Recent Comet Brightness Estimates

29P/Schwassmann-Wachmann
Total-magnitude and coma-diameter estimates:
2019 Sep. 10.94, 12.8, 1.2' (K. Hills, 0.5-m Newtonian reflector)
2019 Sep. 09.94, 13.3, 1.9' (K. Hills, 0.5-m Newtonian reflector)
2019 Sep. 09.72, [14.0, -- (S. Yoshida, 0.4-m Newtonian reflector)
2019 Sep. 09.01, 14.0, 1.5' (P. Guzik, 0.326-m Newtonian reflector)
2019 Sep. 08.96, 13.1, 1.9' (K. Hills, 0.5-m Newtonian reflector)
2019 Sep. 08.17, 13.2, 2.3' (K. Hills, 0.5-m Newtonian reflector)
2019 Sep. 06.00, 13.2, 2.7' (K. Hills, 0.5-m Newtonian reflector)
2019 Sep. 05.72, 14.7, 1' (C. Wyatt, 0.4-m Newtonian reflector)
2019 Sep. 04.96, 14.0, 1.5' (P. Guzik, 0.326-m Newtonian reflector)
2019 Sep. 04.94, 12.8, 5.3' (S. Fritsche, 0.1-m refractor)
2019 Sep. 04.00, 13.2, 3.1' (K. Hills, 0.5-m Newtonian reflector)
2019 Sep. 03.70, 14.6, 1.4' (C. Wyatt, 0.4-m Newtonian reflector)
2019 Sep. 02.99, 13.3, 2.4' (K. Hills, 0.5-m Newtonian reflector)
2019 Sep. 02.96, 12.6, 5.8' (S. Fritsche, 0.1-m refractor)
2019 Sep. 02.00, 14.3, 0.7' (C. Harder, Jeersdorf, Germany f, 0.531-m Newtonian reflector)
2019 Sep. 01.97, 13.1, 2.3' (K. Hills, 0.5-m Newtonian reflector)
2019 Sep. 01.00, 14.7, 1.2' (J. Cerny, 0.355-m Newtonian reflector)
2019 Aug. 31.99, 13.2, 2' (K. Hills, 0.5-m Newtonian reflector)
2019 Aug. 31.98, 12.4, 7.2' (S. Fritsche, 0.1-m refractor)
2019 Aug. 31.01, 13.8, 0.7' (W. Kutschera, 0.54-m Newtonian reflector)
2019 Aug. 31.00, 14.7, 1.2' (J. Cerny, 0.355-m Newtonian reflector)
2019 Aug. 30.97, 12.5, 6.7' (S. Fritsche, 0.1-m refractor)
2019 Aug. 30.96, 13.2, 4' (M. Lostak, 0.2-m Newtonian reflector)
2019 Aug. 29.04, 13.3, 3' (M. Masek, 0.25-m Schmidt-Cassegrain)
2019 Aug. 29.03, 12.8, 3' (M. Masek, 0.25-m Schmidt-Cassegrain)
2019 Aug. 28.98, 13.5, 2.2' (K. Hills, 0.5-m Newtonian reflector)
2019 Aug. 28.95, 14.4, 1' (J. Cerny, 0.355-m Newtonian reflector)
2019 Aug. 28.71, 13.8, 1.6' (C. Wyatt, 0.4-m Newtonian reflector)
2019 Aug. 27.98, 13.3, 2.2' (K. Hills, 0.5-m Newtonian reflector)
2019 Aug. 27.96, 11.0, 3' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain)
2019 Aug. 27.95, 13.0, 4.5' (S. Fritsche, 0.1-m refractor)
2019 Aug. 27.94, 14.8, 1.5' (J. Cerny, 0.355-m Newtonian reflector)
2019 Aug. 27.90, 13.2, 3.7' (M. Lostak, 0.2-m Newtonian reflector)
2019 Aug. 26.98, 13.3, 1.8' (K. Hills, 0.5-m Newtonian reflector)
2019 Aug. 26.06, 12.6, 5.2' (S. Fritsche, 0.1-m refractor)
2019 Aug. 24.92, 14.3, 0.5' (C. Harder, Jeersdorf, Germany f, 0.531-m Newtonian reflector)
2019 Aug. 24.06, 12.3, 7.7' (S. Fritsche, 0.1-m refractor)
2019 Aug. 22.95, 11.5, 3' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain)

68P/Klemola
Total-magnitude and coma-diameter estimates:
2019 Sep. 16.37, 13.3, 1.4' (C. Wyatt, 0.4-m Newtonian reflector)
2019 Sep. 03.95, 10.8, 3' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain)
2019 Aug. 31.88, 12.7, 1.7' (J. Cerny, 0.355-m Newtonian reflector)
2019 Aug. 30.88, 13.0, 1.8' (J. Cerny, 0.355-m Newtonian reflector)
2019 Aug. 30.83, 13.9, 1.7' (S. Fritsche, 0.1-m refractor; 0.01-deg tail in p.a. 120)
2019 Aug. 28.84, 13.0, 2.2' (J. Cerny, 0.355-m Newtonian reflector)
2019 Aug. 28.43, 13.3, 1.3' (C. Wyatt, 0.4-m Newtonian reflector)
2019 Aug. 27.96, 14.4, 0.8' (M. Masek, 0.25-m Schmidt-Cassegrain; 0.7' tail in p.a. 154)
2019 Aug. 27.96, 14.9, 0.6' (M. Masek, 0.25-m Schmidt-Cassegrain; 0.6' tail in p.a. 153)
2019 Aug. 27.94, 11.1, 2.5' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain)
2019 Aug. 25.84, 13.7, 2.1' (S. Fritsche, 0.1-m refractor)
2019 Aug. 25.82, 14.4, 1.43' (M. Paradowski, Dąbrowa, Poland, 0.05-m reflector)
2019 Aug. 25.58, 13.9, 1.5' (T. Karhula, Wicherina, Western Australia, 0.254-m Newtonian reflector)
2019 Aug. 25.39, 13.3, 4.3' (R. Ramlow, 0.106-m refractor)
2019 Aug. 25.37, 12.2, 11' (T. Lehmann, 0.106-m refractor; 2.3' tail in p.a. 175)
2019 Aug. 25.37, 12.2, 11' (T. Lehmann, 0.106-m refractor; 2.3' tail in p.a. 175)
2019 Aug. 22.92, 11.3, 2' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain)
2019 Aug. 22.84, 13.6, 2.9' (S. Fritsche, 0.1-m refractor; 0.02-deg tail in p.a. 124)
2019 Aug. 20.38, 12.9, 7.9' (T. Lehmann, 0.106-m refractor; 0.05-deg tail in p.a. 168)

78P/Gehrels
Total-magnitude and coma-diameter estimates:
2019 Sep. 03.12, 15.7, 0.8' (S. Fritsche, 0.1-m refractor)
2019 Sep. 02.23, 15.7, 0.5' (M. Masek, 0.25-m Schmidt-Cassegrain; 0.7' tail in p.a. 281)
2019 Sep. 02.23, 16.6, 0.5' (M. Masek, 0.25-m Schmidt-Cassegrain; 0.6' tail in p.a. 283)

95P/Chiron
Total-magnitude and coma-diameter estimates:
2019 Sep. 10.16, 18.0, 0.2' (K. Hills, 0.5-m Newtonian reflector)
2019 Sep. 02.06, 16.9, 0.2' (K. Hills, 0.5-m Newtonian reflector)
2019 Aug. 26.08, 18.0, 0.2' (K. Hills, 0.5-m Newtonian reflector)

101P/Chernykh
Total-magnitude and coma-diameter estimates:
2019 Aug. 24.20, 17.6, 0.4' (M. Masek, 0.3-m Cassegrain reflector)

114P/Wiseman-Skiff
Total-magnitude and coma-diameter estimates:
2019 Sep. 10.03, 18.2, 0.2' (K. Hills, 0.5-m Newtonian reflector)
2019 Aug. 26.18, 18.9, 0.2' (K. Hills, 0.5-m Newtonian reflector)

