Recent Comet Brightness Estimates

7P/Pons-Winnecke
Total-magnitude and coma-diameter estimates:
2021 Jan. 23.29, 18.8, 0.4' (K. Hills, Comphot version 1.2.6, 0.5-m Newtonian reflector)
2021 Jan. 11.23, 19.7, 0.4' (P. Carson, Fregenal de la Sierra Spain, 0.315-m Cassegrain reflector)

9P/Tempel 1
Total-magnitude and coma-diameter estimates:
2021 Jan. 17.98, 19.7, 0.4' (K. Hills, Comphot version 1.2.6, 0.5-m Newtonian reflector)
2021 Jan. 14.19, 19.0, 0.4' (K. Hills, Comphot version 1.2.6, 0.5-m Newtonian reflector)
2021 Jan. 13.00, 19.3, 0.4' (P. Carson, Fregenal de la Sierra Spain, 0.315-m Cassegrain reflector)

11P/Tempel-Swift-LINEAR
Total-magnitude and coma-diameter estimates:
2021 Jan. 17.91, 17.9, 0.4' (P. Carson, Fregenal de la Sierra Spain, 0.315-m Cassegrain reflector)
2021 Jan. 12.91, 16.8, 0.6' (P. Carson, Fregenal de la Sierra Spain, 0.315-m Cassegrain reflector)
2021 Jan. 10.87, 16.7, 0.4' (K. Hills, Comphot version 1.2.6, 0.5-m Newtonian reflector)
2021 Jan. 05.08, 14.7, 3.6' (T. Lehmann, Mayhill (remote), 0.28-m Newtonian reflector)
2020 Dec. 30.85, 17.2, 0.4' (P. Carson, Fregenal de la Sierra Spain, 0.315-m Cassegrain reflector)

22P/Kopff
Total-magnitude and coma-diameter estimates:
2021 Jan. 18.08, 18.3, 0.4' (K. Hills, Comphot version 1.2.6, 0.5-m Newtonian reflector)

29P/Schwassmann-Wachmann
Total-magnitude and coma-diameter estimates:
2021 Jan. 19.82, 14.5, 0.6' (K. Hills, Comphot version 1.2.6, 0.5-m Newtonian reflector)
2021 Jan. 18.91, 14.3, 0.8' (K. Hills, Comphot version 1.2.6, 0.5-m Newtonian reflector)
2021 Jan. 18.86, 14.2, 1.2' (P. Carson, Fregenal de la Sierra Spain, 0.315-m Cassegrain reflector)
2021 Jan. 17.89, 13.6, 2.4' (P. Carson, Fregenal de la Sierra Spain, 0.315-m Cassegrain reflector)
2021 Jan. 16.92, 12.7, 6.5' (T. Lehmann, Nerpio (remote), 0.2-m Newtonian reflector)
2021 Jan. 16.85, 13.8, 1.3' (P. Carson, Fregenal de la Sierra Spain, 0.315-m Cassegrain reflector)
2021 Jan. 15.94, 13.8, 1.7' (P. Carson, Fregenal de la Sierra Spain, 0.315-m Cassegrain reflector)
2021 Jan. 15.91, 15.0, -- (J. Warell, Lindby Observatory (K60), Skurup, Sweden , 0.52-m Newtonian reflector)
2021 Jan. 15.88, 13.8, 2.3' (P. Carson, Fregenal de la Sierra Spain, 0.315-m Cassegrain reflector)
2021 Jan. 13.92, 12.9, 3.6' (P. Carson, Fregenal de la Sierra Spain, 0.315-m Cassegrain reflector)
2021 Jan. 13.82, 10.8, 6' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain)
2021 Jan. 13.47, [14.4, -- (C. Wyatt, 0.25-m Newtonian reflector)
2021 Jan. 12.97, 14.2, 1.9' (P. Carson, Fregenal de la Sierra Spain, 0.315-m Cassegrain reflector)
2021 Jan. 12.84, 13.6, 3.6' (P. Carson, Fregenal de la Sierra Spain, 0.315-m Cassegrain reflector)
2021 Jan. 12.82, 14.1, 1.5' (K. Hills, Comphot version 1.2.6, 0.5-m Newtonian reflector)
2021 Jan. 11.46, [14.3, -- (C. Wyatt, 0.25-m Newtonian reflector)
2021 Jan. 10.82, 13.9, 1.3' (K. Hills, Comphot version 1.2.6, 0.5-m Newtonian reflector)
2021 Jan. 10.81, 12.5, 7.5' (S. Fritsche, Koeditz, 0.1-m refractor)
2021 Jan. 09.82, 13.7, 1.5' (K. Hills, Comphot version 1.2.6, 0.5-m Newtonian reflector)
2021 Jan. 08.72, 14.2, 1' (G. Pappa, Nicolosi, Sicily , 0.3-m reflector)
2021 Jan. 08.21, 12.5, 8.6' (T. Lehmann, Mayhill (remote), 0.28-m Newtonian reflector)
2021 Jan. 07.82, 11.0, 6' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain)
2021 Jan. 05.44, [13.5, -- (C. Wyatt, 0.25-m Newtonian reflector)
2021 Jan. 03.84, 11.8, 5.3' (P. Carson, Fregenal de la Sierra Spain, 0.315-m Cassegrain reflector)
2021 Jan. 02.85, 11.8, 5.2' (P. Carson, Fregenal de la Sierra Spain, 0.315-m Cassegrain reflector)
2020 Dec. 30.83, 14.8, 1' (P. Carson, Fregenal de la Sierra Spain, 0.315-m Cassegrain reflector)

