Recent Comet Brightness Estimates

2P/Encke
Total-magnitude and coma-diameter estimates:
2017 Feb. 27.76, 7.9, 2' (W. Hasubick, 0.44-m Newtonian reflector)
2017 Feb. 26.76, 8.4, 1.4' (J. Cerny, 0.355-m Newtonian reflector)
2017 Feb. 25.76, 8.5, 1.7' (W. Vollmann, 0.054-m refractor)
2017 Feb. 24.83, 8.4, 2' (J. Gonzalez Suarez, 10x50 binoculars)
2017 Feb. 24.82, 8.8, 2.5' (J. Gonzalez Suarez, 25x100 binoculars)
2017 Feb. 24.79, 7.6, 1.5' (T. Karhula, Lysvik, Sweden, 18x50 binoculars)
2017 Feb. 24.77, 8.5, 4' (M. Hahn, Kiel, 0.09-m refractor)
2017 Feb. 24.77, 9.0, 1.7' (C. Harder, Jeersdorf, Germany , 0.406-m Newtonian reflector)
2017 Feb. 24.76, & 7.9, 2' (J. Warell, Lindby Observatory (K60), Skurup, Sweden , 20x100 binoculars)
2017 Feb. 23.84, 8.5, 3.3' (K. Hills, 0.5-m Newtonian reflector)
2017 Feb. 22.83, 8.4, 2' (J. Gonzalez Suarez, 10x50 binoculars)
2017 Feb. 22.82, 8.7, 2.5' (J. Gonzalez Suarez, 25x100 binoculars)
2017 Feb. 21.11, 8.6, 2' (C. Hergenrother, 30x125 binoculars)
2017 Feb. 19.84, 9.0, 3.8' (K. Hills, 0.5-m Newtonian reflector; 11.6' tail in p.a. 60)
2017 Feb. 19.77, 8.9, 2.2' (M. Biely, Czech Republic, Brno, 20x80 binoculars)
2017 Feb. 18.77, 8.7, 3' (V. Kasten, 20x80 binoculars)
2017 Feb. 18.71, 9.1, 1.8' (A. Novichonok, Konchezero, 0.2-m Newtonian reflector)
2017 Feb. 17.79, 9.6, 3' (C. Labordena, Culla, 2.0-m Schmidt-Cassegrain)
2017 Feb. 17.11, 9.5, 1.8' (C. Hergenrother, 30x125 binoculars)
2017 Feb. 16.84, 9.5, 3.1' (K. Hills, 0.5-m Newtonian reflector; 6.6' tail in p.a. 60)
2017 Feb. 16.82, 9.2, 3' (J. Gonzalez Suarez, 25x100 binoculars)
2017 Feb. 16.81, 9.4, 2.5' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain)
2017 Feb. 16.77, 9.2, 2.1' (W. Hasubick, 0.44-m Newtonian reflector)
2017 Feb. 15.77, 10.0, 1.8' (C. Harder, Jeersdorf, Germany , 0.406-m Newtonian reflector)
2017 Feb. 15.77, 10.0, 2.1' (V. Kasten, 0.114-m refractor)
2017 Feb. 15.77, 9.7, 2.5' (A. Scholten, Eerbeek, 0.356-m Schmidt-Cassegrain)
2017 Feb. 15.76, 9.2, 3' (M. Meyer, 0.152-m refractor)
2017 Feb. 15.76, 9.0, 4' (P. Guzik, 10x50 binoculars)
2017 Feb. 15.76, 9.6, 9' (T. Lehmann, 0.075-m reflector)
2017 Feb. 15.76, 9.5, 3' (J. Warell, Lindby Observatory (K60), Skurup, Sweden , 25x100 binoculars)
2017 Feb. 15.75, 9.3, 2.5' (P. Guzik, 0.326-m Newtonian reflector)
2017 Feb. 15.75, 9.5, 2.3' (M. Biely, Czech Republic, Brno, 20x80 binoculars)
2017 Feb. 15.74, 9.7, 1.5' (W. Vollmann, 0.054-m refractor)
2017 Feb. 15.74, 9.3, -- (W. Hasubick, 0.44-m Newtonian reflector)
2017 Feb. 15.73, 9.8, 2.5' (G. van Buitenen, Dordrecht, Netherlands, 0.305-m Newtonian reflector)
2017 Feb. 14.78, 10.8, 3.4' (D. Buczynski, Tarbatness Observatory MPC Code I81, 0.35-m Schmidt-Cassegrain)
2017 Feb. 14.76, 9.8, 2.8' (C. Harder, Jeersdorf, Germany , 0.406-m Newtonian reflector)
2017 Feb. 14.76, 9.1, 2.5' (B. Granslo, Eidsvoll Verk, 0.08-m refractor)
2017 Feb. 14.75, 9.5, 2.5' (P. Guzik, 0.326-m Newtonian reflector)
2017 Feb. 14.75, 9.4, 3.3' (T. Karhula, Virsbo, Sweden, 25x100 binoculars)
2017 Feb. 14.73, 10.0, 1.5' (W. Vollmann, 0.054-m refractor)
2017 Feb. 13.85, 10.4, 2.3' (K. Hills, 0.5-m Newtonian reflector)
2017 Feb. 13.77, 9.8, 2' (C. Harder, Jeersdorf, Germany , 0.303-m Newtonian reflector)
2017 Feb. 13.77, 11.6, 2.4' (D. Buczynski, Tarbatness Observatory MPC Code I81, 0.35-m Schmidt-Cassegrain)
2017 Feb. 13.75, 10.0, 2.5' (U. Pilz, 0.32-m Newtonian reflector)
2017 Feb. 13.75, 10.2, 2' (T. Karhula, Virsbo, Sweden, 0.305-m Newtonian reflector)
2017 Feb. 13.75, 9.8, 8' (T. Lehmann, 0.075-m reflector; 1.0-deg tail in p.a. 64)
2017 Feb. 12.75, 10.3, 2.2' (C. Harder, Jeersdorf, Germany , 0.252-m Newtonian reflector)
2017 Feb. 11.78, 11.6, 2.4' (D. Buczynski, Tarbatness Observatory MPC Code I81, 0.35-m Schmidt-Cassegrain)
2017 Feb. 11.08, 10.0, 8' (T. Lehmann, 0.106-m refractor; 0.5-deg tail in p.a. 241)
2017 Feb. 08.78, 12.0, 2.4' (D. Buczynski, Tarbatness Observatory MPC Code I81, 0.35-m Schmidt-Cassegrain)
2017 Feb. 08.08, 10.9, 3.7' (R. Ramlow, 0.25-m Newtonian reflector)
2017 Feb. 08.08, 10.3, 9' (T. Lehmann, 0.106-m refractor)
2017 Feb. 02.73, 10.6, 10' (T. Lehmann, 0.075-m reflector)
2017 Feb. 02.09, 11.8, 3.2' (R. Ramlow, 0.25-m Newtonian reflector)
2017 Feb. 01.73, 11.4, 2.3' (A. Novichonok, 0.039-m refractor)
2017 Feb. 01.08, 11.7, 3.5' (R. Ramlow, 0.25-m Newtonian reflector)
2017 Jan. 31.08, 10.7, 12' (T. Lehmann, 0.106-m refractor; 0.7-deg tail in p.a. 78)
2017 Jan. 29.78, 12.6, 3.3' (D. Buczynski, Tarbatness Observatory MPC Code I81, 0.35-m Schmidt-Cassegrain)

