Recent Comet Brightness Estimates

21P/Giacobini-Zinner
Total-magnitude and coma-diameter estimates:
2018 Sep. 21.10, 8.6, 5' (J. Cerny, 25x100 binoculars; 0.7-deg tail in p.a. 289)
2018 Sep. 21.08, 8.3, 4.5' (M. Kwinta, Krakow, 0.185-m Newtonian reflector; 14.0' tail in p.a. 283)
2018 Sep. 21.06, 7.7, 9.5' (A. Novichonok, With Nikon D5200 (55-mm lens), 0.01-m refractor; 26.0' tail in p.a. 274)
2018 Sep. 20.83, 8.0, 4' (P. Camilleri, 20x80 binoculars)
2018 Sep. 20.08, 7.8, 6.5' (C. Harder, Jeersdorf, Germany, 0.198-m Newtonian reflector; 21.0' tail in p.a. 281)
2018 Sep. 20.08, 8.1, 4.5' (M. Kwinta, Krakow, 0.185-m Newtonian reflector; 14.0' tail in p.a. 280)
2018 Sep. 19.87, 8.3, 4' (A. Pearce, Nedlands, 0.2-m Newtonian reflector)
2018 Sep. 19.82, 7.8, 4' (P. Camilleri, 20x80 binoculars)
2018 Sep. 19.42, 7.0, 20' (R. Ramlow, 0.106-m refractor; 80.0' tail in p.a. 280)
2018 Sep. 19.32, 7.4, 5' (W. Souza, 0.08-m refractor)
2018 Sep. 19.26, 7.3, 5' (W. Souza, 15x70 binoculars)
2018 Sep. 19.18, 7.6, 6' (J. Gonzalez Suarez, 10x50 binoculars; 0.6-deg tail in p.a. 280)
2018 Sep. 19.11, 7.8, 10' (A. Scholten, Eerbeek, 15x80 binoculars; 0.2-deg tail in p.a. 280)
2018 Sep. 19.08, 8.0, 4.2' (M. Kwinta, Krakow, 0.185-m Newtonian reflector; 11.0' tail in p.a. 280)
2018 Sep. 19.06, 8.7, 3.76' (D. Buczynski, tarbatness MPC I81, 0.35-m Schmidt-Cassegrain)
2018 Sep. 18.82, 7.4, 5' (P. Camilleri, 0.08-m refractor)
2018 Sep. 18.76, 8.5, 4.8' (C. Wyatt, 0.25-m Newtonian reflector; 23.0' tail in p.a. 280)
2018 Sep. 18.50, 7.3, 9' (C. Hergenrother, 10x50 binoculars)
2018 Sep. 18.45, 7.9, 19.18' (N. James, 0.106-m Ritchey-Chretien)
2018 Sep. 18.10, 8.1, 9.7' (J. Cerny, 25x100 binoculars; 1.3-deg tail in p.a. 274)
2018 Sep. 18.08, 7.9, 4.5' (M. Kwinta, Krakow, 0.185-m Newtonian reflector; 10.0' tail in p.a. 275)
2018 Sep. 17.71, 6.8, 13' (S. Yoshida, 0.07-m refractor)
2018 Sep. 17.70, 7.7, 8' (S. Yoshida, 0.4-m Newtonian reflector; 13.0' tail in p.a. 275)
2018 Sep. 17.48, 7.1, 9' (C. Hergenrother, 10x50 binoculars)
2018 Sep. 17.19, 8.5, 6.7' (N. Paul, Slooh, Canary Island (MPC - G40), 0.43-m Schmidt-Cassegrain)
2018 Sep. 17.11, 7.4, 10' (M. Meyer, 10x50 binoculars)
2018 Sep. 17.08, 7.8, 4.5' (M. Kwinta, Krakow, 0.185-m Newtonian reflector; 12.0' tail in p.a. 275)
2018 Sep. 16.83, 7.2, 5' (P. Camilleri, 0.08-m refractor)
2018 Sep. 16.67, 8.1, 6' (S. Yoshida, 0.4-m Newtonian reflector; 8.5' tail in p.a. 275)
2018 Sep. 16.67, 6.9, 11' (S. Yoshida, 0.07-m refractor)
2018 Sep. 16.48, 7.6, 6' (C. Morris, Dreamweaver Observatory, 20x80 binoculars)
2018 Sep. 16.13, 7.0, 10' (M. Meyer, 10x50 binoculars)
2018 Sep. 16.12, 7.5, 5.5' (C. Harder, Jeersdorf, Germany, 0.15-m Newtonian reflector; 22.0' tail in p.a. 273)
2018 Sep. 16.07, 7.7, 4.2' (M. Kwinta, Krakow, 0.185-m Newtonian reflector; 10.0' tail in p.a. 275)
2018 Sep. 15.86, 8.1, 6' (A. Pearce, Nedlands, 0.1-m Newtonian reflector)
2018 Sep. 15.83, 7.1, 6' (P. Camilleri, 20x80 binoculars)
2018 Sep. 15.11, 7.6, 8.8' (M. Collins, Everton, 0.103-m refractor; 12.2' tail in p.a. 275)
2018 Sep. 15.11, 8.5, 4.13' (D. Buczynski, tarbatness mpc I81, 0.35-m Schmidt-Cassegrain)
2018 Sep. 15.04, 7.8, 2' (P. Jordanov, Dimitrovgrad-Brod, Bulgaria, 0.15-m Newtonian reflector; 6.0' tail in p.a. 275)
2018 Sep. 14.87, 8.1, 5' (A. Pearce, Nedlands, 0.1-m Newtonian reflector)
2018 Sep. 14.84, 7.0, 5' (P. Camilleri, 0.08-m refractor)
2018 Sep. 14.48, 7.0, 9' (C. Hergenrother, 10x50 binoculars)
2018 Sep. 14.47, 7.3, 7' (C. Morris, Dreamweaver Observatory, 20x80 binoculars)
2018 Sep. 14.47, 7.2, 22' (T. Lehmann, 0.106-m refractor; 1.8-deg tail in p.a. 278)
2018 Sep. 14.39, 7.8, 19.93' (N. James, 0.106-m Ritchey-Chretien)
2018 Sep. 14.08, 7.7, 8' (A. Scholten, Eerbeek, 15x80 binoculars; 0.1-deg tail in p.a. 275)
2018 Sep. 13.97, 7.9, 3.5' (A. Tsvetkov, Zavolzhye, 0.05-m reflector)
2018 Sep. 13.83, 7.0, 4' (P. Camilleri, 20x80 binoculars)
2018 Sep. 13.08, 8.5, 4.6' (M. Collins, Everton, 0.254-m Schmidt-Cassegrain; 9.5' tail in p.a. 273)
2018 Sep. 13.07, 7.5, 3.8' (M. Kwinta, Krakow, 0.185-m Newtonian reflector)
2018 Sep. 13.05, 7.3, 8' (P. Guzik, 10x50 binoculars; 1.2-deg tail in p.a. 280)
2018 Sep. 12.82, 7.0, 5' (P. Camilleri, 20x80 binoculars)
2018 Sep. 12.47, 7.0, 8' (C. Hergenrother, 10x50 binoculars)
2018 Sep. 12.47, 7.8, 17.67' (N. James, 0.106-m Ritchey-Chretien)
2018 Sep. 12.46, 6.8, 20' (R. Ramlow, 0.106-m refractor; 79.0' tail in p.a. 276)
2018 Sep. 12.42, 7.3, 3.5' (S. Aguirre, Son, Mex., 0.15-m Schmidt-Cassegrain)
2018 Sep. 12.20, 7.8, 6.5' (N. Paul, Slooh, Canary Island (MPC - G40), 0.43-m Schmidt-Cassegrain)
2018 Sep. 12.17, 7.1, 10' (A. Kammerer, Karlsruhe, 9x63 binoculars)
2018 Sep. 12.13, 7.2, 10' (M. Meyer, 10x50 binoculars)
2018 Sep. 12.12, 7.1, 28' (T. Lehmann, 0.075-m reflector; 2.7-deg tail in p.a. 276)
2018 Sep. 12.09, 7.8, 6.8' (J. Cerny, 25x100 binoculars; 1.5-deg tail in p.a. 281)
2018 Sep. 12.07, 7.5, 3.8' (M. Kwinta, Krakow, 0.185-m Newtonian reflector)
2018 Sep. 12.05, 7.6, 9' (J. Fraser, Alness, Scotland., 20x60 binoculars)
2018 Sep. 11.84, 7.0, 5' (P. Camilleri, 0.08-m refractor)
2018 Sep. 11.43, 7.1, 9' (C. Hergenrother, 10x50 binoculars)
2018 Sep. 11.34, 7.3, 6' (M. Goiato, 20x100 binoculars; 15.0' tail in p.a. 270)
2018 Sep. 11.12, 8.9, 3' (M. Collins, Everton, 0.254-m Schmidt-Cassegrain; 12.6' tail in p.a. 289)
2018 Sep. 11.07, 6.6, 18' (M. Paradowski, Lublin, Poland, 0.034-m reflector; 1.54-deg tail in p.a. 274)
2018 Sep. 11.06, 7.6, 3.8' (M. Kwinta, Krakow, 0.185-m Newtonian reflector)
2018 Sep. 11.00, 8.3, 6.7' (D. Bamberger, 0.254-m Ritchey-Chretien; 8.8' tail in p.a. 273)
2018 Sep. 10.88, 7.5, 6' (A. Novichonok, ght blue zone (2016), 0.08-m refractor; 0.15-deg tail in p.a. 280)
2018 Sep. 10.81, 7.2, 4' (P. Camilleri, 0.08-m refractor)
2018 Sep. 10.16, 7.2, 7' (J. Gonzalez Suarez, 10x50 binoculars; 2.1-deg tail in p.a. 280)
2018 Sep. 10.10, 7.6, 7.9' (J. Cerny, 25x100 binoculars; 0.8-deg tail in p.a. 280)
2018 Sep. 10.04, 7.6, 4' (M. Kwinta, Krakow, 0.185-m Newtonian reflector)
2018 Sep. 09.97, 7.5, 11.5' (A. Novichonok, With Nikon D5200 (56-mm lens), 0.013-m refractor; 1.4' tail in p.a. 278)
2018 Sep. 09.95, 7.3, -- (G. van Buitenen, Rendeux, BE, 10x50 binoculars)
2018 Sep. 09.92, 7.3, 7' (A. Novichonok, 0.08-m refractor; 0.5-deg tail in p.a. 280)
2018 Sep. 09.78, 8.0, 4.2' (C. Wyatt, 0.25-m Newtonian reflector; 19.0' tail in p.a. 282)
2018 Sep. 09.48, 7.3, 7' (C. Morris, Dreamweaver Observatory, 20x80 binoculars; 2.0-deg tail in p.a. 280)
2018 Sep. 09.33, 7.2, 6' (M. Goiato, 20x100 binoculars; 15.0' tail in p.a. 270)
2018 Sep. 09.01, 7.6, 3.8' (M. Kwinta, Krakow, 0.185-m Newtonian reflector)
2018 Sep. 09.00, 8.0, 4.3' (D. Buczynski, tarbatness MPC I81, 0.35-m Schmidt-Cassegrain)
2018 Sep. 08.98, 7.4, 7' (A. Novichonok, 0.08-m refractor; 0.5-deg tail in p.a. 280)
2018 Sep. 08.97, 7.1, 5' (T. Karhula, Bifrost Observatory, Mariestad, Sweden, 0.12-m refractor; 0.3-deg tail in p.a. 275)
2018 Sep. 08.89, 9.4, 3' (T. Csorgei, Blahova, 0.28-m Schmidt-Cassegrain)
2018 Sep. 08.27, 7.3, 5' (W. Souza, 15x70 binoculars)
2018 Sep. 08.21, 7.0, 9.5' (K. Hills, 0.5-m Newtonian reflector)
