Below are the descriptive information (regarding comparison stars, which were formally published in the printed pages of the ICQ) that supplement tabulated data for the January 2010 issue of the ICQ.
Comet 14P/Wolf 2009 Sept. 24.71: Guide 8.0 software used for comp.-star mags; comp. star has B-V = +0.72 [TSU02]. Oct. 21.64: Guide 8.0 software used for comp.-star mags; comp. star has B-V = +0.64 [TSU02]. Nov. 14.60: Guide 8.0 software used for comp.-star mags; comp. star has B-V = +0.50 [TSU02]. Comet 22P/Kopff 2009 Sept. 24.51: GUIDE 8.0 software used for comp.-star mags; B-V of comp. star was +0.51 [TSU02]. Oct. 21.46: Guide 8.0 software used for comp.-star mags; comp. star has B-V = +0.57 [TSU02]. Nov. 6.44: Guide 8.0 software used for comp.-star mags; comp. star has B-V = +0.96 [TSU02]. Nov. 8.45: Guide 8.0 software used for comp.-star mags; comp. star has B-V = +0.62 [TSU02]. Nov. 9.41 and 15.43: comp.-star mags taken from SkyMap Pro v6.0 software [WYA]. Nov. 14.50: Guide 8.0 software used for comp.-star mags; comp. star has B-V = +0.67 [TSU02]. Nov. 21.43: Guide 8.0 software used for comp.-star mags; comp. star has B-V = +0.67 [YUS]. Nov. 23.40: Guide 8.0 software used for comp.-star mags; comp. star has B-V = +0.55 [YUS]. Comet 29P/Schwassmann-Wachmann 2009 Nov. 25.72: comp.-star mags taken from SkyMap Pro v6.0 software [WYA]. Comet 30P/Reinmuth 2009 Nov. 14.73: Guide 8.0 software used for comp.-star mags; comp. star has B-V = +0.46 [TSU02]. Comet 43P/Wolf-Harrington 2009 Dec. 4.41: Guide 8.0 software used for comp.-star mags; comp. star has B-V = +0.82 [YUS]. Comet 81P/Wild 2009 Nov. 9.48: ref. star has V = 10.52 (B-V = +0.69) [AGU01]. Nov. 15.69, 16.72, 21.73, 25.71, Dec. 16.70, 17.67, 20.67, and Dec. 23.69: comp.-star mags taken from SkyMap Pro v6.0 software [WYA]. Nov. 19.78: Guide 8.0 software used for comp.-star mags [YOS02]. Nov. 19.80: Guide 8.0 software used for comp.-star mags [NAG04]. Comet 88P/Howell 2009 Oct. 21.40: Guide 8.0 software used for comp.-star mags; comp. star has B-V = +0.57 [TSU02]. Oct. 31.39, Nov. 1.38, 3.39, 9.39, 10.40, 11.40, 12.44, 15.41, 16.39, 20.45, 21.42, Dec. 7.43, 13.42, 15.44, 17.44, and 20.43: comp.-star mags taken from SkyMap Pro v6.0 software [WYA]. Nov. 2.95: comp. stars have V = 8.37 (B-V = +0.30) and 9.08 (B-V = +0.43) [AMO01]. Nov. 14.40: Guide 8.0 software used for comp.-star mags [YOS02]. Dec. 1.38: Guide 8.0 software used for comp.-star mags; comp. star has B-V = +0.53 [YUS]. Dec. 6.96: comp. stars have V = 8.60 (B-V = +0.44) and 9.40 (B-V = +0.46) [AMO01]. Dec. 8.39: Guide 8.0 software used for comp.-star mags [NAG04]. 107P/Wilson-Harrington = (4015) 2009 Nov. 6.41: Guide 8.0 software used for comp.-star mags; comp. star has B-V = +0.42 [TSU02]. Nov. 8.39: Guide 8.0 software used for comp.-star mags; comp. star has B-V = +0.83 [TSU02]. Nov. 14.48: Guide 8.0 software used for comp.-star mags; comp. star has B-V = +0.50 [TSU02]. Dec. 1.42: Guide 8.0 software used for comp.-star mags; comp. star has B-V = +0.85 [YUS]. 