Recent Comet Brightness Estimates

2I/Borisov
Total-magnitude and coma-diameter estimates:
2019 Oct. 31.21, 14.5, 0.5' (K. Hills, 0.5-m Newtonian reflector)
2019 Oct. 31.18, 15.9, 1.6' (S. Fritsche, Koeditz, 0.1-m refractor)
2019 Oct. 27.17, 16.8, 0.1' (V. Star, Edelweissspitze, Austria, 0.914-m Newtonian reflector)
2019 Oct. 27.13, 15.8, 0.15' (M. Paradowski, Lublin, Poland, 0.067-m Maksutov-Cassegrain)

29P/Schwassmann-Wachmann
Total-magnitude and coma-diameter estimates:
2019 Nov. 19.42, 14.7, 0.9' (C. Wyatt, 0.4-m Newtonian reflector)
2019 Nov. 16.96, 13.8, 1.4' (K. Hills, 0.5-m Newtonian reflector)
2019 Nov. 05.97, 12.2, 10' (S. Fritsche, Koeditz, 0.1-m refractor)
2019 Nov. 04.96, 14.5, 1' (S. Szabo, Agfalva, 0.6-m Newtonian reflector)
2019 Nov. 04.84, 12.7, 1.3' (K. Hills, 0.5-m Newtonian reflector)
2019 Nov. 03.83, 12.7, 2.5' (K. Hills, 0.5-m Newtonian reflector)
2019 Nov. 02.83, 12.5, 2.4' (K. Hills, 0.5-m Newtonian reflector)
2019 Nov. 02.62, 14.3, 1.3' (C. Wyatt, 0.4-m Newtonian reflector)
2019 Nov. 01.84, 12.8, 3.8' (K. Hills, 0.5-m Newtonian reflector)
2019 Nov. 01.55, 14.2, 0.9' (S. Yoshida, 0.4-m Newtonian reflector)
2019 Oct. 31.91, 12.8, 3.4' (K. Hills, 0.5-m Newtonian reflector)
2019 Oct. 30.99, 12.6, 3.5' (K. Hills, 0.5-m Newtonian reflector)
2019 Oct. 30.02, 13.0, 1.5' (K. Hills, 0.5-m Newtonian reflector)
2019 Oct. 29.81, 12.6, 5.8' (S. Fritsche, Koeditz, 0.1-m refractor)
2019 Oct. 28.85, 13.1, 1.6' (K. Hills, 0.5-m Newtonian reflector)
2019 Oct. 28.00, 13.2, 1.8' (K. Hills, 0.5-m Newtonian reflector)
2019 Oct. 26.91, 12.5, 7.1' (S. Fritsche, Koeditz, 0.1-m refractor)
2019 Oct. 25.87, 11.0, 4' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain)
2019 Oct. 24.88, 13.6, 1.6' (K. Hills, 0.5-m Newtonian reflector)

68P/Klemola
Total-magnitude and coma-diameter estimates:
2019 Nov. 10.72, 13.8, 1.8' (S. Fritsche, Koeditz, 0.1-m refractor)
2019 Oct. 29.73, 13.6, 2.2' (S. Fritsche, Koeditz, 0.1-m refractor)
2019 Oct. 28.44, 13.3, 3.4' (T. Lehmann, SSO (remote), 0.106-m refractor)
2019 Oct. 25.81, 10.4, 2.5' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain)

76P/West-Kohoutek-Ikemura
Total-magnitude and coma-diameter estimates:
2019 Oct. 29.21, 18.3, 0.2' (K. Hills, 0.5-m Newtonian reflector)

78P/Gehrels
Total-magnitude and coma-diameter estimates:
2019 Oct. 29.25, 15.7, 0.5' (K. Hills, 0.5-m Newtonian reflector)

95P/Chiron
Total-magnitude and coma-diameter estimates:
2019 Oct. 28.95, 18.0, 0.2' (K. Hills, 0.5-m Newtonian reflector)

101P/Chernykh
Total-magnitude and coma-diameter estimates:
2019 Nov. 04.91, 14.8, 0.4' (S. Szabo, Agfalva, 0.6-m Newtonian reflector)