2018 Sep. 08.19, 7.7, 6.7' (N. Paul, Slooh, Canary Island (MPC - G40), 0.43-m Schmidt-Cassegrain)
2018 Sep. 08.10, 7.3, 8.5' (M. Meyer, 10x50 binoculars)
2018 Sep. 08.10, 7.9, 6' (D. Swan, Tynemouth, UK, 0.2-m Schmidt-Cassegrain)
2018 Sep. 08.10, 7.0, 29' (T. Lehmann, 0.075-m reflector; 2.2-deg tail in p.a. 275)
2018 Sep. 08.08, 7.5, 8.5' (C. Harder, Jeersdorf, Germany, 0.15-m Newtonian reflector; 25.0' tail in p.a. 280)
2018 Sep. 08.08, 7.3, 6' (C. Labordena, La Serra, 0.15-m Newtonian reflector; 20.0-deg tail)
2018 Sep. 08.07, 7.2, 6' (C. Labordena, La Serra, 11x80 binoculars; 10.0-deg tail)
2018 Sep. 08.04, 7.1, 10' (A. Scholten, Eerbeek, 15x80 binoculars; 0.3-deg tail in p.a. 270)
2018 Sep. 08.01, 7.3, 8' (G. van Buitenen, Rendeux, BE, 10x50 binoculars)
2018 Sep. 08.01, 7.5, 4' (M. Kwinta, Krakow, 0.185-m Newtonian reflector)
2018 Sep. 07.95, 7.6, 4' (A. Tsvetkov, Zavolzhye, 0.05-m reflector)
2018 Sep. 07.83, 7.0, 5' (P. Camilleri, 20x80 binoculars)
2018 Sep. 07.41, 7.1, 8' (C. Hergenrother, 10x50 binoculars)
2018 Sep. 07.41, 7.6, 3' (S. Aguirre, Son, Mex., 0.1-m refractor)
2018 Sep. 07.10, 7.8, 7.4' (J. Cerny, 25x100 binoculars; 0.6-deg tail in p.a. 279)
2018 Sep. 07.07, 7.5, 4' (L. Entwisle, Elland,West Yorks, 11x70 binoculars)
2018 Sep. 06.99, 7.6, 3' (M. Kwinta, Krakow, 0.185-m Newtonian reflector)
2018 Sep. 06.83, 7.0, 5' (P. Camilleri, 0.08-m refractor)
2018 Sep. 06.15, 7.7, 3' (M. Collins, Everton, 0.254-m Schmidt-Cassegrain; 11.0' tail in p.a. 267)
2018 Sep. 06.08, 7.4, 4' (J. Fraser, Alness, Scotland., 20x60 binoculars)
2018 Sep. 06.02, 8.3, 3.9' (D. Buczynski, Tarbatness MPC I81, 0.35-m Schmidt-Cassegrain)
2018 Sep. 05.96, 7.0, 29' (T. Lehmann, 0.075-m reflector; 1.4-deg tail in p.a. 275)
2018 Sep. 05.95, 7.6, 3' (M. Kwinta, Krakow, 0.185-m Newtonian reflector)
2018 Sep. 05.93, 7.6, 4' (J. Warell, Lindby Observatory (K60), Skurup, Sweden , 20x100 binoculars; 15.0' tail in p.a. 275)
2018 Sep. 05.92, 7.1, 7' (M. Reszelski, Szamotuly, 25x100 binoculars)
2018 Sep. 05.88, 7.5, 25' (J. Konecny, Hlivice, 25x100 binoculars)
2018 Sep. 05.84, 8.4, 3.5' (A. Tsvetkov, Zavolzhye, 0.05-m reflector)
2018 Sep. 05.83, 7.4, 6' (P. Camilleri, 0.08-m refractor)
2018 Sep. 05.48, 7.3, 8' (C. Hergenrother, 10x50 binoculars)
2018 Sep. 05.35, 7.3, 6' (M. Goiato, 20x100 binoculars; 15.0' tail in p.a. 270)
2018 Sep. 05.10, 7.4, 5' (C. Labordena, Benlloch, 11x80 binoculars; 10.0-deg tail)
2018 Sep. 05.00, 8.3, 3.94' (D. Buczynski, tarbatness MPC I81, 0.35-m Schmidt-Cassegrain)
2018 Sep. 04.95, 7.5, 6.5' (C. Harder, Jeersdorf, Germany, 0.15-m Newtonian reflector; 20.0' tail in p.a. 270)
2018 Sep. 04.95, 7.3, 8' (G. van Buitenen, Rendeux, BE, 10x50 binoculars)
2018 Sep. 04.92, 7.1, 8' (M. Reszelski, Szamotuly, 25x100 binoculars)
2018 Sep. 04.83, 7.3, 4' (P. Camilleri, 20x80 binoculars)
2018 Sep. 04.48, 7.2, 8' (C. Hergenrother, 10x50 binoculars)
2018 Sep. 04.21, 8.1, 5.8' (N. Paul, Slooh, Canary Island (MPC - G40), 0.43-m Schmidt-Cassegrain)
2018 Sep. 04.12, 7.4, 9' (J. Fraser, Alness, Scotland., 20x60 binoculars)
2018 Sep. 03.98, 8.0, 4.9' (D. Bamberger, 0.254-m Ritchey-Chretien; 8.3' tail in p.a. 270)
2018 Sep. 03.92, 7.2, 8' (M. Reszelski, Szamotuly, 25x100 binoculars; 0.3-deg tail in p.a. 275)
2018 Sep. 03.91, 7.8, 4' (J. Warell, Lindby Observatory (K60), Skurup, Sweden , 20x100 binoculars; 20.0' tail in p.a. 270)
2018 Sep. 03.83, 7.5, 4' (P. Camilleri, 0.08-m refractor)
2018 Sep. 03.40, 7.5, 5.6' (S. Aguirre, Hermosillo, Sonora,Mex. , 0.15-m Schmidt-Cassegrain)
2018 Sep. 03.38, [ 6.2, -- (S. Aguirre, Hermosillo, Sonora,Mex. , 7x50 binoculars)
2018 Sep. 03.33, 7.1, 7' (C. Morris, Dreamweaver Observatory, 20x80 binoculars)
2018 Sep. 02.91, 7.2, 7' (M. Reszelski, Szamotuly, 25x100 binoculars)
2018 Sep. 02.86, 7.4, 5' (T. Karhula, Halleskogsbrannan, Virsbo, Sweden, 8x20 binoculars)
2018 Sep. 02.85, 8.1, 4' (J. Warell, Lindby Observatory (K60), Skurup, Sweden , 20x100 binoculars; 15.0' tail in p.a. 275)
2018 Sep. 02.85, 7.3, 8' (P. Guzik, 10x50 binoculars)
2018 Sep. 02.85, 6.7, 11' (M. Paradowski, Dąbrowa, Poland, 0.068-m refractor)
2018 Sep. 02.82, 7.6, 5' (P. Camilleri, 20x80 binoculars)
2018 Sep. 02.37, 7.1, 7' (C. Morris, Dreamweaver Observatory, 20x80 binoculars)
2018 Sep. 02.05, 8.0, 7.33' (N. James, 0.28-m Schmidt-Cassegrain)
2018 Sep. 02.02, 8.1, 4.7' (D. Buczynski, tarbatness MPC I81, 0.35-m Schmidt-Cassegrain)
2018 Sep. 01.94, 7.6, 5' (C. Labordena, La Serra, 11x80 binoculars)
2018 Sep. 01.93, 7.4, 5' (J. Gonzalez Suarez, 10x50 binoculars)
2018 Sep. 01.92, 7.7, 5' (J. Gonzalez Suarez, 25x100 binoculars; 0.3-deg tail in p.a. 270)
2018 Sep. 01.90, 7.4, 8' (A. Scholten, Eerbeek, 15x80 binoculars)
2018 Sep. 01.89, 7.8, 4.6' (C. Harder, Jeersdorf, Germany, 0.15-m Newtonian reflector)
2018 Sep. 01.83, 7.7, 6' (P. Camilleri, 20x80 binoculars)
2018 Sep. 01.48, 7.4, 8' (C. Hergenrother, 10x50 binoculars)
2018 Aug. 31.92, 7.8, 6.6' (A. Novichonok, 0.114-m Newtonian reflector; 20.0' tail in p.a. 265)
2018 Aug. 31.83, 7.8, 5' (P. Camilleri, 20x80 binoculars)
2018 Aug. 31.08, 7.9, 5' (J. Fraser, Alness, Scotland., 20x60 binoculars)
2018 Aug. 31.00, 7.8, 8.4' (D. Bamberger, 0.254-m Ritchey-Chretien; 8.0' tail in p.a. 268)
2018 Aug. 30.87, 8.2, 5' (D. Swan, Tynemouth, UK, 0.2-m Schmidt-Cassegrain)
2018 Aug. 30.00, 8.6, 3.76' (D. Buczynski, tarbatness MPC I81, 0.35-m Schmidt-Cassegrain)
2018 Aug. 28.93, 7.6, 9.7' (S. Fritsche, 0.1-m refractor; 0.18-deg tail in p.a. 272)
2018 Aug. 28.84, 7.3, 17' (T. Lehmann, 0.075-m reflector; 1.2-deg tail in p.a. 272)
2018 Aug. 28.41, 7.6, 8' (C. Hergenrother, 10x50 binoculars)
2018 Aug. 27.92, 7.5, 6' (P. Guzik, 10x50 binoculars)
2018 Aug. 27.46, 6.9, 20' (R. Ramlow, 0.106-m refractor; 61.0' tail in p.a. 273)
2018 Aug. 27.40, 7.6, 3' (S. Aguirre, Hermosillo, Sonora,Mex. , 0.15-m Schmidt-Cassegrain)
2018 Aug. 27.35, 7.3, 5' (M. Goiato, 20x100 binoculars)
2018 Aug. 25.94, 7.2, 25' (T. Lehmann, 0.075-m reflector; 1.5-deg tail in p.a. 269)
2018 Aug. 25.06, 7.8, 6.6' (A. Novichonok, 0.15-m Newtonian reflector; 20.0' tail in p.a. 265)
2018 Aug. 25.04, 7.4, 6' (J. Fraser, Alness, Scotland., 20x60 binoculars)
2018 Aug. 25.02, 8.5, 10.5' (D. Bamberger, 0.254-m Ritchey-Chretien; 8.0' tail in p.a. 267)
2018 Aug. 24.84, 7.7, -- (W. Moskal, OA Jaslo, Poland, 20x80 binoculars)
2018 Aug. 24.02, 7.5, 3' (M. Kwinta, Krakow, 0.185-m Newtonian reflector)
2018 Aug. 24.01, 7.8, 6.6' (A. Novichonok, 0.114-m Newtonian reflector; 10.0' tail in p.a. 265)
2018 Aug. 24.00, 8.2, 4.5' (D. Buczynski, Tarbatness MPC I81, 0.35-m Schmidt-Cassegrain)
2018 Aug. 23.96, 7.7, 7' (A. Novichonok, With Nikon D5200 (53-mm lens), 0.01-m refractor; 27.0' tail in p.a. 264)
2018 Aug. 23.96, 7.6, 8' (A. Novichonok, With Nikon D5200 (53-mm lens), 0.01-m refractor; 16.0' tail in p.a. 263)
2018 Aug. 23.09, 7.2, 30' (T. Lehmann, 0.075-m reflector; 1.7-deg tail in p.a. 266)
2018 Aug. 23.07, 7.5, 9' (M. Meyer, 10x50 binoculars)
2018 Aug. 23.05, 7.7, 6' (C. Harder, Jeersdorf, Germany, 0.198-m Newtonian reflector; 22.0' tail in p.a. 258)
2018 Aug. 23.05, 7.1, 12' (P. Guzik, 10x50 binoculars; 0.8-deg tail in p.a. 260)
2018 Aug. 23.05, 7.5, 3' (M. Kwinta, Krakow, 0.185-m Newtonian reflector)

