Recent Comet Brightness Estimates

10P/Tempel 2
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
mar 01.09, 19.7, -- (J. Maikner, Comet Hunter Observatory 2, 0.305-m Hyperboloid astro-camera + CCD);

12P/Pons-Brooks
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
mar 01.82, 6.0, 10.1' (D. Buczynski, Tarbatness MPC Code I81, 0.35-m Schmidt-Cassegrain + CCD);
    01.46, 6.5, 8' (J. Pile, San Rafael, Bulacan, Philippines, 0.05-m Monocular 1x);
    01.13, 6.0, 8' (C. Hergenrother, 10x50 Binoculars);
feb 29.87, 6.1, 11.3' (D. Buczynski, Tarbatness MPC Code I81, 0.35-m Schmidt-Cassegrain + CCD);
    29.83, 6.1, 10' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    29.82, 6.9, 4.01' (J. Czyz, Erding / Germany, 25x100 Binoculars);
    29.80, 6.7, -- (A. Russo, Gibraltar, 15x50 Binoculars);
    29.78, 5.9, 9' (M. Meyer, 10x50 Binoculars);
    29.08, 5.9, 5.5' (D. Zubenel, Pottawatomie State Lake # 1, Pottawatomie County, Kansas., 0.108-m Newtonian; 7' tail);
    28.81, 6.0, 7.6' (J. Chambó Bris, Benali, Valencia, Spain, 20x60 Binoculars);
    28.81, 6.6, 5' (C. Labordena, Benlloch, 11x80 Binoculars; 8' tail in p.a. 19 deg);
    28.81, 6.8, -- (A. Russo, Gibraltar, 15x50 Binoculars);
    28.80, 7.2, 8' (J. Navarro Pina, Mirador Cabezo Blanco ( Murcia , Spain ), 20x80 Binoculars);
    28.78, 6.4, -- (N. Novikov, Russia, d. Enaberdino, 0.253-m Newtonian);
    28.41, 6.9, 5.6' (O. Miyazaki, 20x80 Binoculars; 24' tail in p.a. 25 deg);
    27.83, 6.7, 10.5' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    27.81, 6.9, -- (A. Russo, Gibraltar, 15x50 Binoculars);
    27.43, 7.0, 3.5' (O. Miyazaki, 20x80 Binoculars);
    26.83, 6.9, 10.7' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    26.82, 6.7, 10.72' (N. James, 0.072-m Refractor + CCD);
    26.82, 7.1, 5.6' (M. Collins, Everton, 0.254-m Schmidt-Cassegrain; 9.4' tail in p.a. 18 deg);
    26.80, 7.0, -- (A. Russo, Gibraltar, 15x50 Binoculars);
    26.75, 6.5, 8' (P. Guzik, 10x42.0 Binoculars);
    26.45, 6.8, 3.2' (K. Yoshimoto, 0.203-m Ritchey-Chretien + CCD);
    26.44, 7.2, 7.3' (K. Yoshimoto, 0.203-m Ritchey-Chretien + CCD);
    26.44, 6.6, 7.3' (K. Yoshimoto, 0.203-m Ritchey-Chretien + CCD; 50' tail in p.a. 8 deg);
    26.42, 6.7, 7' (K. Yoshimoto, 20x100 Binoculars; 20' tail in p.a. 10 deg);
    25.80, 6.0, 13.3' (J. Czyz, Erding / Germany, 25x100 Binoculars; 22.46' tail in p.a. 342 deg);
    25.80, 6.5, 5.4' (V. Kasten, 20x80 Binoculars);
    25.78, 6.3, 10' (V. Kasten, 15x50 Binoculars);
    25.78, 6.7, 9' (D. Buczynski, Tarbatness MPC Code I81, 0.35-m Schmidt-Cassegrain + CCD);
    25.76, 6.0, 8' (U. Pilz, 7x50 Binoculars);
    25.74, 6.8, 6' (E. Banach, 0.25-m Newtonian);
    25.65, 7.0, 5' (N. Novikov, Russia, d. Enaberdino, 0.254-m Newtonian; 3' tail);
    24.80, 7.1, 6' (C. Labordena, Benlloch, 11x80 Binoculars);
    24.78, 6.7, 10.4' (D. Buczynski, Tarbatness MPC Code I81, 0.35-m Schmidt-Cassegrain + CCD);
    24.75, 6.4, 16' (S. Fritsche, Koeditz, 0.1-m Refractor + CCD; 0.38° tail in p.a. 356 deg);
    23.80, 7.0, 6' (V. Díaz, Elche ciudad, 20x80 Binoculars);
    23.79, 7.0, 9.8' (D. Buczynski, Tarbatness MPC Code I81, 0.35-m Schmidt-Cassegrain + CCD);
    23.78, 6.8, 6' (M. Deconinck, Artignosc-sur-Verdon, Provence, France, 25x126.0 Binoculars; 5' tail in p.a. 10 deg);
    22.79, 6.9, 10.7' (D. Buczynski, Tarbatness MPC Code I81, 0.35-m Schmidt-Cassegrain + CCD);
    22.16, 6.9, 6' (P. Guzik, 10x42.0 Binoculars);
    21.83, 7.1, 10.7' (D. Buczynski, Tarbatness MPC Code I81, 0.35-m Schmidt-Cassegrain + CCD);
    20.80, 7.4, 7.5' (D. Heggie, ASERO, Trevinca, Spain, 0.303-m Newtonian + CCD; 28' tail in p.a. 13 deg);
    19.82, 7.4, 8' (V. Gonano, Udine, Italy, 10x50 Binoculars; 8.3' tail in p.a. 5 deg);
    19.80, 7.4, 7.5' (D. Heggie, ASERO, Trevinca, Spain, 0.303-m Newtonian + CCD; 29' tail in p.a. 12 deg);
    19.12, 6.9, 9' (K. Yoshimoto, 0.431-m Newtonian + CCD);
    19.12, 6.8, 12.5' (K. Yoshimoto, 0.431-m Newtonian + CCD; 17' tail in p.a. 8 deg);
    19.06, 7.3, 3.1' (D. Zubenel, De Soto, Kansas., 0.152-m Newtonian);
    18.84, 7.3, 9' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    18.82, 7.4, 5.6' (M. Collins, Everton, 0.254-m Schmidt-Cassegrain; 7.3' tail in p.a. 16 deg);
    18.79, 7.4, 9.8' (D. Buczynski, Tarbatness MPC Code I81, 0.35-m Schmidt-Cassegrain + CCD);
    17.92, 7.3, 5' (B. Granslo, Hakadal, 0.08-m Refractor);
    17.83, 7.4, 9.8' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    17.80, 7.1, 5.9' (V. Kasten, 20x80 Binoculars);
    17.78, 7.1, 5' (C. Harder, Jeersdorf f, 0.298-m Newtonian);
    17.69, 12.3, -- (T. Csorgei, Blahová, 0.275-m Schmidt-Cassegrain + CCD);
    17.43, 7.0, 6' (K. Yoshimoto, 20x100 Binoculars);
    16.82, 7.8, 4.5' (M. Collins, Everton, 0.254-m Schmidt-Cassegrain; 9.4' tail);
    16.78, 8.0, 3' (M. Filipek, 0.25-m Newtonian);
    16.75, 8.1, 3' (M. Kwinta, 0.3-m Newtonian);
    16.73, 7.1, 6' (P. Guzik, 10x42.0 Binoculars);
    16.70, 11.9, -- (T. Csorgei, Blahová, 0.275-m Schmidt-Cassegrain + CCD);
    16.68, 7.8, 5.2' (J. Powichrowski, Knyszyn, 0.35-m Newtonian);
    16.40, 8.2, 3.1' (O. Miyazaki, 0.32-m Newtonian);
    15.82, +11.0, 4.9' (P. Pochroń, Małopolska, 0.254-m Newtonian + CCD; 6.8' tail in p.a. 78 deg);
    15.79, 7.1, 16' (S. Fritsche, Koeditz, 0.1-m Refractor + CCD; 0.38° tail in p.a. 344 deg);
    15.74, 7.2, 5' (P. Guzik, 25x100 Binoculars);
    15.71, 11.2, -- (T. Csorgei, Blahová, 0.275-m Schmidt-Cassegrain + CCD);
    14.73, 7.0, 6' (P. Guzik, 10x42.0 Binoculars);
