COBS - Comet OBServation database

Recent Comet Brightness Estimates

13P/Olbers
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
apr 27.10, 16.2, 0.6' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD); 09.34, 16.7, 0.6' (J. Maikner, Comet Hunter Observatory2, New Ringgold, 0.305-m Hyperboloid astro-camera + CCD);

14P/Wolf
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
apr 24.29, 20.7, -- (J. Maikner, Comet Hunter Observatory2, New Ringgold, 0.305-m Hyperboloid astro-camera + CCD);

29P/Schwassmann-Wachmann
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
apr 30.47, 13.0, 1.4' (O. Miyazaki, 0.32-m Newtonian); 29.84, 13.5, 4.3' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 28.90, 12.9, 2.6' (A. Pearce, Skygems Namibia Remote Observatory, 0.45-m Schmidt-Cassegrain + CCD); 28.88, 15.0, 1.5' (M. Mašek, Hodkovice n M., 0.2-m Newtonian + CCD); 28.85, 13.4, 2.3' (M. Mašek, Hodkovice n M., 0.2-m Newtonian + CCD); 28.83, 13.3, 5' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 27.93, 12.9, 3.9' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD); 27.90, 11.7, 6' (J. Chambó Bris, Valles, Valencia, Spain, 0.2-m Newtonian + CCD); 27.90, 16.5, 0.38' (S. Shurpakov, 0.41-m Newtonian + CCD; 1' tail in p.a. 41 deg); 27.89, 11.2, 7' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain); 27.84, 13.3, 4.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 27.72, 13.6, 1.8' (A. Pearce, Skygems Namibia Remote Observatory, 0.45-m Schmidt-Cassegrain + CCD); 26.94, 12.6, 0.7' (U. Pilz, 0.32-m Newtonian); 26.93, 13.3, 3.2' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD); 26.89, 12.3, 7' (D. Heggie, ASERO, Trevinca, Spain, 0.303-m Newtonian + CCD); 26.89, 12.4, 3.6' (A. Pearce, Skygems Namibia Remote Observatory, 0.45-m Schmidt-Cassegrain + CCD); 26.89, 13.9, 2.4' (T. Csorgei, 0.28-m Schmidt-Cassegrain + CCD); 26.88, 13.2, 5' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 24.88, 12.5, 5.9' (D. Heggie, ASERO, Trevinca, Spain, 0.303-m Newtonian + CCD); 24.75, 13.6, 1.9' (A. Pearce, Skygems Namibia Remote Observatory, 0.45-m Schmidt-Cassegrain + CCD); 24.54, 13.7, 1.8' (A. Pearce, Perth Observatory, 0.35-m Schmidt-Cassegrain + CCD); 24.00, 11.3, 7' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain); 23.91, 15.3, 1.6' (R. Arnold, Skye, Scotland, 0.2-m Schmidt-Cassegrain); 23.88, 12.4, 4.9' (D. Heggie, ASERO, Trevinca, Spain, 0.303-m Newtonian + CCD); 23.72, 13.6, 1.8' (A. Pearce, Skygems Namibia Remote Observatory, 0.45-m Schmidt-Cassegrain + CCD); 22.92, 13.2, 3.4' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD); 22.85, 13.4, 4.3' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 21.86, 13.2, 5' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 21.81, 13.8, 1.7' (A. Pearce, Skygems Namibia Remote Observatory, 0.36-m Ritchey-Chretien + CCD); 20.94, 12.7, 1.8' (W. Kutschera, 0.508-m Newtonian); 20.60, 14.7, 1' (A. Pearce, Perth Observatory, 0.35-m Schmidt-Cassegrain + CCD); 19.91, 13.1, 5' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 19.86, 14.3, 2' (T. Csorgei, 0.28-m Schmidt-Cassegrain + CCD); 18.57, 13.6, 2.1' (A. Pearce, Perth Observatory, 0.35-m Schmidt-Cassegrain + CCD); 18.50, 12.5, 3.4' (K. Yoshimoto, 0.203-m Ritchey-Chretien + CCD); 17.71, 16.6, 3' (J. Xiong, Daocheng, China(remote,O40), 0.203-m Newtonian + CCD); 17.59, 15.4, 0.6' (A. Pearce, Perth Observatory, 0.35-m Schmidt-Cassegrain + CCD); 16.87, 13.7, 3.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 15.49, 15.8, 0.6' (A. Pearce, Perth Observatory, 0.35-m Schmidt-Cassegrain + CCD); 14.84, 12.4, 2.7' (E. Bryssinck, 0.4-m Newtonian + CCD); 14.48, 15.4, 0.9' (A. Pearce, Perth Observatory, 0.35-m Schmidt-Cassegrain + CCD); 12.83, 13.8, 3.3' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 12.48, 14.6, 1' (A. Pearce, Perth Observatory, 0.35-m Schmidt-Cassegrain + CCD); 11.84, 12.6, 2.5' (E. Bryssinck, 0.4-m Newtonian + CCD); 09.89, 15.0, 1.4' (D. Heggie, ASERO, Trevinca, Spain, 0.303-m Newtonian + CCD); 08.89, 15.1, 0.4' (D. Heggie, ASERO, Trevinca, Spain, 0.303-m Newtonian + CCD); 07.89, 15.5, 0.4' (D. Heggie, ASERO, Trevinca, Spain, 0.303-m Newtonian + CCD); 06.90, 14.2, 3.1' (D. Heggie, ASERO, Trevinca, Spain, 0.303-m Newtonian + CCD); 05.49, 13.0, 1.9' (A. Pearce, Perth Observatory, 0.35-m Schmidt-Cassegrain + CCD); 04.93, 14.0, 2' (T. Csorgei, 0.28-m Schmidt-Cassegrain + CCD); 04.84, 12.5, 4' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 04.83, 14.8, 0.77' (S. Shurpakov, 0.2-m Schmidt-Newtonian + CCD); 04.58, 13.8, 1.2' (T. Thaluang, Akin Observatory, Rayong (MPC O51), 0.26-m Cassegrain reflector + CCD); 03.94, 11.1, 14' (S. Fritsche, Koeditz, 0.279-m Newtonian + CCD); 03.89, 13.1, 2.1' (J. Zakrajšek, Crni Vrh Observatory (MPC 106), 0.6-m Prime focus of a reflector + CCD); 03.88, 11.1, 11' (T. Lehmann, Weimar, 0.279-m Newtonian + CCD); 03.86, 11.5, 3.9' (E. Bryssinck, 0.4-m Newtonian + CCD); 03.85, 13.7, 2.4' (T. Csorgei, 0.28-m Schmidt-Cassegrain + CCD); 03.82, 12.8, 5' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 02.88, 12.7, 5' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 02.82, 11.0, 12' (S. Fritsche, Koeditz, 0.279-m Newtonian + CCD); 01.93, 12.7, 2.2' (W. Kutschera, 0.508-m Newtonian); 01.92, 10.9, 15' (S. Fritsche, Koeditz, 0.279-m Newtonian + CCD); 01.86, 12.2, 0.7' (M. Paling, Appledorne Observatory, 0.123-m Refractor + CCD); 01.85, 10.9, 5.7' (E. Bryssinck, 0.4-m Newtonian + CCD); 01.54, 14.7, 0.7' (A. Pearce, Perth Observatory, 0.35-m Schmidt-Cassegrain + CCD);