29P/Schwassmann-Wachmann
Total-magnitude and coma-diameter estimates:
2018 Sep. 18.72, [14.1, -- (C. Wyatt, 0.25-m Newtonian reflector)
2018 Sep. 15.06, 12.5, 5.4' (D. Bamberger, 0.071-m refractor; 2.6' tail in p.a. 140)
2018 Sep. 14.96, 13.6, 2.63' (D. Buczynski, tarbatness mpc I81, 0.35-m Schmidt-Cassegrain)
2018 Sep. 13.01, [14.2, 0.5' (P. Guzik, 0.326-m Newtonian reflector)
2018 Sep. 10.99, 15.5, 1.1' (D. Bamberger, 0.254-m Ritchey-Chretien; 0.5' tail in p.a. 164)
2018 Sep. 08.40, [14.3, -- (C. Wyatt, 0.25-m Newtonian reflector)
2018 Sep. 07.95, 14.9, 0.5' (C. Harder, Jeersdorf, Germany, 0.531-m Newtonian reflector)
2018 Sep. 07.90, 12.0, 2.3' (K. Hills, 0.5-m Newtonian reflector)
2018 Sep. 06.88, 12.0, 1.9' (K. Hills, 0.5-m Newtonian reflector)
2018 Sep. 06.20, 12.8, 0.7' (K. Hills, 0.5-m Newtonian reflector)
2018 Sep. 05.57, [14.8, -- (P. Camilleri, 0.406-m Newtonian reflector)
2018 Sep. 04.95, 13.1, 0.9' (K. Hills, 0.5-m Newtonian reflector)
2018 Sep. 04.01, 16.3, 0.3' (D. Bamberger, 0.254-m Ritchey-Chretien)
2018 Sep. 03.94, 12.3, 2.1' (K. Hills, 0.5-m Newtonian reflector)
2018 Sep. 02.09, 12.8, 1.6' (K. Hills, 0.5-m Newtonian reflector)
2018 Aug. 31.90, 12.5, 1.2' (K. Hills, 0.5-m Newtonian reflector)
2018 Aug. 31.53, [15.0, -- (P. Camilleri, 0.406-m Newtonian reflector)
2018 Aug. 31.07, 12.6, 1.2' (K. Hills, 0.5-m Newtonian reflector)
2018 Aug. 24.08, 15.0, 0.9' (D. Bamberger, 0.254-m Ritchey-Chretien; 0.3' tail in p.a. 143)
2018 Aug. 23.03, 13.6, 1.5' (P. Guzik, 0.326-m Newtonian reflector)