    13.85, 7.9, 3.6' (K. Harikae, 0.15-m Newtonian + CCD);
    13.84, 7.1, 10.7' (M. Mašek, 0.25-m Schmidt-Cassegrain + CCD; 12.4' tail);
    13.84, 8.1, 7.5' (M. Mašek, 0.25-m Schmidt-Cassegrain + CCD; 12.2' tail in p.a. 360 deg);
    13.83, 7.9, 2.31' (J. Czyz, Erding / Germany, 25x100 Binoculars; 5.58' tail in p.a. 23 deg);
    13.82, 6.9, 6' (J. Gonzalez Suarez, 10x50 Binoculars);
    13.79, 7.2, 7.1' (J. Chambó Bris, Valles, Valencia, Spain, 0.2-m Newtonian + CCD; 45' tail in p.a. 358 deg);
    13.79, 7.7, 10.1' (D. Buczynski, Tarbatness MPC Code I81, 0.35-m Schmidt-Cassegrain + CCD);
    13.75, 7.2, 21' (S. Fritsche, Koeditz, 0.1-m Refractor + CCD; 0.39° tail in p.a. 349 deg);
    13.75, 7.3, 5' (U. Pilz, 16x70 Binoculars);
    13.74, 7.5, 6.5' (V. Gonano, Udine, Italy, 10x50 Binoculars);
    13.73, 7.7, 10' (H. Kiiskinen, 0.4-m Ritchey-Chretien + CCD);
    13.40, 7.9, 3' (O. Miyazaki, 0.32-m Newtonian);
    13.21, 7.0, 14' (S. Fritsche, Koeditz, 0.1-m Refractor + CCD; 0.18° tail in p.a. 348 deg);
    12.82, 8.0, 4.5' (M. Collins, Everton, 0.254-m Schmidt-Cassegrain);
    12.80, 7.4, 6' (C. Labordena, La Serra d Engarcera, 11x80 Binoculars);
    12.79, 7.0, 17' (T. Lehmann, Nerpio (remote), 0.25-m Newtonian + CCD; 0.83° tail in p.a. 338 deg);
    12.78, 6.9, 5' (P. De Schrijver, Beert, 25x100 Binoculars);
    12.78, 7.4, 4.4' (V. Kasten, 20x80 Binoculars);
    12.78, 9.1, 12.8' (P. Dekelver, 0.3-m Newtonian + CCD; 13.5' tail in p.a. 4 deg);
    12.77, 7.2, 5' (A. Scholten, Eerbeek, 0.2-m Newtonian);
    12.77, 7.1, 9' (M. Meyer, 0.152-m Refractor);
    12.71, 7.6, 9.5' (H. Kiiskinen, 0.4-m Ritchey-Chretien + CCD);
    12.43, 7.0, 7.6' (K. Yoshimoto, 0.077-m Refractor + CCD; 1.2° tail in p.a. 7 deg);
    12.41, 8.1, 3.3' (O. Miyazaki, 0.32-m Newtonian);
    12.39, 8.0, 4' (S. Yoshida, 0.4-m Newtonian);
    10.85, 8.0, 3.4' (K. Harikae, 0.15-m Newtonian + CCD);
    10.77, 7.5, 5.7' (V. Kasten, 20x80 Binoculars);
    10.43, 7.4, 7.1' (K. Yoshimoto, 0.077-m Refractor + CCD; 40' tail in p.a. 355 deg);
    09.85, 8.3, 3' (K. Harikae, 0.15-m Newtonian + CCD);
    08.40, 8.3, 4.3' (O. Miyazaki, 0.32-m Newtonian);
    07.77, 7.9, 9.6' (D. Buczynski, Tarbatness MPC Code I81, 0.35-m Schmidt-Cassegrain + CCD);
    07.77, 7.3, 13.5' (D. Buczynski, Tarbatness MPC Code I81, 0.3-m Newtonian + CCD);
    07.40, 8.6, 3.1' (O. Miyazaki, 0.32-m Newtonian);
    06.81, 8.0, 3.2' (J. Czyz, Erding / Germany, 25x100 Binoculars);
    06.79, 8.0, 9' (D. Heggie, ASERO, Trevinca, Spain, 0.303-m Newtonian + CCD; 29' tail in p.a. 5 deg);
    06.78, 7.0, 11' (D. Buczynski, Tarbatness MPC Code I81, 0.35-m Schmidt-Cassegrain + CCD);
    06.75, 7.4, 10' (G. Scheerle, 9x63.0 Binoculars);
    06.74, 7.5, 6' (A. Novichonok, Shapshezero, light green LP zone (Lorenz, 2022), 10x50 Binoculars);
    05.85, 7.5, 4' (B. Granslo, Hakadal, 0.08-m Refractor);
    05.85, 7.8, 4.2' (J. Czyz, Observatory, Königsdorf, Germany, 25x100 Binoculars);
    05.82, 7.3, 16' (S. Fritsche, Koeditz, 0.1-m Refractor + CCD);
    05.75, 7.4, 7' (G. Scheerle, 0.235-m Schmidt-Cassegrain; 0.16° tail in p.a. 20 deg);
    05.75, 7.4, 6' (G. Scheerle, 9x63.0 Binoculars);
    05.75, 7.7, 5' (M. Meyer, 0.152-m Refractor);
    05.09, 7.7, 3' (C. Hergenrother, 10x50 Binoculars);
    04.79, 8.2, -- (V. Díaz, La Romana, Alicante, Spain, 16x50 Binoculars);
    04.79, 7.9, 9.1' (D. Heggie, ASERO, Trevinca, Spain, 0.303-m Newtonian + CCD; 10' tail in p.a. 9 deg);
    04.78, 8.4, 4.5' (V. Díaz, La Romana, Alicante, Spain, 0.2-m Newtonian);
    04.76, 7.8, 5' (G. Pappa, Pedara,Sicily,Italy, 12x50 Binoculars);
    04.73, 8.2, 5' (G. Pappa, Pedara,Sicily,Italy, 0.3-m Camera lens + CCD);
    04.73, 7.7, 6' (T. Karhula, Virsbo, Sweden, 10x50 Binoculars);
    04.72, 7.7, 6' (V. Gonano, Udine, Italy, 10x50 Binoculars);
    04.40, 8.0, 3.6' (O. Miyazaki, 0.32-m Newtonian);
    03.82, 7.9, 10.3' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    03.82, 8.0, 10' (D. Buczynski, Tarbatness MPC Code I81, 0.35-m Schmidt-Cassegrain + CCD);
    03.79, 7.3, 21' (T. Lehmann, Nerpio (remote), 0.25-m Newtonian + CCD; 0.88° tail in p.a. 342 deg);
    03.78, 7.8, 11' (J. Chambó Bris, Valles, Valencia, Spain, 0.2-m Newtonian + CCD; 25' tail in p.a. 11 deg);
    03.75, 7.6, 5.5' (R. Haver, Frasso Sabino, Rieti, Italia, 20x100 Binoculars);
    03.73, 8.5, 4' (G. Pappa, Pedara,Sicily,Italy, 0.3-m Camera lens + CCD);
    03.40, 7.9, 3.5' (O. Miyazaki, 0.32-m Newtonian);
    02.82, 7.9, 11.1' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    02.79, 8.3, 6' (C. Labordena, La Serra d Engarcera, 0.2-m Schmidt-Cassegrain);
    02.75, 7.8, 7' (G. Scheerle, 0.235-m Schmidt-Cassegrain);
    02.41, 8.0, 7.8' (K. Yoshimoto, 0.077-m Refractor + CCD; 10' tail in p.a. 5 deg);
    02.40, 8.4, 6.6' (O. Miyazaki, 0.32-m Newtonian);
    01.79, 7.5, 17' (T. Lehmann, Nerpio (remote), 0.25-m Newtonian + CCD; 0.8° tail in p.a. 342 deg);
    01.79, 8.2, 6.4' (D. Heggie, ASERO, Trevinca, Spain, 0.303-m Newtonian + CCD; 13' tail in p.a. 8 deg);
    01.78, 9.0, 9.2' (P. Dekelver, 0.3-m Newtonian + CCD; 13.5' tail in p.a. 8 deg);
    01.76, 7.9, 6' (C. Harder, Region Bult, 0.298-m Newtonian);
    01.75, 8.0, 4.3' (V. Kasten, 20x80 Binoculars);
    01.74, 8.0, 6' (M. Meyer, 0.152-m Refractor);
    01.74, 7.7, 19' (S. Fritsche, Koeditz, 0.1-m Refractor + CCD; 0.13° tail in p.a. 340 deg);
    01.70, 8.6, 5.3' (J. Powichrowski, Knyszyn, 0.35-m Newtonian);
    01.40, 8.2, 3.2' (O. Miyazaki, 0.32-m Newtonian);

