Recent Comet Brightness Estimates

24P/Schaumasse
Total-magnitude and coma-diameter estimates:
2018 Jan. 17.69, 12.7, 1.4' (C. Wyatt, 0.25-m Newtonian reflector)
2018 Jan. 14.15, 13.0, 2' (P. Guzik, 0.326-m Newtonian reflector)
2017 Dec. 31.52, 11.2, 10' (T. Lehmann, 0.106-m refractor; 0.07-deg tail in p.a. 300)
2017 Dec. 30.49, 12.1, 5.4' (R. Ramlow, 0.106-m refractor)
2017 Dec. 29.78, 11.6, 3.5' (K. Harikae, 0.15-m Newtonian reflector)
2017 Dec. 26.52, 12.1, 5.8' (R. Ramlow, 0.106-m refractor)
2017 Dec. 26.22, 11.0, 2.5' (C. Harder, Jeersdorf, Germany , 0.252-m Newtonian reflector)
2017 Dec. 26.21, 11.4, 7.8' (S. Fritsche, 0.1-m refractor; 0.01-deg tail in p.a. 302)
2017 Dec. 25.52, 11.3, 9' (T. Lehmann, 0.106-m refractor; 0.08-deg tail in p.a. 301)
2017 Dec. 23.69, 12.2, 1.8' (C. Wyatt, 0.25-m Newtonian reflector)
2017 Dec. 22.77, 12.2, 2.5' (K. Harikae, 0.15-m Newtonian reflector)
2017 Dec. 21.87, 12.3, 3.6' (K. Yoshimoto, 0.203-m Ritchey-Chretien; 4.0' tail in p.a. 300)

29P/Schwassmann-Wachmann
Total-magnitude and coma-diameter estimates:
2018 Jan. 05.82, 12.8, 1' (K. Hills, 0.5-m Newtonian reflector)
2018 Jan. 03.82, 12.9, 0.8' (K. Hills, 0.5-m Newtonian reflector)
2018 Jan. 02.82, 12.9, 1.2' (K. Hills, 0.5-m Newtonian reflector)
2017 Dec. 31.82, 12.6, 1.2' (K. Hills, 0.5-m Newtonian reflector)
2017 Dec. 29.81, 12.6, 1.1' (K. Hills, 0.5-m Newtonian reflector)
2017 Dec. 25.81, 12.6, 1.7' (K. Hills, 0.5-m Newtonian reflector)
2017 Dec. 20.81, 12.4, 1.4' (K. Hills, 0.5-m Newtonian reflector)

30P/Reinmuth
Total-magnitude and coma-diameter estimates:
2017 Dec. 21.88, 17.1, 0.4' (K. Yoshimoto, 0.203-m Ritchey-Chretien; 1.2' tail in p.a. 290)

47P/Ashbrook-Jackson
Total-magnitude and coma-diameter estimates:
2018 Jan. 04.91, 17.1, 0.3' (K. Hills, 0.5-m Newtonian reflector)
2017 Dec. 26.19, 14.2, 0.8' (W. Kutschera, 0.54-m Newtonian reflector)

62P/Tsuchinshan
Total-magnitude and coma-diameter estimates:
2018 Jan. 17.68, 12.5, 3.3' (C. Wyatt, 0.25-m Newtonian reflector)
2018 Jan. 15.17, 10.6, 11' (S. Fritsche, 0.1-m refractor; 0.02-deg tail in p.a. 289)
2018 Jan. 14.13, 11.5, 3' (P. Guzik, 0.326-m Newtonian reflector)
2018 Jan. 13.67, 11.8, 2' (C. Wyatt, 0.25-m Newtonian reflector)
2018 Jan. 13.43, 11.5, 6.6' (R. Ramlow, 0.106-m refractor; 4.2' tail in p.a. 296)
2017 Dec. 30.51, 10.8, 14' (T. Lehmann, 0.106-m refractor; 0.15-deg tail in p.a. 299)
2017 Dec. 29.78, 11.4, 4.1' (K. Harikae, 0.15-m Newtonian reflector)
2017 Dec. 28.40, 10.9, 6.5' (R. Ramlow, 0.106-m refractor)
2017 Dec. 26.21, 11.0, 3.8' (W. Kutschera, 0.25-m Newtonian reflector)
2017 Dec. 26.21, 10.8, 3' (C. Harder, Jeersdorf, Germany , 0.252-m Newtonian reflector)
2017 Dec. 26.15, 10.7, 9.7' (S. Fritsche, 0.1-m refractor; 0.02-deg tail in p.a. 299)
2017 Dec. 25.42, 10.9, 7' (R. Ramlow, 0.106-m refractor)
2017 Dec. 25.19, 12.3, 3.8' (K. Hills, 0.5-m Newtonian reflector)
2017 Dec. 23.67, 11.7, 2.9' (C. Wyatt, 0.25-m Newtonian reflector)
2017 Dec. 22.77, 11.7, 5.8' (K. Harikae, 0.15-m Newtonian reflector)