36P/Whipple
Total-magnitude and coma-diameter estimates:
2021 Jan. 17.86, 18.5, 0.4' (K. Hills, Comphot version 1.2.6, 0.5-m Newtonian reflector)
2021 Jan. 10.90, 18.5, 0.4' (K. Hills, Comphot version 1.2.6, 0.5-m Newtonian reflector)

84P/Giclas
Total-magnitude and coma-diameter estimates:
2021 Jan. 17.95, 17.1, 0.6' (P. Carson, Fregenal de la Sierra Spain, 0.315-m Cassegrain reflector)

88P/Howell
Total-magnitude and coma-diameter estimates:
2021 Jan. 16.80, 10.0, 5' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain)
2021 Jan. 16.73, 11.9, 1' (G. Pappa, Catania, Sicily , 0.3-m reflector)
2021 Jan. 13.78, 10.1, 5' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain)
2021 Jan. 13.45, 12.3, 1.3' (C. Wyatt, 0.25-m Newtonian reflector)
2021 Jan. 11.69, 12.8, 0.7' (S. Szabo, Agfalva, 0.6-m Newtonian reflector)
2021 Jan. 11.44, 11.9, 1.8' (C. Wyatt, 0.25-m Newtonian reflector)
2021 Jan. 08.74, 12.3, 2.2' (G. van Buitenen, Dordrecht, NL (G06), 0.203-m Ritchey-Chretien)
2021 Jan. 07.79, 10.2, 5' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain)
2021 Jan. 04.06, 11.0, 8.6' (T. Lehmann, Mayhill (remote), 0.28-m Newtonian reflector; 0.08-deg tail in p.a. 249)
2021 Jan. 03.79, 11.4, 3.6' (P. Carson, Fregenal de la Sierra Spain, 0.315-m Cassegrain reflector)
2021 Jan. 01.08, 11.0, 7.2' (T. Lehmann, Mayhill (remote), 0.28-m Newtonian reflector; 0.1-deg tail in p.a. 246)
2020 Dec. 30.81, 12.0, 1.7' (P. Carson, Fregenal de la Sierra Spain, 0.315-m Cassegrain reflector)

95P/Chiron
Total-magnitude and coma-diameter estimates:
2021 Jan. 01.88, 17.7, 0.4' (K. Hills, Comphot version 1.2.6, 0.5-m Newtonian reflector)

117P/Helin-Roman-Alu
Total-magnitude and coma-diameter estimates:
2021 Jan. 23.22, 16.8, 0.4' (K. Hills, Comphot version 1.2.6, 0.5-m Newtonian reflector)
2021 Jan. 14.21, 16.8, 0.4' (K. Hills, Comphot version 1.2.6, 0.5-m Newtonian reflector)
2021 Jan. 11.20, 16.8, 0.4' (K. Hills, Comphot version 1.2.6, 0.5-m Newtonian reflector)

141P/Machholz
Total-magnitude and coma-diameter estimates:
2021 Jan. 19.73, 10.3, 3' (G. Pappa, Catania, Sicily , 0.3-m reflector)
2021 Jan. 16.81, 10.2, 4' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain)
2021 Jan. 16.73, 10.0, 2' (G. Pappa, Catania, Sicily , 0.3-m reflector)
2021 Jan. 16.08, 10.3, 15' (T. Lehmann, Mayhill (remote), 0.106-m refractor; 0.41-deg tail in p.a. 67)
2021 Jan. 15.86, 9.7, 10.7' (P. Carson, Fregenal de la Sierra Spain, 0.315-m Cassegrain reflector)
2021 Jan. 14.07, 10.4, 12' (T. Lehmann, Mayhill (remote), 0.106-m refractor; 0.34-deg tail in p.a. 68)
2021 Jan. 13.79, 9.8, 6' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain)
2021 Jan. 13.77, 10.0, 5' (C. Harder, Jeersdorf, f, 0.303-m Newtonian reflector)
2021 Jan. 13.74, 10.5, 10' (M. Jager, 0.11-m reflector; 0.25-deg tail in p.a. 61)
2021 Jan. 13.46, 10.6, 4' (C. Wyatt, 0.25-m Newtonian reflector)
2021 Jan. 12.73, 9.8, 5' (M. Meyer, 0.254-m Newtonian reflector)
2021 Jan. 11.81, 10.4, 6.8' (P. Carson, Fregenal de la Sierra Spain, 0.315-m Cassegrain reflector)
2021 Jan. 11.73, 9.9, 5' (P. Guzik, 25x100 binoculars)
2021 Jan. 11.72, 11.6, 2.1' (S. Szabo, Agfalva, 0.6-m Newtonian reflector)
2021 Jan. 11.44, 10.3, 4.2' (C. Wyatt, 0.25-m Newtonian reflector)
2021 Jan. 10.73, 10.2, 4.5' (M. Meyer, 0.254-m Newtonian reflector)
2021 Jan. 10.72, 10.2, 13' (S. Fritsche, Koeditz, 0.1-m refractor)
2021 Jan. 10.71, 10.1, 2.6' (U. Pilz, 0.32-m Newtonian reflector)
2021 Jan. 09.98, 10.4, 3' (M. Goiato, 0.22-m Newtonian reflector)
2021 Jan. 08.76, 10.8, 3' (G. van Buitenen, Dordrecht, NL (G06), 0.203-m Ritchey-Chretien)
2021 Jan. 08.74, 10.5, 3' (G. Pappa, Nicolosi, Sicily , 0.3-m reflector)
2021 Jan. 07.80, 10.1, 6' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain)
2021 Jan. 07.08, 10.2, 10' (T. Lehmann, Mayhill (remote), 0.28-m Newtonian reflector; 0.31-deg tail in p.a. 70)
2021 Jan. 06.48, 10.3, 4' (M. Mattiazzo, Swan Hill, Victoria, 0.2-m Newtonian reflector)
2021 Jan. 05.43, 10.5, 5' (C. Wyatt, 0.25-m Newtonian reflector)
2021 Jan. 04.07, 10.3, 10' (T. Lehmann, Mayhill (remote), 0.28-m Newtonian reflector; 0.05-deg tail in p.a. 72)
2021 Jan. 02.98, 10.3, 3' (M. Goiato, 0.22-m Newtonian reflector)
2021 Jan. 02.79, 10.6, 4.9' (P. Carson, Fregenal de la Sierra Spain, 0.315-m Cassegrain reflector)
2021 Jan. 01.85, 10.4, 6' (M. Masek, 0.25-m Schmidt-Cassegrain)
2021 Jan. 01.84, 12.1, 3.2' (M. Masek, 0.25-m Schmidt-Cassegrain)
2020 Dec. 31.71, 10.5, 6.5' (M. Jager, 0.3-m Newtonian reflector)

