3I/ATLAS
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
sep 15.39, 14.7, 0.5' (C. Wyatt, 0.4-m Newtonian);
    13.12, 14.8, 0.4' (M. Olason, Arizona, 0.05-m Refractor + CCD);
    12.82, 14.6, 0.8' (M. Buechner, Castilléjar, Spain, 0.14-m Refractor + CCD; 2' tail);
    12.42, 14.1, 2.2' (K. Yoshimoto, 0.51-m Newtonian + CCD; 1' tail in p.a. 103 deg);
    11.61, 16.1, -- (G. Nobre, Manaus - X33, 2-m Newtonian + CCD);
    10.12, 14.7, 0.4' (M. Olason, Arizona, 0.05-m Refractor + CCD; 0.4' tail in p.a. 109 deg);
    09.15, 15.0, 0.4' (M. Olason, Arizona, 0.05-m Refractor + CCD);
    08.44, 15.0, 0.4' (M. Mattiazzo, Strathalbyn, South Australia, 0.05-m Camera lens + CCD);
    08.14, 15.2, 0.3' (M. Olason, Arizona, 0.05-m Refractor + CCD);
    06.14, 15.5, 0.3' (M. Olason, Arizona, 0.05-m Refractor + CCD);
    05.43, 15.5, 0.39' (T. Lekatsas, Heaven's Mirror Observatory, Yass (MPC Q56), 0.106-m Refractor + CCD);
    04.52, 15.3, 0.4' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD);
    03.53, 15.5, 0.3' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD);
    02.55, 15.6, 0.25' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD);
    02.37, 15.7, 0.16' (S. Badcock, Otaki, New Zealand, 0.25-m Newtonian + CCD);
    01.78, 15.7, 0.4' (T. Lehmann, Hakos (remote), 0.106-m Refractor + CCD; 0.4' tail in p.a. 115 deg);
    01.55, 15.5, 0.25' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD);
aug 30.13, 15.7, 0.3' (M. Olason, Arizona, 0.05-m Refractor + CCD);
    29.87, 15.8, 0.4' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    28.84, 15.4, 0.6' (J. Chambó Bris, Valles, Valencia, Spain, 0.2-m Newtonian + CCD);
    27.14, 16.0, 0.3' (M. Olason, Arizona, 0.05-m Refractor + CCD);
    26.81, 16.1, 0.3' (A. Tuznik, Ożarów, Polska, 0.061-m Refractor + CCD);
    26.46, 15.8, 0.38' (T. Lekatsas, iTelescope Observatory, Siding Spring (MPC Q62), 0.43-m Cassegrain reflector + CCD);
    25.83, 15.2, 0.32' (D. Heggie, ASERO, Trevinca, Spain, 0.303-m Newtonian + CCD);
    25.82, 15.2, 0.4' (E. Bryssinck, 0.4-m Newtonian + CCD);
    25.42, 15.9, 0.32' (T. Lekatsas, iTelescope Observatory, Siding Spring (MPC Q62), 0.43-m Cassegrain reflector + CCD);
    24.44, 16.0, 0.32' (T. Lekatsas, iTelescope Observatory, Siding Spring (MPC Q62), 0.43-m Cassegrain reflector + CCD);
    24.17, 16.2, 0.3' (M. Olason, Arizona, 0.05-m Refractor + CCD);
    23.85, 15.1, 0.28' (D. Heggie, ASERO, Trevinca, Spain, 0.303-m Newtonian + CCD);
    23.82, 16.1, 0.5' (T. Csorgei, 0.28-m Schmidt-Cassegrain + CCD);
    23.13, 16.0, 0.2' (M. Olason, Tucson, Arizona, 0.05-m Refractor + CCD);
    23.06, 16.1, -- (J. Maikner, Comet Hunter Observatory2, New Ringgold, 0.305-m Hyperboloid astro-camera + CCD);
    22.88, 15.6, 0.23' (D. Heggie, ASERO, Trevinca, Spain, 0.303-m Newtonian + CCD);
    22.81, 16.4, 0.4' (T. Csorgei, 0.28-m Schmidt-Cassegrain + CCD);
    22.59, 15.8, 0.35' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD);
    22.40, 16.1, 0.3' (T. Lekatsas, iTelescope Observatory, Siding Spring (MPC Q62), 0.43-m Cassegrain reflector + CCD);
    21.87, 16.0, 0.4' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    21.80, 16.0, 0.28' (S. Shurpakov, 0.41-m Newtonian + CCD);
    21.76, 16.2, 0.5' (T. Lehmann, Hakos (remote), 0.45-m Newtonian + CCD; 0.5' tail in p.a. 101 deg);
    19.89, 16.1, 0.4' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    19.82, 16.0, 0.31' (J. Zakrajšek, Crni Vrh Observatory (MPC 106), 0.6-m Prime focus of a reflector + CCD);
    18.85, 15.3, 0.5' (E. Bryssinck, 0.4-m Newtonian + CCD);
    17.40, 16.3, 0.29' (T. Lekatsas, iTelescope Observatory, Siding Spring (MPC Q62), 0.43-m Cassegrain reflector + CCD);


24P/Schaumasse
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
aug 31.34, 19.8, -- (J. Maikner, Comet Hunter Observatory2, New Ringgold, 0.305-m Hyperboloid astro-camera + CCD);


47P/Ashbrook-Jackson
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
sep 02.57, 15.6, 0.6' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD; 1' tail in p.a. 255 deg);
    01.58, 15.5, 0.6' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD; 1' tail in p.a. 261 deg);
    01.51, 15.1, 0.6' (A. Pearce, Mardella Observatory, 1-m Newtonian + CCD);
aug 31.58, 15.7, 0.6' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD);
    31.18, 16.3, -- (J. Maikner, Comet Hunter Observatory2, New Ringgold, 0.305-m Hyperboloid astro-camera + CCD);
    30.94, 15.2, -- (C. Harder, nahe Westerholz, 0.531-m Newtonian);
    30.59, 15.0, 0.7' (A. Pearce, Mardella Observatory, 1-m Newtonian + CCD; 0.6' tail in p.a. 259 deg);
    30.57, 15.2, 0.7' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD; 3.1' tail in p.a. 246 deg);
    30.22, 15.4, 0.6' (M. Olason, Arizona, 0.05-m Refractor + CCD);
    30.04, 16.0, 0.42' (R. Hill, 0.5-m Newtonian + CCD);
    29.62, 15.6, 0.6' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD; 1.4' tail in p.a. 258 deg);
    27.90, 16.3, 0.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 1.4' tail in p.a. 250 deg);
    26.89, 16.4, 0.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 3.5' tail in p.a. 248 deg);
    25.96, 15.5, 0.6' (E. Bryssinck, 0.4-m Newtonian + CCD; 1' tail in p.a. 259 deg);
    25.91, 16.7, 0.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 3.7' tail in p.a. 249 deg);
    23.39, 16.1, 0.6' (T. Lehmann, PieTown (remote), 0.3-m Newtonian + CCD; 0.08° tail in p.a. 247 deg);
    22.64, 15.8, 0.7' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD; 1.9' tail in p.a. 251 deg);
    22.02, 16.2, 0.6' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    17.98, 15.8, 1' (T. Lehmann, Hakos (remote), 0.106-m Refractor + CCD; 0.11° tail in p.a. 248 deg);


48P/Johnson
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
sep 02.79, 16.8, 0.5' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD; 0.7' tail in p.a. 248 deg);
aug 31.76, 16.2, 0.6' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD; 0.8' tail in p.a. 248 deg);
    30.76, 16.1, 0.7' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD; 2.2' tail in p.a. 250 deg);
    30.74, 15.8, 0.7' (A. Pearce, Mardella Observatory, 1-m Newtonian + CCD);
    30.43, 16.2, 0.9' (T. Lehmann, PieTown (remote), 0.3-m Newtonian + CCD; 0.08° tail in p.a. 253 deg);
    30.31, 17.4, -- (J. Maikner, Comet Hunter Observatory2, New Ringgold, 0.305-m Hyperboloid astro-camera + CCD);
    29.77, 16.0, 0.8' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD; 1' tail in p.a. 248 deg);
    26.05, 16.7, 1.2' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 1.6' tail in p.a. 254 deg);
    22.78, 15.9, 0.7' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD);
    22.14, 17.3, 0.25' (R. Hill, 0.5-m Newtonian + CCD);
    22.10, 17.2, 0.4' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    20.10, 16.0, 1.1' (T. Lehmann, Weimar, 0.279-m Newtonian + CCD; 0.09° tail in p.a. 253 deg);


65P/Gunn
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
aug 25.77, 15.7, 0.7' (T. Lehmann, Hakos (remote), 0.106-m Refractor + CCD);
    24.22, 16.5, 0.3' (M. Olason, Arizona, 0.05-m Refractor + CCD);
    21.91, 15.3, 0.4' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);