33P/Daniel
Total-magnitude and coma-diameter estimates:
2017 Feb. 18.08, 16.0, 0.2' (K. Hills, 0.5-m Newtonian reflector)
2017 Feb. 03.11, 15.5, 0.2' (K. Hills, 0.5-m Newtonian reflector)

41P/Tuttle-Giacobini-Kresak
Total-magnitude and coma-diameter estimates:
2017 Feb. 27.03, 9.2, 12' (P. Guzik, 10x50 binoculars)
2017 Feb. 26.83, 10.8, 1.8' (W. Hasubick, 0.44-m Newtonian reflector)
2017 Feb. 26.82, 10.6, 5.1' (J. Cerny, 0.355-m Newtonian reflector)
2017 Feb. 26.17, [10.6, -- (S. Aguirre, Hermosillo, Mexico, 0.15-m Schmidt-Cassegrain)
2017 Feb. 25.89, 9.5, 7.8' (M. Paradowski, Lublin, Poland, 0.068-m refractor)
2017 Feb. 25.80, 10.7, 2.8' (J. Bohusz, Myślin Poland, 0.38-m Newtonian reflector)
2017 Feb. 25.23, 10.1, 8.2' (R. Ramlow, 0.106-m Newtonian reflector)
2017 Feb. 25.21, 10.8, 2.54' (N. Paul, Mayhill, New Mexico (MPC Code - H06), 0.431-m Cassegrain reflector)
2017 Feb. 25.14, 9.6, 3' (J. Warell, Lindby Observatory (K60), Skurup, Sweden , 40x100 binoculars)
2017 Feb. 24.97, 10.2, 6' (P. Guzik, 0.27-m Newtonian reflector)
2017 Feb. 24.96, 9.8, 10' (P. Guzik, 10x50 binoculars)
2017 Feb. 24.94, 11.1, 2' (T. Karhula, Lysvik, Sweden, 0.305-m Newtonian reflector)
2017 Feb. 24.91, 10.9, 2.5' (M. Meyer, 0.254-m Newtonian reflector)
2017 Feb. 24.90, 9.4, 6' (J. Gonzalez Suarez, 25x100 binoculars)
2017 Feb. 24.89, 10.0, 5' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain)
2017 Feb. 24.81, 11.1, 2.6' (C. Harder, Jeersdorf, Germany , 0.406-m Newtonian reflector)
2017 Feb. 23.97, 11.4, 2.5' (M. Collins, Everton, 0.254-m Schmidt-Cassegrain)
2017 Feb. 23.63, 10.5, 8.6' (C. Wyatt, 0.25-m Newtonian reflector)
2017 Feb. 23.56, 10.7, 2' (P. Camilleri, 0.406-m Newtonian reflector)
2017 Feb. 23.26, 10.5, 7.2' (R. Ramlow, 0.25-m Newtonian reflector)
2017 Feb. 23.01, 10.6, 7.5' (P. Carson, Southend on Sea, Essex, UK, 0.315-m Cassegrain reflector)
2017 Feb. 22.51, 10.8, 4.7' (C. Wyatt, 0.25-m Newtonian reflector)
2017 Feb. 22.34, 8.8, 40' (T. Lehmann, 0.106-m refractor)
2017 Feb. 22.12, 11.3, 3' (M. Goiato, 0.22-m Newtonian reflector)
2017 Feb. 21.85, 11.5, 2.1' (A. Novichonok, 0.2-m Newtonian reflector)
2017 Feb. 21.50, 11.1, 1.8' (P. Camilleri, 0.406-m Newtonian reflector)
2017 Feb. 21.24, 10.6, 6.5' (R. Ramlow, 0.25-m Newtonian reflector)
2017 Feb. 21.12, 11.6, 2.5' (M. Goiato, 0.22-m Newtonian reflector)
2017 Feb. 20.58, 11.3, 3.5' (N. Paul, Siding Spring - Australia - MPC Q62, 0.431-m Cassegrain reflector)
2017 Feb. 20.56, 11.0, 1.4' (P. Camilleri, 0.406-m Newtonian reflector)
2017 Feb. 20.46, 10.7, 5.3' (C. Wyatt, 0.25-m Newtonian reflector)
2017 Feb. 19.89, 11.8, 1.6' (A. Novichonok, 0.2-m Newtonian reflector)
2017 Feb. 19.68, 11.1, 1.3' (P. Camilleri, 0.406-m Newtonian reflector)
2017 Feb. 19.27, 11.5, 6.1' (R. Ramlow, 0.25-m Newtonian reflector)
2017 Feb. 18.99, 11.4, 1.6' (M. Meyer, 0.254-m Newtonian reflector)
2017 Feb. 18.99, 9.4, 25' (T. Lehmann, 0.075-m reflector)
2017 Feb. 18.95, 11.9, 1.7' (W. Kutschera, 0.54-m Newtonian reflector)
