5, 2.8' (M. Paradowski, 0.068-m Refractor + CCD); 02.91, 11.3, 2.8' (M. Paradowski, 0.068-m Refractor + CCD); 02.91, 11.4, 2.8' (M. Paradowski, 0.068-m Refractor + CCD); 01.93, 10.8, 2.5' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain); 01.92, 10.7, 3' (V. Gonano, Udine, Italy, 20x80 Binoculars); jun 30.94, 12.2, 1.5' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD); 30.84, 10.8, 2' (G. Pappa, Pedara,Sicily,Italy, 0.3-m Camera lens + CCD); 29.96, 10.6, 2.8' (M. Paradowski, 0.068-m Refractor + CCD); 29.95, 10.4, 2.8' (M. Paradowski, 0.068-m Refractor + CCD); 29.93, 10.8, 2.8' (M. Paradowski, 0.068-m Refractor + CCD); 29.91, 10.6, 2' (P. Pérez Corujo, Vega de San Mateo Gran Canaria, 25x100 Binoculars); 28.94, 11.2, 3.7' (P. Dekelver, 0.3-m Newtonian + CCD; 6.1' tail in p.a. 264 deg); 28.92, 12.1, 1.3' (M. Mašek, 0.25-m Schmidt-Cassegrain + CCD; 1.7' tail in p.a. 312 deg); 28.92, 12.0, 1.1' (M. Mašek, 0.25-m Schmidt-Cassegrain + CCD; 1.5' tail in p.a. 327 deg); 28.88, 10.9, 3' (V. Gonano, Udine, Italy, 20x80 Binoculars); 28.84, 11.0, 2' (G. Pappa, Pedara,Sicily,Italy, 0.3-m Camera lens + CCD);

C/2024 E1 (Wierzchos)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
jul 09.98, 19.7, 0.3' (T. Lehmann, Weimar, 0.279-m Newtonian + CCD);

C/2024 G3 (ATLAS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
jul 11.77, 16.5, 0.5' (G. Pappa, Namibia (remote control), 0.106-m Refractor + CCD); 07.83, 17.2, 0.5' (T. Lehmann, Hakos (remote), 0.106-m Refractor + CCD; 0.4' tail in p.a. 118 deg);

P/2012 US27 (Siding Spring)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
jul 05.38, 19.6, 0.2' (M. Mašek, 0.3-m Cassegrain reflector + CCD);