78P/Gehrels
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
sep 04.49, 16.9, 0.4' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD);
    02.53, 17.2, 0.35' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD);
    01.49, 16.9, 0.3' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD);
aug 31.54, 17.2, 0.35' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD);
    30.51, 16.7, 0.4' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD);
    29.96, 17.1, 0.4' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    29.53, 16.9, 0.4' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD);
    28.53, 17.1, 0.3' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD);
    27.88, 17.8, 0.5' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD);
    25.91, 17.0, 0.2' (E. Bryssinck, 0.4-m Newtonian + CCD);
    25.86, 18.2, 0.5' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD);
    25.83, 17.0, 0.6' (T. Lehmann, Hakos (remote), 0.106-m Refractor + CCD);
    24.97, 17.6, 0.23' (R. Hill, 0.5-m Newtonian + CCD);
    24.29, 17.2, 0.3' (M. Olason, Arizona, 0.05-m Refractor + CCD);
    22.51, 17.0, 0.5' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD);
    21.99, 17.3, 0.4' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    19.91, 17.3, 0.31' (J. Zakrajšek, Crni Vrh Observatory (MPC 106), 0.6-m Prime focus of a reflector + CCD);
    17.83, 17.2, 0.5' (T. Lehmann, Hakos (remote), 0.106-m Refractor + CCD);


93P/Lovas
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
aug 22.08, 19.5, 0.25' (R. Hill, 0.5-m Newtonian + CCD);


95P/Chiron
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
aug 25.89, 18.9, 0.3' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD);


105P/Singer Brewster
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
aug 25.96, 19.3, 0.3' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD);


123P/West-Hartley
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
aug 23.34, 20.1, -- (J. Maikner, Comet Hunter Observatory2, New Ringgold, 0.305-m Hyperboloid astro-camera + CCD);


145P/Shoemaker-Levy
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
aug 30.00, 17.8, 0.31' (R. Hill, 0.5-m Newtonian + CCD);


164P/Christensen
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
sep 05.14, 17.9, 0.2' (J. Zakrajšek, Crni Vrh Observatory (MPC 106), 0.6-m Prime focus of a reflector + CCD);


188P/LINEAR-Mueller
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
aug 29.96, 19.1, 0.31' (R. Hill, 0.5-m Newtonian + CCD);
    22.03, 19.3, 0.25' (R. Hill, 0.5-m Newtonian + CCD);


210P/Christensen
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
sep 02.66, 18.6, 0.25' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD);
    01.53, 18.5, 0.25' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD);
aug 30.56, 18.8, 0.25' (A. Pearce, Mardella Observatory, 1-m Newtonian + CCD);
    30.55, 18.9, 0.25' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD);
    28.57, 18.9, 0.3' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD);
    22.54, 18.9, 0.3' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD);
    20.02, 19.3, 0.17' (R. Hill, 0.5-m Newtonian + CCD);


217P/LINEAR
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
sep 09.48, 15.3, 0.6' (M. Olason, Arizona, 0.05-m Refractor + CCD);
    01.16, 15.0, 0.7' (A. Pearce, Skygems Namibia Remote Observatory, 0.45-m Schmidt-Cassegrain + CCD; 1' tail in p.a. 266 deg);
aug 31.16, 14.8, 0.7' (A. Pearce, Skygems Namibia Remote Observatory, 0.45-m Schmidt-Cassegrain + CCD);
    30.16, 14.9, 0.7' (A. Pearce, Skygems Namibia Remote Observatory, 0.45-m Schmidt-Cassegrain + CCD; 9' tail in p.a. 264 deg);
    26.10, 15.2, 1' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 2.4' tail in p.a. 266 deg);
    24.18, 14.9, 0.7' (A. Pearce, Skygems Namibia Remote Observatory, 0.45-m Schmidt-Cassegrain + CCD; 0.8' tail in p.a. 268 deg);
    20.17, 14.5, 0.7' (A. Pearce, Skygems Namibia Remote Observatory, 0.45-m Schmidt-Cassegrain + CCD; 3.1' tail in p.a. 265 deg);
    19.17, 14.6, 0.6' (A. Pearce, Skygems Namibia Remote Observatory, 0.45-m Schmidt-Cassegrain + CCD);
    18.17, 14.5, 0.7' (A. Pearce, Skygems Namibia Remote Observatory, 0.45-m Schmidt-Cassegrain + CCD; 0.7' tail in p.a. 273 deg);
    17.18, 14.7, 0.7' (A. Pearce, Skygems Namibia Remote Observatory, 0.45-m Schmidt-Cassegrain + CCD; 0.4' tail in p.a. 264 deg);


240P/NEAT
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
sep 08.47, 14.3, 0.7' (M. Olason, Arizona, 0.05-m Refractor + CCD; 5' tail in p.a. 259 deg);
    08.11, 14.5, 1.8' (U. Pilz, Leipzig, 0.035-m Refractor + CCD);
    04.13, 14.5, 1' (J. Zakrajšek, Crni Vrh Observatory (MPC 106), 0.6-m Prime focus of a reflector + CCD; 11.9' tail in p.a. 251 deg);
    03.51, 14.4, 0.7' (M. Olason, Arizona, 0.05-m Refractor + CCD; 5' tail in p.a. 251 deg);
    02.73, 14.7, 0.7' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD; 3.7' tail in p.a. 247 deg);
    01.77, 13.7, 1' (O. Miyazaki, 0.32-m Newtonian);
    01.74, 14.4, 0.8' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD; 4.8' tail in p.a. 246 deg);
    01.12, 12.8, 1.5' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain);
aug 31.73, 14.3, 0.9' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD; 8' tail in p.a. 248 deg);
    31.71, 14.0, 0.9' (K. Harikae, 0.15-m Newtonian + CCD);
    31.32, 13.2, 1' (J. de Souza Aguiar, 0.3-m Newtonian);
    30.74, 14.6, 0.7' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD; 9.2' tail in p.a. 247 deg);
    30.73, 14.5, 0.7' (A. Pearce, Mardella Observatory, 1-m Newtonian + CCD; 3.5' tail in p.a. 255 deg);
    30.33, 13.2, 1' (J. de Souza Aguiar, 0.3-m Newtonian);
    30.33, 15.7, -- (J. Maikner, Comet Hunter Observatory2, New Ringgold, 0.305-m Hyperboloid astro-camera + CCD);
    30.14, 14.9, 0.9' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    29.84, 14.6, 0.8' (A. Pearce, Nedlands, Perth, 0.05-m Refractor + CCD; 1.2' tail in p.a. 243 deg);
    29.79, 14.0, 0.7' (K. Yoshimoto, 0.3-m Newtonian + CCD; 10' tail in p.a. 250 deg);
    29.74, 14.2, 0.9' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD; 10' tail in p.a. 247 deg);
    29.46, 14.2, 1.5' (T. Lehmann, PieTown (remote), 0.3-m Newtonian + CCD; 0.15° tail in p.a. 251 deg);
    28.84, 14.6, 0.9' (A. Pearce, Nedlands, Perth, 0.05-m Refractor + CCD; 3' tail in p.a. 244 deg);
    28.33, 13.4, 1' (J. de Souza Aguiar, 0.3-m Newtonian);
    27.75, 13.2, 1.1' (O. Miyazaki, 0.32-m Newtonian);
    26.71, 14.5, 1.1' (K. Harikae, 0.15-m Newtonian + CCD);
    26.04, 15.4, 0.8' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 7' tail in p.a. 250 deg);
    23.42, 14.6, 0.7' (M. Olason, Arizona, 0.05-m Refractor + CCD; 2' tail in p.a. 249 deg);
    22.84, 14.8, 0.8' (A. Pearce, Nedlands, Perth, 0.05-m Refractor + CCD; 2.4' tail in p.a. 248 deg);
    22.75, 14.6, 0.7' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD; 5.2' tail in p.a. 248 deg);
    22.15, 15.3, 0.37' (R. Hill, 0.5-m Newtonian + CCD);
    22.14, 14.2, 1.3' (T. Lehmann, Hakos (remote), 0.106-m Refractor + CCD; 0.15° tail in p.a. 249 deg);
    22.12, 15.1, 0.6' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    20.76, 13.7, 0.9' (O. Miyazaki, 0.32-m Newtonian);


248P/Gibbs
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
aug 31.30, 19.3, -- (J. Maikner, Comet Hunter Observatory2, New Ringgold, 0.305-m Hyperboloid astro-camera + CCD);


261P/Larson
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
aug 25.03, 18.4, 0.23' (R. Hill, 0.5-m Newtonian + CCD);


302P/Lemmon-PANSTARRS
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
sep 02.62, 16.6, 0.4' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD; 0.4' tail in p.a. 252 deg);
    01.66, 16.5, 0.5' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD; 0.9' tail in p.a. 254 deg);
aug 29.37, 16.6, 0.7' (T. Lehmann, PieTown (remote), 0.3-m Newtonian + CCD; 2.3' tail in p.a. 257 deg);
    25.93, 17.3, 0.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 1.4' tail in p.a. 254 deg);
    20.07, 16.6, 0.7' (T. Lehmann, Weimar, 0.279-m Newtonian + CCD; 1.9' tail in p.a. 254 deg);


303P/NEAT
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
aug 23.10, 18.9, -- (J. Maikner, Comet Hunter Observatory2, New Ringgold, 0.305-m Hyperboloid astro-camera + CCD);