114P/Wiseman-Skiff
Total-magnitude and coma-diameter estimates:
2019 Nov. 18.72, 15.1, 0.4' (S. Szabo, Agfalva, 0.6-m Newtonian reflector)
2019 Nov. 06.02, 15.2, 1.3' (S. Fritsche, Koeditz, 0.1-m refractor)
2019 Nov. 04.01, 14.7, 0.8' (K. Hills, 0.5-m Newtonian reflector)
2019 Oct. 29.96, 15.8, 1.1' (S. Fritsche, Koeditz, 0.1-m refractor)
2019 Oct. 28.11, 15.7, 0.5' (K. Hills, 0.5-m Newtonian reflector)

155P/Shoemaker
Total-magnitude and coma-diameter estimates:
2019 Oct. 29.26, 14.7, 0.6' (K. Hills, 0.5-m Newtonian reflector)
2019 Oct. 27.06, 14.7, 1.7' (S. Fritsche, Koeditz, 0.1-m refractor; 1.0' tail in p.a. 299)

160P/LINEAR
Total-magnitude and coma-diameter estimates:
2019 Oct. 29.84, 14.9, 0.6' (K. Hills, 0.5-m Newtonian reflector)

174P/Echeclus
Total-magnitude and coma-diameter estimates:
2019 Nov. 03.03, 19.0, 0.2' (K. Hills, 0.5-m Newtonian reflector)

215P/NEAT
Total-magnitude and coma-diameter estimates:
2019 Oct. 28.83, 18.2, 0.2' (K. Hills, 0.5-m Newtonian reflector)

223P/Skiff
Total-magnitude and coma-diameter estimates:
2019 Oct. 29.16, 20.0, 0.2' (K. Hills, 0.5-m Newtonian reflector)

260P/McNaught
Total-magnitude and coma-diameter estimates:
2019 Nov. 18.90, 11.3, 1' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain)
2019 Nov. 18.81, 11.6, 1.5' (U. Pilz, 0.32-m Newtonian reflector)
2019 Nov. 18.73, 12.1, 4.5' (S. Fritsche, Koeditz, 0.1-m refractor; 0.1-deg tail in p.a. 211)
2019 Nov. 16.81, 11.6, 1' (W. Kutschera, 0.54-m Newtonian reflector; 0.07-deg tail)
2019 Nov. 16.77, 12.3, 0.9' (M. Meyer, 0.254-m Newtonian reflector)
2019 Nov. 10.17, 11.7, 0.8' (C. Harder, Jeersdorf, Germany h, 0.3-m Newtonian reflector)
2019 Nov. 08.12, 12.5, 1' (C. Harder, Jeersdorf, Germany h, 0.3-m Newtonian reflector)
2019 Nov. 04.98, 11.7, 1.3' (S. Szabo, Agfalva, 0.6-m Newtonian reflector; 6.0' tail in p.a. 220)
2019 Nov. 02.41, 12.4, 0.8' (S. Yoshida, 0.4-m Newtonian reflector)
2019 Nov. 01.57, 12.1, 1.1' (S. Yoshida, 0.4-m Newtonian reflector)
2019 Oct. 31.87, 12.0, 0.7' (C. Harder, Kirchheim, A33, 0.531-m Newtonian reflector; 1.5' tail in p.a. 230)
2019 Oct. 31.86, 11.8, 5.1' (S. Fritsche, Koeditz, 0.1-m refractor; 0.1-deg tail in p.a. 215)
2019 Oct. 31.80, 12.3, 1' (M. Meyer, 0.254-m Newtonian reflector)
2019 Oct. 30.87, 11.4, 6.1' (S. Fritsche, Koeditz, 0.1-m refractor; 0.15-deg tail in p.a. 223)
2019 Oct. 30.84, 12.1, 1.3' (M. Meyer, 0.254-m Newtonian reflector)
2019 Oct. 30.81, 12.0, 0.8' (C. Harder, Kirchheim, A 33, 0.531-m Newtonian reflector; 1.2' tail in p.a. 230)
2019 Oct. 29.88, 12.0, 0.7' (C. Harder, Kirchheim, A 33, 0.531-m Newtonian reflector; 1.4' tail in p.a. 230)
2019 Oct. 29.86, 12.0, 0.8' (J. Warell, Lindby Observatory (K60), Skurup, Sweden , 0.25-m Newtonian reflector)
2019 Oct. 29.86, 11.9, 3.5' (S. Fritsche, Koeditz, 0.1-m refractor; 0.08-deg tail in p.a. 226)
2019 Oct. 29.85, 12.0, 1.3' (M. Meyer, 0.254-m Newtonian reflector)
2019 Oct. 29.01, 11.6, 1.5' (K. Hills, 0.5-m Newtonian reflector)
2019 Oct. 28.21, 11.9, 3.9' (T. Lehmann, Mayhill (remote), 0.106-m refractor; 0.17-deg tail in p.a. 222)
2019 Oct. 27.92, 12.1, -- (C. Harder, Kirchheim, A 33, 0.531-m Newtonian reflector)
2019 Oct. 27.86, 12.2, 2.26' (N. James, 970, 0.28-m Schmidt-Cassegrain)
2019 Oct. 26.87, 11.6, 5.6' (S. Fritsche, Koeditz, 0.1-m refractor; 0.11-deg tail in p.a. 225)
2019 Oct. 25.84, 10.7, 2' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain)
2019 Oct. 23.82, 11.8, 4.5' (S. Fritsche, Koeditz, 0.1-m refractor; 0.13-deg tail in p.a. 228)
2019 Oct. 23.76, 11.8, 1' (C. Harder, Jeersdorf, Germany f, 0.531-m Newtonian reflector)
2019 Oct. 23.01, 11.6, 1.6' (N. Paul, Canary Island , Teide , MPC - G40, 0.5-m Schmidt-Cassegrain; 6.7' tail in p.a. 223)