37P/Forbes
Total-magnitude and coma-diameter estimates:
2018 Sep. 19.06, 11.0, 7' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain)
2018 Sep. 17.75, [13.1, 0.7' (S. Yoshida, 0.4-m Newtonian reflector)
2018 Sep. 16.74, [13.5, 0.6' (S. Yoshida, 0.4-m Newtonian reflector)
2018 Sep. 14.97, 14.8, 1.5' (D. Buczynski, tarbatness mpc I81, 0.35-m Schmidt-Cassegrain)
2018 Sep. 11.07, 13.7, 0.7' (K. Hills, 0.5-m Newtonian reflector)
2018 Sep. 09.97, 11.0, 6' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain)
2018 Sep. 08.95, 14.5, 4.3' (D. Buczynski, tarbatness MPC I81, 0.35-m Schmidt-Cassegrain)
2018 Sep. 07.51, 14.1, 4.2' (T. Lehmann, 0.106-m refractor; 0.62-deg tail in p.a. 231)
2018 Sep. 05.96, 14.7, 1.5' (D. Buczynski, Tarbatness MPC I81, 0.35-m Schmidt-Cassegrain)
2018 Sep. 04.10, 13.8, 0.9' (K. Hills, 0.5-m Newtonian reflector)
2018 Aug. 23.08, 14.2, 2.5' (T. Lehmann, 0.2-m Newtonian reflector; 0.4-deg tail in p.a. 234)