2017 Feb. 18.92, 11.5, 1' (C. Harder, Jeersdorf, Germany , 0.252-m Newtonian reflector)
2017 Feb. 18.91, 11.6, 2.8' (V. Kasten, 0.2-m Newtonian reflector)
2017 Feb. 18.02, 10.8, 4' (K. Hills, 0.5-m Newtonian reflector)
2017 Feb. 17.93, 11.8, 1.5' (C. Labordena, Culla, 2.0-m Schmidt-Cassegrain)
2017 Feb. 17.70, 11.7, 1.1' (C. Wyatt, 0.25-m Newtonian reflector)
2017 Feb. 17.19, 11.8, 5.5' (R. Ramlow, 0.25-m Newtonian reflector)
2017 Feb. 16.84, 10.9, 4' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain)
2017 Feb. 16.81, 12.0, 0.8' (W. Hasubick, 0.44-m Newtonian reflector)
2017 Feb. 16.09, 12.0, 3.8' (R. Ramlow, 0.431-m Newtonian reflector)
2017 Feb. 16.02, 11.8, 2' (M. Goiato, 0.22-m Newtonian reflector)
2017 Feb. 15.91, 12.1, 2.3' (V. Kasten, 0.2-m Newtonian reflector)
2017 Feb. 15.86, 12.0, 2.5' (A. Scholten, Eerbeek, 0.356-m Schmidt-Cassegrain)
2017 Feb. 15.85, 10.8, 4' (P. Guzik, 0.326-m Newtonian reflector)
2017 Feb. 15.82, 12.1, 0.9' (C. Harder, Jeersdorf, Germany , 0.406-m Newtonian reflector)
2017 Feb. 15.82, 10.9, 7.8' (J. Cerny, 0.35-m Newtonian reflector)
2017 Feb. 15.56, 12.5, 1' (P. Camilleri, 0.406-m Newtonian reflector)
2017 Feb. 14.89, 12.1, 1.5' (W. Kutschera, 0.54-m Newtonian reflector)
2017 Feb. 14.86, 12.4, 1.5' (C. Harder, Jeersdorf, Germany , 0.406-m Newtonian reflector)
2017 Feb. 14.80, 11.1, 4' (P. Guzik, 0.326-m Newtonian reflector)
2017 Feb. 13.79, 10.2, 16' (T. Lehmann, 0.075-m reflector)
2017 Feb. 13.78, 12.7, 0.6' (C. Harder, Jeersdorf, Germany , 0.303-m Newtonian reflector)
2017 Feb. 13.75, 12.5, 1.7' (U. Pilz, 0.32-m Newtonian reflector)
2017 Feb. 08.39, 10.9, 8' (T. Lehmann, 0.106-m refractor)
2017 Feb. 06.78, 13.4, 0.8' (S. Yoshida, 0.4-m Newtonian reflector)
2017 Feb. 05.94, 13.2, 1.8' (D. Buczynski, Tarbatness Observatory MPC Code I81, 0.35-m Schmidt-Cassegrain)
2017 Feb. 05.71, 12.5, 1' (P. Camilleri, 0.406-m Newtonian reflector)
2017 Feb. 05.69, 12.9, 0.8' (N. Paul, Siding Spring - Australia - MPC Q62, 0.431-m Cassegrain reflector)
2017 Feb. 05.17, 12.7, 0.6' (W. Hasubick, 0.44-m Newtonian reflector)
2017 Feb. 04.33, 12.5, 1.9' (R. Ramlow, 0.25-m Newtonian reflector)
2017 Feb. 02.42, 11.4, 12' (T. Lehmann, 0.106-m refractor)
2017 Feb. 02.25, 12.8, 1.6' (R. Ramlow, 0.25-m Newtonian reflector)
2017 Feb. 02.16, 13.1, 0.9' (K. Hills, 0.5-m Newtonian reflector)
2017 Feb. 01.25, 12.8, 1.5' (R. Ramlow, 0.25-m Newtonian reflector)
2017 Jan. 31.68, 13.5, 0.9' (C. Wyatt, 0.25-m Newtonian reflector)
2017 Jan. 30.68, 13.6, 0.8' (C. Wyatt, 0.25-m Newtonian reflector)
2017 Jan. 30.46, 11.4, 15' (T. Lehmann, 0.106-m refractor)
2017 Jan. 29.99, 12.2, 1.4' (J. Bohusz, Myślin Poland, 0.38-m Newtonian reflector)
2017 Jan. 29.92, 12.8, 2.8' (J. Cerny, 0.35-m Newtonian reflector)
2017 Jan. 29.71, 13.0, 0.9' (P. Camilleri, 0.406-m Newtonian reflector)
2017 Jan. 29.68, 13.9, 0.7' (C. Wyatt, 0.25-m Newtonian reflector)
2017 Jan. 29.14, 12.1, 2' (P. Guzik, 0.326-m Newtonian reflector)

