12P/Pons-Brooks
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
aug 30.73, 10.7, 7.5' (A. Pearce, 0.106-m Refractor + CCD; 10.9' tail in p.a. 246 deg);


13P/Olbers
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
sep 05.88, 8.3, 5' (V. Gonano, Udine, Italy, 20x80 Binoculars; 0.18° tail in p.a. 65 deg);
    05.82, 8.7, 4' (C. Harder, Jeersdorf f, 0.531-m Newtonian; 11' tail in p.a. 30 deg);
    05.80, 8.7, 3.5' (E. Banach, 0.25-m Newtonian);
    05.79, 8.2, 5.3' (M. Paradowski, Dabrowa, Poland, 0.034-m Camera lens + CCD; 0.18° tail in p.a. 63 deg);
    04.84, 8.1, 7' (D. Heggie, ASERO, Trevinca, Spain, 0.094-m Refractor + CCD; 0.4° tail in p.a. 55 deg);
    04.80, 8.5, 4' (J. Powichrowski, Knyszyn, 0.35-m Newtonian);
    04.78, 8.3, 5.3' (M. Paradowski, Dabrowa, Poland, 0.034-m Camera lens + CCD; 0.13° tail in p.a. 61 deg);
    04.43, 8.7, 3.5' (O. Miyazaki, 20x80 Binoculars; 11' tail in p.a. 75 deg);
    03.80, 8.5, 9.6' (J. Zakrajšek, Crni Vrh Observatory (MPC 106), 0.6-m Prime focus of a reflector + CCD; 0.6° tail in p.a. 76 deg);
    03.79, 8.8, 1.44' (S. Shurpakov, 0.41-m Newtonian + CCD);
    03.78, 8.1, 5.3' (M. Paradowski, Dabrowa, Poland, 0.034-m Camera lens + CCD; 0.29° tail in p.a. 66 deg);
    03.78, [7.2, 6' (M. Biely, Czech Republic, Brno, 20x80 Binoculars);
    02.86, 8.1, 5' (V. Gonano, Udine, Italy, 20x80 Binoculars; 18' tail in p.a. 56 deg);
    02.79, 8.1, 5.3' (M. Paradowski, Dabrowa, Poland, 0.034-m Camera lens + CCD; 0.31° tail in p.a. 58 deg);
    02.78, 8.1, 5.3' (M. Paradowski, Dabrowa, Poland, 0.034-m Camera lens + CCD; 0.31° tail in p.a. 58 deg);
    01.86, 8.1, 9.4' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    01.85, 8.0, 7' (D. Heggie, ASERO, Trevinca, Spain, 0.094-m Refractor + CCD; 29' tail in p.a. 46 deg);
    01.83, 8.5, 4' (C. Harder, Jeersdorf f, 0.252-m Newtonian; 10' tail in p.a. 45 deg);
    01.80, 7.9, 8.8' (J. Powichrowski, Knyszyn, 0.35-m Newtonian);
aug 31.93, 8.1, 4' (M. Goiato, 20x100 Binoculars);
    31.84, 8.1, 3.5' (T. Karhula, Virsbo, Sweden, 10x50 Binoculars);
    31.83, 8.4, 4' (C. Harder, nahe Wangersen, 0.531-m Newtonian; 15' tail in p.a. 50 deg);
    31.82, 7.7, 11' (T. Lehmann, Weimar, 0.279-m Newtonian + CCD; 0.63° tail in p.a. 26 deg);
    31.81, 8.0, 1' (M. Deconinck, Sisteron France, 0.1-m Refractor; 3' tail);
    30.87, 8.1, 5' (V. Gonano, Udine, Italy, 20x80 Binoculars; 36' tail in p.a. 70 deg);
    30.81, 7.8, 7.9' (M. Paradowski, Dabrowa, Poland, 0.034-m Camera lens + CCD; 0.3° tail in p.a. 66 deg);
    30.80, 7.8, 7.9' (M. Paradowski, Dabrowa, Poland, 0.034-m Camera lens + CCD; 0.6° tail in p.a. 59 deg);
    30.77, 8.7, 1.44' (S. Shurpakov, 0.41-m Newtonian + CCD);


37P/Forbes
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
aug 31.46, 13.8, 1' (C. Wyatt, 0.4-m Newtonian);
    30.75, 14.6, 0.8' (A. Pearce, 0.5-m Schmidt-Cassegrain + CCD; 0.4' tail in p.a. 124 deg);