261P/Larson
Total-magnitude and coma-diameter estimates:
2019 Nov. 05.92, 16.1, 1.2' (S. Fritsche, Koeditz, 0.1-m refractor; 1.8' tail in p.a. 245)
2019 Oct. 30.04, 16.4, 0.4' (K. Hills, 0.5-m Newtonian reflector)
2019 Oct. 23.09, 16.4, 0.4' (K. Hills, 0.5-m Newtonian reflector)

266P/Christensen
Total-magnitude and coma-diameter estimates:
2019 Oct. 28.17, 18.6, 0.2' (K. Hills, 0.5-m Newtonian reflector)

C/2015 O1 (PANSTARRS)
Total-magnitude and coma-diameter estimates:
2019 Oct. 30.18, 16.2, 0.6' (K. Hills, 0.5-m Newtonian reflector)

C/2016 M1 (PANSTARRS)
Total-magnitude and coma-diameter estimates:
2019 Oct. 29.20, 14.1, 0.8' (K. Hills, 0.5-m Newtonian reflector)
2019 Oct. 23.69, 14.7, 2.1' (T. Lehmann, SSO (remote), 0.32-m Newtonian reflector)

C/2016 X1 (Lemmon)
Total-magnitude and coma-diameter estimates:
2019 Oct. 29.22, 19.0, 0.2' (K. Hills, 0.5-m Newtonian reflector)

C/2017 B3 (LINEAR)
Total-magnitude and coma-diameter estimates:
2019 Nov. 19.43, 14.7, 0.5' (C. Wyatt, 0.4-m Newtonian reflector)

C/2017 K2 (PANSTARRS)
Total-magnitude and coma-diameter estimates:
2019 Nov. 10.77, 16.5, 0.9' (S. Fritsche, Koeditz, 0.1-m refractor)
2019 Oct. 30.79, 16.8, 1' (S. Fritsche, Koeditz, 0.1-m refractor)
2019 Oct. 25.76, 16.2, 1.1' (T. Lehmann, Weimar, 0.2-m Newtonian reflector)
2019 Oct. 23.74, 16.6, 0.9' (S. Fritsche, Koeditz, 0.1-m refractor)