43P/Wolf-Harrington
Total-magnitude and coma-diameter estimates:
2017 Feb. 19.19, 12.7, 0.6' (K. Hills, 0.5-m Newtonian reflector)
2017 Feb. 05.74, 14.5, 0.6' (R. Ramlow, 0.406-m Newtonian reflector; 13.2' tail in p.a. 300)
2017 Feb. 01.28, 12.8, 0.6' (K. Hills, 0.5-m Newtonian reflector)

45P/Honda-Mrkos-Pajdusakova
Total-magnitude and coma-diameter estimates:
2017 Feb. 27.04, 8.2, 20' (P. Guzik, 10x50 binoculars)
2017 Feb. 26.84, 9.3, 12' (J. Cerny, 0.355-m Newtonian reflector; 0.6-deg tail in p.a. 280)
2017 Feb. 26.83, 10.2, 5.4' (W. Hasubick, 0.44-m Newtonian reflector)
2017 Feb. 25.81, 8.7, 15' (W. Vollmann, 0.054-m refractor; 0.5-deg tail in p.a. 285)
2017 Feb. 25.16, 8.8, 15' (W. Vollmann, 0.054-m refractor; 1.0-deg tail in p.a. 275)
2017 Feb. 25.09, 8.5, 12' (J. Warell, Lindby Observatory (K60), Skurup, Sweden , 20x100 binoculars)
2017 Feb. 24.99, 10.3, 6' (T. Karhula, Lysvik, Sweden, 0.305-m Newtonian reflector)
2017 Feb. 24.98, 8.4, 15' (P. Guzik, 10x50 binoculars; 0.5-deg tail in p.a. 250)
2017 Feb. 24.93, 10.0, 5' (M. Meyer, 0.254-m Newtonian reflector)
2017 Feb. 24.93, [10.2, 5' (M. Biely, Czech Republic, Brno, 20x80 binoculars)
2017 Feb. 24.91, 9.0, 8' (A. Scholten, Bussloo, 15x80 binoculars)
2017 Feb. 24.91, 7.8, 12' (J. Gonzalez Suarez, 10x50 binoculars; 1.2-deg tail in p.a. 290)
2017 Feb. 24.89, 9.0, 5.5' (C. Harder, Jeersdorf, Germany , 0.406-m Newtonian reflector; 15.0' tail in p.a. 290)
2017 Feb. 23.96, 10.4, 4.6' (K. Hills, 0.5-m Newtonian reflector)
2017 Feb. 23.64, 8.0, 22.1' (C. Wyatt, 7x50 binoculars)
2017 Feb. 22.85, 7.7, 12' (J. Gonzalez Suarez, 10x50 binoculars; 0.7-deg tail in p.a. 290)
2017 Feb. 22.35, 7.3, 55' (T. Lehmann, 0.106-m refractor; 1.4-deg tail in p.a. 288)
2017 Feb. 22.19, 8.6, 10' (M. Goiato, 20x100 binoculars)
2017 Feb. 21.96, 11.4, 4.5' (K. Hills, 0.5-m Newtonian reflector)
2017 Feb. 21.24, 7.6, 17' (C. Hergenrother, 10x50 binoculars)
2017 Feb. 21.22, 7.8, 12' (J. Gonzalez Suarez, 10x50 binoculars)
2017 Feb. 20.57, 7.6, 15.1' (C. Wyatt, 7x50 binoculars)
2017 Feb. 19.99, 7.9, 10.4' (K. Hills, 0.5-m Newtonian reflector)
2017 Feb. 19.69, 8.3, 10' (P. Camilleri, 0.08-m refractor)
2017 Feb. 19.27, 8.2, 25' (R. Ramlow, 0.15-m Newtonian reflector)
2017 Feb. 19.04, 6.8, 60' (T. Lehmann, 0.075-m reflector; 2.6-deg tail in p.a. 291)
2017 Feb. 19.00, 8.3, 10' (M. Meyer, 0.254-m Newtonian reflector)
2017 Feb. 18.99, 8.0, 3.8' (W. Kutschera, 0.54-m Newtonian reflector)
2017 Feb. 18.97, 8.2, 15' (A. Scholten, Eerbeek, 15x80 binoculars)
2017 Feb. 18.94, 8.1, 22' (C. Harder, Jeersdorf, Germany , 15x70 binoculars)
2017 Feb. 17.99, 7.3, 19' (C. Labordena, Culla, 11x80 binoculars)
2017 Feb. 17.99, 9.5, 7' (K. Hills, 0.5-m Newtonian reflector)
2017 Feb. 17.35, 6.6, 60' (T. Lehmann, 0.106-m refractor)
2017 Feb. 17.28, 7.7, 26' (R. Ramlow, 0.15-m Newtonian reflector)
2017 Feb. 16.97, 7.9, 12' (J. Gonzalez Suarez, 25x100 binoculars)
2017 Feb. 16.96, 7.5, 15' (J. Gonzalez Suarez, 10x50 binoculars)
2017 Feb. 16.17, 6.5, 55' (T. Lehmann, 0.068-m reflector; 2.7-deg tail in p.a. 299)
2017 Feb. 15.91, 7.1, 30' (U. Pilz, 7x50 binoculars)
2017 Feb. 15.91, 7.1, 16.4' (W. Hasubick, 0.1-m refractor)
2017 Feb. 15.90, 10.0, 5' (C. Harder, Jeersdorf, Germany , 0.406-m Newtonian reflector)
2017 Feb. 15.88, 7.8, 30' (M. Buechner, Bavarian alpes, 10x70 binoculars)
2017 Feb. 15.88, 8.9, 15' (M. Biely, Czech Republic, Brno, 20x80 binoculars)
2017 Feb. 15.87, 6.8, 30' (P. Guzik, 10x50 binoculars)
2017 Feb. 15.86, 8.3, 24' (J. Cerny, 8x40 binoculars)
2017 Feb. 15.20, 9.8, 6' (G. Scheerle, 0.235-m Schmidt-Cassegrain)
2017 Feb. 14.49, [ 7.3, -- (S. Aguirre, Hillo, Mexico, 7x50 binoculars)
2017 Feb. 14.19, 8.2, 18' (W. Vollmann, 0.054-m refractor)
2017 Feb. 12.50, 7.3, -- (S. Aguirre, Hermosillo, Mexico, 7x50 binoculars)
2017 Feb. 11.52, [ 6.7, -- (S. Aguirre, Hermosillo, Sonora, Mexico, 7x50 binoculars)
2017 Feb. 10.53, 6.7, 15' (S. Aguirre, Hermosillo, Sonora, Mexico, 7x50 binoculars)
2017 Feb. 10.51, 6.6, 19' (R. Ramlow, 0.25-m Newtonian reflector)
2017 Feb. 10.50, 5.9, 60' (T. Lehmann, 0.106-m refractor)
2017 Feb. 09.54, 6.4, 34' (C. Hergenrother, 10x50 binoculars)
2017 Feb. 09.51, 6.5, 15' (S. Aguirre, Hermosillo, Sonora, Mexico, 7x50 binoculars)
2017 Feb. 09.51, 6.5, 19' (R. Ramlow, 0.25-m Newtonian reflector)
2017 Feb. 09.49, 6.1, 45' (T. Lehmann, 0.106-m refractor; 1.8-deg tail in p.a. 327)
2017 Feb. 09.22, 7.6, 12' (G. Scheerle, 8x56 binoculars)
2017 Feb. 09.20, 6.2, 30' (W. Vollmann, 0.025-m refractor)
2017 Feb. 08.24, 6.7, 22' (J. Gonzalez Suarez, 0.04-m refractor)
2017 Feb. 08.23, 8.3, 6' (C. Labordena, Benlloch, 11x80 binoculars)
2017 Feb. 06.83, 6.9, 16' (S. Yoshida, 0.07-m refractor)
2017 Feb. 06.82, 7.9, 11' (S. Yoshida, 0.4-m Newtonian reflector)
2017 Feb. 06.26, 7.8, 4.2' (K. Hills, 0.5-m Newtonian reflector)
2017 Feb. 05.20, 7.5, 12' (M. Buechner, Kempten, 10x70 binoculars)

