OAA computing section circular NK 1246R P/2004 V3 (Siding Spring)

The following improved orbital elements, by S. Nakano, are from 59 observations 2004 Nov. 3 to 2005 Oct. 24. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.46 arc second. Epoch = 2004 Nov. 11.0 TT T = 2004 Nov. 11.34436 +/- 0.01056 (m.e.) TT Peri. = 322.36555 +/- 0.00155 Node = 356.09293 +/- 0.00005 (2000.0) Inc. = 50.45293 +/- 0.00007 q = 3.9382644 +/- 0.0000197 AU e = 0.4462623 +/- 0.0000214 a = 7.1121481 +/- 0.0000389 AU n' = 0.05196404 +/- 0.00000043 P = 18.967 +/- 0.0001557 years (+/- 0.06 day) The predicted orbit for the 2023 return is as follows: T = 2023 Nov. 24.27937 TT Epoch = 2023 Dec. 2.0 TT Peri. = 322.55698 e = 0.4456690 Node = 356.12410 (2000.0) a = 7.1254603 AU Inc. = 50.44586 n'= 0.05181848 q = 3.9498633 AU P = 19.020 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2004/ 041106 474 0.1- 0.0 041117 415 0.3+ 0.4+ 041103 E12 0.3- 0.2+ 041106 413 0.1- 0.0 041117 413 0.1- 0.1+ 041103 E12 0.6- 0.2+ 041106 413 0.1+ 0.0 041124 413 0.2- 0.1- 041103 E12 0.3- 0.8+ 041106 413 0.3+ 0.1- 041124 413 0.1- 0.1+ 041103 E12 0.2- 0.5+ 041106 413 0.3+ 0.0 041218 415 0.3+ 1.4+ 041103 E12 0.1+ 0.7- 041107 413 0.3- 0.3- 041218 415 (0.3+ 3.1-) 041103 E12 0.5- 0.2+ 041107 413 0.0 0.1- 2005/ 041103 E12 0.3- 0.6+ 041108 413 0.1+ 0.0 050703 413 1.9+ 0.5+ 041103 E12 0.5+ 0.4+ 041108 413 0.0 0.1- 050704 413 0.2- 2.0- 041103 413 0.1+ 0.1- 041112 413 0.1- 0.2+ 050909 442 (3.0- 38.9-) 041103 413 0.0 0.1+ 041112 413 0.0 0.1+ 051001 G96 0.9- 0.3- 041103 413 0.4+ 0.0 041112 413 0.1- 0.0 051001 G96 0.6- 0.5- 041103 413 0.0 0.0 041112 415 0.5- 0.3+ 051001 G96 0.4- 0.8- 041103 413 0.4+ 0.0 041112 415 0.3- 0.1- 051001 G96 1.6- 1.0- 041103 413 0.3+ 0.1- 041112 415 0.1+ 0.2- 051004 561 (9.1- 27.0-) 041103 413 0.5- 0.2+ 041115 415 0.4- 0.3+ 051004 561 (4.5- 27.4-) 041103 413 0.3- 0.1+ 041115 415 0.2+ 0.1- 051004 561 (3.3- 28.6-) 041103 413 0.1+ 0.1+ 041115 415 0.3- 0.3- 051007 G96 1.3- 1.6+ 041105 413 0.0 0.2- 041117 I05 0.3- 0.1+ 051008 A33 (8.4- 39.3-) 041105 413 0.3+ 0.1- 041117 I05 0.1- 0.0 051024 413 2.1+ 0.8+ 041106 474 0.6- 0.1+ 041117 I05 0.1- 0.8+ 051024 413 1.7+ 1.0+ 041106 474 0.2+ 0.2- 041117 415 0.3+ 0.2+ 041106 413 0.1+ 0.2- 041117 413 0.1- 0.1+ ( ) -------- Rejected Obs.

Director, Computing Section Syuichi Nakano 2005 Nov. 3

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