30P/Reinmuth
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
apr 19.90, 18.8, 0.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 05.99, 18.7, 0.38' (K. Hills, 0.5-m Newtonian + CCD);

49P/Arend-Rigaux
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
apr 29.82, 15.2, 1.3' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 28.81, 14.7, 1.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 27.81, 14.8, 2.3' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 26.81, 15.0, 0.7' (T. Csorgei, 0.28-m Schmidt-Cassegrain + CCD); 22.81, 14.6, 3' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 21.81, 14.2, 3.3' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 19.80, 15.7, 0.9' (T. Csorgei, 0.28-m Schmidt-Cassegrain + CCD); 04.81, 13.7, 2.9' (T. Lehmann, Weimar, 0.279-m Newtonian + CCD);

65P/Gunn
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
apr 08.17, 16.1, 0.4' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);

88P/Howell
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
apr 24.55, 17.7, 0.46' (A. Pearce, Perth Observatory, 0.35-m Schmidt-Cassegrain + CCD); 20.61, 17.8, 0.5' (A. Pearce, Perth Observatory, 0.35-m Schmidt-Cassegrain + CCD); 05.50, 17.7, 0.4' (A. Pearce, Perth Observatory, 0.35-m Schmidt-Cassegrain + CCD); 04.88, 18.3, 0.38' (K. Hills, 0.5-m Newtonian + CCD); 03.95, 18.3, 0.5' (T. Lehmann, Weimar, 0.279-m Newtonian + CCD); 03.53, 18.6, 0.3' (K. Yoshimoto, 0.203-m Ritchey-Chretien + CCD); 01.55, 17.5, 0.3' (A. Pearce, Perth Observatory, 0.35-m Schmidt-Cassegrain + CCD);

234P/LINEAR
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
apr 05.17, 19.6, 0.38' (K. Hills, 0.5-m Newtonian + CCD);

235P/LINEAR
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
apr 25.06, 19.0, -- (J. Maikner, Comet Hunter Observatory2, New Ringgold, 0.305-m Hyperboloid astro-camera + CCD);

472P/NEAT-LINEAR
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
apr 29.83, 17.2, 0.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 28.83, 16.5, 0.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 19.84, 16.9, 0.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 06.50, 16.9, 0.4' (A. Pearce, Perth Observatory, 0.35-m Schmidt-Cassegrain + CCD);

487P/SidingSpring
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
apr 19.87, 19.0, 0.19' (S. Shurpakov, 0.41-m Newtonian + CCD);

496P/Hill
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
apr 29.83, 15.6, 1.3' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 28.84, 15.8, 1.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 27.85, 17.0, 0.34' (S. Shurpakov, 0.41-m Newtonian + CCD); 27.84, 16.0, 1.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 26.85, 15.9, 1.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 22.82, 16.2, 1.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 21.83, 15.7, 1.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 19.90, 17.2, 0.34' (S. Shurpakov, 0.41-m Newtonian + CCD); 19.85, 15.7, 1' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 18.85, 16.1, -- (G. van Buitenen, Dordrecht, NL (G06), 0.203-m Ritchey-Chretien + CCD); 17.67, 16.7, 0.4' (J. Xiong, Daocheng, China(remote,O40), 0.203-m Newtonian + CCD); 16.84, 15.7, 1.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 12.85, 16.1, 1.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 04.88, 16.3, 1.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 02.90, 16.5, 1' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 01.85, 15.1, 1.2' (S. Fritsche, Koeditz, 0.279-m Newtonian + CCD; 0.4' tail in p.a. 79 deg);

497P/Spacewatch-PANSTARRS
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
apr 09.04, 19.4, -- (J. Maikner, Comet Hunter Observatory2, New Ringgold, 0.305-m Hyperboloid astro-camera + CCD);

499P/Catalina
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
apr 19.90, 18.0, 1' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 0.3' tail in p.a. 162 deg); 03.81, 17.0, 0.9' (S. Fritsche, Koeditz, 0.279-m Newtonian + CCD; 0.6' tail in p.a. 136 deg); 01.88, 17.0, 0.9' (S. Fritsche, Koeditz, 0.279-m Newtonian + CCD; 0.4' tail in p.a. 100 deg);

C/2014 UN271 (Bernardinelli-Bernstein)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
apr 18.52, 15.3, 0.6' (A. Pearce, Perth Observatory, 0.35-m Schmidt-Cassegrain + CCD); 16.49, 15.7, 0.6' (A. Pearce, Perth Observatory, 0.35-m Schmidt-Cassegrain + CCD); 07.51, 15.8, 0.5' (A. Pearce, Perth Observatory, 0.35-m Schmidt-Cassegrain + CCD); 02.51, 15.6, 0.5' (A. Pearce, Perth Observatory, 0.35-m Schmidt-Cassegrain + CCD); 01.50, 15.8, 0.6' (A. Pearce, Perth Observatory, 0.35-m Schmidt-Cassegrain + CCD);

C/2017 K2 (PANSTARRS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
apr 28.82, 17.4, 1' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 26.84, 17.3, 0.5' (T. Csorgei, 0.28-m Schmidt-Cassegrain + CCD); 19.81, 17.6, 0.6' (T. Csorgei, 0.28-m Schmidt-Cassegrain + CCD); 04.81, 16.8, 1.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 03.83, 17.0, 0.6' (T. Csorgei, 0.28-m Schmidt-Cassegrain + CCD);

C/2019 T4 (ATLAS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
apr 29.06, 18.8, 0.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD);