56P/Slaughter-Burnham
Total-magnitude and coma-diameter estimates:
2017 Feb. 14.02, 16.3, 0.2' (K. Hills, 0.5-m Newtonian reflector)

65P/Gunn
Total-magnitude and coma-diameter estimates:
2017 Feb. 26.23, 13.1, 0.5' (K. Hills, 0.5-m Newtonian reflector)

71P/Clark
Total-magnitude and coma-diameter estimates:
2017 Feb. 23.46, 16.1, 1.6' (T. Lehmann, 0.106-m refractor; 0.01-deg tail in p.a. 259)
2017 Feb. 10.73, 16.9, 0.2' (R. Ramlow, 0.406-m Newtonian reflector)

73P-BT/Schwassmann-Wachmann
Total-magnitude and coma-diameter estimates:
2017 Feb. 23.77, 11.1, 1.4' (P. Camilleri, 0.506-m Newtonian reflector)
2017 Feb. 23.72, 11.9, 1.1' (C. Wyatt, 0.25-m Newtonian reflector)
2017 Feb. 22.76, 10.8, 1' (P. Camilleri, 0.406-m Newtonian reflector)
2017 Feb. 19.71, 11.0, 1.3' (P. Camilleri, Warners Bay, 0.406-m Newtonian reflector)
2017 Feb. 17.72, 10.8, 1' (C. Wyatt, 0.25-m Newtonian reflector)
2017 Feb. 11.35, 12.0, 0.79' (J. Cerny, 0.305-m Schmidt-Cassegrain)
2017 Feb. 11.35, 12.3, 0.72' (J. Cerny, 0.305-m Schmidt-Cassegrain)

74P/Smirnova-Chernykh
Total-magnitude and coma-diameter estimates:
2017 Feb. 21.26, 16.3, 0.27' (R. Ramlow, 0.25-m Newtonian reflector; 0.4' tail in p.a. 260)
2017 Feb. 15.89, 16.1, 0.2' (K. Hills, 0.5-m Newtonian reflector)
2017 Feb. 01.17, 15.9, 0.33' (R. Ramlow, 0.25-m Newtonian reflector)

93P/Lovas
Total-magnitude and coma-diameter estimates:
2017 Feb. 14.76, 12.8, 1.6' (G. Scheerle, 0.235-m Schmidt-Cassegrain)
2017 Feb. 13.76, 13.0, 0.8' (G. Scheerle, 0.235-m Schmidt-Cassegrain)

94P/Russell
Total-magnitude and coma-diameter estimates:
2017 Jan. 30.29, 18.1, 0.2' (K. Hills, 0.5-m Newtonian reflector)