160P/LINEAR
Total-magnitude and coma-diameter estimates:
2019 Aug. 26.97, 15.7, 0.2' (K. Hills, 0.5-m Newtonian reflector)

174P/Echeclus
Total-magnitude and coma-diameter estimates:
2019 Sep. 10.20, 18.8, 0.2' (K. Hills, 0.5-m Newtonian reflector)
2019 Aug. 30.20, 18.8, 0.2' (K. Hills, 0.5-m Newtonian reflector)

200P/Larsen
Total-magnitude and coma-diameter estimates:
2019 Sep. 01.22, 20.0, 0.2' (K. Hills, 0.5-m Newtonian reflector)

215P/NEAT
Total-magnitude and coma-diameter estimates:
2019 Sep. 01.98, 17.4, 0.3' (K. Hills, 0.5-m Newtonian reflector)
2019 Aug. 21.98, 16.6, 0.3' (K. Hills, 0.5-m Newtonian reflector)

260P/McNaught
Total-magnitude and coma-diameter estimates:
2019 Sep. 11.08, 12.1, 1.1' (M. Meyer, 0.254-m Newtonian reflector)
2019 Sep. 11.08, 12.3, 0.8' (C. Harder, Jeersdorf, Germany h, 0.3-m Newtonian reflector; 2.5' tail in p.a. 245)
2019 Sep. 11.01, 12.3, 1.5' (M. Paradowski, Lublin, Poland, 0.054-m reflector; 0.04-deg tail in p.a. 248)
2019 Sep. 10.09, 12.2, 0.8' (C. Harder, Jeersdorf, Germany h, 0.3-m Newtonian reflector; 2.0' tail in p.a. 220)
2019 Sep. 10.05, 12.1, 1.2' (K. Hills, 0.5-m Newtonian reflector)
2019 Sep. 09.71, 11.6, 1.7' (S. Yoshida, 0.4-m Newtonian reflector; 3.2' tail in p.a. 225)
2019 Sep. 09.00, 11.8, 1.5' (P. Guzik, 0.326-m Newtonian reflector; 0.05-deg tail in p.a. 230)
2019 Sep. 08.17, 12.9, 1.1' (M. Masek, 0.25-m Schmidt-Cassegrain; 10.0' tail in p.a. 242)
2019 Sep. 08.16, 13.4, 1.1' (M. Masek, 0.25-m Schmidt-Cassegrain; 8.8' tail in p.a. 244)
2019 Sep. 08.13, 12.2, 0.7' (C. Harder, Jeersdorf, Germany h, 0.3-m Newtonian reflector; 1.4' tail in p.a. 225)
2019 Sep. 07.93, 12.7, 0.9' (D. Buczynski, tarbatness I81, 0.35-m Schmidt-Cassegrain)
2019 Sep. 07.25, 12.2, 1.2' (M. Goiato, 0.22-m Newtonian reflector)
2019 Sep. 07.05, 12.1, 0.8' (C. Harder, Jeersdorf, Germany h, 0.3-m Newtonian reflector; 1.5' tail in p.a. 240)
2019 Sep. 06.09, 12.3, 1.3' (M. Meyer, 0.254-m Newtonian reflector)
2019 Sep. 06.06, 12.1, 0.9' (C. Harder, Jeersdorf, Germany h, 0.3-m Newtonian reflector; 2.0' tail in p.a. 240)
2019 Sep. 05.73, 12.7, 1' (C. Wyatt, 0.4-m Newtonian reflector; 4.5' tail in p.a. 243)
2019 Sep. 05.07, 12.5, 0.9' (C. Harder, Jeersdorf, Germany h, 0.3-m Newtonian reflector; 2.0' tail in p.a. 245)
2019 Sep. 04.98, 12.1, 5.4' (S. Fritsche, 0.1-m refractor; 0.19-deg tail in p.a. 242)
2019 Sep. 04.94, 12.2, 1.5' (P. Guzik, 0.326-m Newtonian reflector; 0.05-deg tail in p.a. 235)
2019 Sep. 04.22, 13.0, 1.1' (M. Masek, 0.25-m Schmidt-Cassegrain; 7.0' tail in p.a. 246)
2019 Sep. 04.21, 13.5, 1.1' (M. Masek, 0.25-m Schmidt-Cassegrain; 7.0' tail in p.a. 243)
2019 Sep. 04.07, 11.6, 1.5' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain)
2019 Sep. 03.99, 12.2, 1.5' (D. Buczynski, Tarbatness I81, 0.35-m Schmidt-Cassegrain)
2019 Sep. 03.94, 13.2, 0.5' (J. Warell, Lindby Observatory (K60), Skurup, Sweden , 0.25-m Newtonian reflector)
2019 Sep. 03.94, 12.5, 0.9' (M. Masek, 0.3-m Newtonian reflector)
2019 Sep. 03.70, 12.7, 1.2' (C. Wyatt, 0.4-m Newtonian reflector; 2.4' tail in p.a. 245)
2019 Sep. 03.08, 12.3, 1' (M. Meyer, 0.254-m Newtonian reflector)
2019 Sep. 03.01, 12.3, 4.5' (S. Fritsche, 0.1-m refractor; 0.09-deg tail in p.a. 245)
2019 Sep. 02.20, 12.4, 1.5' (K. Hills, 0.5-m Newtonian reflector)
2019 Sep. 02.07, 13.3, 0.7' (C. Harder, Jeersdorf, Germany f, 0.531-m Newtonian reflector; 3.0' tail in p.a. 245)
2019 Sep. 01.03, 12.2, 5.3' (S. Fritsche, 0.1-m refractor; 0.07-deg tail in p.a. 242)
2019 Sep. 01.02, 12.4, 5.1' (T. Lehmann, 0.2-m Newtonian reflector; 0.39-deg tail in p.a. 244)
2019 Sep. 01.02, 12.4, 5.1' (T. Lehmann, 0.2-m Newtonian reflector; 0.39-deg tail in p.a. 244)
2019 Sep. 01.00, 12.5, 2' (J. Cerny, 0.355-m Newtonian reflector)
2019 Aug. 31.09, 11.8, 1.5' (W. Kutschera, 0.54-m Newtonian reflector; 0.04-deg tail)
2019 Aug. 31.08, 12.9, 1.5' (N. James, 0.28-m Schmidt-Cassegrain)
2019 Aug. 31.03, 13.7, 2.2' (M. Lostak, 0.2-m Newtonian reflector)
2019 Aug. 31.01, 12.4, 1' (M. Meyer, 0.254-m Newtonian reflector)
2019 Aug. 31.01, 12.1, 7.4' (S. Fritsche, 0.1-m refractor; 0.08-deg tail in p.a. 244)
2019 Aug. 31.00, 12.8, 2' (J. Cerny, 0.355-m Newtonian reflector)
2019 Aug. 30.95, 13.3, 1' (C. Harder, Jeersdorf, Germany f, 0.531-m Newtonian reflector; 2.5' tail in p.a. 240)
2019 Aug. 30.45, 12.6, 3.8' (T. Lehmann, 0.106-m refractor; 0.44-deg tail in p.a. 244)
2019 Aug. 30.45, 12.6, 3.8' (T. Lehmann, 0.106-m refractor; 0.44-deg tail in p.a. 244)
2019 Aug. 30.01, 11.4, 0.6' (W. Hasubick, 0.44-m Newtonian reflector)
2019 Aug. 29.09, 13.0, 1.2' (M. Masek, 0.25-m Schmidt-Cassegrain; 11.8' tail in p.a. 244)
2019 Aug. 29.08, 13.5, 1.2' (M. Masek, 0.25-m Schmidt-Cassegrain; 4.6' tail in p.a. 243)
2019 Aug. 28.96, 12.6, 2.1' (J. Cerny, 0.355-m Newtonian reflector)
2019 Aug. 28.71, 12.6, 1.1' (C. Wyatt, 0.4-m Newtonian reflector; 4.0' tail in p.a. 246)
2019 Aug. 28.13, 13.1, 1.2' (M. Masek, 0.25-m Schmidt-Cassegrain; 8.2' tail in p.a. 242)
2019 Aug. 28.13, 13.6, 1.1' (M. Masek, 0.25-m Schmidt-Cassegrain; 7.9' tail in p.a. 247)
2019 Aug. 28.11, 11.5, 1.5' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain)
2019 Aug. 27.97, 13.6, 2.9' (M. Lostak, 0.2-m Newtonian reflector)
2019 Aug. 27.96, 13.1, 1.6' (J. Cerny, 0.355-m Newtonian reflector)
2019 Aug. 27.69, 12.4, 2.5' (T. Karhula, Wicherina, Western Australia, 0.254-m Newtonian reflector)
2019 Aug. 26.18, 12.5, 1' (K. Hills, 0.5-m Newtonian reflector)
2019 Aug. 26.08, 12.6, 3.5' (T. Lehmann, 0.2-m Newtonian reflector; 0.21-deg tail in p.a. 243)
2019 Aug. 26.08, 12.6, 3.5' (T. Lehmann, 0.2-m Newtonian reflector; 0.21-deg tail in p.a. 243)
2019 Aug. 25.98, 12.6, 4.5' (S. Fritsche, 0.1-m refractor; 0.09-deg tail in p.a. 243)
2019 Aug. 25.44, 12.7, 2' (R. Ramlow, 0.106-m refractor; 11.0' tail in p.a. 242)
2019 Aug. 23.05, 13.0, 2.3' (S. Fritsche, 0.1-m refractor; 0.07-deg tail in p.a. 243)