331P/Gibbs
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
aug 27.24, 19.7, -- (J. Maikner, Comet Hunter Observatory2, New Ringgold, 0.305-m Hyperboloid astro-camera + CCD);


351P/Wiegert-PANSTARRS
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
sep 01.48, 17.6, 0.4' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD);
aug 31.52, 16.9, 0.3' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD);
    30.49, 17.6, 0.3' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD);
    29.52, 17.5, 0.3' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD);
    28.51, 17.3, 0.3' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD);


362P/Spacewatch
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
aug 25.88, 19.1, 0.3' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD);


414P/STEREO
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
sep 06.51, 15.9, 0.3' (M. Olason, Arizona, 0.05-m Refractor + CCD);
    05.13, 16.1, 0.47' (J. Zakrajšek, Crni Vrh Observatory (MPC 106), 0.6-m Prime focus of a reflector + CCD);
    03.80, 15.1, 1' (K. Yoshimoto, 0.3-m Newtonian + CCD);
aug 31.38, 18.5, -- (J. Maikner, Comet Hunter Observatory2, New Ringgold, 0.305-m Hyperboloid astro-camera + CCD);
    30.80, 17.7, 0.2' (K. Yoshimoto, 0.3-m Newtonian + CCD);


486P/Leonard
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
sep 03.22, 18.2, 0.2' (R. Hill, 0.5-m Newtonian + CCD);
    02.62, 17.7, 0.3' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD);
    01.65, 17.4, 0.3' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD);
aug 31.65, 17.4, 0.4' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD; 0.3' tail in p.a. 250 deg);
    25.95, 18.0, 0.5' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD);
    20.18, 18.1, 0.23' (R. Hill, 0.5-m Newtonian + CCD);


502P/NEAT
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
aug 25.87, 19.3, 0.3' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD);
    24.96, 19.4, 0.23' (R. Hill, 0.5-m Newtonian + CCD);


C/2014 UN271 (Bernardinelli-Bernstein)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
sep 02.71, 15.3, 0.6' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD);
    01.72, 15.5, 0.5' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD);
aug 31.72, 15.3, 0.6' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD);
    30.71, 15.0, 0.6' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD);
    29.70, 15.3, 0.6' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD);
    23.08, 14.2, 1.7' (T. Lehmann, Hakos (remote), 0.106-m Refractor + CCD);
    22.72, 15.2, 0.7' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD);


C/2017 K2 (PANSTARRS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
aug 26.05, 18.2, 0.6' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD);
    22.14, 17.8, 0.4' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);


C/2019 T4 (ATLAS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
aug 25.96, 19.6, 0.3' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD);


C/2019 U5 (PANSTARRS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
sep 02.83, 17.3, 0.5' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD);
aug 31.78, 17.2, 0.6' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD);
    30.78, 17.5, 0.5' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD);
    29.78, 17.6, 0.5' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD);


C/2020 V2 (ZTF)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
sep 02.59, 16.4, 0.6' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD);
    01.56, 16.7, 0.6' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD);
aug 31.60, 16.6, 0.6' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD);
    30.59, 16.6, 0.6' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD);
    30.58, 16.5, 0.5' (A. Pearce, Mardella Observatory, 1-m Newtonian + CCD);
    29.58, 16.6, 0.6' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD);
    28.64, 16.6, 0.6' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD);
    22.62, 16.2, 0.7' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD);


C/2021 G2 (Atlas)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
sep 11.77, 15.3, 1.2' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD);
    10.15, 14.3, 0.8' (M. Olason, Arizona, 0.05-m Refractor + CCD);
    04.78, 15.0, 1.2' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD);
    03.78, 15.2, 1' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD);
    02.48, 14.6, 0.8' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD);
    01.78, 15.1, 1.2' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD);
aug 31.75, 14.6, 1.2' (T. Lehmann, Hakos (remote), 0.106-m Refractor + CCD; 2.2' tail in p.a. 222 deg);
    31.51, 14.7, 0.8' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD);
    30.15, 14.4, 0.8' (M. Olason, Arizona, 0.05-m Refractor + CCD);
    26.81, 14.5, 1.2' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 4.6' tail in p.a. 233 deg);
    26.81, 15.5, 0.8' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 1.7' tail in p.a. 232 deg);
    26.80, 15.3, 1.2' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 5.6' tail in p.a. 231 deg);
    26.43, 14.4, 0.5' (C. Wyatt, 0.4-m Newtonian);
    25.84, 14.1, 1.2' (E. Bryssinck, 0.4-m Newtonian + CCD);
    25.80, 15.2, 1.3' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 5.3' tail in p.a. 234 deg);
    24.80, 15.0, 1.3' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 5.9' tail in p.a. 228 deg);
    23.85, 14.9, 1' (T. Csorgei, 0.28-m Schmidt-Cassegrain + CCD);
    23.76, 14.5, 1.3' (T. Lehmann, Hakos (remote), 0.106-m Refractor + CCD; 0.14° tail in p.a. 232 deg);
    23.54, 14.9, 0.7' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD);
    20.87, 14.7, 0.8' (R. Hill, 0.5-m Newtonian + CCD);
    19.87, 14.8, 0.8' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    17.75, 14.5, 1.2' (T. Lehmann, Hakos (remote), 0.106-m Refractor + CCD; 0.15° tail in p.a. 230 deg);


C/2021 S3 (PANSTARRS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
aug 30.11, 18.6, 0.2' (R. Hill, 0.5-m Newtonian + CCD);
    25.90, 18.9, 0.4' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD);
    20.91, 18.6, 0.26' (R. Hill, 0.5-m Newtonian + CCD);


C/2022 E2 (ATLAS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
sep 11.79, 15.7, 1' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD);
    06.84, 16.5, 0.3' (T. Csorgei, 0.28-m Schmidt-Cassegrain + CCD);
    05.90, 14.3, 1.1' (E. Bryssinck, 0.4-m Newtonian + CCD);
    04.80, 15.6, 0.8' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD);
    03.83, 15.8, 0.8' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD);
    01.82, 15.7, 0.8' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD);
    01.57, 15.2, 0.46' (Y. Yamaguchi, 0.13-m Hyperboloid astro-camera + CCD);
aug 31.08, 14.8, 1.1' (T. Lehmann, Weimar, 0.279-m Newtonian + CCD; 0.15° tail in p.a. 57 deg);
    30.96, 15.8, 0.34' (S. Shurpakov, 0.41-m Newtonian + CCD);
    30.90, 15.7, 0.3' (C. Harder, nahe Westerholz, 0.531-m Newtonian);
    30.18, 15.1, 0.8' (M. Olason, Arizona, 0.05-m Refractor + CCD);
    30.02, 14.7, 0.9' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    28.45, 14.8, 1.1' (T. Lehmann, PieTown (remote), 0.3-m Newtonian + CCD; 0.11° tail in p.a. 57 deg);
    27.86, 15.7, 1.2' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD);
    26.88, 15.5, 1.2' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD);
    25.85, 16.0, 0.8' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD);
    24.85, 15.6, 1' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 0.2' tail in p.a. 47 deg);
    22.06, 15.3, 0.6' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    22.00, 15.3, 0.39' (S. Shurpakov, 0.41-m Newtonian + CCD);
    19.56, 14.7, 0.46' (Y. Yamaguchi, 0.13-m Hyperboloid astro-camera + CCD);
    19.10, 14.7, 1.1' (T. Lehmann, Weimar, 0.279-m Newtonian + CCD; 0.16° tail in p.a. 60 deg);
    19.00, 14.8, 1.1' (M. Lošťák, 0.2-m Newtonian + CCD);
    19.00, 15.7, 1.3' (M. Lošťák, 0.2-m Newtonian + CCD);
    18.90, 15.3, 0.25' (C. Harder, nahe Westerholz, 0.531-m Newtonian);
    17.06, 15.3, 1' (U. Pilz, Leipzig, 0.035-m Refractor + CCD);
    17.00, 15.5, -- (C. Harder, nahe Westerholz, 0.531-m Newtonian);
    16.96, 15.7, 0.8' (R. Arnold, Skye, Scotland, 0.2-m Schmidt-Cassegrain);