38P/Stephan-Oterma
Total-magnitude and coma-diameter estimates:
2018 Sep. 19.42, 11.5, 6.2' (R. Ramlow, 0.106-m refractor; 3.6' tail in p.a. 254)
2018 Sep. 19.17, 10.0, 6' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain)
2018 Sep. 19.10, 12.1, 3.57' (D. Buczynski, tarbatness MPC I81, 0.35-m Schmidt-Cassegrain)
2018 Sep. 18.81, 12.0, 1.5' (P. Camilleri, 0.406-m Newtonian reflector)
2018 Sep. 18.74, 12.4, 1.8' (C. Wyatt, 0.25-m Newtonian reflector)
2018 Sep. 17.68, 11.5, 1.3' (S. Yoshida, 0.4-m Newtonian reflector)
2018 Sep. 16.82, 12.0, 1.3' (P. Camilleri, 0.406-m Newtonian reflector)
2018 Sep. 16.69, 11.4, 2.3' (S. Yoshida, 0.4-m Newtonian reflector)
2018 Sep. 14.83, 12.4, 1.5' (P. Camilleri, 0.406-m Newtonian reflector)
2018 Sep. 13.04, 12.1, 1.5' (P. Guzik, 0.326-m Newtonian reflector)
2018 Sep. 12.46, 11.8, 5.1' (R. Ramlow, 0.106-m refractor; 4.2' tail in p.a. 246)
2018 Sep. 12.17, 11.0, 1.1' (K. Hills, 0.5-m Newtonian reflector)
2018 Sep. 12.12, 11.4, 8' (T. Lehmann, 0.2-m Newtonian reflector; 0.07-deg tail in p.a. 253)
2018 Sep. 11.83, 12.2, 1.8' (P. Camilleri, 0.406-m Newtonian reflector)
2018 Sep. 11.10, 12.6, 1.59' (M. Paradowski, Lublin, Poland, 0.034-m reflector)
2018 Sep. 10.78, 12.2, 1.8' (P. Camilleri, 0.406-m Newtonian reflector)
2018 Sep. 10.17, 9.9, 5' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain)
2018 Sep. 10.01, 12.6, 1.2' (A. Novichonok, 0.2-m Newtonian reflector)
2018 Sep. 10.01, 12.9, 1.5' (A. Novichonok, With Nikon D5200 (126-mm lens), 0.026-m refractor)
2018 Sep. 09.01, 12.7, 1' (A. Novichonok, 0.2-m Newtonian reflector)
2018 Sep. 08.12, 11.7, 6.8' (T. Lehmann, 0.2-m Newtonian reflector; 0.09-deg tail in p.a. 250)
2018 Sep. 08.06, 12.4, 1' (C. Harder, Jeersdorf, Germany, 0.531-m Newtonian reflector)
2018 Sep. 06.82, 12.5, 1.5' (P. Camilleri, 0.406-m Newtonian reflector)
2018 Sep. 05.83, 12.7, 1.5' (P. Camilleri, 0.406-m Newtonian reflector)
2018 Aug. 28.80, 12.3, 5.3' (T. Lehmann, 0.127-m refractor)
2018 Aug. 23.06, 13.0, 1.2' (P. Guzik, 0.326-m Newtonian reflector)