261P/Larson
Total-magnitude and coma-diameter estimates:
2019 Sep. 10.14, 16.5, 0.4' (K. Hills, 0.5-m Newtonian reflector)
2019 Sep. 03.20, 16.5, 0.4' (M. Masek, 0.25-m Schmidt-Cassegrain; 1.0' tail in p.a. 255)
2019 Sep. 03.19, 16.9, 0.5' (M. Masek, 0.25-m Schmidt-Cassegrain; 1.1' tail in p.a. 252)
2019 Sep. 03.09, 15.4, 0.4' (K. Hills, 0.5-m Newtonian reflector)
2019 Aug. 27.18, 15.8, 0.3' (K. Hills, 0.5-m Newtonian reflector)

289P/Blanpain
Total-magnitude and coma-diameter estimates:
2019 Sep. 02.05, 19.5, 0.2' (K. Hills, 0.5-m Newtonian reflector)

322P/SOHO
Total-magnitude and coma-diameter estimates:
2019 Sep. 01.25, 6.3, 14.9' (M. Paradowski, SOHO, LASCO C3, 0.008-m reflector)
2019 Sep. 01.10, 4.9, 14.9' (M. Paradowski, SOHO, LASCO C3, 0.008-m reflector)
2019 Aug. 31.94, 4.3, 14.9' (M. Paradowski, SOHO, LASCO C3, 0.008-m reflector)
2019 Aug. 31.77, 4.2, 14.9' (M. Paradowski, SOHO, LASCO C3, 0.008-m reflector)
2019 Aug. 31.69, 4.1, 14.9' (M. Paradowski, SOHO, LASCO C3, 0.008-m reflector)
2019 Aug. 31.63, 4.1, 14.9' (M. Paradowski, SOHO, LASCO C3, 0.008-m reflector)
2019 Aug. 31.53, 4.5, 14.9' (M. Paradowski, SOHO, LASCO C3, 0.008-m reflector)
2019 Aug. 31.48, 4.6, 14.9' (M. Paradowski, SOHO, LASCO C3, 0.008-m reflector)
2019 Aug. 31.39, 4.7, 14.9' (M. Paradowski, SOHO, LASCO C3, 0.008-m reflector)
2019 Aug. 31.32, 4.9, 14.9' (M. Paradowski, SOHO, LASCO C3, 0.008-m reflector)
2019 Aug. 31.24, 5.4, 14.9' (M. Paradowski, SOHO, LASCO C3, 0.008-m reflector)
2019 Aug. 31.15, 5.4, 3' (M. Paradowski, SOHO, LASCO C2, 0.02-m reflector)
2019 Aug. 31.12, 5.5, 3' (M. Paradowski, SOHO, LASCO C2, 0.02-m reflector)
2019 Aug. 31.03, 5.8, 3' (M. Paradowski, SOHO, LASCO C2, 0.02-m reflector)
2019 Aug. 31.02, 6.1, 3' (M. Paradowski, SOHO, LASCO C2, 0.02-m reflector)

C/2010 U3 (Boattini)
Total-magnitude and coma-diameter estimates:
2019 Aug. 31.84, 17.6, 0.6' (S. Fritsche, 0.1-m refractor)
2019 Aug. 30.87, 18.2, 0.2' (J. Hadač, 0.13-m Newtonian reflector)
2019 Aug. 28.91, 17.5, 0.3' (M. Masek, 0.25-m Schmidt-Cassegrain)
2019 Aug. 28.91, 17.6, 0.3' (M. Masek, 0.25-m Schmidt-Cassegrain)

C/2011 KP36 (Spacewatch)
Total-magnitude and coma-diameter estimates:
2019 Sep. 08.23, 18.0, 0.2' (K. Hills, 0.5-m Newtonian reflector)

C/2016 A1 (PANSTARRS)
Total-magnitude and coma-diameter estimates:
2019 Sep. 10.23, 17.2, 0.2' (K. Hills, 0.5-m Newtonian reflector)

C/2016 M1 (PANSTARRS)
Total-magnitude and coma-diameter estimates:
2019 Aug. 24.80, 14.3, 3' (T. Lehmann, 0.32-m Newtonian reflector)
2019 Aug. 24.80, 14.3, 3' (T. Lehmann, 0.32-m Newtonian reflector)

C/2016 N6 (PANSTARRS)
Total-magnitude and coma-diameter estimates:
2019 Aug. 24.78, 15.8, 1.6' (T. Lehmann, 0.32-m Newtonian reflector)
2019 Aug. 24.78, 15.8, 1.6' (T. Lehmann, 0.32-m Newtonian reflector)

C/2016 R2 (PANSTARRS)
Total-magnitude and coma-diameter estimates:
2019 Sep. 02.84, 16.4, 1.4' (T. Lehmann, 0.2-m Newtonian reflector)
2019 Sep. 02.84, 16.4, 1.4' (T. Lehmann, 0.2-m Newtonian reflector)
2019 Aug. 27.85, 16.7, 0.9' (S. Fritsche, 0.1-m refractor)
2019 Aug. 23.86, 16.4, 2.1' (T. Lehmann, 0.2-m Newtonian reflector)
2019 Aug. 23.86, 16.4, 2.1' (T. Lehmann, 0.2-m Newtonian reflector)
2019 Aug. 22.90, 17.1, 0.3' (M. Masek, 0.25-m Schmidt-Cassegrain)
2019 Aug. 22.90, 17.1, 0.4' (M. Masek, 0.25-m Schmidt-Cassegrain)

C/2017 B3 (LINEAR)
Total-magnitude and coma-diameter estimates:
2019 Sep. 05.70, 14.0, 0.8' (C. Wyatt, 0.4-m Newtonian reflector)
2019 Sep. 03.69, 13.8, 1.3' (C. Wyatt, 0.4-m Newtonian reflector)
2019 Aug. 28.70, 14.0, 1.3' (C. Wyatt, 0.4-m Newtonian reflector)