C/2022 N2 (PANSTARRS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
sep 05.74, 14.6, 0.9' (K. Harikae, 0.15-m Newtonian + CCD);
    05.09, 14.6, 1' (J. Zakrajšek, Crni Vrh Observatory (MPC 106), 0.6-m Prime focus of a reflector + CCD; 10.1' tail in p.a. 257 deg);
    02.80, 14.7, 0.7' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD);
    01.76, 13.5, 1' (O. Miyazaki, 0.32-m Newtonian);
aug 31.80, 14.7, 0.7' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD; 0.5' tail in p.a. 247 deg);
    31.70, 14.2, 1.2' (K. Harikae, 0.15-m Newtonian + CCD);
    31.05, 14.9, 0.25' (C. Harder, nahe Westerholz, 0.531-m Newtonian);
    30.98, 15.3, 1.5' (M. Lošťák, 0.2-m Newtonian + CCD);
    30.98, 14.1, 1.3' (M. Lošťák, 0.2-m Newtonian + CCD);
    30.80, 14.6, 0.8' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD; 0.4' tail in p.a. 246 deg);
    30.14, 14.5, 1.2' (T. Lehmann, Hakos (remote), 0.106-m Refractor + CCD; 0.11° tail in p.a. 256 deg);
    30.12, 14.6, 0.8' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    29.81, 14.7, 0.7' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD; 1.4' tail in p.a. 244 deg);
    27.74, 14.0, 0.8' (O. Miyazaki, 0.32-m Newtonian);
    26.70, 14.7, 1.3' (K. Harikae, 0.15-m Newtonian + CCD);
    25.94, 15.1, 1.2' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 8' tail in p.a. 256 deg);
    25.13, 13.2, 0.3' (W. Hasubick, 0.44-m Newtonian);
    23.71, 14.6, 1.2' (K. Harikae, 0.15-m Newtonian + CCD);
    22.82, 14.6, 0.7' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD);
    22.11, 14.9, 0.6' (R. Hill, 0.5-m Newtonian + CCD);
    22.08, 14.7, 0.8' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    21.08, 14.8, 1.4' (U. Pilz, Leipzig, 0.035-m Refractor + CCD);
    20.74, 14.1, 0.7' (O. Miyazaki, 0.32-m Newtonian);
    20.03, 14.6, 1.1' (T. Lehmann, Weimar, 0.279-m Newtonian + CCD; 0.09° tail in p.a. 256 deg);


C/2023 A3 (Tsuchinshan-ATLAS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
sep 11.80, 16.6, 0.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD);
    06.81, 17.5, 0.5' (T. Csorgei, 0.28-m Schmidt-Cassegrain + CCD);
    05.84, 16.7, 0.6' (E. Bryssinck, 0.4-m Newtonian + CCD; 0.5' tail in p.a. 61 deg);
    03.81, 17.4, 0.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD);
aug 30.91, 16.4, 1.2' (T. Lehmann, Weimar, 0.279-m Newtonian + CCD; 0.13° tail in p.a. 90 deg);
    27.85, 17.7, 0.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD);
    26.84, 17.2, 0.47' (J. Zakrajšek, Crni Vrh Observatory (MPC 106), 0.6-m Prime focus of a reflector + CCD; 0.4' tail in p.a. 97 deg);
    26.83, 18.0, 0.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD);
    25.82, 17.6, 0.5' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD);
    24.85, 17.5, 0.8' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD);
    21.97, 17.7, 0.4' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    21.97, 16.8, 0.34' (S. Shurpakov, 0.41-m Newtonian + CCD);
    21.88, 18.0, 0.17' (R. Hill, 0.5-m Newtonian + CCD);
    19.96, 17.6, 0.4' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    19.94, 17.1, 0.6' (J. Zakrajšek, Crni Vrh Observatory (MPC 106), 0.6-m Prime focus of a reflector + CCD; 0.5' tail in p.a. 97 deg);
    18.90, 15.8, 1.8' (T. Lehmann, Weimar, 0.279-m Newtonian + CCD; 0.17° tail in p.a. 89 deg);
    16.97, 17.9, 0.9' (R. Arnold, Skye, Scotland, 0.2-m Schmidt-Cassegrain);


C/2023 C2 (ATLAS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
sep 11.79, 15.8, 0.5' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD);
    06.85, 16.3, 0.6' (T. Csorgei, 0.28-m Schmidt-Cassegrain + CCD);
    05.88, 15.3, 0.5' (E. Bryssinck, 0.4-m Newtonian + CCD);
    04.81, 16.4, 0.5' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD);
    03.83, 15.9, 0.5' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD);
    03.23, 16.1, 0.28' (R. Hill, 0.5-m Newtonian + CCD);
    01.82, 16.2, 0.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD);
    01.53, 15.5, 0.39' (Y. Yamaguchi, 0.13-m Hyperboloid astro-camera + CCD);
    01.03, 15.8, 0.43' (J. Zakrajšek, Crni Vrh Observatory (MPC 106), 0.6-m Prime focus of a reflector + CCD);
aug 31.05, 15.3, 1.2' (T. Lehmann, Weimar, 0.279-m Newtonian + CCD; 0.05° tail in p.a. 215 deg);
    30.17, 15.5, 0.5' (M. Olason, Arizona, 0.05-m Refractor + CCD);
    27.94, 15.1, 0.53' (M. Paradowski, Dabrowa, Poland, 0.254-m Schmidt-Newtonian + CCD);
    27.94, 15.5, 0.53' (M. Paradowski, Dabrowa, Poland, 0.254-m Schmidt-Newtonian + CCD);
    27.87, 15.9, 0.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD);
    27.45, 15.7, 0.8' (T. Lehmann, PieTown (remote), 0.3-m Newtonian + CCD; 1.4' tail in p.a. 201 deg);
    26.88, 16.5, 0.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 0.2' tail in p.a. 192 deg);
    25.96, 15.3, 0.6' (E. Bryssinck, 0.4-m Newtonian + CCD; 0.2' tail in p.a. 178 deg);
    25.85, 16.3, 0.5' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD);
    24.85, 16.8, 0.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD);
    22.04, 16.0, 0.4' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    20.14, 16.0, 0.31' (R. Hill, 0.5-m Newtonian + CCD);
    19.53, 16.0, 0.3' (Y. Yamaguchi, 0.13-m Hyperboloid astro-camera + CCD);
    19.04, 15.3, 1.1' (T. Lehmann, Weimar, 0.279-m Newtonian + CCD; 1.9' tail in p.a. 223 deg);
    18.96, 16.7, 0.6' (M. Lošťák, 0.2-m Newtonian + CCD);
    18.96, 15.6, 0.6' (M. Lošťák, 0.2-m Newtonian + CCD);


C/2023 H5 (Lemmon)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
sep 11.80, 17.5, 0.5' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 1.3' tail in p.a. 212 deg);
    01.83, 17.1, 0.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 1.7' tail in p.a. 210 deg);
aug 30.85, 16.5, 0.6' (T. Lehmann, Weimar, 0.279-m Newtonian + CCD; 0.04° tail in p.a. 208 deg);
    26.89, 17.2, 0.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 0.5' tail in p.a. 200 deg);
    25.83, 17.2, 0.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 2' tail in p.a. 205 deg);
    21.89, 17.0, 0.4' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    19.87, 16.6, 0.6' (T. Lehmann, Weimar, 0.279-m Newtonian + CCD; 0.06° tail in p.a. 202 deg);
    17.90, 16.8, 0.31' (M. Paradowski, Dabrowa, Poland, 0.254-m Schmidt-Newtonian + CCD);
    17.90, 16.6, 0.31' (M. Paradowski, Dabrowa, Poland, 0.254-m Schmidt-Newtonian + CCD);


C/2023 R1 (PANSTARRS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
sep 11.78, 16.7, 0.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD);
    05.86, 15.5, 0.6' (E. Bryssinck, 0.4-m Newtonian + CCD);
    04.81, 16.4, 0.6' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD);
    03.82, 16.3, 0.5' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD);
    03.52, 15.6, 0.6' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD);
    02.52, 15.5, 0.5' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD);
    01.81, 15.7, 0.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD);
    01.53, 15.3, 0.6' (A. Pearce, Mardella Observatory, 1-m Newtonian + CCD);
    01.51, 15.7, 0.6' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD);
aug 31.87, 15.8, 0.47' (J. Zakrajšek, Crni Vrh Observatory (MPC 106), 0.6-m Prime focus of a reflector + CCD);
    30.95, 15.5, 0.8' (T. Lehmann, Weimar, 0.279-m Newtonian + CCD; 1.5' tail in p.a. 79 deg);
    30.88, 15.6, 0.4' (M. Lošťák, 0.2-m Newtonian + CCD);
    30.83, 15.9, 0.28' (S. Shurpakov, 0.41-m Newtonian + CCD);
    30.54, 15.3, 0.6' (A. Pearce, Mardella Observatory, 1-m Newtonian + CCD);
    30.53, 15.5, 0.6' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD);
    30.19, 15.8, 0.5' (M. Olason, Arizona, 0.05-m Refractor + CCD);
    29.98, 16.1, 0.4' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    29.83, 15.5, 0.39' (S. Shurpakov, 0.41-m Newtonian + CCD);
    29.55, 15.8, 0.6' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD);
    28.55, 15.7, 0.5' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD);
    28.52, 15.2, 0.4' (K. Yoshimoto, 0.3-m Newtonian + CCD; 0.5' tail in p.a. 80 deg);
    27.88, 15.9, 0.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD);
    26.90, 15.5, 0.6' (J. Zakrajšek, Crni Vrh Observatory (MPC 106), 0.6-m Prime focus of a reflector + CCD);
    26.87, 15.4, 0.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD);
    25.93, 15.6, 0.6' (T. Lehmann, Hakos (remote), 0.106-m Refractor + CCD; 0.6' tail in p.a. 99 deg);
    25.93, 15.0, 0.7' (E. Bryssinck, 0.4-m Newtonian + CCD);
    25.84, 16.0, 0.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD);
    24.83, 15.7, 0.8' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD);
    22.52, 15.5, 0.6' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD);
    21.98, 15.9, 0.34' (S. Shurpakov, 0.41-m Newtonian + CCD);
    19.98, 16.1, 0.4' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    18.96, 14.4, 1.4' (U. Pilz, Leipzig, 0.035-m Refractor + CCD);
    18.95, 15.3, 0.9' (T. Lehmann, Weimar, 0.279-m Newtonian + CCD; 1.7' tail in p.a. 80 deg);
    18.93, 15.3, 2.2' (M. Lošťák, 0.2-m Newtonian + CCD);
    18.93, 13.9, 2.4' (M. Lošťák, 0.2-m Newtonian + CCD);
    18.91, 14.8, 1' (E. Bryssinck, 0.4-m Newtonian + CCD);
    16.95, 15.6, 0.7' (R. Arnold, Skye, Scotland, 0.2-m Schmidt-Cassegrain);