13P/Olbers
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
feb 28.43, 12.9, 1.2' (O. Miyazaki, 0.32-m Newtonian);
    20.52, 14.0, 0.8' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD);
    16.77, 15.1, -- (T. Csorgei, Blahová, 0.275-m Schmidt-Cassegrain + CCD);
    13.78, 12.4, 4.4' (S. Fritsche, Koeditz, 0.1-m Refractor + CCD);
    13.46, 12.8, 2' (M. Mattiazzo, Swan Hill, Victoria, Australia, 0.07-m Camera lens + CCD);
    13.45, 13.0, 1.3' (C. Wyatt, 0.4-m Newtonian);
    12.77, 12.9, -- (G. van Buitenen, Dordrecht, NL (G06), 0.203-m Ritchey-Chretien + CCD);
    12.74, 14.3, 0.4' (S. Szabo, Agfalva, 0.6-m Newtonian);
    12.55, 13.8, 1.2' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD);
    12.46, 12.4, 3.2' (K. Yoshimoto, 0.077-m Refractor + CCD);
    12.42, [13.0, 0.5' (S. Yoshida, 0.4-m Newtonian);
    11.53, 13.7, 1.3' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD);
    08.48, 13.0, 2' (M. Mattiazzo, Swan Hill, Victoria, Australia, 0.07-m Camera lens + CCD);
    07.85, 13.1, 2.63' (K. Hills, 0.5-m Newtonian + CCD);
    05.77, 12.8, 1.6' (G. Scheerle, 0.235-m Schmidt-Cassegrain);
    04.84, 11.9, 10' (T. Lehmann, Nerpio (remote), 0.25-m Newtonian + CCD);
    04.81, 14.3, 2' (J. Chambó Bris, Valles, Valencia, Spain, 0.2-m Newtonian + CCD);
    04.75, 9.8, 8' (G. Pappa, Pedara,Sicily,Italy, 0.3-m Camera lens + CCD);
    04.74, 13.8, 0.4' (G. Pappa, Pedara,Sicily,Italy, 0.3-m Camera lens + CCD);
    03.74, 13.9, 0.5' (G. Pappa, Pedara,Sicily,Italy, 0.3-m Camera lens + CCD);
    02.59, 14.3, 1.2' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD);
    02.46, 13.3, 2.4' (K. Yoshimoto, 0.077-m Refractor + CCD);
    02.43, 13.7, 1.3' (C. Wyatt, 0.4-m Newtonian);
    01.87, 13.1, 1.9' (M. Mašek, 0.25-m Schmidt-Cassegrain + CCD; 1' tail in p.a. 74 deg);
    01.58, 14.4, 1.2' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD);
    01.44, 13.9, 1' (C. Wyatt, 0.4-m Newtonian);

26P/Grigg-Skjellerup
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
feb 18.44, 17.1, -- (J. Maikner, Comet Hunter Observatory 2, 0.305-m Hyperboloid astro-camera + CCD);

29P/Schwassmann-Wachmann
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
feb 27.86, 12.4, 1.8' (W. Kutschera, 0.508-m Newtonian);
    27.86, 12.0, 5.5' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    27.82, 12.5, 3.1' (D. Heggie, Edinburgh, UK, 0.05-m Refractor + CCD);
    26.93, 12.7, 2.44' (N. Quinn, 0.28-m Schmidt-Cassegrain + CCD);
    26.87, 12.9, 3' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    20.81, 12.9, 2.9' (D. Heggie, Edinburgh, UK, 0.05-m Refractor + CCD);
    18.89, 12.7, 2.44' (N. Quinn, 0.28-m Schmidt-Cassegrain + CCD);
    18.86, 12.3, 4.3' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    18.12, 13.7, 2' (R. Ang, 0.114-m Newtonian + CCD);
    17.86, 12.1, 4.9' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    16.83, 11.4, 6.2' (D. Heggie, ASERO, Trevinca, Spain, 0.303-m Newtonian + CCD);
    16.51, 13.5, 1.5' (M. Mattiazzo, Swan Hill, Victoria, Australia, 0.28-m Schmidt reflector + CCD);
    15.99, 13.0, 2.82' (K. Hills, 0.5-m Newtonian + CCD);
    13.98, 11.5, 8.4' (S. Fritsche, Koeditz, 0.1-m Refractor + CCD);
    13.74, 12.8, 1.8' (H. Kiiskinen, 0.4-m Ritchey-Chretien + CCD);
    13.48, 14.7, 0.3' (C. Wyatt, 0.4-m Newtonian);
    13.04, 12.4, 4.7' (K. Hills, 0.5-m Newtonian + CCD);
    12.92, 14.2, 0.56' (N. Quinn, 0.28-m Schmidt-Cassegrain + CCD);
    12.83, 11.3, 5.5' (P. Dekelver, 0.3-m Newtonian + CCD);
    12.78, 15.0, -- (S. Szabo, Agfalva, 0.6-m Newtonian);
    11.92, 13.4, 1.5' (N. Quinn, 0.28-m Schmidt-Cassegrain + CCD);
    11.88, 12.1, 4.6' (D. Heggie, Edinburgh, UK, 0.05-m Refractor + CCD);
    07.88, 12.7, 2.6' (D. Heggie, Edinburgh, UK, 0.05-m Refractor + CCD);
    07.04, 12.3, 4.32' (K. Hills, 0.5-m Newtonian + CCD);
    06.90, 13.8, 1' (D. Heggie, Edinburgh, UK, 0.05-m Refractor + CCD);
    05.86, 11.4, 8.8' (S. Fritsche, Koeditz, 0.1-m Refractor + CCD);
    05.10, 13.5, 1.5' (R. Ang, 0.2-m Newtonian + CCD);
    05.08, 12.3, 4.14' (K. Hills, 0.5-m Newtonian + CCD);
    04.60, 13.4, 1.1' (O. Miyazaki, 0.32-m Newtonian);
    04.01, 11.5, 6.4' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    03.13, 12.1, 4.89' (K. Hills, 0.5-m Newtonian + CCD);
    02.95, 11.0, 8.1' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    02.90, 13.2, 0.5' (G. Pappa, Pedara,Sicily,Italy, 0.3-m Camera lens + CCD);
    02.88, 13.3, 1.9' (D. Heggie, Edinburgh, UK, 0.05-m Refractor + CCD);
    02.56, 13.0, 0.8' (O. Miyazaki, 0.32-m Newtonian);
    02.49, 12.4, 2' (C. Wyatt, 0.4-m Newtonian);
    02.12, 13.1, 2.1' (D. Heggie, ASERO, Trevinca, Spain, 0.303-m Newtonian + CCD);
    01.83, 11.1, 7.3' (P. Dekelver, 0.3-m Newtonian + CCD);
    01.80, 13.5, 0.6' (C. Harder, Region Bult, 0.298-m Newtonian);
    01.77, 11.4, 7.2' (S. Fritsche, Koeditz, 0.1-m Refractor + CCD);
    01.47, 12.0, 3' (C. Wyatt, 0.4-m Newtonian);

30P/Reinmuth
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
feb 07.88, 18.6, 0.38' (K. Hills, 0.5-m Newtonian + CCD);