C/2019 U5 (PANSTARRS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
apr 06.55, 16.5, 0.5' (A. Pearce, Perth Observatory, 0.35-m Schmidt-Cassegrain + CCD); 05.52, 16.7, 0.6' (A. Pearce, Perth Observatory, 0.35-m Schmidt-Cassegrain + CCD); 01.48, 16.6, 0.5' (A. Pearce, Perth Observatory, 0.35-m Schmidt-Cassegrain + CCD);

C/2020 K1 (PANSTARRS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
apr 06.54, 17.8, 0.4' (A. Pearce, Perth Observatory, 0.35-m Schmidt-Cassegrain + CCD); 01.51, 17.3, 0.5' (A. Pearce, Perth Observatory, 0.35-m Schmidt-Cassegrain + CCD);

C/2021 G1 (Leonard)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
apr 28.26, 15.1, -- (J. Maikner, Comet Hunter Observatory2, New Ringgold, 0.305-m Hyperboloid astro-camera + CCD);

C/2021 G2 (Atlas)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
apr 29.89, 14.1, 2.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 7.3' tail in p.a. 238 deg); 29.75, 13.2, 1.2' (A. Pearce, Nedlands, Perth, 0.05-m Refractor + CCD; 1.5' tail in p.a. 243 deg); 29.06, 14.1, 3.3' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 9.7' tail in p.a. 236 deg); 29.00, 13.3, 1.4' (M. Mašek, Hodkovice n M., 0.2-m Newtonian + CCD; 1.5' tail in p.a. 228 deg); 28.98, 13.9, 1.1' (M. Mašek, Hodkovice n M., 0.2-m Newtonian + CCD; 0.5' tail in p.a. 215 deg); 28.83, 13.5, 1.1' (A. Pearce, Nedlands, Perth, 0.05-m Refractor + CCD); 28.00, 14.2, 2.2' (M. Lošťák, 0.2-m Newtonian + CCD); 28.00, 13.2, 1.8' (M. Lošťák, 0.2-m Newtonian + CCD); 27.99, 14.9, 0.62' (S. Shurpakov, 0.41-m Newtonian + CCD); 27.83, 13.8, 1.1' (A. Pearce, Nedlands, Perth, 0.05-m Refractor + CCD; 0.9' tail in p.a. 233 deg); 27.10, 13.5, 0.8' (W. Kutschera, 0.508-m Newtonian); 26.95, 13.1, 1' (U. Pilz, 0.32-m Newtonian); 26.92, 14.1, 1.4' (T. Csorgei, 0.28-m Schmidt-Cassegrain + CCD; 4.5' tail in p.a. 238 deg); 26.90, 14.2, 3.3' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 7.6' tail in p.a. 235 deg); 26.84, 13.8, 1.1' (A. Pearce, Nedlands, Perth, 0.05-m Refractor + CCD; 1.1' tail in p.a. 229 deg); 25.85, 13.7, 1.1' (A. Pearce, Nedlands, Perth, 0.05-m Refractor + CCD); 25.63, 13.6, 1.2' (K. Yoshimoto, 0.203-m Ritchey-Chretien + CCD; 9' tail in p.a. 240 deg); 25.62, 13.5, 1.4' (A. Pearce, Perth Observatory, 0.35-m Schmidt-Cassegrain + CCD; 7.9' tail in p.a. 235 deg); 24.84, 13.7, 1.2' (A. Pearce, Nedlands, Perth, 0.05-m Refractor + CCD; 1' tail in p.a. 242 deg); 24.02, 11.7, 2.5' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain); 23.00, 13.4, 1.4' (A. Pearce, Skygems Namibia Remote Observatory, 0.45-m Schmidt-Cassegrain + CCD; 19.9' tail in p.a. 237 deg); 21.13, 13.3, 1' (W. Kutschera, 0.508-m Newtonian); 20.69, 13.5, 1.4' (A. Pearce, Perth Observatory, 0.35-m Schmidt-Cassegrain + CCD; 7.7' tail in p.a. 237 deg); 20.09, 13.1, 0.8' (W. Kutschera, 0.508-m Newtonian); 20.05, 14.3, 2.3' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 7.6' tail in p.a. 242 deg); 19.99, 15.5, 0.34' (S. Shurpakov, 0.41-m Newtonian + CCD); 19.89, 14.8, 0.5' (T. Csorgei, 0.28-m Schmidt-Cassegrain + CCD); 18.59, 13.8, 0.7' (Y. Yamaguchi, 0.13-m Hyperboloid astro-camera + CCD); 17.87, 14.9, 0.3' (J. Xiong, Daocheng, China(remote,O40), 0.203-m Newtonian + CCD); 13.08, 14.3, 1.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 10.65, 14.0, 1.1' (A. Pearce, Nedlands, 0.05-m Refractor + CCD); 08.09, 13.6, 1.1' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD); 07.74, 13.8, 1.3' (K. Harikae, 0.15-m Newtonian + CCD); 07.15, 11.6, 2' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain); 06.74, 13.8, 1.3' (A. Pearce, Perth Observatory, 0.35-m Schmidt-Cassegrain + CCD; 8.3' tail in p.a. 237 deg); 06.72, 13.9, 1.1' (D. Swan, Siding Spring, Coonabarabran, NSW, Aus, 0.51-m Cassegrain reflector + CCD); 06.27, 11.9, 1' (M. Goiato, 0.22-m Newtonian); 04.98, 14.1, 1.4' (T. Csorgei, 0.28-m Schmidt-Cassegrain + CCD; 2.5' tail in p.a. 237 deg); 04.95, 14.0, 2.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 5.5' tail in p.a. 240 deg); 04.74, 13.8, 1' (T. Thaluang, Akin Observatory, Rayong (MPC O51), 0.26-m Cassegrain reflector + CCD; 10.1' tail in p.a. 237 deg); 04.07, 11.5, 2.2' (C. Harder, Jeersdorf f, 0.531-m Newtonian); 03.06, 13.7, 1.7' (T. Lehmann, Weimar, 0.279-m Newtonian + CCD; 0.15° tail in p.a. 239 deg); 02.94, 14.2, 2.3' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 4.1' tail in p.a. 244 deg); 02.14, 12.9, 1.1' (W. Kutschera, 0.508-m Newtonian); 02.12, 13.8, 2.4' (S. Fritsche, Koeditz, 0.279-m Newtonian + CCD); 01.65, 13.7, 1.4' (A. Pearce, Perth Observatory, 0.35-m Schmidt-Cassegrain + CCD; 5.8' tail in p.a. 237 deg);