C/2023 RS61
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
aug 30.05, 17.8, 0.4' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);


C/2023 T3 (Fuls)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
sep 02.50, 16.6, 0.5' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD);
aug 31.48, 16.5, 0.4' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD);


C/2023 X1 (Leonard)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
aug 30.08, 18.3, 0.4' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);


C/2023 X2 (Lemmon)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
aug 25.88, 18.4, 0.4' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD);
    22.20, 18.5, 0.17' (R. Hill, 0.5-m Newtonian + CCD);


C/2024 A1 (ATLAS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
sep 05.11, 16.9, 0.47' (J. Zakrajšek, Crni Vrh Observatory (MPC 106), 0.6-m Prime focus of a reflector + CCD);


C/2024 B1 (Lemmon)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
aug 19.93, 19.0, 0.2' (R. Hill, 0.5-m Newtonian + CCD);


C/2024 E1 (Wierzchos)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
sep 14.86, 13.5, 1.2' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain);
    14.82, 14.2, 2.2' (U. Pilz, Leipzig, 0.035-m Refractor + CCD);
    11.78, 14.9, 1.2' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 1.5' tail in p.a. 42 deg);
    10.88, 14.6, 0.7' (D. Heggie, ASERO, Trevinca, Spain, 0.303-m Newtonian + CCD; 1.3' tail in p.a. 35 deg);
    10.16, 13.9, 0.7' (M. Mattiazzo, 0.5-m Newtonian + CCD; 0.9' tail in p.a. 42 deg);
    08.84, 14.6, 0.5' (D. Heggie, ASERO, Trevinca, Spain, 0.303-m Newtonian + CCD; 0.8' tail in p.a. 45 deg);
    06.82, 15.0, 1.1' (T. Csorgei, 0.28-m Schmidt-Cassegrain + CCD; 1' tail in p.a. 43 deg);
    05.84, 14.3, 0.4' (D. Heggie, ASERO, Trevinca, Spain, 0.303-m Newtonian + CCD; 0.8' tail in p.a. 39 deg);
    05.81, 14.5, 0.8' (E. Bryssinck, 0.4-m Newtonian + CCD; 1.3' tail in p.a. 55 deg);
    04.83, 14.8, 0.8' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 0.8' tail in p.a. 43 deg);
    04.83, 14.3, 1' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 0.8' tail in p.a. 42 deg);
    04.82, 15.1, 0.8' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 0.7' tail in p.a. 49 deg);
    04.82, 15.0, 1' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 0.7' tail in p.a. 49 deg);
    03.89, 14.7, 0.7' (R. Hill, 0.5-m Newtonian + CCD);
    03.82, 14.2, 1.2' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 1.1' tail in p.a. 37 deg);
    03.81, 14.9, 1' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 0.7' tail in p.a. 47 deg);
    03.81, 14.7, 1.3' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 1.4' tail in p.a. 39 deg);
    02.87, 14.7, 0.63' (D. Heggie, ASERO, Trevinca, Spain, 0.303-m Newtonian + CCD; 1.2' tail in p.a. 42 deg);
    01.89, 13.9, 0.55' (D. Heggie, ASERO, Trevinca, Spain, 0.303-m Newtonian + CCD; 72" tail in p.a. 45 deg);
    01.81, 14.2, 1.2' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 1.4' tail in p.a. 49 deg);
    01.80, 15.0, 1.2' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 1.6' tail in p.a. 42 deg);
    01.80, 14.8, 1' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 1.4' tail in p.a. 44 deg);
aug 31.86, 14.7, 0.9' (J. Zakrajšek, Crni Vrh Observatory (MPC 106), 0.6-m Prime focus of a reflector + CCD; 1.5' tail in p.a. 39 deg);
    30.88, 13.8, 4.4' (T. Lehmann, Weimar, 0.279-m Newtonian + CCD; 1.9' tail in p.a. 53 deg);
    30.86, 15.1, 0.4' (C. Harder, nahe Westerholz, 0.531-m Newtonian);
    30.84, 13.9, 1.8' (M. Lošťák, 0.2-m Newtonian + CCD);
    30.84, 14.9, 1.8' (M. Lošťák, 0.2-m Newtonian + CCD);
    29.93, 14.8, 0.8' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    29.89, 14.9, 0.6' (R. Hill, 0.5-m Newtonian + CCD);
    29.86, 15.2, 0.39' (S. Shurpakov, 0.41-m Newtonian + CCD; 0.4' tail in p.a. 50 deg);
    27.88, 14.1, 1.1' (M. Paradowski, Dabrowa, Poland, 0.254-m Schmidt-Newtonian + CCD; 1.8' tail in p.a. 42 deg);
    27.88, 14.3, 1.1' (M. Paradowski, Dabrowa, Poland, 0.254-m Schmidt-Newtonian + CCD; 2.2' tail in p.a. 47 deg);
    27.84, 13.9, 1' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 1.3' tail in p.a. 44 deg);
    27.84, 14.8, 1' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 1' tail in p.a. 60 deg);
    27.83, 15.1, 1.2' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 1.4' tail in p.a. 48 deg);
    26.85, 14.6, 1' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 0.8' tail in p.a. 52 deg);
    26.84, 15.5, 1' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 1.1' tail in p.a. 56 deg);
    26.84, 15.3, 0.8' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 0.7' tail in p.a. 60 deg);
    25.89, 14.2, 1' (E. Bryssinck, 0.4-m Newtonian + CCD; 0.9' tail in p.a. 54 deg);
    25.83, 15.2, 1' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 1' tail in p.a. 58 deg);
    24.83, 15.0, 1.2' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 0.8' tail in p.a. 66 deg);
    23.89, 15.1, 0.5' (C. Harder, nahe Westerholz, 0.531-m Newtonian);
    21.95, 15.3, 0.34' (S. Shurpakov, 0.41-m Newtonian + CCD);
    20.88, 15.1, 0.6' (C. Harder, nahe Westerholz, 0.531-m Newtonian);
    19.98, 15.4, 0.31' (R. Hill, 0.5-m Newtonian + CCD);
    19.93, 14.6, 0.9' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    18.89, 14.8, 0.6' (C. Harder, nahe Westerholz, 0.531-m Newtonian);
    18.89, 14.5, 1' (E. Bryssinck, 0.4-m Newtonian + CCD; 1' tail in p.a. 45 deg);
    18.89, 14.9, 2.8' (M. Lošťák, 0.2-m Newtonian + CCD);
    18.89, 13.7, 2.4' (M. Lošťák, 0.2-m Newtonian + CCD);
    18.87, 14.4, 2.1' (U. Pilz, Leipzig, 0.035-m Refractor + CCD);
    18.86, 14.5, 2' (T. Lehmann, Weimar, 0.279-m Newtonian + CCD; 1.3' tail in p.a. 58 deg);
    17.90, 15.2, 0.2' (C. Harder, nahe Westerholz, 0.531-m Newtonian);
    16.94, 15.2, 1' (R. Arnold, Skye, Scotland, 0.2-m Schmidt-Cassegrain);


C/2024 G6 (ATLAS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
aug 22.56, 18.1, 0.5' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD);


C/2024 J2 (Wierzchos)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
aug 22.18, 18.2, 0.17' (R. Hill, 0.5-m Newtonian + CCD);
    22.16, 15.6, 1.9' (T. Lehmann, Hakos (remote), 0.106-m Refractor + CCD);


C/2024 J3 (ATLAS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
sep 11.77, 15.9, 0.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD);
    10.15, 15.4, 0.3' (M. Olason, Arizona, 0.05-m Refractor + CCD);
    05.83, 15.9, 0.3' (E. Bryssinck, 0.4-m Newtonian + CCD);
aug 30.55, 15.5, 0.4' (A. Pearce, Mardella Observatory, 1-m Newtonian + CCD);
    29.91, 15.4, 0.4' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    29.49, 15.7, 0.5' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD);
    28.48, 15.4, 0.5' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD);
    27.86, 16.0, 0.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD);
    26.83, 16.3, 0.5' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD);
    24.84, 16.0, 0.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD);
    23.96, 15.4, 0.7' (T. Lehmann, Hakos (remote), 0.106-m Refractor + CCD; 0.5' tail in p.a. 161 deg);
    22.48, 15.5, 0.5' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD);
    21.95, 15.6, 0.4' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    19.96, 16.1, 0.31' (R. Hill, 0.5-m Newtonian + CCD);
    16.92, 15.6, 0.38' (N. Quinn, 0.28-m Schmidt-Cassegrain + CCD);