C/2017 T2 (PANSTARRS)
Total-magnitude and coma-diameter estimates:
2019 Nov. 20.94, 10.7, 1.9' (M. Collins, Everton, 0.254-m Schmidt-Cassegrain)
2019 Nov. 20.91, 10.2, 3' (D. Vansteelant, Varsenare, 0.3-m Newtonian reflector)
2019 Nov. 18.86, 11.1, 1.6' (U. Pilz, 0.32-m Newtonian reflector; 0.08-deg tail in p.a. 208)
2019 Nov. 18.85, 9.3, 6' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain)
2019 Nov. 18.81, 9.7, 1.9' (M. Collins, Everton, 0.254-m Schmidt-Cassegrain)
2019 Nov. 10.18, 11.2, 1.3' (C. Harder, Jeersdorf, Germany h, 0.3-m Newtonian reflector; 4.7' tail in p.a. 240)
2019 Nov. 10.18, 11.3, 1.4' (W. Kutschera, 0.54-m Newtonian reflector; 0.07-deg tail)
2019 Nov. 08.14, 11.2, 1.1' (C. Harder, Jeersdorf, Germany h, 0.3-m Newtonian reflector; 5.0' tail in p.a. 230)
2019 Nov. 06.68, 12.5, 0.8' (C. Wyatt, 0.4-m Newtonian reflector; 1.4' tail in p.a. 226)
2019 Nov. 05.99, 10.2, 2.2' (M. Collins, Everton, 0.254-m Schmidt-Cassegrain)
2019 Nov. 05.87, 11.5, 4.2' (S. Fritsche, Koeditz, 0.1-m refractor; 0.13-deg tail in p.a. 226)
2019 Nov. 05.11, 11.6, 1.2' (M. Kwinta, Krakow, 0.185-m Newtonian reflector)
2019 Nov. 04.99, 11.6, 1.2' (S. Szabo, Agfalva, 0.6-m Newtonian reflector; 6.0' tail in p.a. 210)
2019 Nov. 03.01, 11.1, 1.7' (K. Hills, 0.5-m Newtonian reflector)
2019 Nov. 03.00, 11.6, 1.2' (M. Kwinta, Krakow, 0.185-m Newtonian reflector)
2019 Nov. 02.64, 12.3, 0.8' (C. Wyatt, 0.4-m Newtonian reflector)
2019 Nov. 02.02, 11.6, 1' (A. Novichonok, observatory, +2C, 0.2-m Newtonian reflector)
2019 Nov. 01.58, 11.0, 2.2' (S. Yoshida, 0.4-m Newtonian reflector)
2019 Oct. 31.98, 11.8, 1' (C. Harder, Kirchheim, A33, 0.531-m Newtonian reflector; 2.5' tail in p.a. 220)
2019 Oct. 31.94, 11.7, 3.8' (S. Fritsche, Koeditz, 0.1-m refractor; 0.15-deg tail in p.a. 229)
2019 Oct. 30.95, 11.5, 1.5' (A. Scholten, Eerbeek, 0.305-m Schmidt-Cassegrain)
2019 Oct. 30.94, 11.2, 1.3' (M. Kwinta, Krakow, 0.185-m Newtonian reflector)
2019 Oct. 30.91, 11.5, 4.9' (S. Fritsche, Koeditz, 0.1-m refractor; 0.15-deg tail in p.a. 228)
2019 Oct. 30.85, 11.4, 1.3' (M. Meyer, 0.254-m Newtonian reflector)
2019 Oct. 30.02, 11.8, 0.8' (C. Harder, Kirchheim, A 33, 0.531-m Newtonian reflector; 1.2' tail in p.a. 230)
2019 Oct. 30.02, 10.8, 2.5' (C. Labordena, La Serra, 0.2-m Schmidt-Cassegrain)
2019 Oct. 29.92, 11.8, 2.8' (S. Fritsche, Koeditz, 0.1-m refractor; 0.12-deg tail in p.a. 230)
2019 Oct. 29.88, 12.0, 1' (J. Warell, Lindby Observatory (K60), Skurup, Sweden , 0.25-m Newtonian reflector)
2019 Oct. 29.86, 11.7, 1.5' (M. Meyer, 0.254-m Newtonian reflector)
2019 Oct. 29.06, 11.3, 1.4' (K. Hills, 0.5-m Newtonian reflector)
2019 Oct. 28.10, 10.6, 1.8' (M. Collins, Everton, 0.254-m Schmidt-Cassegrain)
2019 Oct. 28.00, 11.7, 0.9' (A. Novichonok, observatory, +12C, 0.2-m Newtonian reflector)
2019 Oct. 27.97, 12.0, 0.8' (C. Harder, Kirchheim, A 33, 0.531-m Newtonian reflector)
2019 Oct. 27.93, 12.1, 1.13' (N. James, 970, 0.28-m Schmidt-Cassegrain)
2019 Oct. 27.35, 11.4, 1' (N. Paul, New Mexico Skies at Mayhill, New Mexico - MPC H06, 0.1-m reflector; 2.9' tail in p.a. 234)
2019 Oct. 26.94, 12.1, 2.7' (S. Fritsche, Koeditz, 0.1-m refractor; 0.08-deg tail in p.a. 233)
2019 Oct. 26.93, 11.4, 1.2' (M. Kwinta, Krakow, 0.185-m Newtonian reflector)
2019 Oct. 26.15, 12.0, 2.8' (T. Lehmann, Weimar, 0.2-m Newtonian reflector; 0.1-deg tail in p.a. 232)
2019 Oct. 25.97, 9.4, 6' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain)
2019 Oct. 25.91, 11.5, 1.2' (M. Kwinta, Krakow, 0.185-m Newtonian reflector)
2019 Oct. 24.93, 11.4, 1.3' (M. Kwinta, Krakow, 0.185-m Newtonian reflector)
2019 Oct. 24.90, 11.3, 1.5' (M. Collins, Everton, 0.254-m Schmidt-Cassegrain)
2019 Oct. 24.81, 12.4, 0.8' (V. Bahyl, observatory "Júlia", Zvolenská Slatina, Slovak Republic, Europe, 0.235-m Schmidt-Cassegrain; 0.1-deg tail in p.a. 235)