32P/Comas Sola
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
feb 26.80, 15.4, 0.38' (N. Quinn, 0.28-m Schmidt-Cassegrain + CCD);
    18.82, 15.4, 0.38' (N. Quinn, 0.28-m Schmidt-Cassegrain + CCD);
    17.71, 16.2, -- (T. Csorgei, Blahová, 0.275-m Schmidt-Cassegrain + CCD);
    13.45, 13.8, 1' (C. Wyatt, 0.4-m Newtonian);
    12.81, 14.4, 1.13' (N. Quinn, 0.28-m Schmidt-Cassegrain + CCD);
    12.79, 14.4, -- (G. van Buitenen, Dordrecht, NL (G06), 0.203-m Ritchey-Chretien + CCD);
    12.75, 14.4, 0.6' (S. Szabo, Agfalva, 0.6-m Newtonian);
    08.82, 15.7, 0.33' (S. Shurpakov, 0.2-m Schmidt-Newtonian; 1.1' tail in p.a. 72 deg);
    07.94, 16.3, 0.38' (K. Hills, 0.5-m Newtonian + CCD);
    05.06, 14.1, 0.5' (R. Ang, 0.2-m Newtonian + CCD);
    03.83, 14.6, 1.5' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    01.88, 13.3, 3.7' (P. Dekelver, 0.3-m Newtonian + CCD; 0.5' tail in p.a. 69 deg);
    01.82, 14.4, 2.1' (T. Lehmann, Nerpio (remote), 0.25-m Newtonian + CCD; 0.05° tail in p.a. 80 deg);
    01.43, 14.5, 0.9' (C. Wyatt, 0.4-m Newtonian);

37P/Forbes
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
feb 05.34, 20.3, -- (J. Maikner, Comet Hunter Observatory 2, 0.305-m Hyperboloid astro-camera + CCD);

62P/Tsuchinshan
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
feb 21.21, 8.8, 19' (T. Lehmann, Nerpio (remote), 0.25-m Newtonian + CCD; 0.25° tail in p.a. 289 deg);
    20.67, 11.1, 3.2' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD);
    18.18, 9.6, 6' (G. Pappa, Pedara,Sicily,Italy, 0.3-m Camera lens + CCD);
    18.18, 9.4, 11.8' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    17.05, 8.8, 12' (M. Paradowski, 0.075-m Refractor + CCD; 15' tail in p.a. 293 deg);
    17.04, 8.8, 12' (M. Paradowski, 0.075-m Refractor + CCD; 15' tail in p.a. 293 deg);
    17.02, 9.0, 12' (M. Paradowski, 0.075-m Refractor + CCD; 15' tail in p.a. 293 deg);
    16.83, 15.2, -- (T. Csorgei, Blahová, 0.275-m Schmidt-Cassegrain + CCD);
    16.68, 10.8, 4.3' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD);
    16.12, 10.1, 4' (E. Banach, 0.25-m Newtonian);
    16.11, 8.8, 12' (P. Guzik, 10x42.0 Binoculars);
    16.08, 10.5, 3' (M. Kwinta, 0.3-m Newtonian);
    14.80, 10.4, 4.5' (O. Miyazaki, 0.32-m Newtonian);
    14.23, 8.9, 11.66' (K. Hills, 0.5-m Newtonian + CCD);
    13.81, 10.8, 5' (O. Miyazaki, 0.32-m Newtonian);
    13.76, 9.0, 10' (M. Mattiazzo, Swan Hill, Victoria, Australia, 25x100 Binoculars);
    13.76, 9.8, 4' (K. Harikae, 0.15-m Newtonian + CCD; 5.7' tail in p.a. 288 deg);
    13.53, 8.9, 12.5' (C. Wyatt, 15x70 Binoculars);
    13.18, 9.3, 7.5' (M. Meyer, 0.152-m Refractor);
    13.17, 9.8, 4' (W. Souza, 0.15-m Newtonian);
    13.09, 10.9, 5.5' (P. Dekelver, 0.3-m Newtonian + CCD; 13' tail in p.a. 295 deg);
    12.94, 9.4, 6' (A. Scholten, Eerbeek, 0.2-m Newtonian);
    12.81, 10.3, 4.5' (O. Miyazaki, 0.32-m Newtonian);
    12.79, 8.6, 28' (T. Lehmann, Australia (remote), 0.279-m Newtonian + CCD; 0.52° tail in p.a. 293 deg);
    11.99, 9.9, 4.1' (M. Collins, Everton, 0.254-m Schmidt-Cassegrain);
    11.16, 9.8, 4' (W. Souza, 0.15-m Newtonian);
    10.76, 9.9, 3.9' (K. Harikae, 0.15-m Newtonian + CCD; 6.5' tail in p.a. 290 deg);
    10.31, 9.4, 4' (M. Goiato, 0.22-m Newtonian);
    10.20, 9.7, 4' (M. Collins, Everton, 0.254-m Schmidt-Cassegrain);
    09.83, 10.6, 3.7' (O. Miyazaki, 0.32-m Newtonian);
    09.77, 10.0, 20' (P. Yi, Andong, 0.61-m Newtonian);
    09.77, 10.0, 3.7' (K. Harikae, 0.15-m Newtonian + CCD; 6.5' tail in p.a. 298 deg);
    08.75, 9.3, 7' (M. Mattiazzo, Swan Hill, Victoria, Australia, 25x100 Binoculars);
    07.78, 8.5, 13' (K. Yoshimoto, 0.203-m Ritchey-Chretien + CCD; 25' tail in p.a. 300 deg);
    06.82, 9.5, 4.6' (O. Miyazaki, 0.32-m Newtonian);
    04.62, 8.7, 4.3' (O. Miyazaki, 0.32-m Newtonian);
    04.25, 8.4, 12.97' (K. Hills, 0.5-m Newtonian + CCD);
    04.08, 8.1, 28' (T. Lehmann, Nerpio (remote), 0.25-m Newtonian + CCD; 0.68° tail in p.a. 292 deg);
    04.08, 8.7, 15.6' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector);
    04.02, 9.2, 8' (C. Harder, Jeersdorf f, 0.298-m Newtonian);
    03.04, 8.9, 12.4' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    03.00, , -- (G. Scheerle, 9x63.0 Binoculars);
    03.00, 8.8, 10' (G. Scheerle, 0.235-m Schmidt-Cassegrain);
    02.91, 9.8, 5' (G. Pappa, Pedara,Sicily,Italy, 0.3-m Camera lens + CCD);
    02.60, 9.5, 6' (O. Miyazaki, 0.32-m Newtonian);
    02.14, 9.9, 8.2' (D. Heggie, ASERO, Trevinca, Spain, 0.303-m Newtonian + CCD; 9' tail in p.a. 293 deg);
    01.95, 8.2, 9' (T. Karhula, Virsbo, Sweden, 10x50 Binoculars);

65P/Gunn
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
feb 15.24, 17.7, 0.38' (K. Hills, 0.5-m Newtonian + CCD);
    08.22, 17.9, 0.38' (K. Hills, 0.5-m Newtonian + CCD);
    04.10, 17.6, 0.4' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);

103P/Hartley
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
feb 27.88, 15.5, 1.1' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    20.57, 15.7, 0.4' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD);
    15.99, 14.5, 2.26' (K. Hills, 0.5-m Newtonian + CCD);
    14.56, 15.9, 0.5' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD);
    13.63, 15.9, 0.5' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD);
    13.50, 15.1, 0.3' (C. Wyatt, 0.4-m Newtonian);
    13.02, 15.2, 0.7' (P. Dekelver, 0.3-m Newtonian + CCD);
    12.61, 15.7, 0.5' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD);
    11.58, 15.8, 0.5' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD);
    08.01, 14.3, 2.26' (K. Hills, 0.5-m Newtonian + CCD);
    02.97, 13.4, 3' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    02.97, 12.2, 2' (G. Scheerle, 0.235-m Schmidt-Cassegrain);
    02.46, 14.7, 0.6' (C. Wyatt, 0.4-m Newtonian);
    01.46, 14.5, 0.4' (C. Wyatt, 0.4-m Newtonian);

117P/Helin-Roman-Alu
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
feb 01.85, 18.0, 0.38' (K. Hills, 0.5-m Newtonian + CCD);

121P/Shoemaker-Holt
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
feb 20.03, 19.8, -- (J. Maikner, Comet Hunter Observatory 2, 0.305-m Hyperboloid astro-camera + CCD);