C/2024 N3 (Sarneczky)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
aug 25.91, 18.0, 0.5' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD);
    25.88, 17.4, 0.4' (E. Bryssinck, 0.4-m Newtonian + CCD);


C/2024 R4 (PANSTARRS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
aug 30.99, 17.2, 0.5' (T. Lehmann, Weimar, 0.279-m Newtonian + CCD; 0.1' tail in p.a. 154 deg);
    28.43, 17.3, 0.4' (T. Lehmann, PieTown (remote), 0.3-m Newtonian + CCD);
    25.93, 18.1, 0.3' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD);
    18.99, 17.4, 0.4' (T. Lehmann, Weimar, 0.279-m Newtonian + CCD);


C/2024 T5 (ATLAS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
sep 02.68, 16.0, 0.4' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD; 0.4' tail in p.a. 245 deg);
    01.69, 15.9, 0.45' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD; 0.4' tail in p.a. 249 deg);
aug 31.70, 16.0, 0.4' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD; 0.2' tail in p.a. 260 deg);
    30.68, 16.1, 0.4' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD; 0.4' tail in p.a. 248 deg);
    30.68, 16.0, 0.4' (A. Pearce, Mardella Observatory, 1-m Newtonian + CCD; 0.5' tail in p.a. 250 deg);
    30.09, 16.1, 0.6' (T. Lehmann, Hakos (remote), 0.106-m Refractor + CCD; 1.2' tail in p.a. 252 deg);
    29.67, 16.1, 0.45' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD; 0.5' tail in p.a. 243 deg);
    18.04, 16.2, 0.5' (T. Lehmann, Hakos (remote), 0.106-m Refractor + CCD; 0.4' tail in p.a. 245 deg);


C/2025 A6 (Lemmon)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
sep 15.07, 9.1, 3.4' (A. Novichonok, Simeiz Observatory, 0.15-m Newtonian);
    14.15, 9.2, 4' (V. Gonano, Udine, Italy, 20x80 Binoculars);
    14.14, 9.1, 6.39' (N. James, 0.072-m Refractor + CCD);
    14.12, 8.5, 3.8' (M. Collins, Everton, 0.254-m Schmidt-Cassegrain; 3.7' tail in p.a. 273 deg);
    14.07, 9.3, 3' (A. Novichonok, Simeiz Observatory, 0.15-m Newtonian);
    13.14, 9.2, 4.5' (V. Gonano, Udine, Italy, 20x80 Binoculars);
    12.41, 9.5, 4.5' (M. Olason, Arizona, 0.05-m Refractor + CCD; 10' tail in p.a. 295 deg);
    12.13, 8.2, 4.4' (M. Collins, Everton, 0.254-m Schmidt-Cassegrain; 4' tail in p.a. 279 deg);
    12.11, 9.4, 4.4' (V. Gonano, Udine, Italy, 20x80 Binoculars);
    12.11, 9.3, 6.2' (N. James, 0.072-m Refractor + CCD);
    11.49, 9.6, 2.7' (M. Mattiazzo, 0.5-m Newtonian + CCD);
    11.16, 9.2, 4.4' (D. Heggie, ASERO, Trevinca, Spain, 0.303-m Newtonian + CCD; 4' tail in p.a. 293 deg);
    11.12, 9.4, 3.7' (M. Collins, Everton, 0.254-m Schmidt-Cassegrain);
    11.10, 9.5, 4.32' (N. James, 0.072-m Refractor + CCD);
    09.50, 9.8, 4' (M. Olason, Arizona, 0.05-m Refractor + CCD; 15' tail in p.a. 291 deg);
    09.13, 10.1, 2.7' (M. Collins, Everton, 0.254-m Schmidt-Cassegrain);
    09.11, 10.1, 3' (V. Gonano, Udine, Italy, 20x80 Binoculars);
    08.50, 9.9, 4' (M. Olason, Arizona, 0.05-m Refractor + CCD; 15' tail in p.a. 291 deg);
    08.07, 9.8, 5.6' (M. Šrejber, Hvezdarna a planetarium Hradec Kralove (MPC 048), 0.25-m Newtonian + CCD; 27.2' tail in p.a. 292 deg);
    07.78, 10.2, 2.6' (O. Miyazaki, 0.32-m Newtonian);
    07.13, 10.3, 5' (U. Pilz, Leipzig, 0.035-m Refractor + CCD; 0.07° tail in p.a. 303 deg);
    07.11, 10.0, 4' (V. Gonano, Udine, Italy, 20x80 Binoculars);
    06.49, 10.1, 4' (M. Olason, Arizona, 0.05-m Refractor + CCD; 15' tail in p.a. 290 deg);
    06.20, 9.8, 4' (D. Heggie, ASERO, Trevinca, Spain, 0.303-m Newtonian + CCD; 2.3' tail in p.a. 293 deg);
    06.11, 9.4, 5.5' (C. Harder, Jeersdorf h, 0.252-m Newtonian);
    06.11, 9.9, 4' (V. Gonano, Udine, Italy, 20x80 Binoculars);
    05.79, 9.8, 4' (K. Yoshimoto, 20x100 Binoculars);
    05.78, 10.0, 2' (R. Aikawa, 0.203-m Schmidt-Cassegrain);
    05.78, 10.1, 2.8' (O. Miyazaki, 0.32-m Newtonian);
    05.74, 10.3, 3.2' (K. Harikae, 0.15-m Newtonian + CCD);
    05.20, 10.1, 2.2' (D. Heggie, ASERO, Trevinca, Spain, 0.303-m Newtonian + CCD);
    05.11, 9.9, 3.5' (V. Gonano, Udine, Italy, 20x80 Binoculars);
    05.10, 9.9, 9.6' (J. Zakrajšek, Crni Vrh Observatory (MPC 106), 0.6-m Prime focus of a reflector + CCD; 26.8' tail in p.a. 290 deg);
    04.11, 10.1, 7.3' (J. Zakrajšek, Crni Vrh Observatory (MPC 106), 0.6-m Prime focus of a reflector + CCD; 20.7' tail in p.a. 288 deg);
    04.10, 9.8, 3.5' (M. Meyer, 0.152-m Refractor);
    04.09, 10.0, 3' (V. Gonano, Udine, Italy, 20x80 Binoculars);
    04.06, 10.2, 3' (E. Banach, 0.25-m Newtonian);
    03.81, 10.2, 3.1' (K. Yoshimoto, 0.3-m Newtonian + CCD; 30' tail in p.a. 290 deg);
    03.81, 9.9, 5.8' (K. Yoshimoto, 0.3-m Newtonian + CCD; 30' tail in p.a. 290 deg);
    03.81, 10.6, 5.8' (K. Yoshimoto, 0.3-m Newtonian + CCD; 20' tail in p.a. 290 deg);