71P/Clark
Total-magnitude and coma-diameter estimates:
2018 Jan. 04.45, 15.0, 2.5' (T. Lehmann, 0.51-m Newtonian reflector)
2018 Jan. 02.83, 14.0, 0.6' (K. Hills, 0.5-m Newtonian reflector)
2017 Dec. 27.46, 15.7, 1.4' (T. Lehmann, 0.51-m Newtonian reflector)

74P/Smirnova-Chernykh
Total-magnitude and coma-diameter estimates:
2017 Dec. 26.15, 16.5, 0.4' (K. Hills, 0.5-m Newtonian reflector)
2017 Dec. 20.31, 17.0, 0.3' (M. Masek, 0.3-m Schmidt-Cassegrain; 0.7' tail in p.a. 294)

90P/Gehrels
Total-magnitude and coma-diameter estimates:
2017 Dec. 25.06, 16.0, 0.4' (K. Hills, 0.5-m Newtonian reflector)

95P/Chiron
Total-magnitude and coma-diameter estimates:
2018 Jan. 05.85, 17.8, 0.2' (K. Hills, 0.5-m Newtonian reflector)

139P/Vaisala-Oterma
Total-magnitude and coma-diameter estimates:
2018 Jan. 04.86, 18.4, 0.2' (K. Hills, 0.5-m Newtonian reflector)

143P/Kowal-Mrkos
Total-magnitude and coma-diameter estimates:
2017 Dec. 26.22, 18.0, 0.2' (K. Hills, 0.5-m Newtonian reflector)

145P/Shoemaker-Levy
Total-magnitude and coma-diameter estimates:
2017 Dec. 28.13, 13.9, 0.8' (K. Hills, 0.5-m Newtonian reflector)
2017 Dec. 21.18, 13.2, 0.7' (K. Hills, 0.5-m Newtonian reflector)

159P/LONEOS
Total-magnitude and coma-diameter estimates:
2018 Jan. 03.86, 18.8, 0.2' (K. Hills, 0.5-m Newtonian reflector)

174P/Echeclus
Total-magnitude and coma-diameter estimates:
2018 Jan. 10.71, 14.4, 3.7' (S. Fritsche, 0.1-m refractor)
2018 Jan. 07.79, [12.9, -- (J. Warell, Lindby Observatory (K60), Skurup, Sweden , 0.25-m Newtonian reflector)
2018 Jan. 03.89, 14.0, 2' (K. Hills, 0.5-m Newtonian reflector)
2017 Dec. 25.72, 13.3, 0.6' (S. Szabo, Sopron, 0.6-m Newtonian reflector)
2017 Dec. 24.86, 13.3, 1.7' (K. Hills, 0.5-m Newtonian reflector)
2017 Dec. 24.71, 14.4, 0.3' (W. Hasubick, 0.44-m Newtonian reflector)
2017 Dec. 23.58, 13.8, 1' (C. Wyatt, 0.25-m Newtonian reflector)
2017 Dec. 23.15, 13.6, 1' (M. Masek, 0.3-m Schmidt-Cassegrain)
2017 Dec. 23.15, 14.1, 0.9' (M. Masek, 0.3-m Schmidt-Cassegrain)
2017 Dec. 22.54, 13.4, 1' (M. Tsumura, 0.5-m Newtonian reflector)
2017 Dec. 21.01, 13.4, 0.9' (G. van Buitenen, Nerpio, Spain (I89), 0.431-m Schmidt-Cassegrain)
2017 Dec. 20.08, 14.2, 0.8' (M. Masek, 0.3-m Schmidt-Cassegrain)
2017 Dec. 20.08, 13.7, 0.9' (M. Masek, 0.3-m Schmidt-Cassegrain)

183P/Korlevic-Juric
Total-magnitude and coma-diameter estimates:
2017 Dec. 25.21, 19.4, 0.2' (K. Hills, 0.5-m Newtonian reflector)

185P/Petriew
Total-magnitude and coma-diameter estimates:
2018 Jan. 14.08, 12.8, 3.2' (R. Ramlow, 0.106-m refractor)
2018 Jan. 12.07, 13.1, 3.1' (R. Ramlow, 0.106-m refractor)
2017 Dec. 25.69, 14.0, 0.3' (S. Szabo, Sopron, 0.6-m Newtonian reflector)