141P-B/Machholz
Total-magnitude and coma-diameter estimates:
2021 Jan. 16.11, 14.4, 4.4' (T. Lehmann, Mayhill (remote), 0.106-m refractor)
2021 Jan. 16.08, 14.2, 4.6' (T. Lehmann, Mayhill (remote), 0.106-m refractor)
2021 Jan. 14.07, 14.2, 4.9' (T. Lehmann, Mayhill (remote), 0.106-m refractor)
2021 Jan. 13.74, 15.2, 2' (M. Jager, 0.11-m reflector)
2021 Jan. 07.08, 14.0, 5.1' (T. Lehmann, Mayhill (remote), 0.28-m Newtonian reflector)
2020 Dec. 31.71, 16.0, 1.8' (M. Jager, 0.3-m Newtonian reflector)

141P-C/Machholz
Total-magnitude and coma-diameter estimates:
2021 Jan. 16.11, 14.7, 6.4' (T. Lehmann, Mayhill (remote), 0.106-m refractor)
2021 Jan. 13.74, 16.5, 2' (M. Jager, 0.11-m reflector)
2020 Dec. 31.71, 16.5, 1.8' (M. Jager, 0.3-m Newtonian reflector)

156P/Russell-LINEAR
Total-magnitude and coma-diameter estimates:
2021 Jan. 19.73, 12.1, 2' (G. Pappa, Catania, Sicily , 0.3-m reflector)
2021 Jan. 16.89, 11.0, 9.5' (T. Lehmann, Nerpio (remote), 0.2-m Newtonian reflector; 1.1' tail in p.a. 132)
2021 Jan. 16.83, 10.8, 3' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain)
2021 Jan. 15.91, 11.5, 4.9' (P. Carson, Fregenal de la Sierra Spain, 0.315-m Cassegrain reflector)
2021 Jan. 15.88, 12.3, 0.9' (J. Warell, Lindby Observatory (K60), Skurup, Sweden , 0.52-m Newtonian reflector)
2021 Jan. 13.81, 10.6, 5' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain)
2021 Jan. 13.78, 10.8, 4' (C. Labordena, La Serra Engarcera, 0.2-m Schmidt-Cassegrain)
2021 Jan. 13.76, 11.6, 1.5' (C. Harder, Jeersdorf, f, 0.303-m Newtonian reflector; 2.5' tail in p.a. 150)
2021 Jan. 13.47, 12.0, 1.7' (C. Wyatt, 0.25-m Newtonian reflector)
2021 Jan. 12.88, 11.3, 5.1' (P. Carson, Fregenal de la Sierra Spain, 0.315-m Cassegrain reflector)
2021 Jan. 12.74, 11.1, 2.5' (M. Meyer, 0.254-m Newtonian reflector)
2021 Jan. 11.76, 11.4, 0.8' (S. Szabo, Agfalva, 0.6-m Newtonian reflector)
2021 Jan. 11.45, 12.0, 2.3' (C. Wyatt, 0.25-m Newtonian reflector)
2021 Jan. 10.84, 10.9, 7' (M. Masek, 0.068-m reflector)
2021 Jan. 10.77, 10.9, 8' (M. Jager, 0.12-m Newtonian reflector; 5.0' tail in p.a. 110)
2021 Jan. 10.75, 10.9, 13' (S. Fritsche, Koeditz, 0.1-m refractor; 1.3' tail in p.a. 140)
2021 Jan. 10.74, 10.9, 2' (M. Meyer, 0.254-m Newtonian reflector)
2021 Jan. 10.72, 11.5, 1' (U. Pilz, 0.32-m Newtonian reflector)
2021 Jan. 09.87, 11.0, 2.5' (M. Meyer, 0.254-m Newtonian reflector)
2021 Jan. 09.84, 10.1, 4.9' (K. Hills, Comphot version 1.2.6, 0.5-m Newtonian reflector)
2021 Jan. 08.81, 12.5, 0.8' (G. van Buitenen, Dordrecht, NL (G06), 0.203-m Ritchey-Chretien)
2021 Jan. 07.84, 10.8, 4' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain)
2021 Jan. 07.10, 10.8, 11' (T. Lehmann, Mayhill (remote), 0.28-m Newtonian reflector; 0.05-deg tail in p.a. 109)
2021 Jan. 05.99, 11.6, 2' (J. de Souza Aguiar, 0.27-m Newtonian reflector)
2021 Jan. 05.44, 11.8, 0.9' (C. Wyatt, 0.25-m Newtonian reflector)
2021 Jan. 03.00, 11.0, 2' (M. Goiato, 0.22-m Newtonian reflector)
2021 Jan. 02.82, 10.8, 6.8' (P. Carson, Fregenal de la Sierra Spain, 0.315-m Cassegrain reflector)
2021 Jan. 01.10, 10.6, 12' (T. Lehmann, Mayhill (remote), 0.28-m Newtonian reflector; 0.06-deg tail in p.a. 103)
2020 Dec. 30.84, 11.0, 3.9' (P. Carson, Fregenal de la Sierra Spain, 0.315-m Cassegrain reflector)