128P/Shoemaker-Holt
Total-magnitude and coma-diameter estimates:
2017 Feb. 25.89, 16.4, 0.2' (K. Hills, 0.5-m Newtonian reflector)
2017 Feb. 15.85, 18.0, 0.2' (K. Hills, 0.5-m Newtonian reflector)

144P/Kushida
Total-magnitude and coma-diameter estimates:
2017 Feb. 21.20, 14.1, 0.6' (K. Hills, 0.5-m Newtonian reflector)
2017 Feb. 05.74, 14.3, 1.7' (R. Ramlow, 0.406-m Newtonian reflector)
2017 Jan. 29.50, 13.0, 9' (T. Lehmann, 0.106-m refractor)

174P/Echeclus
Total-magnitude and coma-diameter estimates:
2017 Feb. 16.85, 17.7, 0.2' (K. Hills, 0.5-m Newtonian reflector)
2017 Feb. 13.87, 18.0, 0.2' (K. Hills, 0.5-m Newtonian reflector)

183P/Korlevic-Juric
Total-magnitude and coma-diameter estimates:
2017 Feb. 17.01, 19.7, 0.2' (K. Hills, 0.5-m Newtonian reflector)

226P/Pigott-LINEAR-Kowalski
Total-magnitude and coma-diameter estimates:
2017 Feb. 15.88, 17.3, 0.2' (K. Hills, 0.5-m Newtonian reflector)

314P/Montani
Total-magnitude and coma-diameter estimates:
2017 Feb. 18.01, 16.0, 0.2' (K. Hills, 0.5-m Newtonian reflector)

315P/LONEOS
Total-magnitude and coma-diameter estimates:
2017 Feb. 26.83, 14.3, 0.9' (J. Cerny, 0.355-m Newtonian reflector)
2017 Feb. 24.96, 14.3, 0.4' (T. Karhula, Lysvik, Sweden, 0.305-m Newtonian reflector)
2017 Feb. 21.26, 14.5, 0.6' (K. Hills, 0.5-m Newtonian reflector)
2017 Feb. 17.24, 14.2, 0.6' (R. Ramlow, 0.25-m Newtonian reflector; 1.8' tail in p.a. 275)

C/2011 KP36 (Spacewatch)
Total-magnitude and coma-diameter estimates:
2017 Feb. 16.09, 14.8, 0.9' (R. Ramlow, 0.431-m Newtonian reflector)

C/2013 US10 (Catalina)
Total-magnitude and coma-diameter estimates:
2017 Feb. 14.01, 14.8, 0.2' (K. Hills, 0.5-m Newtonian reflector)

C/2013 V4 (Catalina)
Total-magnitude and coma-diameter estimates:
2017 Feb. 24.20, 15.3, 0.4' (K. Hills, 0.5-m Newtonian reflector)
2017 Feb. 16.98, 14.5, 0.4' (K. Hills, 0.5-m Newtonian reflector)
2017 Feb. 04.10, 15.3, 0.4' (K. Hills, 0.5-m Newtonian reflector)

C/2013 X1 (PANSTARRS)
Total-magnitude and coma-diameter estimates:
2017 Feb. 08.73, 16.9, 0.2' (R. Ramlow, 0.406-m Newtonian reflector)
2017 Jan. 29.29, 16.0, 0.2' (K. Hills, 0.5-m Newtonian reflector; 6.0' tail in p.a. 323)

C/2014 B1 (Schwartz)
Total-magnitude and coma-diameter estimates:
2017 Feb. 23.28, 15.4, 0.6' (R. Ramlow, 0.25-m Newtonian reflector)

C/2014 W2 (PANSTARRS)
Total-magnitude and coma-diameter estimates:
2017 Feb. 26.27, 14.8, 0.6' (K. Hills, 0.5-m Newtonian reflector)

C/2015 ER61 (PANSTARRS)
Total-magnitude and coma-diameter estimates:
2017 Feb. 28.31, 11.3, 1' (M. Goiato, 0.22-m Newtonian reflector)
2017 Feb. 23.77, 10.4, 1.8' (R. Ramlow, 0.406-m Newtonian reflector; 2.1' tail in p.a. 270)
2017 Feb. 23.76, 10.6, 2' (P. Camilleri, 0.406-m Newtonian reflector)
2017 Feb. 23.67, 10.9, 3' (C. Wyatt, 0.25-m Newtonian reflector; 3.6' tail in p.a. 286)
2017 Feb. 23.25, 11.4, 0.6' (K. Hills, 0.5-m Newtonian reflector)
2017 Feb. 22.73, 11.3, 1.8' (P. Camilleri, 0.406-m Newtonian reflector)
2017 Feb. 21.21, 9.5, 4' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain)
2017 Feb. 20.72, 10.8, 1.5' (P. Camilleri, 0.406-m Newtonian reflector)
2017 Feb. 20.67, 11.0, 1.4' (C. Wyatt, 0.25-m Newtonian reflector)
2017 Feb. 19.70, 10.5, 1.5' (P. Camilleri, 0.406-m Newtonian reflector)
2017 Feb. 17.68, 11.0, 1.4' (C. Wyatt, 0.25-m Newtonian reflector)
2017 Feb. 10.52, 10.4, 9' (T. Lehmann, 0.106-m refractor)
2017 Feb. 08.75, 10.3, 12' (T. Lehmann, 0.4-m Newtonian reflector; 0.18-deg tail in p.a. 273)
2017 Feb. 08.72, 10.8, 2.6' (R. Ramlow, 0.406-m Newtonian reflector; 5.9' tail in p.a. 275)
2017 Feb. 06.81, 11.4, 1.2' (S. Yoshida, 0.4-m Newtonian reflector)
2017 Feb. 06.27, 11.0, 1.1' (K. Hills, 0.5-m Newtonian reflector)
2017 Feb. 05.72, 11.5, 1.5' (P. Camilleri, 0.406-m Newtonian reflector)
2017 Feb. 01.71, 11.2, 2.5' (C. Wyatt, 0.25-m Newtonian reflector)
2017 Feb. 01.24, 10.7, 1.2' (K. Hills, 0.5-m Newtonian reflector)
2017 Jan. 31.70, 11.5, 1.2' (C. Wyatt, 0.25-m Newtonian reflector)
2017 Jan. 30.71, 12.0, 1' (C. Wyatt, 0.25-m Newtonian reflector)
2017 Jan. 30.51, 11.1, 9' (T. Lehmann, 0.106-m refractor; 0.12-deg tail in p.a. 276)
2017 Jan. 29.72, 12.5, 1' (P. Camilleri, 0.406-m Newtonian reflector)
2017 Jan. 29.70, 12.0, 1.1' (C. Wyatt, 0.25-m Newtonian reflector)
2017 Jan. 29.52, 11.0, 9' (T. Lehmann, 0.106-m refractor; 0.09-deg tail in p.a. 279)
2017 Jan. 29.17, 11.9, 2' (P. Guzik, 0.326-m Newtonian reflector)