188P/LINEAR-Mueller
Total-magnitude and coma-diameter estimates:
2017 Dec. 25.07, 16.9, 0.3' (K. Hills, 0.5-m Newtonian reflector)

217P/LINEAR
Total-magnitude and coma-diameter estimates:
2018 Jan. 08.15, 15.9, 0.6' (M. Masek, 0.3-m Schmidt-Cassegrain)
2017 Dec. 22.06, 14.1, 0.7' (K. Hills, 0.5-m Newtonian reflector)

240P/NEAT
Total-magnitude and coma-diameter estimates:
2018 Jan. 08.07, 14.7, 1.1' (M. Masek, 0.3-m Schmidt-Cassegrain; 0.7' tail in p.a. 73)
2018 Jan. 01.84, 13.4, 0.8' (K. Hills, 0.5-m Newtonian reflector)

355P/LINEAR-NEAT
Total-magnitude and coma-diameter estimates:
2018 Jan. 05.88, 16.0, 0.5' (K. Hills, 0.5-m Newtonian reflector)

C/2010 U3 (Boattini)
Total-magnitude and coma-diameter estimates:
2017 Dec. 21.13, 14.0, 0.6' (K. Hills, 0.5-m Newtonian reflector)

C/2011 KP36 (Spacewatch)
Total-magnitude and coma-diameter estimates:
2017 Dec. 20.98, 14.8, 0.6' (K. Hills, 0.5-m Newtonian reflector)

C/2015 ER61 (PANSTARRS)
Total-magnitude and coma-diameter estimates:
2018 Jan. 02.88, 14.3, 0.6' (K. Hills, 0.5-m Newtonian reflector)
2017 Dec. 20.15, 15.5, 3' (T. Lehmann, 0.106-m refractor; 0.4-deg tail in p.a. 261)

C/2015 O1 (PANSTARRS)
Total-magnitude and coma-diameter estimates:
2018 Jan. 14.08, 13.4, 0.8' (P. Guzik, 0.326-m Newtonian reflector)

C/2015 V1 (PANSTARRS)
Total-magnitude and coma-diameter estimates:
2018 Jan. 03.87, 15.7, 0.7' (K. Hills, 0.5-m Newtonian reflector)

C/2015 V2 (Johnson)
Total-magnitude and coma-diameter estimates:
2018 Jan. 17.44, 12.9, 1.4' (C. Wyatt, 0.25-m Newtonian reflector)
2018 Jan. 16.45, 13.5, 1.6' (C. Wyatt, 0.25-m Newtonian reflector)
2018 Jan. 14.45, 13.0, 1.4' (C. Wyatt, 0.25-m Newtonian reflector)
2018 Jan. 05.44, 13.5, 0.9' (C. Wyatt, 0.25-m Newtonian reflector)
2018 Jan. 03.44, 13.2, 3.8' (T. Lehmann, 0.51-m Newtonian reflector; 0.2-deg tail in p.a. 275)
2017 Dec. 23.43, 12.8, 4' (T. Lehmann, 0.106-m refractor; 0.2-deg tail in p.a. 283)

C/2016 A1 (PANSTARRS)
Total-magnitude and coma-diameter estimates:
2018 Jan. 05.94, 14.0, 0.5' (K. Hills, 0.5-m Newtonian reflector)
2017 Dec. 22.09, 15.4, 1' (K. Hills, 0.5-m Newtonian reflector)

C/2016 M1 (PANSTARRS)
Total-magnitude and coma-diameter estimates:
2018 Jan. 18.54, 13.4, 0.9' (R. Ramlow, 0.106-m refractor)

C/2016 N6 (PANSTARRS)
Total-magnitude and coma-diameter estimates:
2018 Jan. 14.75, 13.2, 0.7' (C. Harder, Reinsehlen, Germany, 0.4-m Newtonian reflector)
2018 Jan. 14.06, 13.0, 0.6' (P. Guzik, 0.326-m Newtonian reflector)
2018 Jan. 13.45, 13.7, 1.1' (R. Ramlow, 0.106-m refractor; 0.8' tail in p.a. 117)
2018 Jan. 08.93, 13.2, 0.5' (P. Guzik, 0.326-m Newtonian reflector)
2018 Jan. 07.73, 13.1, 0.5' (C. Harder, Reinsehlen, Germany, 0.4-m Newtonian reflector)
2017 Dec. 31.54, 14.3, 0.44' (K. Yoshimoto, 0.51-m Newtonian reflector)
2017 Dec. 30.52, 14.1, 1.7' (T. Lehmann, 0.106-m refractor; 0.02-deg tail in p.a. 98)
2017 Dec. 26.12, 14.0, 3.5' (S. Fritsche, 0.1-m refractor; 0.01-deg tail in p.a. 14)
2017 Dec. 25.53, 14.3, 1.5' (T. Lehmann, 0.106-m refractor; 0.06-deg tail in p.a. 93)