46P/Wirtanen
Total-magnitude and coma-diameter estimates:
2018 Sep. 19.81, 13.3, 0.8' (A. Pearce, Nedlands, 0.41-m Newtonian reflector)
2018 Sep. 19.41, 11.9, 6.9' (R. Ramlow, 0.106-m refractor)
2018 Sep. 19.12, 11.6, 2' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain)
2018 Sep. 18.81, 13.4, 0.7' (A. Pearce, Nedlands, 0.41-m Newtonian reflector)
2018 Sep. 18.79, 12.8, 2' (P. Camilleri, 0.406-m Newtonian reflector)
2018 Sep. 18.73, 12.4, 3.4' (C. Wyatt, 0.25-m Newtonian reflector)
2018 Sep. 17.70, [13.4, 0.6' (S. Yoshida, 0.4-m Newtonian reflector)
2018 Sep. 16.81, 13.0, 1.5' (P. Camilleri, 0.406-m Newtonian reflector)
2018 Sep. 16.70, [13.6, 0.6' (S. Yoshida, 0.4-m Newtonian reflector)
2018 Sep. 14.68, 13.3, 1.5' (P. Camilleri, 0.406-m Newtonian reflector)
2018 Sep. 13.45, 11.2, 14' (T. Lehmann, 0.106-m refractor)
2018 Sep. 13.02, 13.0, 1.2' (P. Guzik, 0.326-m Newtonian reflector)
2018 Sep. 12.45, 12.7, 4' (R. Ramlow, 0.106-m refractor)
2018 Sep. 11.10, 12.7, 1' (K. Hills, 0.5-m Newtonian reflector)
2018 Sep. 10.79, 13.5, 1' (P. Camilleri, 0.406-m Newtonian reflector)
2018 Sep. 10.10, 12.4, 1.5' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain)
2018 Sep. 09.74, 13.6, 1.3' (C. Wyatt, 0.25-m Newtonian reflector)
2018 Sep. 07.53, 11.8, 13' (T. Lehmann, 0.106-m refractor)

48P/Johnson
Total-magnitude and coma-diameter estimates:
2018 Sep. 19.02, 10.3, 7' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain)
2018 Sep. 18.70, 12.8, 1.4' (C. Wyatt, 0.25-m Newtonian reflector)
2018 Sep. 17.65, 13.3, 1' (S. Yoshida, 0.4-m Newtonian reflector)
2018 Sep. 14.65, 12.6, 1.5' (P. Camilleri, 0.406-m Newtonian reflector)
2018 Sep. 14.47, 12.6, 1.8' (R. Ramlow, 0.106-m refractor; 2.5' tail in p.a. 288)
2018 Sep. 11.68, 12.4, 1.5' (P. Camilleri, 0.406-m Newtonian reflector)
2018 Sep. 10.39, 12.8, 1.6' (C. Wyatt, 0.25-m Newtonian reflector)
2018 Sep. 09.98, 10.1, 7' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain)
2018 Sep. 09.72, 13.0, 1.2' (C. Wyatt, 0.25-m Newtonian reflector)
2018 Sep. 08.40, 12.8, 1.6' (C. Wyatt, 0.25-m Newtonian reflector)
2018 Sep. 07.71, 12.9, 1.2' (C. Wyatt, 0.25-m Newtonian reflector)
2018 Sep. 06.48, 12.6, 1.5' (P. Camilleri, 0.406-m Newtonian reflector)
2018 Sep. 05.55, 12.4, 1.5' (P. Camilleri, 0.406-m Newtonian reflector)
2018 Sep. 03.49, 12.5, 1.2' (P. Camilleri, 0.406-m Newtonian reflector)
2018 Sep. 02.11, 12.0, 1.3' (K. Hills, 0.5-m Newtonian reflector)
2018 Sep. 01.53, 12.5, 1.5' (P. Camilleri, 0.406-m Newtonian reflector)
2018 Aug. 31.52, 12.5, 1.5' (P. Camilleri, 0.406-m Newtonian reflector)
2018 Aug. 29.38, 12.7, 1.8' (C. Wyatt, 0.25-m Newtonian reflector)

59P/Kearns-Kwee
Total-magnitude and coma-diameter estimates:
2018 Sep. 16.48, 16.8, -- (G. van Buitenen, Auberry, California (U69), 0.61-m Ritchey-Chretien)

64P/Swift-Gehrels
Total-magnitude and coma-diameter estimates:
2018 Sep. 20.98, [12.1, -- (A. Novichonok, 0.15-m Newtonian reflector)
2018 Sep. 19.16, 12.2, 1.5' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain)
2018 Sep. 18.71, 13.1, 1.3' (C. Wyatt, 0.25-m Newtonian reflector)
2018 Sep. 17.67, 12.2, 1.6' (S. Yoshida, 0.4-m Newtonian reflector)
2018 Sep. 16.68, 13.2, 0.8' (S. Yoshida, 0.4-m Newtonian reflector)
2018 Sep. 16.03, 12.3, 3.5' (M. Paradowski, Dąbrowa, Poland, 0.05-m reflector)
2018 Sep. 15.38, 11.6, 6.5' (R. Ramlow, 0.106-m refractor)
2018 Sep. 15.00, 14.3, 0.56' (D. Buczynski, tarbatness mpc I81, 0.35-m Schmidt-Cassegrain)
2018 Sep. 14.71, 12.3, 1.2' (P. Camilleri, 0.406-m Newtonian reflector)
2018 Sep. 13.03, 12.4, 2.5' (P. Guzik, 0.326-m Newtonian reflector)
2018 Sep. 12.93, 13.7, 0.6' (T. Karhula, Virsbo, Sweden, 0.305-m Newtonian reflector)
2018 Sep. 12.84, 11.0, 13' (T. Lehmann, 0.075-m reflector)
2018 Sep. 11.72, 12.5, 1.5' (P. Camilleri, 0.406-m Newtonian reflector)
2018 Sep. 11.09, 12.6, 1.4' (K. Hills, 0.5-m Newtonian reflector)
2018 Sep. 10.75, 12.5, 1.8' (P. Camilleri, 0.406-m Newtonian reflector)
2018 Sep. 10.00, 12.5, 1.1' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain)
2018 Sep. 09.73, 13.6, 1' (C. Wyatt, 0.25-m Newtonian reflector)
2018 Sep. 08.90, 12.8, 3.76' (D. Buczynski, tarbatness MPC I81, 0.35-m Schmidt-Cassegrain)
2018 Sep. 08.06, 11.9, 8' (T. Lehmann, 0.2-m Newtonian reflector)
2018 Sep. 07.92, 14.5, 0.4' (C. Harder, Jeersdorf, Germany, 0.531-m Newtonian reflector)
2018 Sep. 06.79, 13.5, 1' (P. Camilleri, 0.406-m Newtonian reflector)
2018 Sep. 05.97, 13.6, 2.4' (D. Buczynski, Tarbatness MPC I81, 0.35-m Schmidt-Cassegrain)
2018 Sep. 05.95, 13.7, 1' (C. Harder, Jeersdorf, Germany, 0.531-m Newtonian reflector)
2018 Sep. 05.91, 12.2, 6.9' (T. Lehmann, 0.075-m reflector)
2018 Sep. 05.59, 13.6, 1' (P. Camilleri, 0.406-m Newtonian reflector)
2018 Sep. 03.63, 13.3, 1' (P. Camilleri, 0.406-m Newtonian reflector)
2018 Aug. 23.04, 14.0, 1.5' (P. Guzik, 0.326-m Newtonian reflector)