C/2017 K2 (PANSTARRS)
Total-magnitude and coma-diameter estimates:
2019 Sep. 02.85, 17.0, 1.2' (S. Fritsche, 0.1-m refractor)
2019 Aug. 31.91, 16.6, 0.9' (T. Lehmann, 0.2-m Newtonian reflector)
2019 Aug. 31.91, 16.6, 0.9' (T. Lehmann, 0.2-m Newtonian reflector)
2019 Aug. 31.90, 14.8, 0.8' (J. Cerny, 0.355-m Newtonian reflector)
2019 Aug. 31.89, 16.5, 1.1' (S. Fritsche, 0.1-m refractor)
2019 Aug. 30.90, 14.8, 0.7' (J. Cerny, 0.355-m Newtonian reflector)
2019 Aug. 30.88, 16.5, 1.2' (S. Fritsche, 0.1-m refractor)
2019 Aug. 30.83, 16.8, 1.1' (M. Lostak, 0.2-m Newtonian reflector)
2019 Aug. 28.85, 14.7, 1.1' (J. Cerny, 0.355-m Newtonian reflector)
2019 Aug. 27.92, 15.9, 0.5' (M. Masek, 0.25-m Schmidt-Cassegrain)
2019 Aug. 27.92, 16.4, 0.5' (M. Masek, 0.25-m Schmidt-Cassegrain)
2019 Aug. 27.90, 14.4, 0.6' (J. Cerny, 0.355-m Newtonian reflector)
2019 Aug. 25.89, 16.7, 1' (S. Fritsche, 0.1-m refractor)
2019 Aug. 25.86, 17.1, 1' (T. Lehmann, 0.2-m Newtonian reflector)
2019 Aug. 25.86, 17.1, 1' (T. Lehmann, 0.2-m Newtonian reflector)
2019 Aug. 24.99, 16.7, 0.7' (C. Hergenrother, 0.32-m Ritchey-Chretien)
2019 Aug. 22.94, 16.3, 0.5' (M. Masek, 0.25-m Schmidt-Cassegrain)
2019 Aug. 22.94, 17.0, 0.4' (M. Masek, 0.25-m Schmidt-Cassegrain)
2019 Aug. 22.88, 16.6, 1.2' (S. Fritsche, 0.1-m refractor)
2019 Aug. 22.85, 16.5, 1.2' (T. Lehmann, 0.2-m Newtonian reflector)
2019 Aug. 22.85, 16.5, 1.2' (T. Lehmann, 0.2-m Newtonian reflector)

C/2017 M4 (ATLAS)
Total-magnitude and coma-diameter estimates:
2019 Aug. 28.41, 14.8, 0.5' (C. Wyatt, 0.4-m Newtonian reflector)
2019 Aug. 24.41, 14.6, 2.2' (T. Lehmann, 0.32-m Newtonian reflector)
2019 Aug. 24.41, 14.6, 2.2' (T. Lehmann, 0.32-m Newtonian reflector)
2019 Aug. 21.02, 14.8, 0.5' (M. Masek, 0.3-m Cassegrain reflector)
2019 Aug. 21.02, 15.2, 0.5' (M. Masek, 0.3-m Cassegrain reflector)

C/2017 T2 (PANSTARRS)
Total-magnitude and coma-diameter estimates:
2019 Sep. 11.10, 12.2, 1.1' (M. Meyer, 0.254-m Newtonian reflector)
2019 Sep. 11.10, 11.5, 1.9' (C. Harder, Jeersdorf, Germany h, 0.3-m Newtonian reflector)
2019 Sep. 10.10, 11.7, 1.8' (C. Harder, Jeersdorf, Germany h, 0.3-m Newtonian reflector)
2019 Sep. 09.74, 11.6, 1.8' (S. Yoshida, 0.4-m Newtonian reflector)
2019 Sep. 09.02, 12.9, 1.2' (P. Guzik, 0.326-m Newtonian reflector)
2019 Sep. 08.22, 13.0, 0.8' (K. Hills, 0.5-m Newtonian reflector)
2019 Sep. 08.12, 13.4, 0.56' (D. Buczynski, tarbatness I81, 0.35-m Schmidt-Cassegrain)
2019 Sep. 07.20, 13.5, 0.8' (M. Masek, 0.25-m Schmidt-Cassegrain; 2.3' tail in p.a. 234)
2019 Sep. 07.20, 13.8, 0.8' (M. Masek, 0.25-m Schmidt-Cassegrain; 2.0' tail in p.a. 234)
2019 Sep. 06.11, 12.3, 1' (M. Meyer, 0.254-m Newtonian reflector)
2019 Sep. 06.08, 11.8, 1.8' (C. Harder, Jeersdorf, Germany h, 0.3-m Newtonian reflector)
2019 Sep. 05.76, 13.6, 0.9' (C. Wyatt, 0.4-m Newtonian reflector; 1.5' tail in p.a. 228)
2019 Sep. 05.09, 11.7, 1.1' (C. Harder, Jeersdorf, Germany h, 0.3-m Newtonian reflector)
2019 Sep. 04.97, 12.8, 1.2' (P. Guzik, 0.326-m Newtonian reflector)
2019 Sep. 04.17, 9.6, 6' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain)
2019 Sep. 04.06, 13.5, 0.6' (D. Buczynski, Tarbatness I81, 0.35-m Schmidt-Cassegrain)
2019 Sep. 03.73, 13.3, 1.5' (C. Wyatt, 0.4-m Newtonian reflector)
2019 Sep. 03.14, 12.9, 0.8' (K. Hills, 0.5-m Newtonian reflector)
2019 Sep. 03.09, 13.5, 2' (S. Fritsche, 0.1-m refractor; 0.04-deg tail in p.a. 239)
2019 Sep. 02.45, 13.4, 2.7' (T. Lehmann, 0.106-m refractor; 0.05-deg tail in p.a. 236)
2019 Sep. 02.45, 13.4, 2.7' (T. Lehmann, 0.106-m refractor; 0.05-deg tail in p.a. 236)
2019 Sep. 02.12, 13.2, -- (P. Carson, Southend on Sea, Essex, UK, 0.315-m Cassegrain reflector)
2019 Sep. 02.06, 13.2, 0.5' (C. Harder, Jeersdorf, Germany f, 0.531-m Newtonian reflector)
2019 Sep. 01.46, 13.4, 1.7' (R. Ramlow, 0.106-m refractor; 2.2' tail in p.a. 231)
2019 Sep. 01.11, 13.5, 2.2' (S. Fritsche, 0.1-m refractor; 0.03-deg tail in p.a. 238)
2019 Sep. 01.08, 13.5, 2' (T. Lehmann, 0.2-m Newtonian reflector; 2.4' tail in p.a. 228)
2019 Sep. 01.08, 13.5, 2' (T. Lehmann, 0.2-m Newtonian reflector; 2.4' tail in p.a. 228)
2019 Sep. 01.04, 13.0, 1.3' (J. Cerny, 0.355-m Newtonian reflector)
2019 Aug. 31.15, 13.6, 0.75' (N. James, 0.28-m Schmidt-Cassegrain)
2019 Aug. 31.12, 13.6, -- (P. Carson, Southend on Sea, Essex, UK, 0.315-m Cassegrain reflector)
2019 Aug. 31.10, 13.5, 2.1' (S. Fritsche, 0.1-m refractor; 0.04-deg tail in p.a. 237)
2019 Aug. 31.05, 12.4, 1' (J. Cerny, 0.355-m Newtonian reflector)
2019 Aug. 29.45, 13.6, 1.9' (T. Lehmann, 0.51-m Newtonian reflector; 0.05-deg tail in p.a. 235)
2019 Aug. 29.45, 13.6, 1.9' (T. Lehmann, 0.51-m Newtonian reflector; 0.05-deg tail in p.a. 235)
2019 Aug. 29.21, 13.7, 0.8' (M. Masek, 0.25-m Schmidt-Cassegrain)
2019 Aug. 29.21, 14.1, 0.8' (M. Masek, 0.25-m Schmidt-Cassegrain; 2.0' tail in p.a. 236)
2019 Aug. 28.75, 13.8, 0.7' (C. Wyatt, 0.4-m Newtonian reflector)
2019 Aug. 28.14, 8.8, 8' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain)
2019 Aug. 28.11, 13.6, 2' (S. Fritsche, 0.1-m refractor; 0.02-deg tail in p.a. 235)
2019 Aug. 28.04, 13.8, 0.8' (J. Cerny, 0.5-m Newtonian reflector)
2019 Aug. 27.09, 13.7, 0.75' (N. James, 0.28-m Schmidt-Cassegrain)
2019 Aug. 26.10, 13.7, 1.7' (S. Fritsche, 0.1-m refractor; 0.02-deg tail in p.a. 235)
2019 Aug. 23.11, 13.7, -- (P. Carson, Southend on Sea, Essex, UK, 0.315-m Cassegrain reflector; 2.5' tail)
2019 Aug. 23.09, 13.8, 1.3' (S. Fritsche, 0.1-m refractor; 0.02-deg tail in p.a. 237)
2019 Aug. 21.45, 13.9, 1.5' (T. Lehmann, 0.51-m Newtonian reflector; 2.1' tail in p.a. 236)
2019 Aug. 21.45, 13.9, 1.5' (T. Lehmann, 0.51-m Newtonian reflector; 2.1' tail in p.a. 236)