C/2022 E2 (ATLAS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
apr 27.80, 15.2, 0.38' (S. Shurpakov, 0.41-m Newtonian + CCD); 22.80, 14.9, 1.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 21.80, 14.6, 1.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 19.85, 15.3, 0.34' (S. Shurpakov, 0.41-m Newtonian + CCD); 19.80, 15.2, 1.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 16.81, 15.0, 1.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 12.80, 15.3, 1.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 04.80, 15.1, 1.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 1.4' tail in p.a. 53 deg); 03.82, 14.5, 1' (T. Lehmann, Weimar, 0.279-m Newtonian + CCD; 0.12° tail in p.a. 63 deg); 03.79, 15.2, 1.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 2.4' tail in p.a. 51 deg); 01.80, 14.4, 1.5' (S. Fritsche, Koeditz, 0.279-m Newtonian + CCD; 0.09° tail in p.a. 63 deg);

C/2022 QE78 (ATLAS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
apr 29.82, 16.2, 1.3' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 27.86, 15.6, 0.28' (S. Shurpakov, 0.41-m Newtonian + CCD); 27.82, 16.3, 1' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 26.86, 15.9, 1.3' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 24.46, 15.7, 0.5' (A. Pearce, Perth Observatory, 0.35-m Schmidt-Cassegrain + CCD); 22.88, 16.0, 0.4' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD); 22.83, 16.0, 1.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 21.84, 16.3, 1.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 19.83, 16.2, 1' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 19.83, 15.6, 0.5' (T. Csorgei, 0.28-m Schmidt-Cassegrain + CCD; 1.3' tail in p.a. 237 deg); 18.47, 15.4, 0.6' (A. Pearce, Perth Observatory, 0.35-m Schmidt-Cassegrain + CCD); 16.83, 16.0, 1.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 12.81, 15.7, 1' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 06.49, 15.6, 0.5' (A. Pearce, Perth Observatory, 0.35-m Schmidt-Cassegrain + CCD); 04.91, 15.9, 0.4' (T. Csorgei, 0.28-m Schmidt-Cassegrain + CCD); 03.82, 15.9, 0.2' (T. Csorgei, 0.28-m Schmidt-Cassegrain + CCD); 03.80, 16.3, 1' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 02.10, 16.2, -- (J. Maikner, Comet Hunter Observatory2, New Ringgold, 0.305-m Hyperboloid astro-camera + CCD); 01.82, 15.0, 0.6' (E. Bryssinck, 0.4-m Newtonian + CCD);

C/2022 R6 (PANSTARRS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
apr 24.51, 16.5, 0.5' (A. Pearce, Perth Observatory, 0.35-m Schmidt-Cassegrain + CCD); 18.54, 16.2, 0.4' (A. Pearce, Perth Observatory, 0.35-m Schmidt-Cassegrain + CCD);

C/2023 A3 (Tsuchinshan-ATLAS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
apr 29.07, 14.8, 2.3' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 28.06, 14.3, 1.8' (M. Lošťák, 0.2-m Newtonian + CCD); 28.06, 14.8, 1.8' (M. Lošťák, 0.2-m Newtonian + CCD); 28.03, 16.0, 0.29' (S. Shurpakov, 0.41-m Newtonian + CCD); 27.08, 14.1, 1.7' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD); 25.10, 14.7, 0.7' (A. Pearce, Tecnosky Astropark, Felizzano, 0.3-m Ritchey-Chretien + CCD); 21.16, 13.3, 1.9' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD); 20.06, 14.3, 1.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 13.07, 13.6, 2.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 09.31, 15.8, -- (J. Maikner, Comet Hunter Observatory2, New Ringgold, 0.305-m Hyperboloid astro-camera + CCD); 08.15, 11.7, 4.5' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD); 07.73, 13.9, 0.9' (K. Harikae, 0.15-m Newtonian + CCD); 05.18, 11.5, 4.9' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD); 05.18, 12.3, 3.2' (K. Hills, 0.5-m Newtonian + CCD); 05.08, 11.1, 7.3' (T. Lehmann, Weimar, 0.279-m Newtonian + CCD; 0.77° tail in p.a. 86 deg); 04.09, 14.7, 0.2' (C. Harder, Jeersdorf f, 0.531-m Newtonian); 04.09, 11.3, 6.2' (T. Lehmann, Weimar, 0.279-m Newtonian + CCD; 0.87° tail in p.a. 86 deg); 04.08, 11.3, 4.6' (M. Lošťák, 0.2-m Newtonian + CCD); 04.08, 12.3, 4.6' (M. Lošťák, 0.2-m Newtonian + CCD); 03.82, 13.6, 1' (K. Yoshimoto, 0.203-m Ritchey-Chretien + CCD; 1.8' tail in p.a. 280 deg);

C/2023 C2 (ATLAS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
apr 29.07, 15.2, 2.3' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 1.7' tail in p.a. 237 deg); 21.17, 15.6, 0.4' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD); 20.08, 15.0, 2.3' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD);

C/2023 F3 (ATLAS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
apr 25.68, 16.7, 0.5' (A. Pearce, Perth Observatory, 0.35-m Schmidt-Cassegrain + CCD); 24.57, 16.6, 0.5' (A. Pearce, Perth Observatory, 0.35-m Schmidt-Cassegrain + CCD); 20.64, 16.6, 0.5' (A. Pearce, Perth Observatory, 0.35-m Schmidt-Cassegrain + CCD); 18.59, 16.8, 0.5' (A. Pearce, Perth Observatory, 0.35-m Schmidt-Cassegrain + CCD); 01.59, 16.6, 0.5' (A. Pearce, Perth Observatory, 0.35-m Schmidt-Cassegrain + CCD);

