Nakano Note (Nakano wa Kangaeru noda) NK 1966 P/NEAT (2002 X2 = 2010 P1)
The following improved orbital elements, by S. Nakano, are from 140 observations 2002 to 2010. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.77 arc second. The correction to the prediction in NK 1463 (= HICQ 2009/2010) is delta-T= -0.74 day. RunOff values are +709" for R.A. and +445" for Decl.. See the previous orbits in NK 1014 and NK 1463. Epoch = 2010 Oct. 11.0 TT T = 2010 Oct. 4.27156 +/- 0.00173 (m.e.) TT Peri. = 351.92478 +/- 0.00075 Node = 74.97483 +/- 0.00006 (2000.0) Inc. = 23.52266 +/- 0.00008 q = 2.1238088 +/- 0.0000190 AU e = 0.4500371 +/- 0.0000028 a = 3.8617314 +/- 0.0000103 AU n' = 0.12987662 +/- 0.00000052 P = 7.589 +/- 0.0000305 years T = 2003 Mar. 29.60132 TT Epoch = 2003 Mar. 22.0 TT Peri. = 356.03520 e = 0.3732220 Node = 78.15478 (2000.0) a = 4.0344668 AU Inc. = 25.35411 n'= 0.12162556 q = 2.5287152 AU P = 8.104 years The predicted orbit for the 2018 return is as follows: T = 2018 May 15.92134 TT Epoch = 2018 May 2.0 TT Peri. = 352.10143 e = 0.4489515 Node = 74.92673 (2000.0) a = 3.8723440 AU Inc. = 23.50403 n'= 0.12934307 q = 2.1338493 AU P = 7.620 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2002/ 021213 204 0.3+ 0.3- 030201 J95 0.3- 0.7- 021005 704 0.8- 0.2- 021225 046 0.1+ 0.0 030202 704 0.2- 0.2- 021005 704 0.7- 0.3- 021225 046 0.6- 0.3- 030202 704 (2.2+ 1.1-) 021005 704 0.7- 0.4+ 021225 046 0.1- 0.4- 030202 704 0.8- 1.0+ 021005 704 0.4- 1.0- 021225 046 0.4+ 0.1- 030202 704 0.6+ 0.8- 021005 699 (2.7- 0.1+) 021225 046 0.4- 0.7+ 030202 704 (3.1+ 3.5-) 021005 699 (2.4- 0.3-) 021227 360 0.1+ 1.0- 030203 360 0.4+ 0.8- 021005 699 (2.6- 0.8+) 021227 360 0.1- 0.5- 030203 360 0.3- 0.4- 021005 699 (3.8- 0.1+) 021228 349 (2.7+ 1.6-) 030203 360 0.8+ 0.3- 021029 704 1.4- 0.2- 021228 349 0.3- 1.9- 030306 699 0.9+ 0.2- 021029 704 1.5- 0.3- 021228 A02 (3.2+ 2.9+) 030306 699 0.7+ 0.4- 021029 704 1.3- 1.1- 2003/ 030306 699 (2.2+ 0.9-) 021105 644 1.2- 0.0 030102 704 0.1+ 1.3+ 030306 699 1.2+ 0.4- 021105 644 1.2- 0.0 030102 704 1.6+ 0.0 031201 360 0.1- 1.5+ 021105 644 1.5- 0.1+ 030102 704 0.7+ 0.1+ 031201 360 0.3- 0.2+ 021206 699 1.6+ 1.2+ 030102 704 1.5- 0.3+ 031201 360 1.1- 0.4+ 021206 699 0.1+ 1.2+ 030102 704 1.7+ 0.9+ 031227 461 0.7+ 1.4+ 021206 699 0.6+ 0.7+ 030102 349 0.8+ 