Nakano Note (Nakano wa Kangaeru noda) NK 2002 C/2010 A4 (Siding)
The following improved orbital elements, by S. Nakano, are from 106 observations 2010 Jan. 12 to Oct. 8. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.65 arc second. The comet has passed 2.73 AU from Saturn on 2008 Sept. 27 and will pass 3.19 from Jupiter on 2011 June 19 UT Epoch = 2010 Oct. 11.0 TT T = 2010 Oct. 8.76131 +/- 0.00174 (m.e.) TT Peri. = 271.69037 +/- 0.00067 Node = 346.68581 +/- 0.00006 (2000.0) Inc. = 96.73035 +/- 0.00008 q = 2.7379799 +/- 0.0000179 AU e = 0.9904008 +/- 0.0000088 1/a = +0.0035059 +/- 0.0000032 1/AU origin = +0.003618 (Q= 7) future = +0.003687 The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2010/ 100114 D90 0.3+ 0.4- 100204 E85 0.4+ 0.1- 100112 E12 0.0 0.3- 100114 D90 0.2+ 0.5- 100206 D96 0.6- 1.2- 100112 E12 0.5- 0.2+ 100114 D90 0.9+ 1.4- 100206 D96 0.1+ 0.7- 100112 E12 0.4- 0.6+ 100116 204 0.2- 0.0 100206 D96 0.3- 1.4- 100113 I20 0.7- 0.1+ 100116 204 0.0 0.3+ 100212 D96 0.8+ 1.6+ 100113 I20 0.1- 0.5+ 100116 415 0.7- 0.1- 100212 D96 (1.2+ 2.0+) 100113 I20 0.4+ 0.6+ 100116 415 0.9- 1.5+ 100217 D96 0.7+ 0.5+ 100113 H01 0.7+ 0.0 100116 372 0.3+ 0.4+ 100217 D96 0.5+ 0.3+ 100113 H01 0.6+ 0.0 100116 372 0.6+ 0.3+ 100218 E16 0.3- 0.2- 100113 H01 0.6+ 0.1- 100116 372 0.2+ 0.4- 100218 E16 0.3- 0.1- 100113 H01 0.6+ 0.1- 100117 372 0.9+ 0.3+ 100218 E16 0.2- 0.0 100113 H01 0.7+ 0.2- 100117 372 0.4+ 0.0 100226 213 0.1+ 0.2+ 100113 H06 0.4- 1.5+ 100117 372 0.4+ 0.2- 100226 213 0.2+ 0.6+ 100113 H06 0.6+ 0.0 100117 372 0.8- 1.2- 100306 423 1.3- 1.0- 100113 682 0.1+ 0.1+ 100120 415 0.3+ 0.0 100306 423 0.7- 0.5+ 100113 H06 0.4+ 0.2- 100120 415 0.0 0.0 100311 415 0.3- 0.1+ 100113 682 0.8- 1.0+ 100122 349 1.3- 1.1+ 100311 415 0.6- 0.3+ 100113 H06 0.2+ 0.0 100122 349 (2.4- 2.1+) 100317 415 0.3- 0.5- 100113 H21 0.8- 0.1+ 100122 349 (2.3- 1.0+) 100317 415 1.0- 0.2- 100113 H21 0.3- 0.1- 100122 349 (2.5- 0.8+) 100317 372 0.8- 0.1+ 100113 H21 1.0- 0.8+ 100122 900 1.1- 0.9- 100317 372 0.7- 0.1- 100113 H21 1.2- 0.7- 100122 900 0.7+ 1.0- 100408 E85 (1.0+ 2.7+) 100113 H06 0.0 0.7+ 100123 D90 1.4+ 0.0 100408 E85 0.0 0.2+ 100113 H21 0.5- 1.2+ 100123 D90 1.1- 0.3+ 100408 E85 0.5- 0.1- 100113 H21 1.0- 0.3- 100123 D90 (2.0+ 1.1-) 100408 467 0.3- 0.0 100113 H06 0.2- 1.5+ 100123 D90 0.1- 0.2- 100408 467 0.1- 0.0 100113 H10 0.1+ 0.7+ 100123 D90 0.3+ 0.2+ 100408 467 0.4- 0.2- 100113 H10 0.8- 0.5+ 100123 D90 0.8+ 0.6- 100428 C51 1.8+ 0.4+ 100113 H10 1.5- 0.3- 100123 D90 0.8- 1.0- 100428 C51 1.1+ 0.1+ 100113 D90 0.6+ 0.7- 100124 349 0.2+ 1.3- 100428 C51 1.3+ 0.5+ 100113 D90 0.3- 0.4- 100124 349 0.4- 1.0- 100428 C51 1.1+ 0.4+ 100113 D90 0.1+ 0.7- 100124 372 1.5+ 0.9- 100428 C51 1.0+ 0.2+ 100114 I19 0.4- 0.2+ 100124 372 0.9+ 0.8- 100430 E10 (2.2+ 1.7-) 100114 I19 0.2- 0.6+ 100125 372 1.7+ 1.1+ 101005 D90 0.6- 0.4- 100114 I19 0.3- 0.5+ 100126 D96 1.0+ 0.1- 101005 D90 0.6- 0.2- 100114 926 0.3+ 0.0 100126 D96 1.0+ 0.4- 101005 D90 0.2- 0.3+ 100114 926 0.2+ 0.5- 100204 E85 0.0 0.3+ 101008 D90 0.1- 0.3- 100114 926 0.2+ 0.0 100204 E85 0.4- 0.1- 101008 D90 0.5+ 0.1- ( ) -------- Rejected Obs.
Associate of Central Bureau for Astronomical Telegrams Syuichi Nakano 2010 Oct. 13