C/2016 Q4 (Kowalski)
Total-magnitude and coma-diameter estimates:
2018 Jan. 05.87, 20.2, 0.2' (K. Hills, 0.5-m Newtonian reflector)

C/2016 R2 (PANSTARRS)
Total-magnitude and coma-diameter estimates:
2018 Jan. 18.95, 10.6, 3.4' (M. Collins, Everton, 0.254-m Schmidt-Cassegrain)
2018 Jan. 17.79, 11.0, 1.6' (M. Meyer, 0.254-m Newtonian reflector)
2018 Jan. 17.45, 11.4, 4' (C. Wyatt, 0.25-m Newtonian reflector)
2018 Jan. 17.02, 11.0, 6' (D. Bamberger, 0.071-m refractor; 2.5' tail in p.a. 108)
2018 Jan. 16.45, 11.3, 5.5' (C. Wyatt, 0.25-m Newtonian reflector)
2018 Jan. 15.89, 11.2, 8' (D. Bamberger, 0.254-m Ritchey-Chretien; 2.5' tail in p.a. 101)
2018 Jan. 15.81, 10.6, 2' (M. Kwinta, Krakow, 0.185-m Newtonian reflector)
2018 Jan. 15.78, 11.1, 3' (M. Collins, Everton, 0.254-m Schmidt-Cassegrain)
2018 Jan. 15.46, 11.3, 3.9' (C. Wyatt, 0.25-m Newtonian reflector)
2018 Jan. 15.12, 10.2, 7.3' (R. Ramlow, 0.106-m refractor; 76.0' tail in p.a. 91)
2018 Jan. 14.80, 11.2, 1.6' (C. Harder, Reinsehlen, Germany, 0.4-m Newtonian reflector)
2018 Jan. 14.79, 10.6, 2' (M. Kwinta, Krakow, 0.185-m Newtonian reflector)
2018 Jan. 14.77, 10.9, 1.5' (M. Meyer, 0.254-m Newtonian reflector)
2018 Jan. 14.45, 11.2, 4.8' (C. Wyatt, 0.25-m Newtonian reflector; 6.3' tail in p.a. 90)
2018 Jan. 13.80, 10.5, 2' (M. Kwinta, Krakow, 0.185-m Newtonian reflector)
2018 Jan. 13.09, [10.9, -- (S. Aguirre, Son, Mex., 0.2-m Schmidt-Cassegrain)
2018 Jan. 12.43, 11.0, 4.8' (C. Wyatt, 0.25-m Newtonian reflector)
2018 Jan. 12.08, 10.3, 6.7' (R. Ramlow, 0.106-m refractor; 18.0' tail in p.a. 87)
2018 Jan. 11.09, [10.8, -- (S. Aguirre, Son, Mex., 0.2-m Schmidt-Cassegrain)
2018 Jan. 10.82, 10.9, 11' (T. Lehmann, 0.075-m reflector; 0.9-deg tail in p.a. 100)
2018 Jan. 09.82, 10.6, 5' (T. Karhula, Virsbo, Sweden, 25x100 binoculars)
2018 Jan. 08.88, 11.2, 3' (P. Guzik, 0.326-m Newtonian reflector; 0.3-deg tail in p.a. 110)
2018 Jan. 08.76, 10.8, 3.4' (J. Bohusz, Myślin Poland, 0.38-m Newtonian reflector)
2018 Jan. 08.76, 11.5, 1.5' (C. Harder, Jeersdorf, Germany , 0.303-m Newtonian reflector)
2018 Jan. 08.73, 11.1, 1.6' (U. Pilz, 0.32-m Newtonian reflector)
2018 Jan. 08.45, 11.2, 3.5' (C. Wyatt, 0.25-m Newtonian reflector)
2018 Jan. 08.17, 10.3, 6' (R. Ramlow, 0.106-m refractor; 40.0' tail in p.a. 110)
2018 Jan. 07.90, 10.2, 16' (D. Bamberger, 0.071-m refractor; 1.8' tail in p.a. 130)