65P/Gunn
Total-magnitude and coma-diameter estimates:
2018 Sep. 02.12, 16.5, 0.4' (K. Hills, 0.5-m Newtonian reflector)

66P/du Toit
Total-magnitude and coma-diameter estimates:
2018 Sep. 08.06, 15.5, -- (C. Harder, Jeersdorf, Germany, 0.531-m Newtonian reflector)
2018 Sep. 07.55, 14.0, 5.3' (T. Lehmann, 0.106-m refractor)
2018 Sep. 03.99, 14.4, 0.7' (K. Hills, 0.5-m Newtonian reflector)

78P/Gehrels
Total-magnitude and coma-diameter estimates:
2018 Sep. 17.66, [13.8, 0.6' (S. Yoshida, 0.4-m Newtonian reflector)
2018 Sep. 11.00, 13.4, 1.4' (K. Hills, 0.5-m Newtonian reflector)
2018 Sep. 09.90, 12.9, 1' (K. Hills, 0.5-m Newtonian reflector)

95P/Chiron
Total-magnitude and coma-diameter estimates:
2018 Sep. 04.97, 18.0, 0.2' (K. Hills, 0.5-m Newtonian reflector)

123P/West-Hartley
Total-magnitude and coma-diameter estimates:
2018 Sep. 16.49, 16.2, -- (G. van Buitenen, Auberry, California (U69), 0.61-m Ritchey-Chretien)

137P/Shoemaker-Levy
Total-magnitude and coma-diameter estimates:
2018 Sep. 07.93, 16.1, 0.3' (K. Hills, 0.5-m Newtonian reflector)
2018 Aug. 31.94, 16.7, 0.2' (K. Hills, 0.5-m Newtonian reflector)

174P/Echeclus
Total-magnitude and coma-diameter estimates:
2018 Sep. 07.17, 18.6, 0.2' (K. Hills, 0.5-m Newtonian reflector)
2018 Aug. 23.14, 19.1, 0.2' (K. Hills, 0.5-m Newtonian reflector)

223P/Skiff
Total-magnitude and coma-diameter estimates:
2018 Sep. 04.01, 18.2, 0.2' (K. Hills, 0.5-m Newtonian reflector)

361P/Spacewatch
Total-magnitude and coma-diameter estimates:
2018 Aug. 25.21, 17.4, 0.3' (K. Hills, 0.5-m Newtonian reflector)

364P/PANSTARRS
Total-magnitude and coma-diameter estimates:
2018 Sep. 19.03, 11.3, 3.5' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain)
2018 Sep. 10.12, 11.8, 2.7' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain)
2018 Sep. 04.06, 13.1, 0.6' (K. Hills, 0.5-m Newtonian reflector)
2018 Sep. 01.52, 16.3, 0.3' (C. Hergenrother, 0.51-m Ritchey-Chretien; 5.0' tail in p.a. 246)
2018 Aug. 23.15, 14.0, 0.8' (K. Hills, 0.5-m Newtonian reflector)

C/2015 V1 (PANSTARRS)
Total-magnitude and coma-diameter estimates:
2018 Sep. 04.05, 15.8, 0.5' (K. Hills, 0.5-m Newtonian reflector)

C/2016 M1 (PANSTARRS)
Total-magnitude and coma-diameter estimates:
2018 Sep. 14.39, 9.2, 14' (T. Lehmann, 0.106-m refractor)
2018 Sep. 13.43, 10.4, 3' (P. Camilleri, 0.406-m Newtonian reflector)
2018 Sep. 10.38, 9.8, 3.5' (C. Wyatt, 0.25-m Newtonian reflector)
2018 Sep. 09.94, 10.1, 3' (M. Goiato, 0.22-m Newtonian reflector)
2018 Sep. 09.40, 9.6, 4.9' (C. Wyatt, 0.25-m Newtonian reflector)
2018 Sep. 08.38, 9.7, 4.8' (C. Wyatt, 0.25-m Newtonian reflector)
2018 Sep. 07.40, 9.8, 3.2' (C. Wyatt, 0.25-m Newtonian reflector)
2018 Sep. 06.46, 10.1, 3' (P. Camilleri, 0.406-m Newtonian reflector)
2018 Sep. 04.42, 9.3, 8.3' (R. Ramlow, 0.09-m refractor)
2018 Sep. 04.41, 9.1, 14' (T. Lehmann, 0.106-m refractor)
2018 Sep. 03.46, 9.9, 2.5' (P. Camilleri, 0.406-m Newtonian reflector)
2018 Sep. 01.45, 9.8, 2' (P. Camilleri, 0.406-m Newtonian reflector)
2018 Aug. 31.45, 9.8, 2.5' (P. Camilleri, 0.406-m Newtonian reflector)
2018 Aug. 29.41, 9.0, 14' (T. Lehmann, 0.106-m refractor)
2018 Aug. 29.37, 9.8, 2.9' (C. Wyatt, 0.25-m Newtonian reflector)
2018 Aug. 28.93, 10.0, 1' (A. Amorim, 0.09-m refractor)
2018 Aug. 27.93, 9.2, 6' (A. Ferrao, 0.114-m Newtonian reflector)
2018 Aug. 27.91, 10.0, 1' (A. Amorim, 0.09-m refractor)