C/2018 A3 (ATLAS)
Total-magnitude and coma-diameter estimates:
2019 Sep. 10.08, 16.1, 0.2' (K. Hills, 0.5-m Newtonian reflector)

C/2018 A6 (Gibbs)
Total-magnitude and coma-diameter estimates:
2019 Sep. 05.71, 13.9, 0.5' (C. Wyatt, 0.4-m Newtonian reflector)
2019 Sep. 03.76, 13.8, 0.9' (C. Wyatt, 0.4-m Newtonian reflector)
2019 Aug. 28.76, 14.0, 0.5' (C. Wyatt, 0.4-m Newtonian reflector)
2019 Aug. 25.50, 13.4, 1' (T. Karhula, Wicherina, Western Australia, 0.254-m Newtonian reflector)

C/2018 L2 (ATLAS)
Total-magnitude and coma-diameter estimates:
2019 Sep. 10.10, 17.7, 0.2' (K. Hills, 0.5-m Newtonian reflector)

C/2018 N2 (ASASSN)
Total-magnitude and coma-diameter estimates:
2019 Sep. 11.09, 11.6, 1.5' (M. Meyer, 0.254-m Newtonian reflector)
2019 Sep. 11.09, 10.8, 2' (C. Harder, Jeersdorf, Germany h, 0.3-m Newtonian reflector)
2019 Sep. 11.04, 11.7, 1.3' (M. Kwinta, Krakow, 0.185-m Newtonian reflector)
2019 Sep. 11.01, 12.6, 1.5' (M. Paradowski, Lublin, Poland, 0.054-m reflector; 0.04-deg tail in p.a. 190)
2019 Sep. 10.09, 11.6, 2.1' (C. Harder, Jeersdorf, Germany h, 0.3-m Newtonian reflector)
2019 Sep. 09.70, 11.9, 1.5' (S. Yoshida, 0.4-m Newtonian reflector)
2019 Sep. 09.00, 11.5, 1.2' (K. Hills, 0.5-m Newtonian reflector)
2019 Sep. 08.99, 12.1, 2' (P. Guzik, 0.326-m Newtonian reflector; 0.05-deg tail in p.a. 180)
2019 Sep. 08.97, 11.8, 1.3' (M. Kwinta, Krakow, 0.185-m Newtonian reflector)
2019 Sep. 08.17, 12.4, 1.4' (M. Masek, 0.25-m Schmidt-Cassegrain; 7.7' tail in p.a. 187)
2019 Sep. 08.16, 12.7, 1.4' (M. Masek, 0.25-m Schmidt-Cassegrain; 5.0' tail in p.a. 189)
2019 Sep. 08.13, 11.8, 1.2' (C. Harder, Jeersdorf, Germany h, 0.3-m Newtonian reflector)
2019 Sep. 07.94, 12.5, 1.12' (D. Buczynski, tarbatness I81, 0.35-m Schmidt-Cassegrain)
2019 Sep. 07.27, 12.1, 1' (M. Goiato, 0.22-m Newtonian reflector)
2019 Sep. 07.05, 11.5, 1.2' (C. Harder, Jeersdorf, Germany h, 0.3-m Newtonian reflector; 1.8' tail in p.a. 180)
2019 Sep. 06.08, 11.6, 1.5' (M. Meyer, 0.254-m Newtonian reflector)
2019 Sep. 06.07, 11.7, 1.5' (C. Harder, Jeersdorf, Germany h, 0.3-m Newtonian reflector)
2019 Sep. 05.73, 12.6, 1.2' (C. Wyatt, 0.4-m Newtonian reflector; 1.5' tail in p.a. 185)
2019 Sep. 05.22, 12.5, 1.4' (M. Masek, 0.25-m Schmidt-Cassegrain; 6.1' tail in p.a. 187)
2019 Sep. 05.21, 12.8, 1.4' (M. Masek, 0.25-m Schmidt-Cassegrain; 4.6' tail in p.a. 190)
2019 Sep. 05.06, 11.5, 1.3' (C. Harder, Jeersdorf, Germany h, 96x300 binoculars)
2019 Sep. 05.02, 12.1, 1.2' (M. Kwinta, Krakow, 0.185-m Newtonian reflector)
2019 Sep. 04.98, 12.3, 4.3' (S. Fritsche, 0.1-m refractor; 0.12-deg tail in p.a. 190)
2019 Sep. 04.95, 12.3, 1.5' (P. Guzik, 0.326-m Newtonian reflector)
2019 Sep. 04.02, 11.7, 1.5' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain)
2019 Sep. 04.01, 12.3, 1.3' (D. Buczynski, Tarbatness I81, 0.35-m Schmidt-Cassegrain)
2019 Sep. 03.96, 12.3, 0.8' (M. Masek, 0.3-m Newtonian reflector)
2019 Sep. 03.92, 12.8, 1.5' (J. Warell, Lindby Observatory (K60), Skurup, Sweden , 0.25-m Newtonian reflector)
2019 Sep. 03.72, 12.3, 1' (C. Wyatt, 0.4-m Newtonian reflector; 3.9' tail in p.a. 188)
2019 Sep. 03.09, 12.0, 2' (M. Meyer, 0.254-m Newtonian reflector)
2019 Sep. 03.04, 12.1, 6' (S. Fritsche, 0.1-m refractor; 0.15-deg tail in p.a. 187)
2019 Sep. 02.08, 11.9, 2' (K. Hills, 0.5-m Newtonian reflector)
2019 Sep. 02.02, 11.4, 1.2' (C. Harder, Jeersdorf, Germany f, 0.531-m Newtonian reflector; 2.0' tail in p.a. 200)
2019 Sep. 01.07, 12.3, 4.8' (S. Fritsche, 0.1-m refractor; 0.1-deg tail in p.a. 191)
2019 Sep. 01.03, 12.4, 2.3' (J. Cerny, 0.355-m Newtonian reflector)
2019 Sep. 01.01, 12.7, 1.79' (M. Paradowski, Dąbrowa, Poland, 0.05-m reflector)
2019 Aug. 31.13, 12.3, 1.2' (W. Kutschera, 0.54-m Newtonian reflector; 0.02-deg tail)
2019 Aug. 31.09, 12.4, 3.2' (T. Lehmann, 0.2-m Newtonian reflector; 0.19-deg tail in p.a. 189)
2019 Aug. 31.09, 12.4, 3.2' (T. Lehmann, 0.2-m Newtonian reflector; 0.19-deg tail in p.a. 189)
2019 Aug. 31.06, 12.6, 3.7' (M. Lostak, 0.2-m Newtonian reflector)
2019 Aug. 31.06, 12.3, 4.6' (S. Fritsche, 0.1-m refractor; 0.07-deg tail in p.a. 190)
2019 Aug. 31.03, 12.5, 1.6' (J. Cerny, 0.355-m Newtonian reflector)
2019 Aug. 31.02, 12.0, 1.6' (M. Meyer, 0.254-m Newtonian reflector)
2019 Aug. 30.96, 11.5, 1.7' (C. Harder, Jeersdorf, Germany f, 0.531-m Newtonian reflector)
2019 Aug. 28.75, 12.3, 1' (C. Wyatt, 0.4-m Newtonian reflector)
2019 Aug. 28.17, 12.6, 1.5' (M. Masek, 0.25-m Schmidt-Cassegrain; 6.1' tail in p.a. 188)
2019 Aug. 28.17, 13.0, 1.5' (M. Masek, 0.25-m Schmidt-Cassegrain; 5.6' tail in p.a. 188)
2019 Aug. 28.03, 12.4, 4' (S. Fritsche, 0.1-m refractor; 0.05-deg tail in p.a. 195)
2019 Aug. 27.99, 12.4, 1.4' (J. Bohusz, Myślin Poland, 0.38-m Newtonian reflector)
2019 Aug. 27.94, 12.9, 3.7' (M. Lostak, 0.2-m Newtonian reflector)
2019 Aug. 27.71, 12.1, 2.1' (T. Karhula, Wicherina, Western Australia, 0.254-m Newtonian reflector)
2019 Aug. 26.99, 11.6, 0.7' (W. Hasubick, 0.44-m Newtonian reflector)
2019 Aug. 26.11, 12.6, 2.7' (T. Lehmann, 0.2-m Newtonian reflector; 0.15-deg tail in p.a. 191)
2019 Aug. 26.11, 12.6, 2.7' (T. Lehmann, 0.2-m Newtonian reflector; 0.15-deg tail in p.a. 191)
2019 Aug. 26.05, 11.7, 1.3' (K. Hills, 0.5-m Newtonian reflector)
2019 Aug. 26.02, 12.5, 3.8' (S. Fritsche, 0.1-m refractor; 0.07-deg tail in p.a. 192)
2019 Aug. 25.45, 12.5, 2.4' (R. Ramlow, 0.106-m refractor; 7.5' tail in p.a. 193)