43P/Wolf-Harrington
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
sep 03.97, 17.7, 0.24' (S. Shurpakov, 0.41-m Newtonian + CCD);


54P/de Vico-Swift-NEAT
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
aug 31.10, 18.5, 0.5' (J. Zakrajšek, Crni Vrh Observatory (MPC 106), 0.6-m Prime focus of a reflector + CCD; 0.8' tail in p.a. 244 deg);


89P/Russell
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
sep 04.01, 16.1, 0.34' (S. Shurpakov, 0.41-m Newtonian + CCD);
aug 30.80, 15.6, 0.8' (A. Pearce, 0.5-m Schmidt-Cassegrain + CCD; 0.3' tail in p.a. 344 deg);


130P/McNaught-Hughes
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
sep 04.05, 15.1, 1.5' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    03.99, 16.1, 0.29' (S. Shurpakov, 0.41-m Newtonian + CCD; 3' tail in p.a. 250 deg);
    02.05, 15.9, 0.6' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    01.03, 14.3, 2.3' (T. Lehmann, Weimar, 0.279-m Newtonian + CCD; 0.17° tail in p.a. 251 deg);


146P/Shoemaker-LINEAR
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
sep 04.09, 15.3, 0.8' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    04.07, 15.2, 0.34' (S. Shurpakov, 0.41-m Newtonian + CCD);
aug 31.03, 16.0, 0.34' (S. Shurpakov, 0.41-m Newtonian + CCD);


154P/Brewington
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
sep 04.15, 15.4, 1.1' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    01.07, 14.2, 2.8' (T. Lehmann, Weimar, 0.279-m Newtonian + CCD; 0.04° tail in p.a. 288 deg);


360P/WISE
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
sep 05.25, 19.7, -- (J. Maikner, Comet Hunter Observatory2, New Ringgold, 0.305-m Hyperboloid astro-camera + CCD);


C/2014 UN271 (Bernardinelli-Bernstein)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
aug 31.17, 18.0, 0.3' (N. Tirawat, Deep Sky Chile at Rio Hurtado Valley, Chile - MPC X07, 0.36-m Schmidt reflector + CCD; 57" tail in p.a. 227 deg);


C/2017 K2 (PANSTARRS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
sep 04.13, 15.2, 0.8' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    02.10, 15.1, 1.1' (J. Zakrajšek, Crni Vrh Observatory (MPC 106), 0.6-m Prime focus of a reflector + CCD);


C/2019 T4 (ATLAS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
sep 03.83, 16.0, 1' (J. Zakrajšek, Crni Vrh Observatory (MPC 106), 0.6-m Prime focus of a reflector + CCD; 4' tail in p.a. 243 deg);
    01.90, 17.1, 0.6' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
aug 30.89, 17.6, 0.29' (S. Shurpakov, 0.41-m Newtonian + CCD);


C/2020 V2 (ZTF)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
aug 31.47, 14.0, 0.7' (C. Wyatt, 0.4-m Newtonian);
    30.76, 14.2, 0.9' (A. Pearce, 0.5-m Schmidt-Cassegrain + CCD);


C/2021 S3 (PANSTARRS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
sep 05.86, 13.9, 0.8' (C. Harder, Jeersdorf f, 0.531-m Newtonian);
    05.57, 13.3, 0.8' (O. Miyazaki, 0.32-m Newtonian);
    04.46, 13.3, 0.9' (O. Miyazaki, 0.32-m Newtonian);
    04.05, 14.3, -- (R. Ang, 0.114-m Newtonian + CCD);
    04.01, 14.0, 1.3' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    03.87, 14.9, 0.34' (S. Shurpakov, 0.41-m Newtonian + CCD);
    02.00, 13.9, 1.7' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
aug 31.90, 14.2, 0.8' (C. Harder, nahe Wangersen, 0.531-m Newtonian);
    31.86, 13.5, -- (M. Deconinck, Sisteron France, 0.1-m Refractor);
    30.91, 14.6, 0.58' (S. Shurpakov, 0.41-m Newtonian + CCD);
    30.86, 13.8, 1.9' (J. Zakrajšek, Crni Vrh Observatory (MPC 106), 0.6-m Prime focus of a reflector + CCD);