2018 Jan. 07.83, 10.4, 3' (J. Warell, Lindby Observatory (K60), Skurup, Sweden , 0.25-m Newtonian reflector)
2018 Jan. 07.76, 11.8, 1.5' (C. Harder, Reinsehlen, Germany, 0.4-m Newtonian reflector)
2018 Jan. 07.45, 10.9, 9' (T. Lehmann, 0.51-m Newtonian reflector; 0.15-deg tail in p.a. 167)
2018 Jan. 07.12, 12.1, 4.8' (M. Masek, 0.3-m Schmidt-Cassegrain; 7.4' tail in p.a. 102)
2018 Jan. 06.87, 11.6, 2.4' (G. Scheerle, 0.235-m Schmidt-Cassegrain)
2018 Jan. 06.79, 11.0, 4' (T. Karhula, Virsbo, Sweden, 0.305-m Newtonian reflector)
2018 Jan. 06.48, 11.1, 2.6' (S. Yoshida, 0.4-m Newtonian reflector)
2018 Jan. 06.14, 10.3, 5.5' (R. Ramlow, 0.106-m refractor; 18.0' tail in p.a. 90)
2018 Jan. 06.08, [10.5, -- (S. Aguirre, Son, Mex., 0.2-m Schmidt-Cassegrain)
2018 Jan. 05.45, 10.7, 7' (C. Wyatt, 0.25-m Newtonian reflector)
2018 Jan. 03.44, 11.0, 11' (T. Lehmann, 0.106-m refractor; 0.1-deg tail in p.a. 168)
2017 Dec. 28.85, 11.2, 2.6' (G. Scheerle, 0.235-m Schmidt-Cassegrain)
2017 Dec. 27.86, 10.8, 4' (M. Paradowski, Lublin, Poland, 0.034-m reflector)
2017 Dec. 27.86, 11.5, 4' (M. Paradowski, Lublin, Poland, 0.034-m reflector)
2017 Dec. 27.69, 10.7, 3' (K. Yoshimoto, 26x100 binoculars)
2017 Dec. 26.92, 10.8, 2.5' (W. Kutschera, 0.25-m Newtonian reflector; 0.07-deg tail)
2017 Dec. 26.19, 10.5, 4.6' (R. Ramlow, 0.15-m refractor)
2017 Dec. 26.02, 10.2, 14' (S. Fritsche, 0.1-m refractor; 0.08-deg tail in p.a. 104)
2017 Dec. 25.80, 12.0, 1.25' (S. Szabo, Sopron, 0.6-m Newtonian reflector)
2017 Dec. 25.59, 10.7, 11' (T. Lehmann, 0.106-m refractor; 0.27-deg tail in p.a. 194)
2017 Dec. 25.15, 11.2, 4.3' (M. Masek, 0.3-m Schmidt-Cassegrain)
2017 Dec. 24.75, 12.4, 1.5' (W. Hasubick, 0.44-m Newtonian reflector)
2017 Dec. 23.91, 11.7, 1.5' (C. Labordena, Culla, 0.2-m Schmidt-Cassegrain)
2017 Dec. 23.59, 11.2, 3.5' (C. Wyatt, 0.25-m Newtonian reflector)
2017 Dec. 23.19, 11.6, 3.3' (M. Masek, 0.3-m Schmidt-Cassegrain; 5.5' tail in p.a. 82)
2017 Dec. 22.55, 11.4, 3.7' (M. Tsumura, 0.5-m Newtonian reflector)
2017 Dec. 22.54, 11.1, 7.3' (C. Hergenrother, 0.51-m Ritchey-Chretien)
2017 Dec. 22.12, 11.1, 7.1' (K. Hills, 0.5-m Newtonian reflector)
2017 Dec. 21.02, 11.3, 1.8' (G. van Buitenen, Nerpio, Spain (I89), 0.431-m Schmidt-Cassegrain)
2017 Dec. 20.12, 11.5, 3.8' (M. Masek, 0.3-m Schmidt-Cassegrain; 6.7' tail in p.a. 82)