C/2018 A3 (ATLAS)
Total-magnitude and coma-diameter estimates:
2019 Oct. 29.00, 17.1, 0.3' (K. Hills, 0.5-m Newtonian reflector)

C/2018 A6 (Gibbs)
Total-magnitude and coma-diameter estimates:
2019 Nov. 19.45, 14.7, 0.4' (C. Wyatt, 0.4-m Newtonian reflector)
2019 Nov. 06.67, 14.0, 0.7' (C. Wyatt, 0.4-m Newtonian reflector)
2019 Nov. 02.63, 14.2, 0.7' (C. Wyatt, 0.4-m Newtonian reflector)
2019 Oct. 28.42, 13.7, 3.7' (T. Lehmann, SSO (remote), 0.106-m refractor; 2.0' tail in p.a. 199)

C/2018 DO_4 (LEMMON)
Total-magnitude and coma-diameter estimates:
2019 Nov. 04.93, 15.3, 0.3' (S. Szabo, Agfalva, 0.6-m Newtonian reflector)
2019 Oct. 31.12, 15.5, 1.3' (S. Fritsche, Koeditz, 0.1-m refractor)
2019 Oct. 26.98, 15.6, 1.2' (S. Fritsche, Koeditz, 0.1-m refractor)

C/2018 L2 (ATLAS)
Total-magnitude and coma-diameter estimates:
2019 Oct. 28.15, 17.9, 0.2' (K. Hills, 0.5-m Newtonian reflector)

