Nakano Note (Nakano wa Kangaeru noda) NK 2659 P/Christensen (2007 C1 = 2014 C4)
The following improved orbital elements, by S. Nakano, are from 138 observations 2007 to 2014. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.53 arc second. The comet has passed 1.09 AU from Jupiter on 2009 June 28 UT. The recovery observations show the residuals of +596" (R. A.) and -358" (Decl.) from the prediction in NK 1926 (= HICQ 2013) with the delta-T correction = -0.50 day. Epoch = 2013 Nov. 4.0 TT T = 2013 Nov. 15.66346 +/- 0.00209 (m.e.) TT Peri. = 100.57319 +/- 0.00096 Node = 52.86968 +/- 0.00037 (2000.0) Inc. = 7.87499 +/- 0.00003 q = 2.1945668 +/- 0.0000069 AU e = 0.3883011 +/- 0.0000019 a = 3.5876585 +/- 0.0000044 AU n' = 0.14503988 +/- 0.00000027 P = 6.795 +/- 0.0000125 years T = 2007 Mar. 5.24924 TT Epoch = 2007 Mar. 1.0 TT Peri. = 95.60742 e = 0.4124518 Node = 57.11781 (2000.0) a = 3.4901911 AU Inc. = 8.02175 n'= 0.15115770 q = 2.0506554 AU P = 6.520 years The predicted orbit for the 2020 return is as follows: T = 2020 Sept. 6.37732 TT Epoch = 2020 Aug. 19.0 TT Peri. = 100.69182 e = 0.3868357 Node = 52.82584 (2000.0) a = 3.5931300 AU Inc. = 7.87011 n'= 0.14470871 q = 2.2031791 AU P = 6.811 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2007/ 070215 673 0.5+ 0.6+ 070304 213 0.4+ 0.3- 070209 703 0.6- 0.3+ 070215 673 0.6+ 0.1+ 070306 850 0.4+ 0.3+ 070209 703 1.0- 0.2- 070215 673 0.1+ 0.3+ 070306 850 0.3- 0.1+ 070209 703 0.6- 0.3+ 070215 104 1.4+ 0.7- 070307 461 0.0 0.0 070209 703 (2.0- 0.5-) 070215 104 0.3- 0.3+ 070307 461 0.4+ 1.3- 070209 A13 0.2- 0.0 070215 104 0.3- 0.4+ 070308 850 0.1+ 0.6- 070209 A13 0.1- 0.0 070215 215 0.7+ 0.3- 070308 850 0.2+ 0.1+ 070209 A44 0.1- 0.4+ 070215 215 1.0+ 0.3- 070308 850 0.6+ 0.3- 070209 A44 0.5- 0.1+ 070215 215 1.3+ 0.3- 070308 850 0.2- 0.2- 070209 A13 0.6- 0.1+ 070215 A13 0.3- 0.0 070308 673 0.0 0.8+ 070209 A44 0.4- 0.3- 070215 A13 0.2- 0.0 070308 673 0.1+ 0.7+ 070209 176 0.8- 0.3+ 070215 213 0.2- 0.4- 070308 673 0.0 0.1+ 070209 176 0.4- 0.0 070215 213 0.2- 0.1+ 070308 673 0.2+ 0.0 070209 176 0.5- 0.2- 070215 213 0.1- 0.2+ 070310 213 0.8+ 0.6- 070209 176 0.1+ 0.3- 070215 A13 0.3- 0.1+ 070310 213 0.8+ 0.5- 070210 473 0.4- 0.2+ 070216 850 0.2- 0.6+ 070310 213 0.8+ 0.5- 070210 473 0.0 0.3+ 070216 850 0.3- 0.6+ 070310 224 1.7+ 0.1- 070210 473 0.1+ 0.5+ 070216 850 1.1+ 0.2+ 070310 224 0.5+ 0.3+ 070210 I77 1.0- 0.1- 070216 850 1.9+ 0.5+ 070310 224 0.6+ 1.5+ 070210 I77 0.3- 0.5+ 070216 850 0.5- 0.2+ 070311 246 0.7+ 0.1+ 070210 I77 0.2- 0.4+ 070216 850 0.5- 0.6+ 070311 246 0.5+ 1.2- 070210 703 0.3+ 1.0+ 070216 104 (4.2- 4.7-) 070311 246 0.6+ 0.2+ 070210 703 0.0 0.8+ 070216 104 0.3- 0.1- 070311 246 0.5+ 0.2- 070210 703 0.5- 0.7+ 070216 104 0.0 0.1+ 070311 246 0.2+ 0.1+ 070210 703 0.6- 0.3+ 070217 850 0.4+ 0.2- 070313 850 0.6+ 0.7- 070210 H36 0.2- 0.2- 070217 850 0.2- 0.5- 070313 850 0.1- 0.7- 070210 H36 0.1- 0.2- 070217 850 0.3- 0.1- 070313 850 0.1+ 0.5- 070210 H36 (2.7+ 0.9-) 070217 850 0.2- 0.5- 070317 170 0.1- 0.6- 070211 473 0.9- 0.4+ 070218 246 0.3+ 0.8+ 070317 170 0.4- 0.2+ 070211 473 0.3- 0.1+ 070218 246 0.4+ 0.2+ 070317 170 0.7- 0.2- 070211 473 0.1+ 0.7- 070218 246 0.2+ 0.1- 070322 300 0.2+ 0.2- 070211 204 0.3- 0.1- 070218 246 0.0 0.6+ 070322 300 0.6+ 0.1+ 070211 204 0.1+ 0.1+ 070218 246 0.3+ 0.4+ 070322 300 1.2+ 0.0 070211 850 0.4- 0.5- 070218 246 0.3+ 0.3+ 070322 300 0.8+ 0.1+ 070211 850 0.2+ 0.1+ 070219 850 0.3- 0.4- 070407 213 0.3- 0.9+ 070211 850 0.4+ 0.0 070219 850 0.6- 0.7- 070407 213 0.3- 0.6+ 070211 372 0.8- 0.5+ 070219 850 0.2+ 0.6- 070407 213 0.3- 0.7+ 070211 349 0.4+ 0.1- 070219 850 0.3+ 0.6- 070412 561 1.3- 1.5+ 070211 349 0.7+ 0.0 070219 850 0.3- 0.4- 070412 561 0.5+ 1.0+ 070211 349 0.4+ 0.3+ 070219 850 0.2- 1.0- 070412 561 1.5- 0.3- 070212 372 0.5- 0.0 070219 850 0.1- 0.6- 2014/ 070212 372 0.1+ 1.0+ 070222 J70 (5.4- 6.1-) 140209 291 0.1- 0.1- 070214 J70 (2.1- 0.6+) 070222 J70 1.5- 1.0- 140209 291 0.1+ 0.2- 070214 J70 1.1- 0.4+ 070222 J70 0.7- 0.8- 140209 291 0.4+ 0.2- 070215 J70 0.6- 0.2+ 070222 J70 0.0 0.3- 140323 291 0.3- 0.2- 070215 J95 0.1- 0.8- 070224 349 0.1- 0.5- 140323 291 0.4- 0.0 070215 J95 0.0 0.0 070224 349 0.1- 0.4- 140323 291 0.1- 0.2- 070215 J95 0.7- 0.1- 070303 213 0.2- 0.3- 070215 673 0.8+ 0.5- 070303 213 0.0 0.3- ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2014 Mar. 29