C/2022 E2 (ATLAS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
sep 04.76, 13.6, 0.8' (O. Miyazaki, 0.32-m Newtonian);
    04.11, 13.5, 0.9' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);


C/2022 N2 (PANSTARRS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
sep 04.03, 14.8, 0.8' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    03.92, 15.2, 0.38' (S. Shurpakov, 0.41-m Newtonian + CCD; 2' tail in p.a. 240 deg);
    02.04, 15.0, 0.6' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
aug 31.48, 14.1, 0.6' (C. Wyatt, 0.4-m Newtonian);
    30.99, 15.3, 0.34' (S. Shurpakov, 0.41-m Newtonian + CCD; 1.3' tail in p.a. 243 deg);
    30.78, 15.0, 0.8' (A. Pearce, 0.5-m Schmidt-Cassegrain + CCD; 0.7' tail in p.a. 249 deg);


C/2022 QE78 (ATLAS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
sep 04.18, 16.2, 0.4' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    02.12, 16.0, 0.6' (J. Zakrajšek, Crni Vrh Observatory (MPC 106), 0.6-m Prime focus of a reflector + CCD; 1' tail in p.a. 248 deg);


C/2022 U1 (Leonard)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
sep 03.91, 17.1, 0.19' (S. Shurpakov, 0.41-m Newtonian + CCD);
aug 30.94, 17.4, 0.19' (S. Shurpakov, 0.41-m Newtonian + CCD);


C/2023 A3 (Tsuchinshan-ATLAS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
aug 11.90, 8.9, 1' (A. Amorim, 0.09-m Refractor);
    10.90, 9.0, -- (A. Amorim, 0.09-m Refractor);


C/2023 C2 (ATLAS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
aug 31.47, 13.9, 0.3' (C. Wyatt, 0.4-m Newtonian);
    30.75, 13.8, 0.7' (A. Pearce, 0.5-m Schmidt-Cassegrain + CCD);


C/2023 Q1 (PANSTARRS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
sep 04.08, 17.5, 0.4' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    04.06, 17.4, 0.6' (J. Zakrajšek, Crni Vrh Observatory (MPC 106), 0.6-m Prime focus of a reflector + CCD);


C/2023 R1 (PANSTARRS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
sep 03.95, 17.7, 0.19' (S. Shurpakov, 0.41-m Newtonian + CCD);
    03.09, 17.5, 1' (J. Maikner, Comet Hunter Observatory2, New Ringgold, 0.305-m Hyperboloid astro-camera + CCD);
    01.95, 17.3, 0.4' (P. Dekelver, 0.3-m Newtonian + CCD);
aug 31.98, 17.6, 0.5' (T. Lehmann, Weimar, 0.279-m Newtonian + CCD);


C/2023 V4 (Camarasa-Duszanowicz)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
sep 03.82, 15.8, 0.34' (S. Shurpakov, 0.41-m Newtonian + CCD);
    01.88, 15.6, 0.6' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    01.85, 14.6, 0.7' (P. Dekelver, 0.3-m Newtonian + CCD);
aug 31.85, 14.2, 2' (T. Lehmann, Weimar, 0.279-m Newtonian + CCD; 0.1° tail in p.a. 355 deg);
    30.79, 15.8, 0.29' (S. Shurpakov, 0.41-m Newtonian + CCD; 1' tail in p.a. 2 deg);


C/2024 A2 (ATLAS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
sep 02.13, 18.7, 0.3' (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):
2024
sep 04.14, 14.8, 1.2' (J. Zakrajšek, Crni Vrh Observatory (MPC 106), 0.6-m Prime focus of a reflector + CCD);


C/2024 E1 (Wierzchos)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
aug 31.91, 19.3, 0.4' (T. Lehmann, Weimar, 0.279-m Newtonian + CCD);


P/2005 SB216 (LONEOS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
sep 03.21, 19.6, -- (J. Maikner, Comet Hunter Observatory2, New Ringgold, 0.305-m Hyperboloid astro-camera + CCD);


P/2010 WK (LINEAR)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
sep 03.37, 18.6, -- (J. Maikner, Comet Hunter Observatory2, New Ringgold, 0.305-m Hyperboloid astro-camera + CCD);


P/2012 US27 (Siding Spring)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
sep 04.11, 17.3, 0.4' (J. Zakrajšek, Crni Vrh Observatory (MPC 106), 0.6-m Prime focus of a reflector + CCD; 0.9' tail in p.a. 237 deg);