C/2023 H5 (Lemmon)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
apr 29.89, 16.1, 1.3' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 0.7' tail in p.a. 175 deg); 28.93, 16.0, 0.5' (M. Mašek, Hodkovice n M., 0.2-m Newtonian + CCD; 0.4' tail in p.a. 160 deg); 28.91, 16.4, 0.4' (M. Mašek, Hodkovice n M., 0.2-m Newtonian + CCD; 0.4' tail in p.a. 162 deg); 28.87, 16.2, 1.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 2.1' tail in p.a. 175 deg); 27.95, 16.8, 0.4' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD); 27.90, 17.0, 0.8' (M. Lošťák, 0.2-m Newtonian + CCD); 27.90, 16.3, 0.6' (M. Lošťák, 0.2-m Newtonian + CCD); 27.85, 16.7, 1.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 2.1' tail in p.a. 176 deg); 26.84, 16.8, 1.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 2.2' tail in p.a. 177 deg); 23.90, 16.8, 0.3' (R. Arnold, Skye, Scotland, 0.2-m Schmidt-Cassegrain); 22.85, 16.8, 1.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 1.9' tail in p.a. 180 deg); 21.86, 16.9, 1.3' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 0.8' tail in p.a. 180 deg); 21.05, 16.3, 0.4' (M. Mašek, Hodkovice n M., 0.2-m Newtonian + CCD); 21.05, 16.2, 0.4' (M. Mašek, Hodkovice n M., 0.2-m Newtonian + CCD; 0.9' tail in p.a. 176 deg); 19.95, 16.5, 0.29' (S. Shurpakov, 0.41-m Newtonian + CCD; 1' tail in p.a. 184 deg); 19.86, 16.7, 1.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 1.9' tail in p.a. 181 deg); 17.77, 16.6, 0.3' (J. Xiong, Daocheng, China(remote,O40), 0.203-m Newtonian + CCD; 1" tail in p.a. 180 deg); 16.86, 16.8, 1' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 1.6' tail in p.a. 181 deg); 12.84, 16.9, 1' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 1.5' tail in p.a. 182 deg); 08.86, 15.8, 0.5' (E. Bryssinck, 0.4-m Newtonian + CCD); 08.13, 16.8, 0.4' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD); 04.97, 17.7, 0.4' (T. Csorgei, 0.28-m Schmidt-Cassegrain + CCD; 1.7' tail in p.a. 189 deg); 04.89, 16.4, 0.38' (K. Hills, 0.5-m Newtonian + CCD); 04.83, 16.7, 1' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 1.7' tail in p.a. 185 deg); 03.98, 16.4, 0.7' (S. Fritsche, Koeditz, 0.279-m Newtonian + CCD; 2.2' tail in p.a. 189 deg); 03.94, 17.2, 0.4' (M. Lošťák, 0.2-m Newtonian + CCD); 03.94, 16.2, 0.4' (M. Lošťák, 0.2-m Newtonian + CCD); 03.90, 16.5, 0.39' (J. Zakrajšek, Crni Vrh Observatory (MPC 106), 0.6-m Prime focus of a reflector + CCD; 2.6' tail in p.a. 188 deg); 03.83, 17.1, 1' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 1.5' tail in p.a. 184 deg); 02.97, 16.3, 0.7' (T. Lehmann, Weimar, 0.279-m Newtonian + CCD; 0.06° tail in p.a. 187 deg); 02.91, 16.9, 1' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 1.3' tail in p.a. 186 deg); 02.00, 16.3, 0.7' (S. Fritsche, Koeditz, 0.279-m Newtonian + CCD; 0.05° tail in p.a. 189 deg);

C/2023 Q1 (PANSTARRS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
apr 26.93, 18.1, 0.4' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD); 19.88, 17.7, 1' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 17.74, 17.8, 0.3' (J. Xiong, Daocheng, China(remote,O40), 0.203-m Newtonian + CCD); 04.85, 17.6, 1' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 03.90, 16.5, 1.3' (S. Fritsche, Koeditz, 0.279-m Newtonian + CCD; 1.4' tail in p.a. 285 deg); 02.92, 17.1, 1' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 02.88, 15.9, 2.5' (T. Lehmann, Weimar, 0.279-m Newtonian + CCD); 01.96, 16.5, 1.3' (S. Fritsche, Koeditz, 0.279-m Newtonian + CCD; 0.8' tail in p.a. 293 deg); 01.01, 17.6, 0.38' (K. Hills, 0.5-m Newtonian + CCD);

C/2023 T3 (Fuls)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
apr 25.71, 15.3, 0.9' (A. Pearce, Perth Observatory, 0.35-m Schmidt-Cassegrain + CCD); 24.62, 15.5, 0.9' (A. Pearce, Perth Observatory, 0.35-m Schmidt-Cassegrain + CCD); 20.66, 15.4, 0.7' (A. Pearce, Perth Observatory, 0.35-m Schmidt-Cassegrain + CCD); 18.62, 16.0, 0.5' (A. Pearce, Perth Observatory, 0.35-m Schmidt-Cassegrain + CCD); 01.61, 15.7, 0.6' (A. Pearce, Perth Observatory, 0.35-m Schmidt-Cassegrain + CCD; 1.2' tail in p.a. 277 deg);

C/2024 A1 (ATLAS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
apr 29.83, 16.1, 1' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 26.90, 16.9, 0.4' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD); 24.49, 16.3, 0.4' (A. Pearce, Perth Observatory, 0.35-m Schmidt-Cassegrain + CCD); 21.84, 15.5, 1' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 19.82, 15.2, 1' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 18.48, 16.4, 0.4' (A. Pearce, Perth Observatory, 0.35-m Schmidt-Cassegrain + CCD); 16.82, 16.5, 0.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 06.52, 16.4, 0.4' (A. Pearce, Perth Observatory, 0.35-m Schmidt-Cassegrain + CCD); 03.81, 16.5, 0.4' (T. Csorgei, 0.28-m Schmidt-Cassegrain + CCD);

C/2024 B1 (Lemmon)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
apr 06.09, 17.2, 0.38' (K. Hills, 0.5-m Newtonian + CCD);