162P/Siding Spring
Total-magnitude and coma-diameter estimates:
2021 Jan. 11.73, 14.7, 0.4' (S. Szabo, Agfalva, 0.6-m Newtonian reflector)

173P/Mueller
Total-magnitude and coma-diameter estimates:
2021 Jan. 17.99, 17.2, 0.4' (P. Carson, Fregenal de la Sierra Spain, 0.315-m Cassegrain reflector)
2021 Jan. 17.93, 16.9, 0.4' (K. Hills, Comphot version 1.2.6, 0.5-m Newtonian reflector)
2021 Jan. 12.96, 17.3, 0.4' (P. Carson, Fregenal de la Sierra Spain, 0.315-m Cassegrain reflector)
2021 Jan. 11.00, 17.6, 0.8' (S. Fritsche, Koeditz, 0.1-m refractor; 0.3' tail in p.a. 265)
2021 Jan. 10.97, 17.0, 0.4' (K. Hills, Comphot version 1.2.6, 0.5-m Newtonian reflector)

178P/Hug-Bell
Total-magnitude and coma-diameter estimates:
2021 Jan. 17.96, 17.7, 0.4' (K. Hills, Comphot version 1.2.6, 0.5-m Newtonian reflector)
2021 Jan. 17.96, 18.1, 0.4' (P. Carson, Fregenal de la Sierra Spain, 0.315-m Cassegrain reflector)

203P/Korlevic
Total-magnitude and coma-diameter estimates:
2021 Jan. 13.21, 18.2, 0.4' (K. Hills, Comphot version 1.2.6, 0.5-m Newtonian reflector)

277P/LINEAR
Total-magnitude and coma-diameter estimates:
2021 Jan. 17.84, 16.8, 0.4' (K. Hills, Comphot version 1.2.6, 0.5-m Newtonian reflector)
2021 Jan. 15.91, 13.9, 4.5' (T. Lehmann, Nerpio (remote), 0.2-m Newtonian reflector)
2021 Jan. 11.78, 15.7, 0.2' (S. Szabo, Agfalva, 0.6-m Newtonian reflector)
2021 Jan. 10.88, 14.9, 0.8' (K. Hills, Comphot version 1.2.6, 0.5-m Newtonian reflector)
2021 Jan. 08.72, 15.7, 0.5' (G. Pappa, Nicolosi, Sicily , 0.3-m reflector)
2021 Jan. 08.19, 14.4, 4' (T. Lehmann, Mayhill (remote), 0.28-m Newtonian reflector)
2021 Jan. 07.12, 14.7, 2.7' (T. Lehmann, Mayhill (remote), 0.28-m Newtonian reflector)

282P
Total-magnitude and coma-diameter estimates:
2021 Jan. 23.17, 17.9, 0.4' (K. Hills, Comphot version 1.2.6, 0.5-m Newtonian reflector)
2021 Jan. 13.25, 18.5, 0.4' (K. Hills, Comphot version 1.2.6, 0.5-m Newtonian reflector)

293P/Spacewatch
Total-magnitude and coma-diameter estimates:
2021 Jan. 18.01, 17.9, 0.4' (K. Hills, Comphot version 1.2.6, 0.5-m Newtonian reflector)
2021 Jan. 11.11, 18.1, 0.4' (K. Hills, Comphot version 1.2.6, 0.5-m Newtonian reflector)

304P/Ory
Total-magnitude and coma-diameter estimates:
2021 Jan. 18.00, 19.1, 0.4' (K. Hills, Comphot version 1.2.6, 0.5-m Newtonian reflector)