C/2018 U1 (Lemmon)
Total-magnitude and coma-diameter estimates:
2019 Sep. 03.00, 17.4, 0.3' (K. Hills, 0.5-m Newtonian reflector)
2019 Aug. 27.00, 18.0, 0.2' (K. Hills, 0.5-m Newtonian reflector)

C/2018 W2 (Africano)
Total-magnitude and coma-diameter estimates:
2019 Sep. 18.81, 8.3, 7' (C. Harder, Jeersdorf, Germany f, 0.198-m Newtonian reflector)
2019 Sep. 11.07, 9.8, 4.5' (M. Meyer, 0.254-m Newtonian reflector)
2019 Sep. 11.07, 8.7, 9' (C. Harder, Jeersdorf, Germany h, 0.198-m Newtonian reflector)
2019 Sep. 11.06, 10.0, 5' (A. Scholten, Eerbeek, 0.2-m Newtonian reflector)
2019 Sep. 11.06, 9.7, 4' (M. Kwinta, Krakow, 0.185-m Newtonian reflector)
2019 Sep. 10.08, 9.0, 7' (C. Harder, Jeersdorf, Germany h, 0.198-m Newtonian reflector)
2019 Sep. 09.69, 9.6, 6' (S. Yoshida, 0.4-m Newtonian reflector)
2019 Sep. 09.02, 10.0, 5' (G. van Buitenen, Dordrecht, NL, 0.3-m Newtonian reflector)
2019 Sep. 08.98, 9.5, 6' (P. Guzik, 10x50 binoculars)
2019 Sep. 08.95, 9.8, 3.8' (M. Kwinta, Krakow, 0.185-m Newtonian reflector)
2019 Sep. 08.21, 10.1, 7.5' (M. Masek, 0.25-m Schmidt-Cassegrain)
2019 Sep. 08.21, 9.4, 10' (M. Masek, 0.25-m Schmidt-Cassegrain)
2019 Sep. 08.20, 11.1, 7.6' (K. Hills, 0.5-m Newtonian reflector)
2019 Sep. 07.06, 9.7, 8' (C. Harder, Jeersdorf, Germany h, 0.3-m Newtonian reflector)
2019 Sep. 07.05, 9.9, 3.7' (M. Collins, Everton, 0.254-m Schmidt-Cassegrain)
2019 Sep. 07.02, 10.4, 4.51' (D. Buczynski, tarbatness I81, 0.35-m Schmidt-Cassegrain)
2019 Sep. 06.08, 10.5, 4' (A. Scholten, Eerbeek, 0.2-m Newtonian reflector)
2019 Sep. 06.07, 10.1, 3.5' (M. Meyer, 0.254-m Newtonian reflector)
2019 Sep. 06.05, 9.8, 5.3' (C. Harder, Jeersdorf, Germany h, 0.3-m Newtonian reflector)
2019 Sep. 05.95, 9.0, 3.4' (M. Collins, Everton, 0.254-m Schmidt-Cassegrain)
2019 Sep. 05.74, 10.7, 3.9' (C. Wyatt, 0.4-m Newtonian reflector)
2019 Sep. 05.05, 9.5, 5' (C. Harder, Jeersdorf, Germany h, 0.3-m Newtonian reflector)
2019 Sep. 05.00, 10.1, 3.3' (M. Kwinta, Krakow, 0.185-m Newtonian reflector)
2019 Sep. 04.93, 9.8, 5' (P. Guzik, 25x100 binoculars)
2019 Sep. 04.90, 9.6, 18' (S. Fritsche, 0.1-m refractor)
2019 Sep. 04.83, 10.9, 8.2' (M. Lostak, 0.2-m Newtonian reflector)
2019 Sep. 04.10, 9.8, 6' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain)
2019 Sep. 04.02, 9.2, 6' (U. Pilz, 16x70 binoculars)
2019 Sep. 03.98, 10.6, 4.5' (D. Buczynski, Tarbatness I81, 0.35-m Schmidt-Cassegrain)
2019 Sep. 03.91, 10.8, 2.5' (J. Warell, Lindby Observatory (K60), Skurup, Sweden , 0.25-m Newtonian reflector)
2019 Sep. 03.74, 10.8, 3.6' (C. Wyatt, 0.4-m Newtonian reflector)
2019 Sep. 03.07, 10.0, 4' (M. Meyer, 0.254-m Newtonian reflector)
2019 Sep. 02.92, 9.8, 24' (S. Fritsche, 0.1-m refractor)
2019 Sep. 02.85, 10.7, 2.7' (C. Harder, Jeersdorf, Germany f, 0.531-m Newtonian reflector)
2019 Sep. 02.19, 11.1, 4' (M. Masek, 0.25-m Schmidt-Cassegrain; 2.9' tail in p.a. 256)
2019 Sep. 02.19, 10.3, 7' (M. Masek, 0.25-m Schmidt-Cassegrain)
2019 Sep. 02.05, 10.2, 3.7' (M. Collins, Everton, 0.254-m Schmidt-Cassegrain)
2019 Sep. 02.02, 10.1, -- (P. Carson, Southend on Sea, Essex, UK, 0.315-m Cassegrain reflector)
2019 Sep. 01.99, 10.2, 2.8' (C. Harder, Jeersdorf, Germany f, 0.531-m Newtonian reflector)
2019 Sep. 01.97, 10.6, 7.14' (N. James, 0.28-m Schmidt-Cassegrain)
2019 Sep. 01.90, 10.2, 2.5' (M. Kwinta, Kudlacze, 0.185-m Newtonian reflector)
2019 Sep. 01.24, 11.3, 4.9' (K. Hills, 0.5-m Newtonian reflector)
2019 Sep. 01.08, 10.2, 2.5' (M. Kwinta, Krakow, 0.185-m Newtonian reflector)
2019 Sep. 01.00, 10.9, 6.7' (J. Cerny, 0.355-m Newtonian reflector)
2019 Aug. 31.98, 10.2, 7' (G. Scheerle, 0.235-m Schmidt-Cassegrain)
2019 Aug. 31.98, - , -- (G. Scheerle, 9x63 binoculars)
2019 Aug. 31.96, 10.0, 8.94' (M. Paradowski, Dąbrowa, Poland, 0.05-m reflector)
2019 Aug. 31.94, 9.9, 22' (S. Fritsche, 0.1-m refractor)
2019 Aug. 31.89, 10.3, 3.5' (C. Harder, Jeersdorf, Germany f, 0.531-m Newtonian reflector)
2019 Aug. 31.11, 10.8, 5.83' (N. James, 0.28-m Schmidt-Cassegrain)
2019 Aug. 31.06, 10.8, 2' (A. Scholten, Eerbeek, 0.2-m Newtonian reflector)
2019 Aug. 31.02, 10.3, -- (P. Carson, Southend on Sea, Essex, UK, 0.315-m Cassegrain reflector)
2019 Aug. 31.02, 10.0, 12' (T. Lehmann, 0.2-m Newtonian reflector; 1.4' tail in p.a. 259)
2019 Aug. 31.02, 10.0, 12' (T. Lehmann, 0.2-m Newtonian reflector; 1.4' tail in p.a. 259)
2019 Aug. 31.00, 10.5, 2.5' (M. Meyer, 0.254-m Newtonian reflector)