C/2024 E1 (Wierzchos)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
apr 29.05, 17.1, 0.4' (M. Mašek, Hodkovice n M., 0.2-m Newtonian + CCD); 29.03, 16.6, 0.5' (M. Mašek, Hodkovice n M., 0.2-m Newtonian + CCD); 28.88, 16.9, 1.3' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 0.4' tail in p.a. 274 deg); 27.95, 16.1, 0.7' (M. Lošťák, 0.2-m Newtonian + CCD); 27.95, 17.0, 0.7' (M. Lošťák, 0.2-m Newtonian + CCD); 27.06, 16.9, 0.4' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD); 26.89, 17.2, 1.3' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 0.4' tail in p.a. 283 deg); 25.61, 16.6, 0.3' (K. Yoshimoto, 0.203-m Ritchey-Chretien + CCD); 22.86, 17.0, 0.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 0.3' tail in p.a. 295 deg); 19.87, 17.5, 1' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 0.3' tail in p.a. 294 deg); 10.13, 16.9, 0.4' (D. Heggie, ASERO, Trevinca, Spain, 0.303-m Newtonian + CCD; 0.6' tail in p.a. 297 deg); 09.14, 17.0, 0.2' (D. Heggie, ASERO, Trevinca, Spain, 0.303-m Newtonian + CCD; 0.8' tail in p.a. 285 deg); 08.13, 17.3, 0.2' (D. Heggie, ASERO, Trevinca, Spain, 0.303-m Newtonian + CCD; 0.2' tail in p.a. 281 deg); 07.08, 17.0, 0.3' (D. Heggie, ASERO, Trevinca, Spain, 0.303-m Newtonian + CCD); 06.07, 17.2, 0.38' (K. Hills, 0.5-m Newtonian + CCD); 05.02, 17.3, 0.4' (T. Lehmann, Weimar, 0.279-m Newtonian + CCD; 0.4' tail in p.a. 283 deg); 04.03, 17.1, 0.5' (T. Lehmann, Weimar, 0.279-m Newtonian + CCD; 0.5' tail in p.a. 297 deg); 03.99, 16.6, 0.6' (M. Lošťák, 0.2-m Newtonian + CCD); 03.99, 17.8, 0.5' (M. Lošťák, 0.2-m Newtonian + CCD); 03.02, 17.1, 0.5' (T. Lehmann, Weimar, 0.279-m Newtonian + CCD; 0.4' tail in p.a. 288 deg); 02.93, 17.9, 0.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 02.09, 17.2, 0.9' (S. Fritsche, Koeditz, 0.279-m Newtonian + CCD; 0.4' tail in p.a. 293 deg);

C/2024 L5 (ATLAS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
apr 29.89, 15.7, 1.3' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 3.7' tail in p.a. 118 deg); 28.85, 15.5, 1.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 2.7' tail in p.a. 116 deg); 27.93, 15.8, 0.29' (S. Shurpakov, 0.41-m Newtonian + CCD; 0.5' tail in p.a. 104 deg); 25.69, 15.5, 0.5' (A. Pearce, Perth Observatory, 0.35-m Schmidt-Cassegrain + CCD); 25.54, 15.6, 0.5' (K. Yoshimoto, 0.203-m Ritchey-Chretien + CCD; 1' tail in p.a. 115 deg); 24.61, 15.4, 0.6' (A. Pearce, Perth Observatory, 0.35-m Schmidt-Cassegrain + CCD; 1.4' tail in p.a. 116 deg); 20.58, 15.2, 0.7' (A. Pearce, Perth Observatory, 0.35-m Schmidt-Cassegrain + CCD; 2.4' tail in p.a. 113 deg); 18.89, 14.8, -- (G. van Buitenen, Dordrecht, NL (G06), 0.203-m Ritchey-Chretien + CCD); 18.61, 15.5, 0.6' (A. Pearce, Perth Observatory, 0.35-m Schmidt-Cassegrain + CCD); 17.76, 15.8, 0.7' (J. Xiong, Daocheng, China(remote,O40), 0.203-m Newtonian + CCD; 2" tail); 17.57, 15.5, 0.5' (A. Pearce, Perth Observatory, 0.35-m Schmidt-Cassegrain + CCD); 08.06, 15.6, 0.4' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD); 05.12, 15.5, 0.38' (K. Hills, 0.5-m Newtonian + CCD); 02.64, 15.5, 0.5' (A. Pearce, Perth Observatory, 0.35-m Schmidt-Cassegrain + CCD); 01.58, 15.2, 0.6' (A. Pearce, Perth Observatory, 0.35-m Schmidt-Cassegrain + CCD);

C/2025 E1 (PANSTARRS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
apr 28.29, 16.8, -- (J. Maikner, Comet Hunter Observatory2, New Ringgold, 0.305-m Hyperboloid astro-camera + CCD);