398P/Boattini
Total-magnitude and coma-diameter estimates:
2021 Jan. 23.63, 12.5, 0.8' (C. Wyatt, 0.4-m Newtonian reflector)
2021 Jan. 17.93, 12.6, 3' (P. Carson, Fregenal de la Sierra Spain, 0.315-m Cassegrain reflector)
2021 Jan. 17.90, 12.6, 2.3' (K. Hills, Comphot version 1.2.6, 0.5-m Newtonian reflector)
2021 Jan. 16.84, 12.7, 3.1' (T. Lehmann, Nerpio (remote), 0.2-m Newtonian reflector; 0.08-deg tail in p.a. 74)
2021 Jan. 16.82, 11.2, 4' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain)
2021 Jan. 15.98, 12.5, 1' (J. Warell, Lindby Observatory (K60), Skurup, Sweden , 0.52-m Newtonian reflector)
2021 Jan. 15.19, 13.5, 0.5' (N. Paul, La Dehesa , Chile, 0.35-m Schmidt-Cassegrain)
2021 Jan. 13.80, 10.8, 4' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain)
2021 Jan. 13.78, 11.9, 1' (C. Harder, Jeersdorf, f, 0.303-m Newtonian reflector)
2021 Jan. 13.48, 13.0, 0.6' (C. Wyatt, 0.25-m Newtonian reflector)
2021 Jan. 12.92, 11.8, 5.8' (P. Carson, Fregenal de la Sierra Spain, 0.315-m Cassegrain reflector)
2021 Jan. 11.80, 12.7, 0.8' (S. Szabo, Agfalva, 0.6-m Newtonian reflector)
2021 Jan. 11.47, 12.9, 0.9' (C. Wyatt, 0.25-m Newtonian reflector)
2021 Jan. 10.89, 12.0, 4.9' (S. Fritsche, Koeditz, 0.1-m refractor; 0.08-deg tail in p.a. 57)
2021 Jan. 10.76, 11.6, 2.5' (M. Meyer, 0.254-m Newtonian reflector)
2021 Jan. 10.73, 12.1, 1.3' (U. Pilz, 0.32-m Newtonian reflector)
2021 Jan. 10.00, 11.7, 1' (M. Goiato, 0.22-m Newtonian reflector)
2021 Jan. 09.94, 11.5, 3.8' (K. Hills, Comphot version 1.2.6, 0.5-m Newtonian reflector)
2021 Jan. 09.88, 11.6, 1.5' (M. Meyer, 0.254-m Newtonian reflector)
2021 Jan. 08.83, 13.1, 1' (G. van Buitenen, Dordrecht, NL (G06), 0.203-m Ritchey-Chretien)
2021 Jan. 08.73, 12.1, 2' (G. Pappa, Nicolosi, Sicily , 0.3-m reflector)
2021 Jan. 07.85, 11.2, 4' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain)
2021 Jan. 06.50, 11.9, 2' (M. Mattiazzo, Swan Hill, Victoria, 0.2-m Newtonian reflector)
2021 Jan. 05.98, 11.7, 3' (J. de Souza Aguiar, 0.27-m Newtonian reflector)
2021 Jan. 05.45, 12.5, 1.4' (C. Wyatt, 0.25-m Newtonian reflector)
2021 Jan. 05.09, 12.1, 4.8' (T. Lehmann, Mayhill (remote), 0.28-m Newtonian reflector; 0.15-deg tail in p.a. 39)
2021 Jan. 04.08, 11.7, 1' (M. Goiato, 0.22-m Newtonian reflector)
2021 Jan. 02.87, 12.0, 3.2' (P. Carson, Fregenal de la Sierra Spain, 0.315-m Cassegrain reflector)

400P/PANSTARRS
Total-magnitude and coma-diameter estimates:
2021 Jan. 07.78, 18.5, 0.2' (M. Jager, 0.12-m Newtonian reflector; 0.8' tail in p.a. 55)

402P/LINEAR
Total-magnitude and coma-diameter estimates:
2021 Jan. 10.84, 17.5, 0.4' (K. Hills, Comphot version 1.2.6, 0.5-m Newtonian reflector)

405P/Lemmon
Total-magnitude and coma-diameter estimates:
2021 Jan. 23.23, 18.2, 0.4' (K. Hills, Comphot version 1.2.6, 0.5-m Newtonian reflector)
2021 Jan. 19.19, 16.6, 1.5' (T. Lehmann, Nerpio (remote), 0.2-m Newtonian reflector)
2021 Jan. 17.23, 18.2, 0.4' (P. Carson, Fregenal de la Sierra Spain, 0.315-m Cassegrain reflector)
2021 Jan. 14.20, 17.5, 0.4' (K. Hills, Comphot version 1.2.6, 0.5-m Newtonian reflector)
2021 Jan. 13.47, 16.3, 1.7' (T. Lehmann, Mayhill (remote), 0.28-m Newtonian reflector; 2.0' tail in p.a. 296)
2021 Jan. 11.16, 17.2, 0.4' (K. Hills, Comphot version 1.2.6, 0.5-m Newtonian reflector)

409P/LONEOS-Hill
Total-magnitude and coma-diameter estimates:
2021 Jan. 23.17, 15.8, 0.4' (K. Hills, Comphot version 1.2.6, 0.5-m Newtonian reflector)
2021 Jan. 17.20, 16.5, 0.4' (P. Carson, Fregenal de la Sierra Spain, 0.315-m Cassegrain reflector)
2021 Jan. 13.23, 16.2, 0.4' (K. Hills, Comphot version 1.2.6, 0.5-m Newtonian reflector)
2021 Jan. 10.15, 16.0, 0.4' (K. Hills, Comphot version 1.2.6, 0.5-m Newtonian reflector)

C/2010 U3 (Boattini)
Total-magnitude and coma-diameter estimates:
2021 Jan. 19.08, 20.0, 0.5' (G. Pappa, Spain (remote control) , 0.2-m Cassegrain reflector)

C/2016 M1 (PANSTARRS)
Total-magnitude and coma-diameter estimates:
2021 Jan. 17.92, 17.8, 0.4' (K. Hills, Comphot version 1.2.6, 0.5-m Newtonian reflector)
2021 Jan. 10.96, 17.9, 0.4' (K. Hills, Comphot version 1.2.6, 0.5-m Newtonian reflector)