0.3+ 031227 461 0.4+ 0.8+ 021206 699 0.3+ 1.4+ 030102 349 0.4+ 0.3- 2004/ 021206 644 0.3- 0.3- 030102 349 1.0- 0.8- 040131 360 0.4+ 0.9+ 021206 644 0.1- 0.6- 030102 349 1.5+ 0.1+ 040131 360 0.2+ 1.5+ 021206 644 0.5- 0.2- 030103 213 (2.6- 0.8-) 040131 360 0.7+ 0.1+ 021207 644 0.0 0.6+ 030103 213 (1.3- 2.1+) 040218 360 0.3- 0.3- 021207 644 0.1- 0.6+ 030103 213 0.6+ 1.7- 040218 360 0.4- 1.0- 021207 644 0.0 0.5+ 030104 A02 0.2+ 0.4- 040218 360 0.7- 0.2- 021208 333 1.0- 0.1- 030104 A02 1.6+ 1.0+ 040221 A33 0.7+ 0.2- 021208 333 0.5+ 0.7+ 030104 A02 1.3+ 1.9- 040221 118 1.2+ 0.9+ 021208 333 0.4- 0.1- 030105 704 1.6- 1.4- 040221 118 0.9+ 0.1- 021208 926 (2.1+ 2.2-) 030105 704 0.2- 1.4- 040316 204 1.0+ 1.2- 021208 926 0.6+ 0.2+ 030105 704 0.6- 1.4- 040316 204 (2.7+ 1.0+) 021208 926 0.2- 0.7+ 030108 246 1.2+ 0.3- 2010/ 021208 246 0.2- 1.7+ 030108 246 1.1+ 0.0 100810 H06 1.5- 0.4+ 021208 246 0.4+ 1.2+ 030108 246 0.9+ 0.1- 100810 H06 1.2- 0.4+ 021208 246 0.2+ 1.3+ 030108 246 0.5+ 0.6- 100810 H06 1.0- 0.7+ 021208 246 0.5+ 1.4+ 030108 246 0.4+ 0.4- 100811 H06 1.0- 0.0 021208 246 0.4+ 1.6+ 030108 246 0.1- 0.3- 100811 H06 1.8- 0.1- 021209 926 0.1+ 0.2+ 030116 644 0.3+ 0.5- 100811 H15 0.0 0.2+ 021209 858 0.5- 0.6+ 030117 246 0.3- 0.5- 100811 H06 1.7- 0.0 021209 858 0.0 0.4+ 030117 246 0.2+ 0.7- 100811 H15 0.5+ 0.2+ 021209 858 0.7+ 0.6+ 030117 246 0.1+ 1.2- 100811 H15 0.3- 0.1- 021209 926 0.8+ 0.3+ 030117 246 0.4+ 0.2- 100811 H15 0.5- 0.1+ 021209 926 0.8- 0.1+ 030117 246 0.7+ 1.1- 100811 H06 0.7+ 0.5+ 021210 300 0.3- 0.0 030117 246 0.0 0.7- 100811 H06 0.3+ 0.6+ 021210 300 (0.0 3.5+) 030117 246 0.5- 1.5- 100811 349 0.8- 0.1- 021213 204 0.2+ 0.3- 030125 587 1.0- 0.5- 100811 349 0.9- 0.3+ 021213 204 0.5+ 0.4- 030125 587 0.1+ 1.0+ 100811 349 1.3- 0.1- 021213 204 0.2+ 0.1- 030125 232 (4.8+ 1.0+) 100814 367 0.6+ 0.4+ 021213 204 0.1+ 0.7- 030129 J95 1.4+ 0.7+ 100814 367 0.3+ 0.4+ 021213 204 0.4- 0.3+ 030129 J95 0.6- 0.5+ 100814 367 1.2+ 0.3+ 021213 204 0.1+ 0.2- 030201 A02 0.8- 1.2- 100816 349 1.6+ 0.4+ 021213 204 0.1+ 0.1+ 030201 A02 0.2+ 0.9+ 100816 D95 0.7+ 0.7+ 021213 204 0.1- 0.2- 030201 A02 0.6+ 0.8+ 100816 D95 0.3+ 0.8+ 021213 204 0.7+ 0.3+ 030201 J95 0.3+ 0.7- 100816 349 1.1+ 1.0+ ( ) -------- Rejected Obs.
Associate of Central Bureau for Astronomical Telegrams Syuichi Nakano 2010 Aug. 20