144P/Kushida
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
feb 29.79, 9.8, 5' (M. Meyer, 0.152-m Refractor);
    28.77, 9.4, -- (U. Pilz, 16x70 Binoculars);
    28.44, 11.0, 1.8' (O. Miyazaki, 0.32-m Newtonian);
    27.45, 10.9, 2.7' (O. Miyazaki, 0.32-m Newtonian);
    26.85, 9.4, 13.1' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    26.84, 10.1, 2.8' (M. Collins, Everton, 0.254-m Schmidt-Cassegrain);
    18.84, 10.7, 2.63' (N. Quinn, 0.28-m Schmidt-Cassegrain + CCD);
    17.72, 14.7, -- (T. Csorgei, Blahová, 0.275-m Schmidt-Cassegrain + CCD);
    16.73, 15.1, -- (T. Csorgei, Blahová, 0.275-m Schmidt-Cassegrain + CCD);
    16.41, 10.5, 3.3' (O. Miyazaki, 0.32-m Newtonian);
    15.83, 9.2, 14' (S. Fritsche, Koeditz, 0.1-m Refractor + CCD);
    15.74, 15.1, -- (T. Csorgei, Blahová, 0.275-m Schmidt-Cassegrain + CCD);
    15.53, 10.5, 5.3' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD);
    14.74, 9.7, 6' (P. Guzik, 25x100 Binoculars);
    14.52, 10.6, 4.3' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD);
    13.95, 10.8, 2' (J. de Souza Aguiar, 0.3-m Newtonian);
    13.83, 9.1, 17' (S. Fritsche, Koeditz, 0.1-m Refractor + CCD);
    13.77, 10.1, 3' (U. Pilz, 0.12-m Refractor);
    13.76, 10.2, 5' (H. Kiiskinen, 0.4-m Ritchey-Chretien + CCD);
    13.56, 11.0, 4' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD; 5' tail in p.a. 82 deg);
    13.47, 8.9, 12' (C. Wyatt, 15x70 Binoculars);
    13.47, 9.8, 6' (M. Mattiazzo, Swan Hill, Victoria, Australia, 0.07-m Camera lens + CCD);
    13.41, 10.2, 2.4' (O. Miyazaki, 0.32-m Newtonian);
    12.88, 9.0, 5.5' (C. Harder, Jeersdorf f, 0.298-m Newtonian);
    12.83, 10.1, 2.9' (M. Collins, Everton, 0.254-m Schmidt-Cassegrain);
    12.83, 9.6, 5.45' (N. Quinn, 0.28-m Schmidt-Cassegrain + CCD);
    12.82, 9.9, -- (G. van Buitenen, Dordrecht, NL (G06), 0.203-m Ritchey-Chretien + CCD);
    12.81, 10.9, 6.6' (P. Dekelver, 0.3-m Newtonian + CCD);
    12.78, 9.6, 6' (A. Scholten, Eerbeek, 0.2-m Newtonian);
    12.78, 8.9, 7' (M. Meyer, 0.152-m Refractor);
    12.75, 9.7, 5.2' (S. Szabo, Agfalva, 0.6-m Newtonian);
    12.55, 11.3, 4.3' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD);
    12.51, 9.9, 4.7' (Y. Yamaguchi, 0.076-m Refractor + CCD);
    12.42, 10.1, 2.9' (O. Miyazaki, 0.32-m Newtonian);
    12.40, 10.5, 2.5' (S. Yoshida, 0.4-m Newtonian);
    11.98, 10.1, 3' (M. Goiato, 0.22-m Newtonian);
    11.90, 9.6, 4.4' (M. Collins, Everton, 0.254-m Schmidt-Cassegrain);
    11.86, 10.2, 3.95' (N. Quinn, 0.28-m Schmidt-Cassegrain + CCD);
    11.54, 11.0, 3.2' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD);
    09.55, 10.1, 3.6' (O. Miyazaki, 0.32-m Newtonian);
    09.42, 9.6, 5' (K. Yoshimoto, 20x100 Binoculars);
    08.86, 12.8, 1.67' (S. Shurpakov, 0.2-m Schmidt-Newtonian);
    08.49, 10.1, 5' (M. Mattiazzo, Swan Hil, Victoria, Australia, 0.07-m Camera lens + CCD);
    08.41, 10.5, 2.3' (O. Miyazaki, 0.32-m Newtonian);
    07.89, 9.8, 6.02' (K. Hills, 0.5-m Newtonian + CCD);
    07.41, 10.7, 3.9' (O. Miyazaki, 0.32-m Newtonian);
    05.78, 10.2, 5.5' (G. Scheerle, 0.235-m Schmidt-Cassegrain);
    05.76, 9.5, 7' (M. Meyer, 0.152-m Refractor);
    05.04, 10.0, 5' (R. Ang, 0.2-m Newtonian + CCD);
    04.88, 10.5, 2.8' (M. Collins, Everton, 0.254-m Schmidt-Cassegrain);
    04.84, 9.7, 4.7' (V. Díaz, La Romana, Alicante, Spain, 0.2-m Newtonian);
    04.57, 9.2, 21' (T. Lehmann, Australia (remote), 0.279-m Newtonian + CCD);
    04.41, 10.1, 4.4' (O. Miyazaki, 0.32-m Newtonian);
    04.12, 10.1, 4' (R. Ang, 0.114-m Newtonian + CCD);
    03.97, 9.5, 5' (C. Harder, Jeersdorf f, 0.298-m Newtonian);
    03.83, 9.4, 11.8' (J. Chambó Bris, Valles, Valencia, Spain, 0.2-m Newtonian + CCD; 14' tail in p.a. 75 deg);
    03.76, 9.7, 4' (R. Haver, Frasso Sabino, Rieti, Italia, 20x100 Binoculars);
    03.75, 10.0, 7' (G. Pappa, Pedara,Sicily,Italy, 0.3-m Camera lens + CCD);
    03.41, 9.6, 4.1' (O. Miyazaki, 0.32-m Newtonian);
    02.92, 10.6, 3.5' (M. Collins, Everton, 0.254-m Schmidt-Cassegrain);
    02.88, 10.2, 4' (G. Pappa, Pedara,Sicily,Italy, 0.3-m Camera lens + CCD);
    02.85, 9.4, 11.1' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    02.82, 9.7, 4' (C. Labordena, La Serra d Engarcera, 0.2-m Schmidt-Cassegrain);
    02.80, 10.8, 2.5' (G. Scheerle, 0.235-m Schmidt-Cassegrain);
    02.44, 9.2, 6.5' (C. Wyatt, 0.05-m Refractor);
    02.41, 10.3, 3.6' (O. Miyazaki, 0.32-m Newtonian);
    01.94, 9.9, 3.5' (T. Karhula, Virsbo, Sweden, 25x100 Binoculars);
    01.91, 10.0, 3.4' (M. Collins, Everton, 0.254-m Schmidt-Cassegrain);
    01.80, 11.1, 5.5' (P. Dekelver, 0.3-m Newtonian + CCD);
    01.77, 8.8, 7' (C. Harder, Region Bult, 0.298-m Newtonian);
    01.73, 9.9, 5.5' (M. Meyer, 0.254-m Newtonian);
    01.72, 10.2, 5.4' (J. Powichrowski, Knyszyn, 0.35-m Newtonian);
    01.44, 9.4, 9.9' (C. Wyatt, 0.4-m Newtonian);
    01.41, 10.0, 3.5' (O. Miyazaki, 0.32-m Newtonian);

150P/LONEOS
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
feb 15.96, 16.8, 0.8' (S. Fritsche, Koeditz, 0.1-m Refractor + CCD);
    08.05, 16.4, 0.38' (K. Hills, 0.5-m Newtonian + CCD);
    02.99, 16.4, 0.4' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);

170P/Christensen
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
feb 07.86, 18.0, 0.38' (K. Hills, 0.5-m Newtonian + CCD);

207P/NEAT
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
feb 20.53, 15.1, 0.9' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD);
    16.50, 14.0, 2' (M. Mattiazzo, Swan Hill, Victoria, Australia, 0.28-m Schmidt reflector + CCD);
    15.54, 14.9, 0.6' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD);
    14.54, 14.7, 0.8' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD);
    13.84, 14.6, 0.94' (K. Hills, 0.5-m Newtonian + CCD);
    13.53, 14.4, 1.1' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD);
    13.46, 14.6, 0.7' (C. Wyatt, 0.4-m Newtonian);
    12.73, 13.7, 0.5' (S. Szabo, Agfalva, 0.6-m Newtonian);
    12.54, 14.9, 0.8' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD);
    06.88, 14.4, 1.32' (K. Hills, 0.5-m Newtonian + CCD);
    04.74, 14.1, 0.5' (G. Pappa, Pedara,Sicily,Italy, 0.3-m Camera lens + CCD);
    02.44, 14.3, 0.7' (C. Wyatt, 0.4-m Newtonian);
    01.80, 13.2, 5.6' (T. Lehmann, Nerpio (remote), 0.25-m Newtonian + CCD);
    01.57, 14.6, 0.8' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD);