C/2017 K2 (PANSTARRS)
Total-magnitude and coma-diameter estimates:
2021 Jan. 18.29, 15.2, 0.4' (K. Hills, Comphot version 1.2.6, 0.5-m Newtonian reflector)
2021 Jan. 17.25, 14.6, 0.8' (P. Carson, Fregenal de la Sierra Spain, 0.315-m Cassegrain reflector)
2021 Jan. 16.53, 14.7, 1.4' (T. Lehmann, Mayhill (remote), 0.28-m Newtonian reflector; 0.06-deg tail in p.a. 348)
2021 Jan. 11.30, 14.7, 0.4' (K. Hills, Comphot version 1.2.6, 0.5-m Newtonian reflector)
2021 Jan. 11.25, 15.1, 0.6' (P. Carson, Fregenal de la Sierra Spain, 0.315-m Cassegrain reflector)

C/2018 F4 (PANSTARRS)
Total-magnitude and coma-diameter estimates:
2021 Jan. 12.85, 17.2, 0.4' (K. Hills, Comphot version 1.2.6, 0.5-m Newtonian reflector)
2021 Jan. 10.83, 17.0, 0.4' (K. Hills, Comphot version 1.2.6, 0.5-m Newtonian reflector)

C/2018 N2 (ASASSN)
Total-magnitude and coma-diameter estimates:
2021 Jan. 23.23, 14.6, 0.8' (K. Hills, Comphot version 1.2.6, 0.5-m Newtonian reflector)
2021 Jan. 13.26, 14.6, 0.6' (K. Hills, Comphot version 1.2.6, 0.5-m Newtonian reflector)
2021 Jan. 11.24, 15.1, 0.8' (P. Carson, Fregenal de la Sierra Spain, 0.315-m Cassegrain reflector)
2021 Jan. 10.27, 14.5, 0.8' (K. Hills, Comphot version 1.2.6, 0.5-m Newtonian reflector)

C/2019 C1
Total-magnitude and coma-diameter estimates:
2021 Jan. 23.21, 17.3, 0.4' (K. Hills, Comphot version 1.2.6, 0.5-m Newtonian reflector)

C/2019 L3 (ATLAS)
Total-magnitude and coma-diameter estimates:
2021 Jan. 18.88, 13.3, 0.9' (P. Carson, Fregenal de la Sierra Spain, 0.315-m Cassegrain reflector)
2021 Jan. 17.85, 12.6, 0.9' (K. Hills, Comphot version 1.2.6, 0.5-m Newtonian reflector)
2021 Jan. 15.88, 13.8, 1.7' (T. Lehmann, Nerpio (remote), 0.2-m Newtonian reflector)
2021 Jan. 13.86, 13.4, 1.2' (P. Carson, Fregenal de la Sierra Spain, 0.315-m Cassegrain reflector)
2021 Jan. 10.85, 13.9, 1.5' (S. Fritsche, Koeditz, 0.1-m refractor)
2021 Jan. 05.06, 13.7, 2' (T. Lehmann, Mayhill (remote), 0.28-m Newtonian reflector)
2021 Jan. 02.89, 13.5, 0.8' (P. Carson, Fregenal de la Sierra Spain, 0.315-m Cassegrain reflector)
2020 Dec. 31.80, 13.5, 0.5' (M. Smith, Heathwood Road, Cardiff, 0.203-m Schmidt-Cassegrain)

C/2019 N1 (ATLAS)
Total-magnitude and coma-diameter estimates:
2021 Jan. 25.70, 12.8, 2' (C. Wyatt, 0.4-m Newtonian reflector)
2021 Jan. 23.67, 13.2, 0.9' (C. Wyatt, 0.4-m Newtonian reflector)
2021 Jan. 23.27, 11.9, 1' (M. Goiato, 0.22-m Newtonian reflector)

C/2019 T4 (ATLAS)
Total-magnitude and coma-diameter estimates:
2021 Jan. 25.68, 14.2, 1' (C. Wyatt, 0.4-m Newtonian reflector)
2021 Jan. 23.64, 14.2, 0.9' (C. Wyatt, 0.4-m Newtonian reflector)
2021 Jan. 18.05, 14.6, 0.4' (K. Hills, Comphot version 1.2.6, 0.5-m Newtonian reflector)

C/2020 H6 (ATLAS)
Total-magnitude and coma-diameter estimates:
2021 Jan. 23.25, 16.9, 0.4' (K. Hills, Comphot version 1.2.6, 0.5-m Newtonian reflector)
2021 Jan. 11.28, 16.9, 0.4' (K. Hills, Comphot version 1.2.6, 0.5-m Newtonian reflector)

C/2020 M3 (ATLAS)
Total-magnitude and coma-diameter estimates:
2021 Jan. 19.84, 11.4, 4.5' (K. Hills, Comphot version 1.2.6, 0.5-m Newtonian reflector)
2021 Jan. 18.90, 11.9, 4.5' (P. Carson, Fregenal de la Sierra Spain, 0.315-m Cassegrain reflector)
2021 Jan. 16.85, 10.5, 4' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain)
2021 Jan. 15.94, 11.0, 10' (T. Lehmann, Nerpio (remote), 0.2-m Newtonian reflector; 1.9' tail in p.a. 220)
2021 Jan. 13.83, 10.3, 5' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain)
2021 Jan. 13.80, 11.0, 3' (C. Labordena, La Serra Engarcera, 0.2-m Schmidt-Cassegrain)
2021 Jan. 12.98, 13.8, 1.2' (P. Dekelver, 0.1-m refractor; 1.5' tail in p.a. 233)
2021 Jan. 12.94, 11.1, 7.7' (P. Carson, Fregenal de la Sierra Spain, 0.315-m Cassegrain reflector)
2021 Jan. 10.93, 10.6, 15' (S. Fritsche, Koeditz, 0.1-m refractor)
2021 Jan. 10.75, 11.4, 2.5' (M. Meyer, 0.254-m Newtonian reflector)
2021 Jan. 10.02, 10.4, 5.8' (K. Hills, Comphot version 1.2.6, 0.5-m Newtonian reflector)
2021 Jan. 09.89, 11.5, 3' (M. Meyer, 0.254-m Newtonian reflector)
2021 Jan. 08.71, 11.2, 1' (G. Pappa, Nicolosi, Sicily , 0.3-m reflector)
2021 Jan. 07.89, 10.5, 5' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain)
2021 Jan. 01.07, 11.0, 6.5' (T. Lehmann, Mayhill (remote), 0.28-m Newtonian reflector; 0.06-deg tail in p.a. 233)
2020 Dec. 31.83, 12.3, 1.5' (M. Smith, Heathwood Road, Cardiff, 0.203-m Schmidt-Cassegrain)
2020 Dec. 30.79, 12.8, 0.81' (M. Czepita, Dobra Szczecinska, Poland, 0.152-m Newtonian reflector)