118P/Shoemaker-Levy 2009 Sept. 24.80: Guide 8.0 software used for comp.-star mags; comp. star has B-V = +0.46 [TSU02]. Nov. 14.65: Guide 8.0 software used for comp.-star mags; comp. star has B-V = +0.41 [TSU02]. Comet 118P/Shoemaker-Levy 2009 Dec. 15.46, 16.69, 17.46, 20.46, and 23.68: comp.-star mags taken from SkyMap Pro v6.0 software [WYA]. Comet 144P/Kushida 2009 Jan. 16.81: Guide 8.0 software used for comp.-star mags [TOT03]. Jan. 20.71, 24.72, and Feb. 19.79: Guide 8.0 software used for comp.-star mags [SAN07]. Feb. 15.78: Guide 8.0 software used for comp.-star mags [VAS06]. Comet 157P/Tritton 2009 Sept. 24.59: Guide 8.0 software used for comp.-star mags; comp. star has B-V = +0.53 [TSU02]. Oct. 21.52: Guide 8.0 software used for comp.-star mags; comp. star has B-V = +1.15 [TSU02]. Nov. 6.48: Guide 8.0 software used for comp.-star mags; comp. star has B-V = +0.46 [TSU02]. Nov. 14.56: Guide 8.0 software used for comp.-star mags; comp. star has B-V = +0.42 [TSU02]. Nov. 19.51: Guide 8.0 software used for comp.-star mags; B-V of comp. stars were +0.58, +0.74 and +0.78 [YOS02]. Dec. 4.44: Guide 8.0 software used for comp.-star mags; comp. star has B-V = +0.50 [YUS]. Comet 169P/NEAT 2009 Nov. 21.38: Guide 8.0 software used for comp.-star mags; comp. star has B-V = +0.69 [YUS]. Nov. 21.41, Dec. 7.42, and 17.43: comp.-star mags taken from SkyMap Pro v6.0 software [WYA]. Comet 217P/LINEAR 2009 Sept. 24.75: Guide 8.0 software used for comp.-star mags; comp. star has B-V = +0.51 [TSU02]. Oct. 15.74: Guide 8.0 software used for comp.-star mags [TSU02]. Oct. 31.68, Nov. 10.50, 11.51, 15.68, 16.56, 21.53, 25.70, Dec. 7.48, 15.47, 16.69, 17.47, and 23.69: comp.-star mags taken from SkyMap Pro v6.0 software [WYA]. Nov. 14.67: Guide 8.0 software used for comp.-star mags; comp. star has B-V = +0.33 [TSU02]. Nov. 19.67: Guide 8.0 software used for comp.-star mags [NAG04]. Nov. 19.76: Guide 8.0 software used for comp.-star mags [YOS02]. Comet 219P/LINEAR 2009 Dec. 4.39: Guide 8.0 software used for comp.-star mags; comp. star has B-V = +0.61 [YUS]. Comet 224P/LINEAR-NEAT 2009 Sept. 24.63: Guide 8.0 software used for comp.-star mags; comp. star has B-V = +0.54 [TSU02]. Comet 226P/Pigott-LINEAR-Kowalski 2009 Sept. 24.81: Guide 8.0 software used for comp.-star mags; comp. star has B-V = +0.50 [TSU02]. Comet C/2006 W3 (Christensen) 2009 May 24.00: Guide 8.0 software used for comp.-star mags [SAR02]. July 16.90 and 20.96: Guide 7.0 software used for comp.-star mags [SAR02]. June 18.94, July 16.94, and Aug. 21.83: Guide 8.0 software used for comp.-star mags [SZA]. June 26.24, July 20.88, Aug. 11.86, 15.82, Sept. 10.81, 12.81, and 21.78: Guide 8.0 software used for comp.-star mags [VAS06]. July 12.92, 20.88, and Sept. 22.84: Guide 8.0 software used for comp.-star mags [SAN07]. July 16.90: Guide 7.0 software used for comp.-star mags [KUL02]. Aug. 24.85 and Sept. 22.87: Guide 8.0 software used for comp.-star mags [TOT03]. Sept. 7.51: Guide 8.0 software used for comp.-star mags; comp. star has B-V = +0.40 [TSU02]. Oct. 31.40, Nov. 1.39, 3.40, 9.39, 10.42, 11.40, 12.42, 15.40, 16.40, 20.46, and 21.43: comp.