2019 Aug. 31.00, 11.4, 7.3' (M. Lostak, 0.2-m Newtonian reflector)
2019 Aug. 31.00, 10.5, 7.2' (J. Cerny, 0.355-m Newtonian reflector)
2019 Aug. 30.93, 9.4, 15' (S. Fritsche, 0.1-m refractor)
2019 Aug. 30.90, 10.3, 2.5' (C. Harder, Jeersdorf, Germany f, 0.531-m Newtonian reflector)
2019 Aug. 30.47, 9.8, 16' (T. Lehmann, 0.106-m refractor; 2.3' tail in p.a. 261)
2019 Aug. 30.47, 9.8, 16' (T. Lehmann, 0.106-m refractor; 2.3' tail in p.a. 261)
2019 Aug. 30.01, 11.2, 1.1' (W. Hasubick, 0.44-m Newtonian reflector)
2019 Aug. 29.98, 10.5, 4' (P. Guzik, 25x100 binoculars)
2019 Aug. 29.91, 10.6, 2.5' (C. Harder, Jeersdorf, Germany f, 0.531-m Newtonian reflector)
2019 Aug. 29.88, 10.1, 2.6' (M. Kwinta, Krakow, 0.185-m Newtonian reflector)
2019 Aug. 29.18, 11.5, 3' (M. Masek, 0.25-m Schmidt-Cassegrain; 2.3' tail in p.a. 254)
2019 Aug. 29.18, 10.6, 6' (M. Masek, 0.25-m Schmidt-Cassegrain)
2019 Aug. 28.97, 10.2, 2.6' (M. Kwinta, Krakow, 0.185-m Newtonian reflector)
2019 Aug. 28.90, 10.4, 9.1' (J. Cerny, 0.355-m Newtonian reflector)
2019 Aug. 28.05, 9.9, 5' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain)
2019 Aug. 28.04, 10.1, 4.5' (M. Meyer, 0.12-m refractor)
2019 Aug. 27.96, 10.5, 2.9' (J. Bohusz, Myślin Poland, 0.38-m Newtonian reflector)
2019 Aug. 27.94, 10.2, 2.3' (M. Kwinta, Krakow, 0.185-m Newtonian reflector)
2019 Aug. 27.91, 10.0, 17' (S. Fritsche, 0.1-m refractor)
2019 Aug. 27.90, 11.2, 3' (J. Cerny, 0.355-m Newtonian reflector)
2019 Aug. 27.87, 11.1, 5.9' (M. Lostak, 0.2-m Newtonian reflector)
2019 Aug. 27.44, [ 9.9, -- (S. Aguirre, Hermosillo, Sonora,Mex. , 0.15-m Schmidt-Cassegrain)
2019 Aug. 27.28, 10.1, 4' (C. Hergenrother, 30x125 binoculars)
2019 Aug. 27.15, 11.3, 5.2' (K. Hills, 0.5-m Newtonian reflector)
2019 Aug. 27.03, 10.3, 2.3' (M. Kwinta, Krakow, 0.185-m Newtonian reflector)
2019 Aug. 26.99, 10.4, 3.2' (J. Bohusz, Myślin Poland, 0.38-m Newtonian reflector)
2019 Aug. 26.96, 11.5, 3.57' (N. James, 0.28-m Schmidt-Cassegrain)
2019 Aug. 26.90, 10.2, 4' (M. Paradowski, Dąbrowa, Poland, 0.068-m refractor)
2019 Aug. 26.89, 10.4, 3.5' (C. Harder, Jeersdorf, Germany f, 0.531-m Newtonian reflector)
2019 Aug. 26.45, 10.0, 15' (T. Lehmann, 0.106-m refractor; 2.0' tail in p.a. 264)
2019 Aug. 26.45, 10.0, 15' (T. Lehmann, 0.106-m refractor; 2.0' tail in p.a. 264)
2019 Aug. 25.94, 10.0, 3' (M. Collins, Everton, 0.254-m Schmidt-Cassegrain)
2019 Aug. 25.94, 10.4, 15' (S. Fritsche, 0.1-m refractor)
2019 Aug. 25.91, 10.3, 2' (M. Kwinta, Krakow, 0.185-m Newtonian reflector)
2019 Aug. 25.90, 10.4, 4' (M. Paradowski, Dąbrowa, Poland, 0.068-m refractor)
2019 Aug. 25.89, 10.7, 5.3' (M. Paradowski, Dąbrowa, Poland, 0.05-m reflector)
2019 Aug. 25.45, 10.2, 11.6' (R. Ramlow, 0.106-m refractor)
2019 Aug. 25.30, 10.1, 4' (C. Hergenrother, 30x125 binoculars)
2019 Aug. 25.04, 10.3, 2.3' (M. Collins, Everton, 0.254-m Schmidt-Cassegrain)
2019 Aug. 24.96, 10.5, 2.1' (J. Bohusz, Myślin Poland, 0.38-m Newtonian reflector)
2019 Aug. 24.90, 10.5, 2' (M. Kwinta, Krakow, 0.185-m Newtonian reflector)
2019 Aug. 24.90, 10.5, 3.3' (C. Harder, Jeersdorf, Germany f, 0.531-m Newtonian reflector)
2019 Aug. 24.01, 10.2, 14' (S. Fritsche, 0.1-m refractor)
2019 Aug. 23.92, 9.8, 2.7' (M. Collins, Everton, 0.254-m Schmidt-Cassegrain)
2019 Aug. 23.90, 10.5, 3.3' (C. Harder, Westerholz-Bullerberg/ Germany, 0.531-m Newtonian reflector)
2019 Aug. 23.90, 10.4, 11' (T. Lehmann, 0.2-m Newtonian reflector; 1.5' tail in p.a. 261)
2019 Aug. 23.90, 10.4, 11' (T. Lehmann, 0.2-m Newtonian reflector; 1.5' tail in p.a. 261)
2019 Aug. 23.89, 10.6, 2' (M. Meyer, 0.254-m Newtonian reflector)
2019 Aug. 23.87, 10.6, 2' (M. Kwinta, Glanów, 0.25-m Newtonian reflector)
2019 Aug. 23.10, 11.1, -- (P. Carson, Southend on Sea, Essex, UK, 0.315-m Cassegrain reflector)
2019 Aug. 23.01, 10.4, 14' (S. Fritsche, 0.1-m refractor)
2019 Aug. 22.98, 10.8, 3.5' (G. Scheerle, 0.235-m Schmidt-Cassegrain)
2019 Aug. 22.90, 9.8, 5' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain)
2019 Aug. 22.90, 10.4, 11' (T. Lehmann, 0.2-m Newtonian reflector; 1.0' tail in p.a. 253)
2019 Aug. 22.90, 10.4, 11' (T. Lehmann, 0.2-m Newtonian reflector; 1.0' tail in p.a. 253)
2019 Aug. 22.88, 10.6, 2.5' (C. Harder, Jeersdorf, Germany f, 0.3-m Newtonian reflector)
2019 Aug. 20.05, 11.0, -- (P. Carson, Southend on Sea, Essex, UK, 0.315-m Cassegrain reflector)