C/2015 V1 (PANSTARRS)
Total-magnitude and coma-diameter estimates:
2017 Feb. 15.98, 15.8, 0.3' (K. Hills, 0.5-m Newtonian reflector)

C/2015 V2 (Johnson)
Total-magnitude and coma-diameter estimates:
2017 Feb. 27.05, 10.2, 2.5' (P. Guzik, 0.08-m refractor)
2017 Feb. 26.92, 11.0, 1' (W. Hasubick, 0.44-m Newtonian reflector; 0.07-deg tail in p.a. 305)
2017 Feb. 25.16, 10.9, 3' (J. Warell, Lindby Observatory (K60), Skurup, Sweden , 40x100 binoculars)
2017 Feb. 25.00, 9.7, 4' (P. Guzik, 10x50 binoculars)
2017 Feb. 24.99, 10.3, 2' (P. Guzik, 0.27-m Newtonian reflector; 0.15-deg tail in p.a. 300)
2017 Feb. 24.99, 9.9, 4' (J. Gonzalez Suarez, 25x100 binoculars)
2017 Feb. 24.95, 11.5, 1' (A. Scholten, Bussloo, 0.356-m Schmidt-Cassegrain)
2017 Feb. 24.94, [10.3, 2' (M. Biely, Czech Republic, Brno, 20x80 binoculars)
2017 Feb. 24.90, 10.8, 0.9' (C. Harder, Jeersdorf, Germany , 0.406-m Newtonian reflector; 3.0' tail in p.a. 335)
2017 Feb. 24.88, 10.3, 1.5' (T. Karhula, Lysvik, Sweden, 0.305-m Newtonian reflector; 3.0' tail in p.a. 305)
2017 Feb. 24.01, 10.2, 2' (M. Collins, Everton, 0.254-m Schmidt-Cassegrain; 3.5' tail in p.a. 289)
2017 Feb. 23.73, 10.8, 3.3' (C. Wyatt, 0.25-m Newtonian reflector)
2017 Feb. 22.36, 9.9, 16' (T. Lehmann, 0.106-m refractor; 0.2-deg tail in p.a. 320)
2017 Feb. 22.05, 10.2, 1.1' (K. Hills, 0.5-m Newtonian reflector)
2017 Feb. 21.86, 11.0, 1' (A. Novichonok, 0.2-m Newtonian reflector)
2017 Feb. 19.90, 11.1, 1' (A. Novichonok, 0.2-m Newtonian reflector)
2017 Feb. 19.15, 9.9, 16' (T. Lehmann, 0.075-m reflector; 0.25-deg tail in p.a. 322)
2017 Feb. 19.10, 10.8, 1.6' (W. Kutschera, 0.54-m Newtonian reflector; 0.13-deg tail)
2017 Feb. 19.02, 10.6, 1.5' (M. Meyer, 0.254-m Newtonian reflector)
2017 Feb. 18.99, 10.7, 2' (A. Scholten, Eerbeek, 0.2-m Newtonian reflector)
2017 Feb. 18.94, 10.7, 1.2' (C. Harder, Jeersdorf, Germany , 0.252-m Newtonian reflector)
2017 Feb. 18.09, 10.0, 1.9' (K. Hills, 0.5-m Newtonian reflector; 6.5-deg tail in p.a. 320)
2017 Feb. 18.06, 10.5, 2.5' (M. Collins, Everton, 0.254-m Schmidt-Cassegrain)
2017 Feb. 18.03, 10.7, 2' (C. Labordena, Culla, 0.2-m Schmidt-Cassegrain)
2017 Feb. 16.98, 10.4, 3' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain)
2017 Feb. 16.21, 10.0, 16' (T. Lehmann, 0.068-m reflector; 0.13-deg tail in p.a. 321)
2017 Feb. 15.89, 11.5, 1.2' (C. Harder, Jeersdorf, Germany , 0.406-m Newtonian reflector)
2017 Feb. 15.89, [10.1, 1.5' (M. Biely, Czech Republic, Brno, 20x80 binoculars)
2017 Feb. 15.88, 10.8, 1.2' (J. Cerny, 0.35-m Newtonian reflector; 0.1-deg tail in p.a. 300)
2017 Feb. 15.86, 10.6, 1.5' (P. Guzik, 0.326-m Newtonian reflector)
2017 Feb. 15.22, 11.2, 2.2' (G. Scheerle, 0.235-m Schmidt-Cassegrain)
2017 Feb. 11.51, 10.0, 15' (T. Lehmann, 0.106-m refractor; 0.17-deg tail in p.a. 322)
2017 Feb. 10.43, 10.5, 2.5' (R. Ramlow, 0.25-m Newtonian reflector; 7.4' tail in p.a. 315)
2017 Feb. 06.79, 11.6, 2.5' (S. Yoshida, 0.4-m Newtonian reflector; 4.5' tail in p.a. 310)
2017 Feb. 06.28, 10.8, 1.6' (K. Hills, 0.5-m Newtonian reflector; 7.5' tail in p.a. 324)
2017 Feb. 06.12, 10.6, 3' (M. Collins, Everton, 0.254-m Schmidt-Cassegrain)
2017 Feb. 05.17, 11.5, 0.6' (W. Hasubick, 0.44-m Newtonian reflector; 0.07-deg tail in p.a. 290)
2017 Feb. 04.12, 10.2, 3' (M. Collins, Everton, 0.254-m Schmidt-Cassegrain; 2.0' tail in p.a. 318)
2017 Feb. 03.41, 10.6, 4' (R. Ramlow, 0.25-m Newtonian reflector; 8.7' tail in p.a. 311)
2017 Feb. 03.25, 10.5, 4' (M. Collins, Everton, 0.254-m Schmidt-Cassegrain; 4.0' tail in p.a. 310)
2017 Feb. 02.53, 10.7, 1.28' (N. Paul, Mayhill, New Mexico (MPC Code - H06), 0.431-m Cassegrain reflector)
2017 Feb. 02.43, 10.3, 20' (T. Lehmann, 0.106-m refractor; 0.19-deg tail in p.a. 322)
2017 Feb. 02.28, 11.1, 1.5' (K. Hills, 0.5-m Newtonian reflector; 5.0' tail in p.a. 321)
2017 Jan. 30.75, 12.0, -- (D. Buczynski, Tarbatness MPC Code I81, 0.3-m Newtonian reflector)
2017 Jan. 30.50, 10.4, 16' (T. Lehmann, 0.106-m refractor; 0.19-deg tail in p.a. 322)
2017 Jan. 30.06, 10.7, 2.5' (J. Bohusz, Myślin Poland, 0.38-m Newtonian reflector)
2017 Jan. 29.93, 11.6, 2.3' (J. Cerny, 0.35-m Newtonian reflector)
2017 Jan. 29.28, 11.2, 1.5' (K. Hills, 0.5-m Newtonian reflector)
2017 Jan. 29.22, 11.2, 2.4' (M. Collins, Everton, 0.254-m Schmidt-Cassegrain; 3.3' tail in p.a. 300)
2017 Jan. 29.15, 11.3, 1.5' (P. Guzik, 0.326-m Newtonian reflector; 0.08-deg tail in p.a. 315)
2017 Jan. 29.03, 11.0, 2' (C. Labordena, Benlloch, 2.0-m Schmidt-Cassegrain)