C/2018 N2 (ASASSN)
Total-magnitude and coma-diameter estimates:
2019 Nov. 20.95, 11.3, 2.3' (M. Collins, Everton, 0.254-m Schmidt-Cassegrain)
2019 Nov. 19.41, 12.4, 1' (C. Wyatt, 0.4-m Newtonian reflector)
2019 Nov. 18.93, 11.2, 2' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain)
2019 Nov. 18.80, 10.1, 2.2' (M. Collins, Everton, 0.254-m Schmidt-Cassegrain)
2019 Nov. 18.79, 10.9, 2.5' (U. Pilz, 0.32-m Newtonian reflector)
2019 Nov. 18.71, 11.9, 5.4' (S. Fritsche, Koeditz, 0.1-m refractor; 0.16-deg tail in p.a. 150)
2019 Nov. 16.78, 11.5, 1.4' (W. Kutschera, 0.54-m Newtonian reflector)
2019 Nov. 16.76, 11.6, 2' (M. Meyer, 0.254-m Newtonian reflector)
2019 Nov. 08.13, 11.6, 1.2' (C. Harder, Jeersdorf, Germany h, 0.3-m Newtonian reflector)
2019 Nov. 06.00, 10.8, 1.9' (M. Collins, Everton, 0.254-m Schmidt-Cassegrain)
2019 Nov. 05.83, 11.8, 5.1' (S. Fritsche, Koeditz, 0.1-m refractor; 0.18-deg tail in p.a. 161)
2019 Nov. 04.96, 11.8, 1.8' (S. Szabo, Agfalva, 0.6-m Newtonian reflector; 3.5' tail in p.a. 160)
2019 Nov. 03.81, 11.2, 1.8' (K. Hills, 0.5-m Newtonian reflector)
2019 Nov. 02.98, 11.5, 1.4' (M. Kwinta, Krakow, 0.185-m Newtonian reflector)
2019 Nov. 02.40, 11.8, 1.8' (S. Yoshida, 0.4-m Newtonian reflector)
2019 Nov. 02.29, 11.3, 1.2' (N. Paul, New Mexico Skies at Mayhill, New Mexico - MPC H06, 0.25-m Schmidt-Newtonian)
2019 Nov. 01.56, 11.5, 2.2' (S. Yoshida, 0.4-m Newtonian reflector; 3.5' tail in p.a. 165)
2019 Oct. 31.81, 11.7, 1' (C. Harder, Kirchheim, A33, 0.531-m Newtonian reflector; 5.0' tail in p.a. 180)
2019 Oct. 31.81, 11.6, 7.1' (S. Fritsche, Koeditz, 0.1-m refractor; 0.15-deg tail in p.a. 163)
2019 Oct. 31.78, 10.8, 2.5' (M. Meyer, 0.254-m Newtonian reflector)
2019 Oct. 30.83, 11.3, 2' (M. Meyer, 0.254-m Newtonian reflector)
2019 Oct. 30.83, 11.6, 5.6' (S. Fritsche, Koeditz, 0.1-m refractor; 0.18-deg tail in p.a. 161)
2019 Oct. 30.80, 11.7, 1' (C. Harder, Kirchheim, A 33, 0.531-m Newtonian reflector)
2019 Oct. 30.01, 11.8, 4' (S. Fritsche, Koeditz, 0.1-m refractor; 0.17-deg tail in p.a. 164)
2019 Oct. 29.89, 11.6, 1.2' (C. Harder, Kirchheim, A 33, 0.531-m Newtonian reflector; 2.0' tail in p.a. 170)
2019 Oct. 29.88, 11.4, 2' (C. Labordena, La Serra, 0.2-m Schmidt-Cassegrain)
2019 Oct. 29.85, 11.7, 1.5' (J. Warell, Lindby Observatory (K60), Skurup, Sweden , 0.25-m Newtonian reflector; 3.0' tail in p.a. 145)
2019 Oct. 29.83, 11.2, 1.5' (M. Meyer, 0.254-m Newtonian reflector)
2019 Oct. 28.20, 11.6, 6.2' (T. Lehmann, Mayhill (remote), 0.106-m refractor; 0.17-deg tail in p.a. 161)
2019 Oct. 28.08, 11.3, 1.8' (K. Hills, 0.5-m Newtonian reflector)
2019 Oct. 27.93, 11.5, 2' (C. Harder, Kirchheim, A 33, 0.531-m Newtonian reflector)
2019 Oct. 27.86, 11.0, 2.2' (M. Collins, Everton, 0.254-m Schmidt-Cassegrain)
2019 Oct. 27.81, 11.7, 3' (N. James, 970, 0.28-m Schmidt-Cassegrain)
2019 Oct. 26.91, 11.5, 1.3' (M. Kwinta, Krakow, 0.185-m Newtonian reflector)
2019 Oct. 26.83, 11.7, 5.3' (S. Fritsche, Koeditz, 0.1-m refractor; 0.13-deg tail in p.a. 164)
2019 Oct. 25.95, 11.3, 1.3' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain)
2019 Oct. 25.90, 11.8, 1.1' (V. Díaz, La Romana, Alicante, España, 0.254-m Newtonian reflector)
2019 Oct. 25.88, 11.4, 1.4' (M. Kwinta, Krakow, 0.185-m Newtonian reflector)
2019 Oct. 24.92, 11.5, 1.3' (M. Kwinta, Krakow, 0.185-m Newtonian reflector)
2019 Oct. 24.87, 10.3, 3' (M. Collins, Everton, 0.254-m Schmidt-Cassegrain)
2019 Oct. 23.78, 11.4, 7.4' (S. Fritsche, Koeditz, 0.1-m refractor; 0.16-deg tail in p.a. 166)
2019 Oct. 23.77, 11.3, 1.8' (C. Harder, Jeersdorf, Germany f, 0.531-m Newtonian reflector)