-star mags taken from SkyMap Pro v6.0 software [WYA]. Oct. 21.41: Guide 8.0 software used for comp.-star mags; comp. star has B-V = +0.56 [TSU02]. Nov. 21.41: Guide 8.0 software used for comp.-star mags; comp. star has B-V = +0.59 [YUS]. Comet C/2006 S3 (LONEOS) 2009 Dec. 1.49: Guide 8.0 software used for comp.-star mags; comp. star has B-V = +0.49 [YUS]. Comet C/2007 VO53 (Spacewatch) 2009 Nov. 7.55: Guide 8.0 software used for comp.-star mags; B-V of comp. stars were +0.60, +0.69 and +0.71 [YOS02]. Comet C/2007 N3 2009 Jan. 9.19, Feb. 6.16, 19.91, 27.87, 28.85, Mar. 10.74, 12.76, 14.81, and 19.84: Guide 8.0 software used for comp.-star mags [SAN07]. Feb. 19.19, Mar. 12.77, 14.77, 19.77, 20.77, and 24.81: Guide 8.0 software used for comp.-star mags [VAS06]. Feb. 25.83: Guide 8.0 software used for comp.-star mags [SZA]. Mar. 17.85: Guide 8.0 software used for comp.-star mags [TOT03]. Comet C/2007 Q3 (Siding Spring) 2009 Nov. 19.81: Guide 8.0 software used for comp.-star mags [YOS02]. Nov. 19.82: Guide 8.0 software used for comp.-star mags [NAG04]. Nov. 21.47: ref. star has V = 9.65 (B-V = +0.66) [AGU01]. Dec. 16.71, 17.71, and 23.71: comp.-star mags taken from SkyMap Pro v6.0 software [WYA]. Comet C/2008 N1 (Holmes) 2009 Sept. 7.45: Guide 8.0 software used for comp.-star mags; comp. star has B-V = +0.29 [TSU02]. Comet C/2008 P1 (Garradd) 2009 Sept. 24.53: Guide 8.0 software used for comp.-star mags; comp. star has B-V = +0.80 [TSU02]. Oct. 12.57: Guide 8.0 software used for comp.-star mags; B-V of comp. stars were +0.55, +0.62 and +0.78 [YOS02]. Oct. 21.50: Guide 8.0 software used for comp.-star mags; comp. star has B-V = +0.45 [TSU02]. Comet C/2008 T2 (Cardinal) 2009 Apr. 20.83: Guide 8.0 software used for comp.-star mags [VAS06]. Comet C/2009 E1 (Itagaki) 2009 Mar. 17.79 and 17.80: Guide 8.0 software used for comp.-star mags [SZA]. Mar. 18.76: Guide 8.0 software used for comp.-star mags [SAN07]. Mar. 21.78: Guide 8.0 software used for comp.-star mags [TOT03]. Comet C/2009 F6 (Yi-SWAN) 2009 Apr. 7.79, 11.80, and 12.83: Guide 8.0 software used for comp.-star mags [SZA]. Apr. 20.80: Guide 8.0 software used for comp.-star mags [VAS06]. Comet C/2009 O4 (Hill) 2009 Oct. 12.54: Guide 8.0 software used for comp.-star mags; B-V of comp. stars were +0.55, +0.60 and +0.63 [YOS02]. Comet P/2009 Q4 (Boattini) 2009 Nov. 14.72: Guide 8.0 software used for comp.-star mags; comp. star has B-V = +0.60 [TSU02]. Comet P/2009 Q5 (McNaught) 2009 Sept. 24.67: Guide 8.0 software used for comp.-star mags; comp. star has B-V = +0.44 [TSU02]. Nov. 14.57: Guide 8.0 software used for comp.-star mags; comp. star has B-V = +0.54 [TSU02]. Nov. 19.54: B-V of comp. stars were +0.55, +0.56 and +0.64 [YOS02]. Comet C/2009 R1 (McNaught) 2009 Oct. 12.47: Guide 8.0 software used for comp.-star mags; B-V of comp. stars were +0.55, +0.58 and +0.60 [YOS02]. Comet P/2009 T2 (La Sagra) 2009 Dec. 1.52: Guide 8.0 software used for comp.-star mags; comp. star has B-V = +0.67 [YUS].