C/2015 X7 (ATLAS)
Total-magnitude and coma-diameter estimates:
2017 Feb. 21.28, 16.8, 0.4' (K. Hills, 0.5-m Newtonian reflector)

C/2016 A1 (PANSTARRS)
Total-magnitude and coma-diameter estimates:
2017 Feb. 16.99, 15.4, 0.4' (K. Hills, 0.5-m Newtonian reflector)
2017 Feb. 03.10, 15.9, 0.3' (K. Hills, 0.5-m Newtonian reflector)

C/2016 A3 (PANSTARRS)
Total-magnitude and coma-diameter estimates:
2017 Feb. 21.22, 17.8, 0.2' (K. Hills, 0.5-m Newtonian reflector)

C/2016 M1 (PANSTARRS)
Total-magnitude and coma-diameter estimates:
2017 Feb. 16.51, 17.1, 0.9' (T. Lehmann, 0.106-m refractor)

C/2016 R2 (PANSTARRS)
Total-magnitude and coma-diameter estimates:
2017 Feb. 23.44, 14.9, -- (G. van Buitenen, Siding Spring, Australia (MPC Q62), 0.431-m Ritchey-Chretien)
2017 Feb. 20.42, 14.7, 3' (T. Lehmann, 0.4-m Newtonian reflector)
2017 Feb. 16.86, 13.8, 0.5' (K. Hills, 0.5-m Newtonian reflector)
2017 Feb. 02.11, 14.9, 0.6' (R. Ramlow, 0.25-m Newtonian reflector)

C/2016 VZ18 (PANSTARRS)
Total-magnitude and coma-diameter estimates:
2017 Feb. 25.15, 14.3, 1.2' (R. Ramlow, 0.106-m Newtonian reflector)
2017 Feb. 24.87, 10.7, 3' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain)

C/2017 A1 (PANSTARRS)
Total-magnitude and coma-diameter estimates:
2017 Feb. 13.88, 17.3, 0.2' (K. Hills, 0.5-m Newtonian reflector)

C/2017 B3 (LINEAR)
Total-magnitude and coma-diameter estimates:
2017 Feb. 21.17, 17.3, 0.2' (K. Hills, 0.5-m Newtonian reflector)
2017 Jan. 30.16, 18.7, 0.2' (K. Hills, 0.5-m Newtonian reflector)

P/2015 TP200 (LINEAR)
Total-magnitude and coma-diameter estimates:
2017 Feb. 13.90, 16.0, 0.2' (K. Hills, 0.5-m Newtonian reflector)
2017 Feb. 02.89, 16.0, 0.3' (K. Hills, 0.5-m Newtonian reflector)