216P/LINEAR
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
feb 20.24, 18.4, -- (J. Maikner, Comet Hunter Observatory 2, 0.305-m Hyperboloid astro-camera + CCD);
    14.16, 19.4, 0.38' (K. Hills, 0.5-m Newtonian + CCD);
    07.76, 18.9, 0.2' (K. Yoshimoto, 0.203-m Ritchey-Chretien + CCD);
    04.05, 19.2, 0.4' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    03.01, 19.2, 0.4' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);

227P/Catalina-LINEAR
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
feb 16.00, 15.0, 2.1' (S. Fritsche, Koeditz, 0.1-m Refractor + CCD);
    13.92, 15.3, 1.1' (S. Fritsche, Koeditz, 0.1-m Refractor + CCD);
    12.96, 15.1, 0.7' (P. Dekelver, 0.3-m Newtonian + CCD);
    12.76, 14.5, 0.25' (S. Szabo, Agfalva, 0.6-m Newtonian);
    07.97, 15.7, 0.38' (K. Hills, 0.5-m Newtonian + CCD);
    02.91, 15.0, 0.4' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);

234P/LINEAR
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
feb 05.09, 20.8, -- (J. Maikner, Comet Hunter Observatory 2, 0.305-m Hyperboloid astro-camera + CCD);

244P/Scotti
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
feb 14.06, 18.9, 0.38' (K. Hills, 0.5-m Newtonian + CCD);

471P
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
feb 01.86, 17.9, 0.38' (K. Hills, 0.5-m Newtonian + CCD);

475P/Spacewatch-LINEAR
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
feb 20.18, 18.6, -- (J. Maikner, Comet Hunter Observatory 2, 0.305-m Hyperboloid astro-camera + CCD);

479P/Elenin
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
feb 16.53, 14.4, 2' (M. Mattiazzo, Swan Hill, Victoria, Australia, 0.28-m Schmidt reflector + CCD);
    15.92, 13.3, 4.4' (S. Fritsche, Koeditz, 0.1-m Refractor + CCD);
    13.95, 14.4, 1.8' (S. Fritsche, Koeditz, 0.1-m Refractor + CCD);

C/2014 UN271 (Bernardinelli-Bernstein)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
feb 16.49, 15.9, 0.7' (M. Mattiazzo, Swan Hill, Victoria, Australia, 0.28-m Schmidt reflector + CCD);
    08.55, 15.8, 1.8' (T. Lehmann, Australia (remote), 0.279-m Newtonian + CCD);

C/2017 K2 (PANSTARRS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
feb 28.48, 12.7, 0.8' (O. Miyazaki, 0.32-m Newtonian);
    27.90, 13.8, 1.1' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    18.85, 13.4, 0.94' (N. Quinn, 0.28-m Schmidt-Cassegrain + CCD);
    16.77, 15.7, -- (T. Csorgei, Blahová, 0.275-m Schmidt-Cassegrain + CCD);
    16.48, 13.1, 2' (M. Mattiazzo, Swan Hill, Victoria, Australia, 0.28-m Schmidt reflector + CCD);
    15.88, 13.0, 4' (S. Fritsche, Koeditz, 0.1-m Refractor + CCD);
    15.53, 14.1, 0.8' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD);
    14.53, 13.9, 0.9' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD);
    13.94, 14.0, 0.94' (K. Hills, 0.5-m Newtonian + CCD);
    13.75, 13.4, 1' (H. Kiiskinen, 0.4-m Ritchey-Chretien + CCD);
    13.53, 13.8, 1.1' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD; 0.5' tail in p.a. 149 deg);
    13.47, 13.2, 1.1' (C. Wyatt, 0.4-m Newtonian);
    12.94, 12.6, 3.7' (P. Dekelver, 0.3-m Newtonian + CCD; 12.6' tail in p.a. 178 deg);
    12.85, 12.9, 1.5' (N. Quinn, 0.28-m Schmidt-Cassegrain + CCD);
    12.77, 14.2, 0.5' (S. Szabo, Agfalva, 0.6-m Newtonian);
    12.56, 13.8, 1.1' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD);
    12.47, 13.8, 0.7' (Y. Yamaguchi, 0.076-m Refractor + CCD);
    11.88, 13.6, 0.75' (N. Quinn, 0.28-m Schmidt-Cassegrain + CCD);
    11.55, 14.1, 0.8' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD);
    05.07, 13.2, 0.6' (R. Ang, 0.2-m Newtonian + CCD);
    04.42, 13.1, 0.6' (O. Miyazaki, 0.32-m Newtonian);
    04.14, 13.2, 0.3' (R. Ang, 0.114-m Newtonian + CCD);
    03.43, 13.2, 0.7' (O. Miyazaki, 0.32-m Newtonian);
    02.89, 13.0, 2.4' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    02.45, 13.6, 1.4' (C. Wyatt, 0.4-m Newtonian);
    02.42, 12.5, 1' (O. Miyazaki, 0.32-m Newtonian);
    01.90, 13.7, 1.32' (K. Hills, 0.5-m Newtonian + CCD);
    01.78, 12.8, 0.8' (C. Harder, Region Bult, 0.298-m Newtonian);
    01.62, 13.7, 1' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD);
    01.45, 13.0, 0.8' (C. Wyatt, 0.4-m Newtonian);

C/2019 L3 (ATLAS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
feb 09.70, 13.6, 2.9' (T. Lehmann, Australia (remote), 0.279-m Newtonian + CCD);

C/2019 O3
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
feb 01.28, 18.8, 0.38' (K. Hills, 0.5-m Newtonian + CCD);

C/2019 U5 (PANSTARRS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
feb 13.55, 14.5, 0.5' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD);
    13.52, 14.7, 0.5' (C. Wyatt, 0.4-m Newtonian);
    12.60, 14.5, 0.5' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD);
    11.57, 14.6, 0.5' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD);
    02.48, 13.9, 0.4' (C. Wyatt, 0.4-m Newtonian);
    01.63, 14.5, 0.5' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD);

C/2020 F2 (ATLAS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
feb 14.27, 18.7, 0.38' (K. Hills, 0.5-m Newtonian + CCD);
    05.20, 18.6, 0.38' (K. Hills, 0.5-m Newtonian + CCD);

C/2020 K1 (PANSTARRS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
feb 16.48, 14.9, 1' (M. Mattiazzo, Swan hill, Victoria, Australia, 0.28-m Schmidt reflector + CCD);
    15.54, 14.8, 0.8' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD);
    14.54, 15.1, 0.6' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD);
    13.54, 14.1, 0.9' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD; 3' tail in p.a. 209 deg);
    13.51, 15.0, 0.6' (C. Wyatt, 0.4-m Newtonian);
    12.59, 14.8, 0.9' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD; 2.3' tail in p.a. 201 deg);
    11.56, 14.8, 1' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD; 1.8' tail in p.a. 203 deg);
    05.58, 14.0, 3.2' (T. Lehmann, Australia (remote), 0.279-m Newtonian + CCD; 0.23° tail in p.a. 210 deg);
    02.50, 14.7, 0.4' (C. Wyatt, 0.4-m Newtonian);
    02.47, 15.0, 0.5' (C. Wyatt, 0.4-m Newtonian);
    01.48, 14.8, 0.9' (C. Wyatt, 0.4-m Newtonian);

C/2020 V2 (ZTF)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
feb 02.42, 12.6, 1.7' (C. Wyatt, 0.4-m Newtonian);
    01.42, 13.2, 1.2' (C. Wyatt, 0.4-m Newtonian);

C/2021 G2 (Atlas)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
feb 20.60, 14.7, 0.5' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD);
    16.57, 14.7, 0.5' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD);
    16.53, 14.3, 1' (M. Mattiazzo, Swan Hill, Victoria, Australia, 0.28-m Schmidt reflector + CCD; 2' tail in p.a. 270 deg);
    14.58, 14.4, 0.8' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD);
    13.58, 14.4, 0.9' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD);
    13.52, 14.6, 0.6' (C. Wyatt, 0.4-m Newtonian);
    12.62, 14.4, 0.9' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD);
    11.62, 14.4, 1' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD);
    05.69, 14.3, 1.5' (T. Lehmann, Australia (remote), 0.279-m Newtonian + CCD; 0.09° tail in p.a. 264 deg);