C/2018 U1 (Lemmon)
Total-magnitude and coma-diameter estimates:
2019 Oct. 26.77, 18.2, 0.5' (S. Fritsche, Koeditz, 0.1-m refractor)

C/2018 W2 (Africano)
Total-magnitude and coma-diameter estimates:
2019 Nov. 19.44, 13.1, 1.3' (C. Wyatt, 0.4-m Newtonian reflector)
2019 Nov. 02.61, 11.1, 3' (C. Wyatt, 0.4-m Newtonian reflector)
2019 Nov. 02.37, 10.7, 1.7' (S. Yoshida, 0.4-m Newtonian reflector)
2019 Nov. 01.39, 11.4, 1.8' (S. Yoshida, 0.4-m Newtonian reflector)
2019 Oct. 28.45, 10.4, 13' (T. Lehmann, SSO (remote), 0.106-m refractor; 0.26-deg tail in p.a. 35)

C/2019 K4 (YE)
Total-magnitude and coma-diameter estimates:
2019 Oct. 28.91, 17.8, 0.3' (K. Hills, 0.5-m Newtonian reflector)

C/2019 K5 (YOUNG)
Total-magnitude and coma-diameter estimates:
2019 Nov. 04.95, 15.6, 0.4' (S. Szabo, Agfalva, 0.6-m Newtonian reflector)
2019 Oct. 29.03, 15.1, 0.7' (K. Hills, 0.5-m Newtonian reflector)

C/2019 K7 (SMITH)
Total-magnitude and coma-diameter estimates:
2019 Oct. 28.84, 16.7, 0.3' (K. Hills, 0.5-m Newtonian reflector)

C/2019 L3 (ATLAS)
Total-magnitude and coma-diameter estimates:
2019 Nov. 18.76, 16.9, 0.5' (S. Fritsche, Koeditz, 0.1-m refractor)
2019 Nov. 05.78, 16.8, 1' (S. Fritsche, Koeditz, 0.1-m refractor)
2019 Oct. 31.75, 17.1, 1' (S. Fritsche, Koeditz, 0.1-m refractor)
2019 Oct. 25.98, 18.1, 0.4' (T. Lehmann, Weimar, 0.2-m Newtonian reflector)

C/2019 N1 (ATLAS)
Total-magnitude and coma-diameter estimates:
2019 Oct. 29.83, 17.3, 0.3' (K. Hills, 0.5-m Newtonian reflector)
2019 Oct. 25.83, 17.2, 0.6' (T. Lehmann, Weimar, 0.2-m Newtonian reflector)

P/2006 F1 (Kowalski)
Total-magnitude and coma-diameter estimates:
2019 Oct. 28.99, 20.0, 0.2' (K. Hills, 0.5-m Newtonian reflector)
2019 Oct. 24.95, 20.0, 0.2' (K. Hills, 0.5-m Newtonian reflector)

P/2008 Y1 (Boattini)
Total-magnitude and coma-diameter estimates:
2019 Oct. 30.24, 16.6, 0.3' (K. Hills, 0.5-m Newtonian reflector)

P/2014 U2 (Kowalski)
Total-magnitude and coma-diameter estimates:
2019 Oct. 25.22, 16.9, 0.2' (K. Hills, 0.5-m Newtonian reflector)

P/2019 M2
Total-magnitude and coma-diameter estimates:
2019 Oct. 28.93, 20.4, 0.2' (K. Hills, 0.5-m Newtonian reflector)