C/2018 Y1 (Iwamoto)
Total-magnitude and coma-diameter estimates:
2019 Sep. 01.21, 17.4, 0.3' (M. Masek, 0.25-m Schmidt-Cassegrain)
2019 Sep. 01.20, 17.1, 0.3' (M. Masek, 0.25-m Schmidt-Cassegrain)
2019 Aug. 28.22, 16.0, 0.3' (K. Hills, 0.5-m Newtonian reflector)
2019 Aug. 23.10, 16.9, 1.3' (T. Lehmann, 0.2-m Newtonian reflector; 0.9' tail in p.a. 237)
2019 Aug. 23.10, 16.9, 1.3' (T. Lehmann, 0.2-m Newtonian reflector; 0.9' tail in p.a. 237)

C/2019 A9 (PANSTARRS)
Total-magnitude and coma-diameter estimates:
2019 Sep. 03.77, 11.5, 1.9' (C. Wyatt, 0.4-m Newtonian reflector)
2019 Sep. 02.79, 10.9, 10' (T. Lehmann, 0.106-m refractor)
2019 Sep. 02.79, 10.9, 10' (T. Lehmann, 0.106-m refractor)
2019 Aug. 28.77, 12.3, 1' (C. Wyatt, 0.4-m Newtonian reflector)
2019 Aug. 25.80, 10.8, 11' (T. Lehmann, 0.106-m refractor)
2019 Aug. 25.80, 10.8, 11' (T. Lehmann, 0.106-m refractor)

C/2019 D1 (Flewelling)
Total-magnitude and coma-diameter estimates:
2019 Sep. 02.09, 18.2, 0.3' (K. Hills, 0.5-m Newtonian reflector)
2019 Aug. 28.01, 18.3, 0.2' (M. Masek, 0.25-m Schmidt-Cassegrain)
2019 Aug. 28.00, 18.1, 0.2' (M. Masek, 0.25-m Schmidt-Cassegrain; 0.1' tail in p.a. 219)
2019 Aug. 26.11, 16.6, 0.3' (K. Hills, 0.5-m Newtonian reflector)
2019 Aug. 24.05, 16.8, 1.1' (T. Lehmann, 0.2-m Newtonian reflector; 1.1' tail in p.a. 252)
2019 Aug. 24.05, 16.8, 1.1' (T. Lehmann, 0.2-m Newtonian reflector; 1.1' tail in p.a. 252)

C/2019 K4 (YE)
Total-magnitude and coma-diameter estimates:
2019 Sep. 05.02, 15.7, 1.4' (S. Fritsche, 0.1-m refractor)
2019 Sep. 02.14, 14.5, 0.6' (K. Hills, 0.5-m Newtonian reflector)
2019 Aug. 30.93, 16.7, 1.3' (M. Lostak, 0.2-m Newtonian reflector)
2019 Aug. 26.16, 15.7, 0.5' (K. Hills, 0.5-m Newtonian reflector)
2019 Aug. 23.95, 16.1, 1.3' (S. Fritsche, 0.1-m refractor; 0.01-deg tail in p.a. 256)

C/2019 K5 (YOUNG)
Total-magnitude and coma-diameter estimates:
2019 Sep. 10.09, 15.2, 0.6' (K. Hills, 0.5-m Newtonian reflector)
2019 Sep. 03.08, 14.9, 0.5' (K. Hills, 0.5-m Newtonian reflector)
2019 Aug. 28.07, 15.7, 1' (S. Fritsche, 0.1-m refractor; 0.01-deg tail in p.a. 263)
2019 Aug. 27.14, 14.8, 0.6' (K. Hills, 0.5-m Newtonian reflector)

C/2019 K7 (SMITH)
Total-magnitude and coma-diameter estimates:
2019 Aug. 29.06, 15.9, 0.3' (K. Hills, 0.5-m Newtonian reflector)
2019 Aug. 22.00, 15.3, 0.4' (K. Hills, 0.5-m Newtonian reflector)

C/2019 K8 (ATLAS)
Total-magnitude and coma-diameter estimates:
2019 Sep. 09.87, 18.7, 0.2' (K. Hills, 0.5-m Newtonian reflector)

C/2019 L3 (ATLAS)
Total-magnitude and coma-diameter estimates:
2019 Sep. 03.02, 17.9, 0.6' (T. Lehmann, 0.2-m Newtonian reflector)
2019 Sep. 03.02, 17.9, 0.6' (T. Lehmann, 0.2-m Newtonian reflector)
2019 Aug. 23.86, 17.5, 0.7' (S. Fritsche, 0.1-m refractor)

C/2019 M3 (ATLAS)
Total-magnitude and coma-diameter estimates:
2019 Sep. 02.03, 18.5, 0.2' (K. Hills, 0.5-m Newtonian reflector)
2019 Aug. 29.08, 18.8, 0.2' (K. Hills, 0.5-m Newtonian reflector)
2019 Aug. 26.02, 18.6, 0.2' (K. Hills, 0.5-m Newtonian reflector)

C/2019 N1 (ATLAS)
Total-magnitude and coma-diameter estimates:
2019 Sep. 04.84, 17.6, 0.8' (S. Fritsche, 0.1-m refractor)
2019 Sep. 02.00, 17.9, 0.2' (K. Hills, 0.5-m Newtonian reflector)
2019 Aug. 30.92, 17.0, 0.9' (T. Lehmann, 0.2-m Newtonian reflector; 0.3' tail in p.a. 75)
2019 Aug. 30.92, 17.0, 0.9' (T. Lehmann, 0.2-m Newtonian reflector; 0.3' tail in p.a. 75)
2019 Aug. 26.00, 17.5, 0.2' (K. Hills, 0.5-m Newtonian reflector)
2019 Aug. 22.99, 17.9, 0.8' (T. Lehmann, 0.2-m Newtonian reflector)
2019 Aug. 22.99, 17.9, 0.8' (T. Lehmann, 0.2-m Newtonian reflector)
2019 Aug. 22.94, 18.3, 0.7' (S. Fritsche, 0.1-m refractor)

P/2000 S4 (LINEAR-Spacewatch)
Total-magnitude and coma-diameter estimates:
2019 Aug. 26.03, 18.4, 0.2' (K. Hills, 0.5-m Newtonian reflector)

P/2010 U2 (Hill)
Total-magnitude and coma-diameter estimates:
2019 Sep. 03.13, 19.9, 0.2' (K. Hills, 0.5-m Newtonian reflector)

P/2014 U2 (Kowalski)
Total-magnitude and coma-diameter estimates:
2019 Sep. 10.04, 17.8, 0.2' (K. Hills, 0.5-m Newtonian reflector)
2019 Sep. 02.19, 17.3, 0.2' (K. Hills, 0.5-m Newtonian reflector)
2019 Aug. 26.15, 16.7, 0.2' (K. Hills, 0.5-m Newtonian reflector)

P/2019 M2
Total-magnitude and coma-diameter estimates:
2019 Sep. 04.01, 18.6, 0.2' (K. Hills, 0.5-m Newtonian reflector)
2019 Aug. 28.10, 18.4, 0.2' (K. Hills, 0.5-m Newtonian reflector)