C/2021 S3 (PANSTARRS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
feb 20.83, 10.5, 1.6' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD; 6.8' tail in p.a. 242 deg);
    19.29, 10.2, 3' (J. de Souza Aguiar, 0.3-m Newtonian);
    18.22, 9.6, 3' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    18.18, 9.8, 1' (G. Pappa, Pedara,Sicily,Italy, 0.3-m Camera lens + CCD);
    16.81, 10.5, 1.3' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD; 6' tail in p.a. 241 deg);
    16.13, 9.9, 2' (P. Guzik, 0.326-m Newtonian);
    14.83, 10.2, 2' (O. Miyazaki, 0.32-m Newtonian);
    13.84, 10.5, 1.4' (O. Miyazaki, 0.32-m Newtonian);
    13.81, 10.3, 1.6' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD; 5.8' tail in p.a. 242 deg);
    13.77, 9.5, 2' (M. Mattiazzo, Swan Hill, Victoria, Australia, 25x100 Binoculars);
    13.77, 10.0, 1.9' (K. Harikae, 0.15-m Newtonian + CCD; 3.7' tail in p.a. 270 deg);
    13.76, 9.8, 3' (M. Mattiazzo, Swan Hill, Victoria, Australia, 0.07-m Camera lens + CCD);
    13.30, 10.0, 2' (W. Souza, 0.15-m Newtonian);
    12.83, 10.0, 1.7' (O. Miyazaki, 0.32-m Newtonian);
    12.29, 10.0, 3' (J. de Souza Aguiar, 0.3-m Newtonian);
    11.77, 9.7, 3' (M. Mattiazzo, Swan Hill, Victoria, Australia, 0.07-m Camera lens + CCD);
    11.30, 10.0, 2' (W. Souza, 0.15-m Newtonian);
    10.84, 9.7, 5.7' (T. Lehmann, Australia (remote), 0.279-m Newtonian + CCD; 0.73° tail in p.a. 227 deg);
    10.76, 9.9, 2' (K. Harikae, 0.15-m Newtonian + CCD; 4' tail in p.a. 264 deg);
    10.30, 9.8, 3' (M. Goiato, 0.22-m Newtonian);
    10.28, 10.0, 4' (J. de Souza Aguiar, 0.3-m Newtonian);
    09.84, 9.7, 5.3' (T. Lehmann, Australia (remote), 0.279-m Newtonian + CCD; 0.59° tail in p.a. 230 deg);
    09.77, 10.5, 2.1' (K. Harikae, 0.15-m Newtonian + CCD);
    08.76, 9.8, 2' (M. Mattiazzo, Swa Hill, Victoria, Australia, 25x100 Binoculars);
    08.76, 10.1, 2' (M. Mattiazzo, Swan Hill, Victoria, Australia, 0.07-m Camera lens + CCD);
    07.85, 9.9, 2.3' (K. Yoshimoto, 0.203-m Ritchey-Chretien + CCD; 14' tail in p.a. 235 deg);
    06.84, 10.1, 1.8' (O. Miyazaki, 0.32-m Newtonian);

C/2021 S4 (Tsuchinshan)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
feb 08.90, 17.1, 0.33' (S. Shurpakov, 0.2-m Schmidt-Newtonian);

C/2021 T4 (Lemmon)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
feb 21.22, 15.8, 1.8' (T. Lehmann, Nerpio (remote), 0.25-m Newtonian + CCD);
    15.26, 17.5, 0.38' (K. Hills, 0.5-m Newtonian + CCD);
    13.16, 16.4, 0.6' (P. Dekelver, 0.3-m Newtonian + CCD);
    05.13, 15.3, 2.1' (T. Lehmann, Nerpio (remote), 0.25-m Newtonian + CCD);

C/2022 E2 (ATLAS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
feb 28.47, 12.5, 1.1' (O. Miyazaki, 0.32-m Newtonian);
    27.46, 13.0, 0.6' (O. Miyazaki, 0.32-m Newtonian);
    26.96, 13.2, 0.75' (N. Quinn, 0.28-m Schmidt-Cassegrain + CCD; 2' tail in p.a. 142 deg);
    18.87, 13.1, 0.75' (N. Quinn, 0.28-m Schmidt-Cassegrain + CCD; 2.1' tail in p.a. 130 deg);
    16.90, 12.8, 2.2' (M. Paradowski, 0.075-m Refractor + CCD);
    16.88, 13.0, 2.2' (M. Paradowski, 0.075-m Refractor + CCD);
    16.85, 15.6, -- (T. Csorgei, Blahová, 0.275-m Schmidt-Cassegrain + CCD);
    16.54, 13.6, 1' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD);
    16.52, 13.4, 1' (M. Mattiazzo, Swan Hill, Victoria, Australia, 0.28-m Schmidt reflector + CCD; 4' tail in p.a. 140 deg);
    16.44, 12.1, 1' (O. Miyazaki, 0.32-m Newtonian);
    15.97, 13.6, 0.94' (K. Hills, 0.5-m Newtonian + CCD);
    15.54, 13.0, 0.8' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD; 1.2' tail in p.a. 129 deg);
    14.56, 13.6, 1' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD; 1.5' tail in p.a. 130 deg);
    13.75, 13.4, 0.9' (H. Kiiskinen, 0.4-m Ritchey-Chretien + CCD; 2.3' tail in p.a. 136 deg);
    13.55, 13.5, 1.2' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD; 1.9' tail in p.a. 131 deg);
    13.48, 13.1, 0.8' (C. Wyatt, 0.4-m Newtonian; 1.3' tail in p.a. 130 deg);
    13.44, 12.0, 0.8' (O. Miyazaki, 0.32-m Newtonian);
    12.90, 13.3, 0.56' (N. Quinn, 0.28-m Schmidt-Cassegrain + CCD; 2' tail in p.a. 136 deg);
    12.86, 12.9, 2.9' (P. Dekelver, 0.3-m Newtonian + CCD; 3.4' tail in p.a. 133 deg);
    12.85, 13.3, -- (G. van Buitenen, Dordrecht, NL (G06), 0.203-m Ritchey-Chretien + CCD);
    12.77, 13.8, 0.6' (S. Szabo, Agfalva, 0.6-m Newtonian);
    12.73, 13.3, 0.9' (H. Kiiskinen, 0.4-m Ritchey-Chretien + CCD; 2.9' tail in p.a. 141 deg);
    12.61, 13.4, 1.3' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD; 2.3' tail in p.a. 134 deg);
    12.58, 12.2, 1.4' (O. Miyazaki, 0.32-m Newtonian);
    12.41, 13.0, 0.9' (S. Yoshida, 0.4-m Newtonian);
    11.85, 13.4, 0.8' (D. Heggie, Edinburgh, UK, 0.05-m Refractor + CCD; 1.6' tail in p.a. 138 deg);
    11.58, 13.4, 1.2' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD; 1.8' tail in p.a. 132 deg);
    09.76, 13.1, -- (P. Yi, Andong, 0.61-m Newtonian);
    09.57, 12.7, 0.9' (O. Miyazaki, 0.32-m Newtonian);
    09.46, 12.9, 1.3' (Y. Yamaguchi, 0.076-m Refractor + CCD);
    08.03, 13.7, 0.75' (K. Hills, 0.5-m Newtonian + CCD);
    05.86, 13.1, 2' (S. Fritsche, Koeditz, 0.1-m Refractor + CCD; 0.05° tail in p.a. 139 deg);
    05.12, 12.6, 1.1' (R. Ang, 0.2-m Newtonian + CCD);
    04.96, 13.3, 1.3' (T. Lehmann, Nerpio (remote), 0.25-m Newtonian + CCD; 0.06° tail in p.a. 139 deg);
    04.58, 12.4, 1.1' (O. Miyazaki, 0.32-m Newtonian);
    04.03, 13.3, 1.1' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    03.98, 12.8, 1.3' (C. Harder, Jeersdorf f, 0.298-m Newtonian);
    02.93, 13.3, 0.8' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    02.90, 13.0, 1' (G. Pappa, Pedara,Sicily,Italy, 0.3-m Camera lens + CCD);
    02.57, 12.9, 0.8' (O. Miyazaki, 0.32-m Newtonian);
    02.48, 13.4, 0.7' (C. Wyatt, 0.4-m Newtonian);
    01.86, 12.9, 1.8' (P. Dekelver, 0.3-m Newtonian + CCD; 3.4' tail in p.a. 141 deg);
    01.79, 12.6, 0.9' (C. Harder, Region Bult, 0.298-m Newtonian);
    01.77, 13.0, 1.7' (S. Fritsche, Koeditz, 0.1-m Refractor + CCD; 0.07° tail in p.a. 139 deg);
    01.47, 13.0, 1' (C. Wyatt, 0.4-m Newtonian; 1.5' tail in p.a. 106 deg);