C/2020 N1 (PANSTARRS)
Total-magnitude and coma-diameter estimates:
2021 Jan. 16.87, 15.2, 1.9' (T. Lehmann, Nerpio (remote), 0.2-m Newtonian reflector; 0.9' tail in p.a. 56)
2021 Jan. 12.86, 18.2, 0.4' (P. Carson, Fregenal de la Sierra Spain, 0.315-m Cassegrain reflector)
2021 Jan. 11.75, 15.6, 0.3' (S. Szabo, Agfalva, 0.6-m Newtonian reflector)
2021 Jan. 08.75, 15.3, 0.5' (G. Pappa, Nicolosi, Sicily , 0.3-m reflector)
2021 Jan. 02.83, 16.7, 0.6' (P. Carson, Fregenal de la Sierra Spain, 0.315-m Cassegrain reflector)
2021 Jan. 01.92, 16.8, 0.4' (K. Hills, Comphot version 1.2.6, 0.5-m Newtonian reflector)

C/2020 R4 (ATLAS)
Total-magnitude and coma-diameter estimates:
2021 Jan. 07.77, 9.5, 4' (J. Gonzalez Suarez, 0.203-m Schmidt-Cassegrain)

C/2020 S3 (Erasmus)
Total-magnitude and coma-diameter estimates:
2021 Jan. 02.42, 6.6, 7' (M. Paradowski, SOHO, LASCO C3, 0.008-m reflector)
2021 Jan. 02.27, 6.6, 7' (M. Paradowski, SOHO, LASCO C3, 0.008-m reflector)
2021 Jan. 02.13, 6.6, 7' (M. Paradowski, SOHO, LASCO C3, 0.008-m reflector)
2021 Jan. 02.06, 6.6, 7' (M. Paradowski, SOHO, LASCO C3, 0.008-m reflector)
2021 Jan. 02.00, 6.6, 7' (M. Paradowski, SOHO, LASCO C3, 0.008-m reflector)
2020 Dec. 31.44, 6.1, 7' (M. Paradowski, SOHO, LASCO C3, 0.008-m reflector)
2020 Dec. 30.10, 6.0, 14.9' (M. Paradowski, SOHO, LASCO C3, 0.008-m reflector)
2020 Dec. 30.04, 5.8, 14.9' (M. Paradowski, SOHO, LASCO C3, 0.008-m reflector)
2020 Dec. 30.00, 5.9, 14.9' (M. Paradowski, SOHO, LASCO C3, 0.008-m reflector)
2020 Dec. 29.75, 5.7, 14.9' (M. Paradowski, SOHO, LASCO C3, 0.008-m reflector)
2020 Dec. 29.50, 5.7, 14.9' (M. Paradowski, SOHO, LASCO C3, 0.008-m reflector)
2020 Dec. 28.54, 5.3, 14.9' (M. Paradowski, SOHO, LASCO C3, 0.008-m reflector)
2020 Dec. 28.25, 5.4, 14.9' (M. Paradowski, SOHO, LASCO C3, 0.008-m reflector)
2020 Dec. 28.13, 5.5, 14.9' (M. Paradowski, SOHO, LASCO C3, 0.008-m reflector)

C/2020 T2 (Palomar)
Total-magnitude and coma-diameter estimates:
2021 Jan. 23.26, 15.4, 0.6' (K. Hills, Comphot version 1.2.6, 0.5-m Newtonian reflector)
2021 Jan. 19.08, 15.8, 0.5' (G. Pappa, Spain(remote control) , 0.2-m Cassegrain reflector)
2021 Jan. 18.07, 15.9, 0.6' (G. Pappa, Spain(remote control) , 0.2-m Cassegrain reflector)
2021 Jan. 17.22, 15.9, 0.6' (P. Carson, Fregenal de la Sierra Spain, 0.315-m Cassegrain reflector)
2021 Jan. 15.52, 14.7, 3.7' (T. Lehmann, Mayhill (remote), 0.28-m Newtonian reflector; 1.4' tail in p.a. 286)
2021 Jan. 14.25, 15.0, 0.6' (K. Hills, Comphot version 1.2.6, 0.5-m Newtonian reflector)
2021 Jan. 10.19, 15.2, 0.6' (K. Hills, Comphot version 1.2.6, 0.5-m Newtonian reflector)
2021 Jan. 09.42, 15.6, 1.4' (T. Lehmann, Mayhill (remote), 0.28-m Newtonian reflector)
2021 Jan. 08.45, 15.3, 1.3' (T. Lehmann, Mayhill (remote), 0.28-m Newtonian reflector)