C/2025 F2 (SWAN)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
apr 27.86, 8.4, 2.5' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain); 24.18, 9.2, 2' (V. Gonano, 20x80 Binoculars); 24.17, 8.7, 2' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain); 22.49, 9.3, 2.5' (M. Olason, Arizona, 0.05-m Refractor + CCD; 2' tail in p.a. 318 deg); 22.49, 9.6, 2.5' (M. Olason, Arizona, 0.05-m Refractor + CCD; 2' tail in p.a. 318 deg); 21.78, 9.3, 1.7' (O. Miyazaki, 0.32-m Newtonian); 21.48, 9.9, 2.5' (M. Olason, Arizona, 0.05-m Refractor + CCD; 2' tail in p.a. 315 deg); 21.13, 9.2, 1.7' (V. Gonano, Udine, Italy, 20x80 Binoculars); 20.78, 9.1, 4' (O. Miyazaki, 0.32-m Newtonian); 20.48, 9.8, 2.5' (M. Olason, Arizona, 0.05-m Refractor + CCD; 2' tail in p.a. 313 deg); 20.11, 10.5, 4' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 7.6' tail in p.a. 312 deg); 20.05, 10.6, 0.72' (S. Shurpakov, 0.41-m Newtonian + CCD; 4' tail in p.a. 316 deg); 18.49, 9.8, 2.5' (M. Olason, Arizona, 0.05-m Refractor + CCD; 2' tail in p.a. 309 deg); 18.17, 9.6, 2' (J. Chambó Bris, Valles, Valencia, Spain, 0.2-m Newtonian + CCD; 6' tail in p.a. 310 deg); 18.12, [9.1, -- (M. Deconinck, Artignosc-sur-Verdon, Provence, France, 25x120 Binoculars); 17.49, 9.6, 3' (M. Olason, Arizona, 0.05-m Refractor + CCD); 16.49, 9.6, 3' (M. Olason, Arizona, 0.05-m Refractor + CCD); 16.18, 8.6, 2' (J. Chambó Bris, Valles, Valencia, Spain, 0.2-m Newtonian + CCD; 30' tail in p.a. 311 deg); 15.49, 9.4, 3' (M. Olason, Arizona, 0.05-m Refractor + CCD; 53' tail in p.a. 309 deg); 14.13, 8.9, 2.26' (N. James, 0.051-m Refractor + CCD); 13.49, 9.3, 3' (M. Olason, Arizona, 0.05-m Refractor + CCD); 13.12, 8.9, 2' (V. Gonano, Udine, Italy, 20x80 Binoculars); 13.11, 9.4, 5' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD; 0.5° tail in p.a. 306 deg); 13.10, 8.9, 1.1' (T. Sciezor, Cracow, 0.06-m Camera lens + CCD; 25' tail in p.a. 314 deg); 13.10, 9.2, 1.4' (T. Csorgei, 0.105-m Refractor; 4.2' tail in p.a. 313 deg); 13.09, 8.3, 2' (C. Harder, Jeersdorf f, 0.252-m Newtonian); 13.09, 8.5, 2' (P. Guzik, 25x100 Binoculars); 13.09, 8.5, 1.5' (M. Kwinta, 15x70 Binoculars); 12.49, 9.3, 3' (M. Olason, Arizona, 0.05-m Refractor + CCD); 12.13, 9.6, 4.4' (P. Dekelver, 0.3-m Newtonian + CCD; 0.5° tail in p.a. 306 deg); 11.97, 8.0, 3.2' (A. Novichonok, Chalna fields, Karelia, Russia, 0.029-m Camera lens + CCD; 0.8° tail in p.a. 305 deg); 11.49, 8.9, 3' (M. Olason, Arizona, 0.05-m Refractor + CCD); 11.15, 9.5, 2.5' (V. Gonano, Udine, Italy, 20x80 Binoculars); 11.14, 9.6, 2.26' (N. James, 0.051-m Refractor + CCD); 11.14, 9.7, 2.9' (P. Dekelver, 0.3-m Newtonian + CCD; 29.6' tail in p.a. 307 deg); 10.49, 9.3, 3' (M. Olason, Arizona, 0.05-m Refractor + CCD); 10.10, 8.5, 1.5' (J. Warell, Lindby (K60), 40x100 Binoculars); 09.49, 9.3, 3' (M. Olason, Arizona, 0.05-m Refractor + CCD); 09.17, 9.5, -- (W. Souza, Bern,Switzerland, 0.15-m Newtonian + CCD); 09.15, 9.0, 2' (G. Pappa, Pedara,Sicily,Italy, 0.3-m Camera lens + CCD); 09.15, 8.8, 7.3' (P. Dekelver, 0.3-m Newtonian + CCD; 28.2' tail in p.a. 306 deg); 09.15, 8.3, 3' (V. Gonano, Udine, Italy, 20x80 Binoculars); 09.14, 8.6, 3.01' (N. James, 0.051-m Refractor + CCD); 08.99, 8.2, 2' (A. Novichonok, Chalna fields, Karelia, Russia, 0.08-m Refractor); 08.79, 7.8, 3.7' (O. Miyazaki, 18x50 Binoculars); 08.20, 8.1, 3.2' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD); 08.18, 7.8, 4.5' (J. Chambó Bris, Valles, Valencia, Spain, 0.2-m Newtonian + CCD; 1.25° tail in p.a. 300 deg); 08.16, 8.5, 4' (C. Labordena, La Serratella, 11x80 Binoculars); 08.16, 7.8, 2.9' (D. Swan, Newcastle upon Tyne, UK, 0.05-m Refractor + CCD); 08.16, 8.7, 4' (C. Labordena, La Serratella, 0.2-m Schmidt-Cassegrain); 08.15, 8.2, 3.4' (M. Collins, Everton, 0.254-m Schmidt-Cassegrain); 08.14, 7.5, 4' (A. Scholten, Eerbeek, 0.2-m Newtonian); 08.14, 7.5, 5' (A. Scholten, Eerbeek, 15x80 Binoculars); 07.99, 7.7, 2' (A. Novichonok, Chalna fields, 0.08-m Refractor); 07.91, 9.5, 3.3' (C. Guo, Daocheng Glacier Observatory, Daocheng county, Garze Tibetan autonomous prefecture, Sichuan Province, China, 0.279-m Cassegrain reflector + CCD; 1.2° tail in p.a. 296 deg); 07.80, 8.5, 1.8' (O. Miyazaki, 0.32-m Newtonian); 07.80, 8.8, -- (K. Imamura, Nakagawa, 0.05-m Refractor + CCD); 07.79, 8.4, 3' (K. Harikae, 0.15-m Newtonian + CCD; 15' tail in p.a. 295 deg); 07.18, 8.3, 4' (J. Chambó Bris, Valles, Valencia, Spain, 0.2-m Newtonian + CCD; 1° tail in p.a. 301 deg); 07.18, 7.9, 4' (J. Gonzalez Suarez, 15x70 Binoculars); 07.17, 8.3, 3' (V. Gonano, Udine, Italy, 20x80 Binoculars; 1.5° tail in p.a. 300 deg); 07.17, 8.2, 3.5' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain; 0.3° tail in p.a. 290 deg); 07.15, 8.1, 3.76' (N. James, 0.051-m Refractor + CCD); 07.15, 7.7, 3' (A. Scholten, Eerbeek, 0.2-m Newtonian); 07.14, 8.3, 3.8' (M. Collins, Everton, 0.254-m Schmidt-Cassegrain); 07.13, 8.1, 6.3' (S. Fritsche, Koeditz, 0.279-m Newtonian + CCD); 07.11, 7.9, 3.5' (C. Harder, Jeersdorf f, 0.252-m Newtonian; 6' tail in p.a. 300 deg); 07.00, 7.5, 5' (G. van Buitenen, Dordrecht, NL, 0.304-m Newtonian); 06.49, 8.4, 3' (M. Olason, Arizona, 0.05-m Refractor + CCD; 47' tail in p.a. 301 deg); 06.17, 9.6, 4' (C. Labordena, La Serratella, 0.2-m Schmidt-Cassegrain); 06.15, 8.0, 3.76' (N. James, 0.051-m Refractor + CCD); 06.13, 8.1, 5.2' (S. Fritsche, Koeditz, 0.279-m Newtonian + CCD); 06.10, 7.9, 3.5' (C. Harder, Görding/ DK, 0.197-m Newtonian); 06.02, 8.1, 2.5' (A. Novichonok, Chalna fields, 0.08-m Refractor); 05.19, 9.6, 2.1' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD); 05.18, 9.0, 2.9' (J. Chambó Bris, Valles, Valencia, Spain, 0.2-m Newtonian + CCD; 14' tail in p.a. 302 deg); 05.16, 9.6, 2.26' (N. James, 0.051-m Refractor + CCD); 05.15, 8.9, 2' (A. Scholten, Eerbeek, 0.2-m Newtonian); 05.13, 9.6, 5.2' (T. Lehmann, Weimar, 0.279-m Newtonian + CCD; 0.8° tail in p.a. 304 deg); 05.13, 9.0, 2.5' (M. Meyer, 0.152-m Refractor); 05.11, 9.0, 2.7' (C. Harder, Görding/ DK, 0.197-m Newtonian); 04.81, 10.7, 1.1' (O. Miyazaki, 0.32-m Newtonian); 04.14, 9.6, 3.2' (S. Fritsche, Koeditz, 0.279-m Newtonian + CCD); 04.13, 9.6, 5.3' (T. Lehmann, Weimar, 0.279-m Newtonian + CCD; 0.61° tail in p.a. 299 deg); 04.13, 9.2, 2' (M. Meyer, 0.254-m Newtonian); 04.12, 9.1, 2.7' (U. Pilz, 0.32-m Newtonian); 04.11, 9.6, 2.6' (C. Harder, Jeersdorf f, 0.531-m Newtonian); 04.09, 9.4, 2' (P. Guzik, 25x100 Binoculars); 03.83, 10.7, 1.4' (K. Yoshimoto, 0.203-m Ritchey-Chretien + CCD); 03.83, 9.8, 2.2' (K. Yoshimoto, 0.203-m Ritchey-Chretien + CCD; 35' tail in p.a. 295 deg); 03.83, 11.2, 0.5' (K. Yoshimoto, 0.203-m Ritchey-Chretien + CCD); 03.49, 10.0, 2' (M. Olason, Arizona, 0.05-m Refractor + CCD; 30' tail in p.a. 299 deg); 03.14, 10.4, 3.9' (T. Lehmann, Weimar, 0.279-m Newtonian + CCD; 0.26° tail in p.a. 302 deg); 03.13, 9.5, 2.2' (C. Harder, Jeersdorf h, 0.252-m Newtonian);