    03.50, 10.3, 4' (M. Olason, Arizona, 0.05-m Refractor + CCD);
    03.17, 10.2, 6' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    03.11, 10.0, 3' (V. Gonano, Udine, Italy, 20x80 Binoculars);
    03.08, 11.4, 1.4' (M. Uhlar, 0.3-m Newtonian + CCD);
    03.07, 10.2, 3' (M. Uhlar, 0.3-m Newtonian + CCD);
    02.50, 10.4, 4' (M. Olason, Arizona, 0.05-m Refractor + CCD);
    02.11, 10.5, 3.38' (N. James, 0.072-m Refractor + CCD);
    02.10, 10.0, 4' (V. Gonano, Udine, Italy, 20x80 Binoculars);
    02.08, 9.9, 4' (P. Guzik, 25x100 Binoculars);
    01.82, 10.0, 5.3' (K. Yoshimoto, 0.3-m Newtonian + CCD; 10' tail in p.a. 290 deg);
    01.79, 10.6, 3' (Y. Nagai, 0.044-m Camera lens + CCD);
    01.78, 10.9, 2.7' (O. Miyazaki, 0.32-m Newtonian);
    01.17, 10.1, 5' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain);
    01.11, 10.6, 3.38' (N. James, 0.072-m Refractor + CCD);
    01.11, 10.9, 3' (V. Gonano, Udine, Italy, 20x80 Binoculars);
aug 31.79, 10.8, 2.6' (K. Harikae, 0.15-m Newtonian + CCD);
    31.15, 11.1, 2' (C. Labordena, La Serratella, 0.2-m Schmidt-Cassegrain);
    31.14, 10.5, 1' (W. Hasubick, 0.44-m Newtonian);
    31.11, 10.3, 8.2' (T. Lehmann, Weimar, 0.279-m Newtonian + CCD; 0.17° tail in p.a. 288 deg);
    31.11, 10.5, 3' (V. Gonano, Udine, Italy, 20x80 Binoculars);
    31.10, 10.0, 4' (M. Meyer, 0.254-m Newtonian);
    31.09, 10.8, 6.6' (U. Pilz, Leipzig, 0.035-m Refractor + CCD);
    31.09, 11.3, 2.3' (U. Pilz, 0.32-m Newtonian);
    31.09, 10.9, 6.4' (M. Lošťák, 0.2-m Newtonian + CCD);
    31.09, 11.0, 6.4' (M. Lošťák, 0.2-m Newtonian + CCD);
    31.07, 10.8, 2.5' (C. Harder, nahe Westerholz, 0.531-m Newtonian);
    30.49, 10.8, 3.5' (M. Olason, Arizona, 0.05-m Refractor + CCD);
    30.47, 10.1, 9.9' (T. Lehmann, PieTown (remote), 0.3-m Newtonian + CCD; 0.06° tail in p.a. 287 deg);
    30.17, 11.0, 5' (J. Chambó Bris, Valles, Valencia, Spain, 0.2-m Newtonian + CCD);
    30.17, 10.8, 4.3' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    30.12, 11.0, 2.82' (N. James, 0.072-m Refractor + CCD);
    30.11, 10.8, 2.5' (V. Gonano, Udine, Italy, 20x80 Binoculars);
    29.95, 10.8, 2.4' (A. Novichonok, Padozero logging, 0.2-m Newtonian);
    29.82, 10.2, 3.6' (K. Yoshimoto, 0.3-m Newtonian + CCD; 5' tail in p.a. 290 deg);
    29.78, 10.5, 1.8' (O. Miyazaki, 0.32-m Newtonian);
    28.82, 10.1, 3.3' (K. Yoshimoto, 0.3-m Newtonian + CCD; 2' tail in p.a. 285 deg);
    28.47, 10.1, 9.6' (T. Lehmann, PieTown (remote), 0.3-m Newtonian + CCD; 0.13° tail in p.a. 287 deg);
    28.12, 10.4, 7.3' (D. Buczynski, Tarbatness MPC Code I81, 0.35-m Schmidt-Cassegrain + CCD);
    28.09, 10.5, 3.1' (V. Gonano, Udine, Italy, 20x80 Binoculars);
    28.07, 11.2, 3.5' (M. Paradowski, Dabrowa, Poland, 0.254-m Schmidt-Newtonian + CCD);
    28.07, 10.5, 3.5' (M. Paradowski, Dabrowa, Poland, 0.254-m Schmidt-Newtonian + CCD);
    27.78, 11.3, 1.6' (O. Miyazaki, 0.32-m Newtonian);
    27.48, 10.8, 3.5' (M. Olason, Arizona, 0.05-m Refractor + CCD);
    27.09, 10.9, 3.1' (V. Gonano, Udine, Italy, 20x80 Binoculars);
    26.79, 11.3, 2.2' (K. Harikae, 0.15-m Newtonian + CCD);
    26.11, 10.8, 5.8' (J. Zakrajšek, Crni Vrh Observatory (MPC 106), 0.6-m Prime focus of a reflector + CCD);
    26.09, 10.8, 3' (M. Meyer, 0.254-m Newtonian);
    26.08, 12.6, 2.3' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 0.9' tail in p.a. 284 deg);
    26.08, 11.2, 2.8' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 1.2' tail in p.a. 284 deg);
    26.07, 11.9, 3' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 1.4' tail in p.a. 284 deg);
    25.13, 11.3, 0.8' (W. Hasubick, 0.44-m Newtonian);
    25.12, 10.9, 4' (D. Buczynski, Tarbatness MPC Code I81, 0.35-m Schmidt-Cassegrain + CCD);
    25.09, 10.9, 2.5' (M. Meyer, 0.254-m Newtonian);
    25.09, 10.9, 2' (V. Gonano, Udine, Italy, 20x80 Binoculars);
    24.10, 10.9, 2.5' (M. Meyer, 0.254-m Newtonian);
    23.78, 11.8, 2.1' (K. Harikae, 0.15-m Newtonian + CCD);
    23.77, 11.3, 1.5' (O. Miyazaki, 0.32-m Newtonian);
    23.47, 10.6, 9.1' (T. Lehmann, PieTown (remote), 0.3-m Newtonian + CCD);
    23.45, 11.3, 2' (M. Olason, Arizona, 0.05-m Refractor + CCD);
    23.10, 11.0, 2' (V. Gonano, Udine, Italy, 20x80 Binoculars);
    22.16, 11.3, 4.5' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    22.08, 11.7, 5.5' (M. Lošťák, 0.2-m Newtonian + CCD);
    22.08, 11.2, 5.5' (M. Lošťák, 0.2-m Newtonian + CCD);
    21.81, 11.2, 2.2' (K. Yoshimoto, 0.3-m Newtonian + CCD);
    21.80, 11.2, 3.9' (K. Yoshimoto, 0.3-m Newtonian + CCD; 0.4' tail in p.a. 295 deg);
    21.80, 11.8, 2' (K. Yoshimoto, 0.3-m Newtonian + CCD);
    21.16, 10.6, 5' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain);