C/2016 T3 (PANSTARRS)
Total-magnitude and coma-diameter estimates:
2017 Dec. 26.13, 17.0, 0.4' (K. Hills, 0.5-m Newtonian reflector)

C/2017 K6 (Jacques)
Total-magnitude and coma-diameter estimates:
2018 Jan. 17.46, 13.8, 1' (C. Wyatt, 0.25-m Newtonian reflector)
2018 Jan. 16.46, 13.8, 1' (C. Wyatt, 0.25-m Newtonian reflector)
2018 Jan. 15.47, 13.9, 1.3' (C. Wyatt, 0.25-m Newtonian reflector)
2018 Jan. 14.47, 13.8, 1.6' (C. Wyatt, 0.25-m Newtonian reflector)
2018 Jan. 12.44, 13.7, 0.8' (C. Wyatt, 0.25-m Newtonian reflector)
2018 Jan. 08.11, 14.3, 0.9' (M. Masek, 0.3-m Schmidt-Cassegrain; 1.1' tail in p.a. 74)
2018 Jan. 06.48, 12.7, 8' (T. Lehmann, 0.51-m Newtonian reflector)
2018 Jan. 05.46, 14.0, 0.8' (C. Wyatt, 0.25-m Newtonian reflector)
2017 Dec. 20.16, 14.0, 1.2' (M. Masek, 0.3-m Schmidt-Cassegrain; 1.8' tail in p.a. 67)

C/2017 O1 (ASASSN1)
Total-magnitude and coma-diameter estimates:
2018 Jan. 10.77, 11.9, 10' (T. Lehmann, 0.075-m reflector)
2018 Jan. 07.85, [13.2, -- (J. Warell, Lindby Observatory (K60), Skurup, Sweden , 0.25-m Newtonian reflector)
2018 Jan. 07.15, 12.1, 8.5' (T. Lehmann, 0.106-m refractor)
2018 Jan. 06.74, 12.0, 4' (G. Scheerle, 0.235-m Schmidt-Cassegrain)
2018 Jan. 04.83, 13.7, 1.6' (K. Hills, 0.5-m Newtonian reflector)
2017 Dec. 28.42, 11.7, 9' (T. Lehmann, 0.106-m refractor)
2017 Dec. 28.39, 12.5, 3.3' (R. Ramlow, 0.106-m refractor)
2017 Dec. 26.24, 11.4, 3' (C. Harder, Jeersdorf, Germany , 0.252-m Newtonian reflector)
2017 Dec. 26.09, 11.6, 12' (S. Fritsche, 0.1-m refractor)
2017 Dec. 23.89, 12.2, 2.5' (C. Labordena, Culla, 0.2-m Schmidt-Cassegrain)
2017 Dec. 22.04, 12.6, 1.5' (K. Hills, 0.5-m Newtonian reflector)

C/2017 S6 (Catalina)
Total-magnitude and coma-diameter estimates:
2017 Dec. 25.78, 15.3, 0.4' (S. Szabo, Sopron, 0.6-m Newtonian reflector)