P/2009 KF37
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
apr 29.15, 20.7, -- (J. Maikner, Comet Hunter Observatory2, New Ringgold, 0.305-m Hyperboloid astro-camera + CCD);

P/2010 H2 (Vales)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
apr 04.04, [19.2, 0.5' (S. Fritsche, Koeditz, 0.279-m Newtonian + CCD); 02.05, 15.5, 0.6' (W. Kutschera, 0.508-m Newtonian); 02.05, [18.0, -- (S. Fritsche, Koeditz, 0.279-m Newtonian + CCD);

P/2010 LH155
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
apr 25.11, 18.2, -- (J. Maikner, Comet Hunter Observatory2, New Ringgold, 0.305-m Hyperboloid astro-camera + CCD); 24.92, 18.4, 0.19' (J. Ryske, Y71 Makroskooppi, Fregenal de la Sierra, Spain, 0.3-m Ritchey-Chretien + CCD; 0.2' tail in p.a. 92 deg); 18.53, 17.8, 0.2' (K. Yoshimoto, 0.203-m Ritchey-Chretien + CCD); 15.91, 18.5, 0.25' (J. Ryske, Y71 Makroskooppi, Fregenal de la Sierra, Spain, 0.3-m Ritchey-Chretien + CCD; 0.35' tail in p.a. 100 deg); 01.83, 18.0, 0.2' (J. Ryske, M00 Viestikallio, Artjarvi, Finland, 0.5-m Prime focus of a reflector + CCD; 0.2' tail in p.a. 89 deg);

P/2019 Y3 (Catalina)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
apr 02.93, 16.7, 1' (T. Lehmann, Weimar, 0.279-m Newtonian + CCD; 1.3' tail in p.a. 146 deg);

P/2023 S1
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
apr 29.84, 16.9, 1.3' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 28.84, 16.8, 2' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 27.88, 17.4, 0.29' (S. Shurpakov, 0.41-m Newtonian + CCD); 26.87, 16.0, 1' (T. Csorgei, 0.28-m Schmidt-Cassegrain + CCD); 26.87, 16.5, 1.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 24.53, 16.1, 0.7' (A. Pearce, Perth Observatory, 0.35-m Schmidt-Cassegrain + CCD); 22.90, 17.5, 0.4' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD); 22.84, 16.0, 2.3' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 19.86, 16.5, 1.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 19.85, 15.6, 1.2' (T. Csorgei, 0.28-m Schmidt-Cassegrain + CCD); 18.87, 16.0, -- (G. van Buitenen, Dordrecht, NL (G06), 0.203-m Ritchey-Chretien + CCD); 16.85, 16.4, 1.7' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 12.82, 17.0, 1' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 05.48, 15.9, 0.6' (A. Pearce, Perth Observatory, 0.35-m Schmidt-Cassegrain + CCD); 04.92, 16.8, 0.5' (T. Csorgei, 0.28-m Schmidt-Cassegrain + CCD); 04.89, 16.0, 0.38' (N. Quinn, 0.28-m Schmidt-Cassegrain + CCD); 04.82, 16.7, 1' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 03.86, 14.8, 3' (S. Fritsche, Koeditz, 0.279-m Newtonian + CCD; 1.8' tail in p.a. 299 deg); 03.84, 15.7, 1.1' (M. Lošťák, 0.2-m Newtonian + CCD); 03.84, 16.4, 0.9' (T. Csorgei, 0.28-m Schmidt-Cassegrain + CCD); 03.84, 16.6, 1.1' (M. Lošťák, 0.2-m Newtonian + CCD); 03.82, 16.5, 1.3' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 02.89, 16.8, 1' (J. Koukal, Valasske Mezirici, 0.5-m Newtonian + CCD); 02.83, 14.9, 2.8' (T. Lehmann, Weimar, 0.279-m Newtonian + CCD; 0.06° tail in p.a. 304 deg); 01.87, 16.2, 0.38' (N. Quinn, 0.28-m Schmidt-Cassegrain + CCD); 01.02, 16.4, 0.56' (K. Hills, 0.5-m Newtonian + CCD);

P/2025 A2 (PANSTARRS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
apr 02.05, 20.6, -- (J. Maikner, Comet Hunter Observatory2, New Ringgold, 0.305-m Hyperboloid astro-camera + CCD);

P/2025 C1 (ATLAS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2025
apr 27.96, 18.9, 0.19' (S. Shurpakov, 0.41-m Newtonian + CCD); 17.83, 18.5, 0.2' (J. Xiong, Daocheng, China(remote,O40), 0.203-m Newtonian + CCD); 05.15, 18.2, 0.38' (K. Hills, 0.5-m Newtonian + CCD); 04.11, 17.7, 0.8' (S. Fritsche, Koeditz, 0.279-m Newtonian + CCD);