C/2022 E3 (ZTF)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
feb 07.61, 17.7, 1.1' (T. Lehmann, Australia (remote), 0.279-m Newtonian + CCD; 0.28° tail in p.a. 72 deg);

C/2022 L2 (ATLAS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
feb 20.69, 15.2, 0.5' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD);
    16.71, 15.5, 0.5' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD);
    15.73, 15.0, 0.7' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD);
    14.81, 15.0, 0.8' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD);
    13.73, 14.9, 0.8' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD);
    13.22, 14.3, 0.7' (P. Dekelver, 0.3-m Newtonian + CCD);
    12.81, 14.1, 2.1' (T. Lehmann, Australia (remote), 0.279-m Newtonian + CCD; 0.07° tail in p.a. 30 deg);
    05.84, 14.2, 2.3' (T. Lehmann, Australia (remote), 0.279-m Newtonian + CCD; 0.05° tail in p.a. 23 deg);

C/2022 QE78 (ATLAS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
feb 15.53, 16.4, 0.5' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD);
    14.53, 16.3, 0.5' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD);
    13.85, 16.9, 0.38' (K. Hills, 0.5-m Newtonian + CCD);
    13.54, 16.4, 0.5' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD);
    12.88, 16.0, 0.7' (P. Dekelver, 0.3-m Newtonian + CCD);
    12.57, 16.4, 0.5' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD);
    11.55, 16.4, 0.5' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD);
    09.65, 16.4, 0.6' (T. Lehmann, Australia (remote), 0.279-m Newtonian + CCD);
    05.97, 16.9, 0.38' (K. Hills, 0.5-m Newtonian + CCD);
    02.87, 16.5, 0.4' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    01.62, 16.1, 0.6' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD);

C/2022 U3 (Bok)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
feb 12.91, 17.3, 0.7' (P. Dekelver, 0.3-m Newtonian + CCD; 0.6' tail in p.a. 295 deg);
    07.95, 18.3, 0.38' (K. Hills, 0.5-m Newtonian + CCD);

C/2023 A3 (Tsuchinshan-ATLAS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
feb 24.95, 12.3, 0.8' (J. Xiong, Daocheng, China(remote,O46), 0.203-m Newtonian + CCD; 1.2' tail);
    20.73, 13.1, 1' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD);
    18.20, 13.0, 1.1' (P. Carson, PGC Observatory Z10, Fregenal de la sierra, Spain, 0.315-m Cassegrain reflector + CCD);
    16.76, 12.9, 1' (M. Mattiazzo, Swan Hill, Victoria, Australia, 0.28-m Schmidt reflector + CCD);
    16.74, 13.4, 0.9' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD);
    16.28, 13.9, 0.38' (K. Hills, 0.5-m Newtonian + CCD);
    16.14, 12.6, 0.5' (E. Banach, 0.25-m Newtonian);
    16.12, 12.4, 1' (P. Guzik, 0.326-m Newtonian);
    14.82, 12.8, 0.9' (O. Miyazaki, 0.32-m Newtonian);
    14.22, 13.0, 0.6' (J. Chambó Bris, Valles, Valencia, Spain, 0.2-m Newtonian + CCD; 0.9' tail in p.a. 308 deg);
    13.82, 13.1, 0.7' (O. Miyazaki, 0.32-m Newtonian);
    13.78, 13.5, 1' (M. Mattiazzo, Swan Hill, Victoria, Australia, 0.07-m Camera lens + CCD);
    13.76, 13.1, 0.7' (K. Harikae, 0.15-m Newtonian + CCD);
    13.75, 13.4, 1.1' (A. Pearce, 0.35-m Schmidt-Cassegrain + CCD; 1' tail in p.a. 309 deg);
    13.18, 13.3, 0.9' (S. Fritsche, Koeditz, 0.1-m Refractor + CCD);
    13.18, 13.1, 1.5' (P. Dekelver, 0.3-m Newtonian + CCD; 1.3' tail in p.a. 307 deg);
    12.82, 13.1, 0.7' (O. Miyazaki, 0.32-m Newtonian);
    10.76, 13.4, 0.9' (K. Harikae, 0.15-m Newtonian + CCD);
    09.80, 13.4, 1' (T. Lehmann, Australia (remote), 0.279-m Newtonian + CCD; 1.5' tail in p.a. 307 deg);
    09.77, 13.5, 0.7' (K. Harikae, 0.15-m Newtonian + CCD);
    08.77, 13.7, 1' (M. Mattiazzo, Swan Hill, Victoria, Australia, 0.07-m Camera lens + CCD);
    07.96, 13.0, -- (J. Xiong, Daocheng, China(remote,O46), 0.203-m Newtonian + CCD);
    07.82, 13.3, 0.8' (K. Yoshimoto, 0.203-m Ritchey-Chretien + CCD; 1' tail in p.a. 313 deg);
    05.24, 13.6, 0.9' (T. Lehmann, Nerpio (remote), 0.25-m Newtonian + CCD; 1' tail in p.a. 309 deg);

C/2023 C2 (ATLAS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
feb 07.71, 15.8, 1' (T. Lehmann, Australia (remote), 0.279-m Newtonian + CCD);

C/2023 H2 (Lemmon)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
feb 05.55, 14.4, 3.5' (T. Lehmann, Australia (remote), 0.279-m Newtonian + CCD);

C/2023 P1 (Nishimura)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
feb 04.66, 14.1, 3.7' (T. Lehmann, Australia (remote), 0.279-m Newtonian + CCD);

C/2023 R2 (PANSTARRS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
feb 04.83, 19.1, 0.38' (K. Hills, 0.5-m Newtonian + CCD);

C/2023 S3 (Lemmon)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
feb 13.77, 12.4, 1' (M. Mattiazzo, Swan Hill, Victoria, Australia, 0.07-m Camera lens + CCD);
    11.78, 12.6, 1' (M. Mattiazzo, Swan Hill, Victoria, Australia, 0.07-m Camera lens + CCD);

C/2023 T3 (Fuls)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
feb 13.05, 17.0, 0.38' (K. Hills, 0.5-m Newtonian + CCD);
    05.09, 16.5, 0.38' (K. Hills, 0.5-m Newtonian + CCD);

C/2023 V4 (Camarasa-Duszanowicz)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
feb 12.80, 14.2, 0.5' (J. Chambó Bris, Valles, Valencia, Spain, 0.2-m Newtonian + CCD; 25" tail in p.a. 75 deg);
    07.57, 15.5, 1.1' (T. Lehmann, Australia (remote), 0.279-m Newtonian + CCD; 1.5' tail in p.a. 109 deg);
    05.84, 16.6, 0.38' (K. Hills, 0.5-m Newtonian + CCD);

C/2024 C4 (ATLAS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
feb 16.77, 14.2, 2' (M. Mattiazzo, Swan Hill, Victoria, Australia, 0.28-m Schmidt reflector + CCD);

P/2001 Q6 (NEAT)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
feb 12.72, 14.7, 0.6' (H. Kiiskinen, 0.4-m Ritchey-Chretien + CCD);
    10.46, 13.1, 2' (K. Yoshimoto, 0.077-m Refractor + CCD);
    04.81, 12.5, 5.8' (T. Lehmann, Nerpio (remote), 0.25-m Newtonian + CCD);
    03.74, 13.0, 0.4' (G. Pappa, Pedara,Sicily,Italy, 0.3-m Camera lens + CCD);

P/2011 NO1
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
feb 08.61, 13.7, 4.2' (T. Lehmann, Australia (remote), 0.279-m Newtonian + CCD);

P/2023 S1
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2024
feb 03.83, 18.8, 0.38' (K. Hills, 0.5-m Newtonian + CCD);