C/2020 U5 (PANSTARRS)
Total-magnitude and coma-diameter estimates:
2021 Jan. 14.20, 19.1, 0.4' (K. Hills, Comphot version 1.2.6, 0.5-m Newtonian reflector)

C/2020 V2 (ZTF)
Total-magnitude and coma-diameter estimates:
2021 Jan. 18.14, 17.7, 0.2' (G. Pappa, Namibia(remote control) , 0.5-m Cassegrain reflector)
2021 Jan. 17.49, 18.4, 0.5' (T. Lehmann, Mayhill (remote), 0.28-m Newtonian reflector)
2021 Jan. 17.23, 17.3, 0.4' (K. Hills, Comphot version 1.2.6, 0.5-m Newtonian reflector)
2021 Jan. 14.22, 17.2, 0.4' (K. Hills, Comphot version 1.2.6, 0.5-m Newtonian reflector)

C/2021 A1 (Leonard)
Total-magnitude and coma-diameter estimates:
2021 Jan. 24.49, 18.6, 0.11' (G. van Buitenen, Mayhill, New Mexico (H06), 0.51-m Ritchey-Chretien)
2021 Jan. 21.29, 18.6, 0.33' (J. Zhao, Burke-Gaffney Observatory, 0.61-m Ritchey-Chretien)
2021 Jan. 19.17, 19.0, 0.3' (M. Masek, 0.25-m Schmidt-Cassegrain)
2021 Jan. 19.17, 18.7, 0.3' (M. Masek, 0.25-m Schmidt-Cassegrain)
2021 Jan. 17.47, 19.1, 0.3' (C. Hergenrother, 0.507-m Ritchey-Chretien)
2021 Jan. 16.25, 18.6, -- (N. Paul, Canary Islands - Teide, 0.43-m Schmidt-Cassegrain)
2021 Jan. 12.02, 18.8, -- (A. Novichonok, ISON-Kitab observatory, 0.36-m Ritchey-Chretien)
2021 Jan. 11.20, 19.0, 0.4' (P. Carson, Fregenal de la Sierra Spain, 0.315-m Cassegrain reflector)

C/2021 A2 (NEOWISE)
Total-magnitude and coma-diameter estimates:
2021 Jan. 25.69, 11.0, 7' (C. Wyatt, 0.4-m Newtonian reflector)
2021 Jan. 23.66, 11.0, 3.3' (C. Wyatt, 0.4-m Newtonian reflector)
2021 Jan. 23.21, 10.8, 3' (M. Goiato, 0.22-m Newtonian reflector)
2021 Jan. 19.52, 11.0, 3' (M. Mattiazzo, Swan Hill, Victoria, 0.2-m Newtonian reflector)
2021 Jan. 19.30, 11.9, 3' (M. Masek, 0.3-m Cassegrain reflector)
2021 Jan. 19.30, 12.4, 2.1' (M. Masek, 0.3-m Cassegrain reflector)
2021 Jan. 18.03, 11.1, 2' (G. Pappa, Namibia(remote control) , 0.5-m Cassegrain reflector)
2021 Jan. 14.34, 12.4, 1.25' (N. Paul, La Dehesa , Chile , MPC code - W88, 0.35-m Schmidt-Cassegrain; 25.2" tail in p.a. 55)
2021 Jan. 13.50, 11.4, 1.5' (C. Wyatt, 0.25-m Newtonian reflector)
2021 Jan. 11.49, 13.0, 1.2' (C. Wyatt, 0.25-m Newtonian reflector)
2021 Jan. 08.58, 11.9, 2' (M. Mattiazzo, Swan Hill, Victoria, 0.2-m Newtonian reflector)
2021 Jan. 07.58, 12.2, 2' (M. Mattiazzo, Swan Hill, Victoria, 0.2-m Newtonian reflector)
2021 Jan. 06.50, 12.8, 1' (M. Mattiazzo, Swan Hill, Victoria, 0.2-m Newtonian reflector)

C/2021 A7 (NEOWISE)
Total-magnitude and coma-diameter estimates:
2021 Jan. 17.92, 16.1, 0.5' (G. Pappa, Namibia(remote control) , 0.5-m Cassegrain reflector)

P/2016 J3 (STEREO)
Total-magnitude and coma-diameter estimates:
2021 Jan. 16.78, 9.7, 5' (J. Gonzalez Suarez, Collada Cobertoria, 1179 m, Asturias, Spain., 0.203-m Schmidt-Cassegrain)
2021 Jan. 16.72, 11.0, 2' (G. Pappa, Catania, Sicily , 0.3-m reflector)
2021 Jan. 11.79, 13.1, 1.5' (P. Carson, Fregenal de la Sierra Spain, 0.315-m Cassegrain reflector)
2021 Jan. 11.71, 14.3, 0.3' (S. Szabo, Agfalva, 0.6-m Newtonian reflector)
2021 Jan. 08.72, 14.7, 0.8' (G. van Buitenen, Dordrecht, NL (G06), 0.203-m Ritchey-Chretien)

P/2019 V2 (Groeller)
Total-magnitude and coma-diameter estimates:
2021 Jan. 18.14, 19.8, -- (G. Pappa, Namibia(remote control) , 0.5-m Cassegrain reflector)

P/2020 T3 (PANSTARRS)
Total-magnitude and coma-diameter estimates:
2021 Jan. 15.90, 17.8, 0.4' (P. Carson, Fregenal de la Sierra Spain, 0.315-m Cassegrain reflector)
2021 Jan. 03.83, 17.6, 0.4' (P. Carson, Fregenal de la Sierra Spain, 0.315-m Cassegrain reflector; 3.0' tail)