C/2017 T1 (Heinze)
Total-magnitude and coma-diameter estimates:
2018 Jan. 18.94, 10.1, 3.1' (M. Collins, Everton, 0.254-m Schmidt-Cassegrain)
2018 Jan. 18.09, 9.8, 9.1' (R. Ramlow, 0.106-m refractor; 9.8' tail in p.a. 57)
2018 Jan. 17.80, 10.1, 2.5' (M. Meyer, 0.254-m Newtonian reflector)
2018 Jan. 17.09, 9.6, 9.9' (R. Ramlow, 0.106-m refractor; 10.1' tail in p.a. 52)
2018 Jan. 16.78, 10.4, 4' (M. Meyer, 0.254-m Newtonian reflector)
2018 Jan. 15.83, 9.7, 7.9' (M. Paradowski, Lublin, Poland, 0.034-m reflector)
2018 Jan. 15.83, 9.9, 4' (M. Paradowski, Lublin, Poland, 0.034-m reflector)
2018 Jan. 15.79, 10.1, 2' (M. Kwinta, Krakow, 0.185-m Newtonian reflector)
2018 Jan. 14.83, 10.3, 4.8' (C. Harder, Reinsehlen, Germany, 0.4-m Newtonian reflector)
2018 Jan. 14.78, 9.8, 2' (M. Kwinta, Krakow, 0.185-m Newtonian reflector)
2018 Jan. 14.76, 10.3, 2.5' (M. Meyer, 0.254-m Newtonian reflector)
2018 Jan. 13.78, 9.9, 2' (M. Kwinta, Krakow, 0.185-m Newtonian reflector)
2018 Jan. 13.16, 9.6, 10.4' (R. Ramlow, 0.106-m refractor; 12.4' tail in p.a. 66)
2018 Jan. 13.09, [10.9, -- (S. Aguirre, Son, Mex., 0.2-m Schmidt-Cassegrain)
2018 Jan. 12.07, 9.7, 10' (R. Ramlow, 0.106-m refractor; 7.3' tail in p.a. 59)
2018 Jan. 11.08, 10.9, -- (S. Aguirre, Son, Mex., 0.2-m Schmidt-Cassegrain)
2018 Jan. 10.74, 9.1, 21' (T. Lehmann, 0.075-m reflector; 0.4-deg tail in p.a. 70)
2018 Jan. 08.91, 9.5, 8' (P. Guzik, 10x50 binoculars)
2018 Jan. 08.90, 9.8, 6' (P. Guzik, 0.326-m Newtonian reflector; 0.2-deg tail in p.a. 80)
2018 Jan. 08.85, 10.5, 2.5' (J. Bohusz, Myślin Poland, 0.25-m Newtonian reflector)
2018 Jan. 08.80, 11.0, 3.5' (C. Harder, Jeersdorf, Germany , 0.303-m Newtonian reflector)
2018 Jan. 08.72, 10.7, 6' (U. Pilz, 0.32-m Newtonian reflector)
2018 Jan. 08.07, 9.1, 16.6' (R. Ramlow, 0.106-m refractor; 28.5' tail in p.a. 100)
2018 Jan. 07.83, 9.2, 19.4' (D. Bamberger, 0.071-m refractor; 11.8' tail in p.a. 90)
2018 Jan. 07.82, 9.5, 6' (J. Warell, Lindby Observatory (K60), Skurup, Sweden , 0.25-m Newtonian reflector)
2018 Jan. 07.81, 9.5, 10' (A. Scholten, Eerbeek, 0.2-m Newtonian reflector)
2018 Jan. 07.78, 10.8, 3' (M. Collins, Everton, 0.254-m Schmidt-Cassegrain)
2018 Jan. 07.78, 10.5, 3' (G. van Buitenen, Dordrecht, Netherlands, 0.305-m Newtonian reflector)
2018 Jan. 07.75, 11.6, 2' (C. Harder, Reinsehlen, Germany, 0.4-m Newtonian reflector)
2018 Jan. 07.17, 8.4, 30' (T. Lehmann, 0.106-m refractor; 0.8-deg tail in p.a. 110)
2018 Jan. 07.12, 10.4, 2.5' (M. Collins, Everton, 0.254-m Schmidt-Cassegrain)
2018 Jan. 07.01, 10.3, 4' (D. Bamberger, 0.254-m Ritchey-Chretien; 4.7' tail in p.a. 115)
2018 Jan. 06.73, 9.9, 6' (T. Karhula, Virsbo, Sweden, 0.305-m Newtonian reflector)
2018 Jan. 06.51, 10.3, 4' (S. Yoshida, 0.4-m Newtonian reflector)
2018 Jan. 06.20, 9.4, 7' (C. Hergenrother, 30x125 binoculars)
2018 Jan. 06.09, 10.5, -- (S. Aguirre, Son, Mex., 0.2-m Schmidt-Cassegrain)
2018 Jan. 06.07, 9.1, 18.8' (R. Ramlow, 0.106-m refractor; 31.0' tail in p.a. 130)
2018 Jan. 05.76, 10.5, 3' (J. Navarro Pina, Puerto de la Cadena ( Murcia , Spain ), 0.305-m Newtonian reflector)
2018 Jan. 04.75, 10.5, 2.9' (M. Collins, Everton, 0.254-m Schmidt-Cassegrain)
2018 Jan. 03.96, 9.8, 6' (D. Bamberger, 0.071-m refractor; 6.0' tail in p.a. 168)
2017 Dec. 31.53, 10.8, 4.3' (K. Yoshimoto, 0.106-m refractor; 25.0' tail in p.a. 200)