C/2025 J1 (Borisov)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
aug 25.92, 19.1, 0.3' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD);


C/2025 K1 (ATLAS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
sep 10.12, 11.5, 1.4' (M. Olason, Arizona, 0.05-m Refractor + CCD; 2.5' tail in p.a. 103 deg);
    09.15, 11.5, 1.4' (M. Olason, Arizona, 0.05-m Refractor + CCD; 5' tail in p.a. 102 deg);
    08.78, 11.5, 2' (V. Gonano, Udine, Italy, 20x80 Binoculars);
    08.42, 11.9, 1.5' (M. Mattiazzo, Strathalbyn, South Australia, 0.05-m Camera lens + CCD; 4' tail in p.a. 101 deg);
    06.78, 11.4, 2' (V. Gonano, Udine, Italy, 20x80 Binoculars);
    05.77, 11.5, 2' (V. Gonano, Udine, Italy, 20x80 Binoculars);
    04.77, 11.5, 2' (V. Gonano, Udine, Italy, 20x80 Binoculars);
    03.81, 11.5, 4' (U. Pilz, 0.035-m Refractor + CCD);
    03.48, 12.1, 1.4' (A. Pearce, Nedlands, Perth, 0.05-m Refractor + CCD; 2' tail in p.a. 102 deg);
    02.75, 11.5, 3.9' (T. Lehmann, Hakos (remote), 0.106-m Refractor + CCD; 0.09° tail in p.a. 98 deg);
    02.47, 12.5, 1.3' (A. Pearce, Nedlands, Perth, 0.05-m Refractor + CCD; 2.5' tail in p.a. 102 deg);
    02.47, 12.3, 1.5' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD; 3.1' tail in p.a. 96 deg);
    01.78, 12.7, 1.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 10.1' tail in p.a. 99 deg);
    01.47, 12.3, 1.4' (A. Pearce, Nedlands, Perth, 0.05-m Refractor + CCD; 2.6' tail in p.a. 93 deg);
aug 31.50, 12.4, 1.5' (A. Pearce, Perth Observatory, Bickley, 0.35-m Schmidt-Cassegrain + CCD; 4.4' tail in p.a. 94 deg);
    31.48, 12.5, 1.3' (A. Pearce, Nedlands, Perth, 0.05-m Refractor + CCD; 3.8' tail in p.a. 97 deg);
    30.83, 11.6, 2' (C. Harder, nahe Westerholz, 0.531-m Newtonian);
    30.82, 11.7, 3.9' (T. Lehmann, Weimar, 0.279-m Newtonian + CCD; 0.19° tail in p.a. 96 deg);
    30.49, 12.6, 1.2' (A. Pearce, Nedlands, Perth, 0.05-m Refractor + CCD; 2' tail in p.a. 98 deg);
    30.15, 12.1, 1.4' (M. Olason, Arizona, 0.05-m Refractor + CCD; 2' tail in p.a. 95 deg);
    29.89, 12.2, 2' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    29.48, 12.6, 1.2' (A. Pearce, Nedlands, Perth, 0.05-m Refractor + CCD; 1.6' tail in p.a. 104 deg);
    28.48, 12.4, 1.5' (A. Pearce, Nedlands, Perth, 0.05-m Refractor + CCD; 7.4' tail in p.a. 97 deg);
    27.95, 11.8, 1.5' (J. de Souza Aguiar, 0.3-m Newtonian);
    27.82, 11.4, 0.53' (M. Paradowski, Dabrowa, Poland, 0.254-m Schmidt-Newtonian + CCD; 2' tail in p.a. 100 deg);
    27.82, 11.8, 0.53' (M. Paradowski, Dabrowa, Poland, 0.254-m Schmidt-Newtonian + CCD; 3.3' tail in p.a. 100 deg);
    27.82, 12.5, 1' (J. Powichrowski, Knyszyn, 0.35-m Newtonian);
    27.20, 12.3, 1.4' (M. Olason, Arizona, 0.05-m Refractor + CCD; 2' tail in p.a. 91 deg);
    26.82, 13.0, 2' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 16' tail in p.a. 96 deg);
    26.82, 12.8, 2.2' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 15.2' tail in p.a. 95 deg);
    26.82, 11.5, 1.1' (V. Gonano, Udine, Italy, 20x80 Binoculars);
    26.81, 13.2, 2.3' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 18' tail in p.a. 97 deg);
    26.44, 11.5, 1' (C. Wyatt, 0.4-m Newtonian; 5.5' tail in p.a. 87 deg);
    25.95, 11.9, 1.5' (J. de Souza Aguiar, 0.3-m Newtonian);
    25.86, 11.8, 2.4' (E. Bryssinck, 0.4-m Newtonian + CCD; 3.6' tail in p.a. 98 deg);
    25.82, 12.1, 2' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 27.2' tail in p.a. 96 deg);
    25.81, 12.9, 2.2' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 24.4' tail in p.a. 98 deg);
    25.81, 12.7, 2' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 24.1' tail in p.a. 95 deg);
    24.91, 13.0, 1' (R. Hill, 0.5-m Newtonian + CCD);
    24.86, 11.8, 1.4' (C. Harder, nahe Westerholz, 0.252-m Newtonian);
    24.85, 12.0, 1.5' (M. Meyer, 0.254-m Newtonian);
    24.84, 12.2, 1.3' (A. Kammerer, Les Bruyeres (Vercors, 1000m altitude), France, 0.397-m Newtonian);
    24.82, 12.8, 1.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 26.4' tail in p.a. 94 deg);
    24.82, 12.2, 2.3' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 24.2' tail in p.a. 98 deg);
    24.82, 13.0, 2.3' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 22.1' tail in p.a. 97 deg);
    24.81, 13.1, 2' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 22.6' tail in p.a. 98 deg);
    23.88, 13.0, 0.6' (M. Phillips, ASERO Trevinca Skies, Spain, 0.3-m Newtonian + CCD; 5' tail in p.a. 95 deg);
    23.88, 11.9, 1.2' (C. Harder, nahe Westerholz, 0.531-m Newtonian);
    23.85, 12.4, 1' (A. Kammerer, Les Bruyeres (Vercors, 1000m altitude), France, 0.397-m Newtonian);
    23.84, 13.2, 1.4' (T. Csorgei, 0.28-m Schmidt-Cassegrain + CCD; 5.1' tail in p.a. 93 deg);
    23.81, 11.5, 5.4' (T. Lehmann, Hakos (remote), 0.106-m Refractor + CCD; 0.22° tail in p.a. 96 deg);
    23.48, 11.7, 0.8' (O. Miyazaki, 0.32-m Newtonian);
    23.45, 12.6, 1.6' (T. Lekatsas, Heaven's Mirror Observatory, Yass (MPC Q56), 0.106-m Refractor + CCD);
    23.15, 12.5, 1.4' (M. Olason, Arizona, 0.05-m Refractor + CCD; 2' tail in p.a. 96 deg);
    22.90, 13.5, 0.56' (D. Heggie, ASERO, Trevinca, Spain, 0.303-m Newtonian + CCD; 146" tail in p.a. 98 deg);
    22.86, 11.7, 1.5' (C. Labordena, Culla, 0.2-m Schmidt-Cassegrain);
    22.83, 13.6, 1.2' (T. Csorgei, 0.28-m Schmidt-Cassegrain + CCD; 6.9' tail in p.a. 96 deg);
    22.52, 12.5, 1.5' (A. Pearce, Nedlands, Perth, 0.05-m Refractor + CCD; 5.2' tail in p.a. 97 deg);
    21.96, 12.0, 2' (J. de Souza Aguiar, 0.3-m Newtonian);
    21.93, 12.5, 12.1' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    21.85, 12.2, 2.5' (U. Pilz, Leipzig, 0.035-m Refractor + CCD);
    21.76, 12.5, 2.1' (J. Chambó Bris, Hakos, Namibia, 0.106-m Refractor + CCD; 19.5' tail in p.a. 98 deg);
    21.46, 12.5, 0.4' (K. Yoshimoto, 0.3-m Newtonian + CCD; 1' tail in p.a. 97 deg);
    21.46, 11.1, 1.3' (K. Yoshimoto, 0.3-m Newtonian + CCD; 12' tail in p.a. 97 deg);
    21.46, 11.8, 1.3' (K. Yoshimoto, 0.3-m Newtonian + CCD; 12' tail in p.a. 97 deg);
    20.95, 12.0, 2' (J. de Souza Aguiar, 0.3-m Newtonian);
    20.90, 11.4, 2.5' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain);
    20.55, 11.9, 1' (O. Miyazaki, 0.32-m Newtonian);
    20.00, 12.8, 0.9' (C. Harder, nahe Westerholz, 0.531-m Newtonian; 1.6' tail);
    19.95, 12.9, 1.1' (R. Hill, 0.5-m Newtonian + CCD);
    19.94, 11.9, 1.2' (W. Kutschera, 0.25-m Newtonian);
    19.91, 12.3, 2.8' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    19.87, 11.9, 1.2' (C. Harder, nahe Westerholz, 0.531-m Newtonian; 2.3' tail in p.a. 85 deg);
    19.87, 12.6, 0.8' (T. Karhula, Virsbo, Sweden, 0.305-m Newtonian);
    19.85, 11.8, 4' (U. Pilz, Leipzig, 0.035-m Refractor + CCD; 0.18° tail in p.a. 99 deg);
    19.84, 11.7, 5.2' (T. Lehmann, Weimar, 0.279-m Newtonian + CCD; 0.25° tail in p.a. 98 deg);
    19.83, 11.7, 1.8' (M. Meyer, 0.254-m Newtonian);
    18.97, 12.1, 2' (J. de Souza Aguiar, 0.3-m Newtonian);
    18.91, &11.7, 3' (M. Deconinck, Journal Belgium, 62x120 Binoculars);
    18.89, 11.9, 1.3' (C. Harder, nahe Westerholz, 0.531-m Newtonian; 2.3' tail in p.a. 90 deg);
    18.87, 12.5, 1.5' (E. Bryssinck, 0.4-m Newtonian + CCD; 4.2' tail in p.a. 100 deg);
    18.84, 11.8, 4.3' (T. Lehmann, Weimar, 0.279-m Newtonian + CCD; 0.31° tail in p.a. 98 deg);
    18.84, 12.5, 6.4' (M. Lošťák, 0.2-m Newtonian + CCD);
    18.84, 11.8, 6.4' (M. Lošťák, 0.2-m Newtonian + CCD);
    18.83, 11.8, 1.4' (M. Meyer, 0.254-m Newtonian);
    18.52, 11.4, 1.1' (K. Yoshimoto, 0.3-m Newtonian + CCD; 8' tail in p.a. 100 deg);
    18.52, 12.0, 1.1' (K. Yoshimoto, 0.3-m Newtonian + CCD; 8' tail in p.a. 100 deg);
    17.97, 12.1, 1.5' (J. de Souza Aguiar, 0.3-m Newtonian);
    17.89, 12.0, 1.2' (C. Harder, nahe Westerholz, 0.531-m Newtonian; 2.5' tail in p.a. 100 deg);
    17.86, 12.0, 0.9' (M. Kwinta, 0.3-m Newtonian);
    17.83, 11.8, 1.3' (M. Paradowski, Dabrowa, Poland, 0.254-m Schmidt-Newtonian + CCD; 4' tail in p.a. 100 deg);
    17.83, 12.0, 1.3' (M. Paradowski, Dabrowa, Poland, 0.254-m Schmidt-Newtonian + CCD; 5' tail in p.a. 100 deg);
    17.80, 11.7, 4.7' (T. Lehmann, Hakos (remote), 0.106-m Refractor + CCD; 0.28° tail in p.a. 100 deg);
    16.96, 12.1, 1' (J. de Souza Aguiar, 0.3-m Newtonian);
    16.94, 13.3, 1.5' (R. Arnold, Skye, Scotland, 0.2-m Schmidt-Cassegrain);
    16.87, 12.2, 1.88' (N. Quinn, 0.28-m Schmidt-Cassegrain + CCD);
    16.87, 11.9, 1.2' (C. Harder, Jeersdorf f, 0.252-m Newtonian);


A/2025 P1
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
aug 23.13, 21.0, -- (J. Maikner, Comet Hunter Observatory2, New Ringgold, 0.305-m Hyperboloid astro-camera + CCD);


P/2005 J1 (McNaught)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
aug 23.04, 19.5, -- (J. Maikner, Comet Hunter Observatory2, New Ringgold, 0.305-m Hyperboloid astro-camera + CCD);


P/2012 T2 (PANSTARRS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
aug 22.25, 19.9, -- (J. Maikner, Comet Hunter Observatory2, New Ringgold, 0.305-m Hyperboloid astro-camera + CCD);


P/2016 P5 (COIAS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
aug 27.14, 19.8, 8' (J. Maikner, Comet Hunter Observatory2, New Ringgold, 0.305-m Hyperboloid astro-camera + CCD);
    26.05, 19.7, -- (J. Maikner, Comet Hunter Observatory2, New Ringgold, 0.305-m Hyperboloid astro-camera + CCD);


P/2025 Q2 (PANSTARRS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
aug 30.25, 20.8, -- (J. Maikner, Comet Hunter Observatory2, New Ringgold, 0.305-m Hyperboloid astro-camera + CCD);