C/2016 N6 (PANSTARRS)
Total-magnitude and coma-diameter estimates:
2018 Sep. 16.84, 12.0, 1' (P. Camilleri, 0.406-m Newtonian reflector)
2018 Sep. 15.48, 12.7, 3.6' (T. Lehmann, 0.106-m refractor)
2018 Sep. 13.08, 12.3, 1' (P. Guzik, 0.326-m Newtonian reflector)

C/2016 R2 (PANSTARRS)
Total-magnitude and coma-diameter estimates:
2018 Sep. 13.07, 12.5, 1' (P. Guzik, 0.326-m Newtonian reflector)
2018 Sep. 05.87, 12.1, 6.8' (T. Lehmann, 0.075-m reflector)
2018 Sep. 01.87, 10.5, 5' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain; 0.3-deg tail in p.a. 10)
2018 Aug. 28.84, 11.8, 5.6' (S. Fritsche, 0.1-m refractor)

C/2017 K2 (PANSTARRS)
Total-magnitude and coma-diameter estimates:
2018 Sep. 16.91, 17.7, 0.6' (T. Lehmann, 0.3-m Newtonian reflector)
2018 Sep. 11.81, 17.7, 0.5' (T. Lehmann, 0.3-m Newtonian reflector)
2018 Aug. 28.87, 17.7, 0.3' (K. Hills, 0.5-m Newtonian reflector)

C/2017 K4 (ATLAS)
Total-magnitude and coma-diameter estimates:
2018 Sep. 04.00, 17.9, 0.3' (K. Hills, 0.5-m Newtonian reflector)

C/2017 M4 (ATLAS)
Total-magnitude and coma-diameter estimates:
2018 Sep. 17.46, [13.7, 0.4' (S. Yoshida, 0.4-m Newtonian reflector)
2018 Sep. 10.87, 13.6, 1' (K. Hills, 0.5-m Newtonian reflector)
2018 Sep. 07.86, 13.7, 0.55' (C. Harder, Jeersdorf, Germany, 0.531-m Newtonian reflector)
2018 Sep. 06.47, 14.0, 0.7' (P. Camilleri, 0.406-m Newtonian reflector)
2018 Sep. 04.83, 14.2, 0.45' (C. Harder, Jeersdorf, Germany, 0.531-m Newtonian reflector)
2018 Sep. 03.48, 14.0, 0.8' (P. Camilleri, 0.406-m Newtonian reflector)
2018 Aug. 31.46, 13.9, 0.7' (P. Camilleri, 0.406-m Newtonian reflector)
2018 Aug. 28.89, 14.4, 1.8' (S. Fritsche, 0.1-m refractor; 0.01-deg tail in p.a. 42)
2018 Aug. 28.89, 13.6, 0.9' (K. Hills, 0.5-m Newtonian reflector)

C/2017 T3 (ATLAS)
Total-magnitude and coma-diameter estimates:
2018 Aug. 29.37, 12.3, 1.4' (C. Wyatt, 0.25-m Newtonian reflector)

C/2018 C2 (Lemmon)
Total-magnitude and coma-diameter estimates:
2018 Sep. 06.86, 16.9, 0.3' (K. Hills, 0.5-m Newtonian reflector)

C/2018 L2 (ATLAS)
Total-magnitude and coma-diameter estimates:
2018 Sep. 06.44, 14.2, 1' (P. Camilleri, 0.406-m Newtonian reflector)
2018 Sep. 03.44, 13.9, 1.2' (P. Camilleri, 0.406-m Newtonian reflector)
2018 Sep. 01.44, 13.8, 1' (P. Camilleri, 0.406-m Newtonian reflector)
2018 Aug. 31.44, 13.8, 1' (P. Camilleri, 0.406-m Newtonian reflector)

C/2018 N1 (NEOWISE)
Total-magnitude and coma-diameter estimates:
2018 Sep. 10.85, 13.2, 1' (K. Hills, 0.5-m Newtonian reflector)
2018 Sep. 08.39, 12.9, 1.8' (C. Wyatt, 0.25-m Newtonian reflector)
2018 Sep. 07.43, 12.4, 2' (C. Wyatt, 0.25-m Newtonian reflector)
2018 Sep. 06.45, 12.3, 2.5' (P. Camilleri, 0.406-m Newtonian reflector)
2018 Sep. 04.41, 11.5, 9.5' (T. Lehmann, 0.106-m refractor)
2018 Sep. 03.87, 13.3, 0.9' (K. Hills, 0.5-m Newtonian reflector)
2018 Sep. 03.45, 12.2, 2.5' (P. Camilleri, 0.406-m Newtonian reflector)
2018 Sep. 01.86, 9.3, 10' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain)
2018 Sep. 01.45, 12.0, 3' (P. Camilleri, 0.406-m Newtonian reflector)
2018 Aug. 31.43, 12.0, 3' (P. Camilleri, 0.406-m Newtonian reflector)
2018 Aug. 29.42, 11.4, 11' (T. Lehmann, 0.106-m refractor)
2018 Aug. 28.88, 12.9, 1.4' (K. Hills, 0.5-m Newtonian reflector)

C/2018 N2 (ASASSN)
Total-magnitude and coma-diameter estimates:
2018 Sep. 18.80, 13.8, 1' (P. Camilleri, 0.406-m Newtonian reflector)
2018 Sep. 14.70, 14.0, 0.9' (P. Camilleri, 0.406-m Newtonian reflector)
2018 Sep. 11.70, 14.0, 0.8' (P. Camilleri, 0.406-m Newtonian reflector)
2018 Sep. 10.76, 14.2, 0.7' (P. Camilleri, 0.406-m Newtonian reflector)
2018 Sep. 06.80, 14.5, 0.5' (P. Camilleri, 0.406-m Newtonian reflector)
2018 Sep. 04.19, 14.1, 0.5' (K. Hills, 0.5-m Newtonian reflector)

P/2010 A1 (Hill)
Total-magnitude and coma-diameter estimates:
2018 Sep. 08.25, 18.1, 0.2' (K. Hills, 0.5-m Newtonian reflector)

P/2018 L5 (Leonard)
Total-magnitude and coma-diameter estimates:
2018 Sep. 04.04, 17.5, 0.3' (K. Hills, 0.5-m Newtonian reflector)