2017 Dec. 31.52, 9.4, 16' (R. Ramlow, 0.106-m refractor; 22.5' tail in p.a. 203)
2017 Dec. 30.51, 10.6, 5.9' (K. Yoshimoto, 0.106-m refractor; 14.0' tail in p.a. 205)
2017 Dec. 30.49, 9.5, 17' (R. Ramlow, 0.106-m refractor; 21.8' tail in p.a. 210)
2017 Dec. 30.31, 12.0, 1.8' (M. Masek, 0.3-m Schmidt-Cassegrain; 6.5' tail in p.a. 220)
2017 Dec. 30.31, 12.0, 1.5' (M. Masek, 0.3-m Schmidt-Cassegrain; 4.6' tail in p.a. 226)
2017 Dec. 30.31, 12.4, 1.2' (M. Masek, 0.3-m Schmidt-Cassegrain; 1.9' tail in p.a. 229)
2017 Dec. 29.59, 11.1, 1.3' (G. van Buitenen, Auberry, California (U69), 0.61-m Schmidt-Cassegrain)
2017 Dec. 29.51, 9.7, 5' (C. Hergenrother, 30x125 binoculars)
2017 Dec. 29.29, 12.3, 1.4' (M. Masek, 0.3-m Schmidt-Cassegrain; 2.1' tail in p.a. 234)
2017 Dec. 29.29, 12.1, 2.1' (M. Masek, 0.3-m Schmidt-Cassegrain; 9.5' tail in p.a. 228)
2017 Dec. 29.28, 12.1, 1.4' (M. Masek, 0.3-m Schmidt-Cassegrain; 6.7' tail in p.a. 223)
2017 Dec. 29.16, 11.4, 1.3' (G. van Buitenen, Dordrecht, Netherlands, 0.305-m Newtonian reflector)
2017 Dec. 28.44, 9.2, 23' (T. Lehmann, 0.106-m refractor; 0.4-deg tail in p.a. 221)
2017 Dec. 28.40, 9.9, 14.5' (R. Ramlow, 0.106-m refractor; 19.0' tail in p.a. 222)
2017 Dec. 28.14, 11.0, 2.4' (K. Hills, 0.5-m Newtonian reflector)
2017 Dec. 28.07, 11.7, 3.3' (D. Bamberger, 0.254-m Ritchey-Chretien; 7.3' tail in p.a. 230)
2017 Dec. 27.73, 10.3, 4' (K. Yoshimoto, 26x100 binoculars)
2017 Dec. 26.32, 12.4, 1.5' (M. Masek, 0.3-m Schmidt-Cassegrain; 4.6' tail in p.a. 238)
2017 Dec. 26.32, 12.3, 1.5' (M. Masek, 0.3-m Schmidt-Cassegrain; 7.2' tail in p.a. 242)
2017 Dec. 26.31, 12.8, 1.2' (M. Masek, 0.3-m Schmidt-Cassegrain; 2.8' tail in p.a. 253)
2017 Dec. 26.19, 11.0, 2.5' (C. Harder, Jeersdorf, Germany , 0.252-m Newtonian reflector)
2017 Dec. 26.17, 11.9, 1.2' (W. Kutschera, 0.25-m Newtonian reflector)
2017 Dec. 26.05, 10.2, 16' (S. Fritsche, 0.1-m refractor; 0.11-deg tail in p.a. 231)
2017 Dec. 26.04, 9.9, 15' (T. Lehmann, 0.25-m Newtonian reflector; 0.25-deg tail in p.a. 234)
2017 Dec. 25.90, 11.3, 1.8' (S. Szabo, Sopron, 0.6-m Newtonian reflector)
2017 Dec. 25.87, 11.9, 0.8' (W. Hasubick, 0.44-m Newtonian reflector)
2017 Dec. 25.43, 9.9, 17' (T. Lehmann, 0.106-m refractor; 0.26-deg tail in p.a. 231)
2017 Dec. 25.41, 10.5, 10.3' (R. Ramlow, 0.106-m refractor; 11.4' tail in p.a. 235)
2017 Dec. 24.96, 11.0, 2.3' (K. Hills, 0.5-m Newtonian reflector)
2017 Dec. 23.64, 11.8, 1.5' (C. Wyatt, 0.25-m Newtonian reflector)
2017 Dec. 23.27, 13.6, 0.9' (M. Masek, 0.3-m Schmidt-Cassegrain; 4.1' tail in p.a. 246)
2017 Dec. 23.27, 13.8, 0.8' (M. Masek, 0.3-m Schmidt-Cassegrain; 2.6' tail in p.a. 253)
2017 Dec. 21.98, 12.3, 0.4' (G. van Buitenen, Nerpio, Spain (I89), 0.431-m Schmidt-Cassegrain)
2017 Dec. 21.83, 11.7, 4.1' (K. Yoshimoto, 0.203-m Ritchey-Chretien; 6.0' tail in p.a. 245)
2017 Dec. 21.76, 12.3, 0.6' (K. Nagashima, 0.304-m Newtonian reflector)
2017 Dec. 21.68, 12.5, 2' (R. Aikawa, 0.203-m Schmidt-Cassegrain)
2017 Dec. 20.21, 11.5, 2.3' (K. Hills, 0.5-m Newtonian reflector)

C/2017 T3 (ATLAS)
Total-magnitude and coma-diameter estimates:
2018 Jan. 07.13, 16.6, 0.3' (R. Ramlow, 0.25-m Newtonian reflector)
2017 Dec. 24.85, 16.9, 0.3' (K. Hills, 0.5-m Newtonian reflector)

3200 Phaethon
Total-magnitude and coma-diameter estimates:
2017 Dec. 23.05, 14.6, 0.8' (T. Lehmann, 0.106-m refractor)