OAA computing section circular NK 1143 P/2004 R1 (McNaught)
The following improved orbital elements, by S. Nakano, are from 44 observations 2004 Sept. 2 to Nov. 9. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.71 arc second. Epoch = 2004 Aug. 23.0 TT T = 2004 Aug. 30.20726 +/- 0.00146 (m.e.) TT Peri. = 0.59939 +/- 0.00190 Node = 296.00842 +/- 0.00174 (2000.0) Inc. = 4.89038 +/- 0.00016 q = 0.9884679 +/- 0.0000109 AU e = 0.6821798 +/- 0.0000811 a = 3.1101478 +/- 0.0002553 AU n' = 0.17969357 +/- 0.00002212 P = 5.485 +/- 0.0006753 years (+/- 0.25 day) The predicted orbit for the 2010 return is as follows: T = 2010 Feb. 23.65640 TT Epoch = 2010 Feb. 13.0 TT Peri. = 0.68628 e = 0.6827575 Node = 295.96474 (2000.0) a = 3.1070383 AU Inc. = 4.89370 n'= 0.17996339 q = 0.9856845 AU P = 5.477 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2004/ 040906 E14 1.4+ 0.0 040916 E12 (2.2- 0.9+) 040902 E12 1.3- 0.3+ 040906 E14 0.4- 1.1- 040916 E12 1.4+ 0.7- 040902 E12 0.2+ 0.6+ 040906 E14 0.3+ 0.3- 040916 E12 1.4+ 0.8- 040902 E12 1.3+ 0.1- 040906 E14 0.1- 0.2- 040916 E12 1.8+ 0.3+ 040902 E12 0.0 0.2+ 040906 413 0.2- 0.1- 040916 E12 1.7+ 0.1- 040904 413 0.4+ 0.5- 040906 413 0.3- 0.1- 040917 J87 0.1- 0.1- 040904 413 0.8+ 0.0 040911 651 0.3+ 1.1+ 040917 J87 0.5- 1.1+ 040904 413 0.9- 0.1+ 040911 651 1.5- 0.8+ 040918 587 1.9- 0.4+ 040904 413 0.5- 0.2- 040911 651 0.0 0.1+ 040918 587 0.2- 0.7+ 040905 413 0.5- 0.1- 040913 360 1.4- 0.5+ 040918 587 (3.2- 0.9+) 040905 413 0.1- 0.3+ 040913 360 0.0 0.3+ 041017 587 0.1+ 0.2- 040906 673 0.9+ 0.5- 040913 360 1.3- 0.2- 041017 587 0.2+ 0.8- 040906 673 0.8+ 0.6- 040914 651 0.5+ 0.6+ 041106 413 0.3- 0.2+ 040906 673 1.5- 0.1- 040914 651 0.4- 1.5- 041107 413 0.5- 0.2+ 040906 673 0.3+ 0.2+ 040916 E12 (2.9- 1.5+) 041109 413 0.6+ 0.1+ 040906 673 0.0 0.3+ 040916 E12 (2.6- 0.3-) 040906 673 0.1+ 0.0 040916 E12 0.6- 0.2+ ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 2005 Jan. 3