OAA computing section circular NK 1246 P/2004 V3 (Siding Spring)
The following improved orbital elements, by S. Nakano, are from 52 observations 2004 Nov. 3 to 2005 Oct. 4. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.32 arc second. Epoch = 2004 Nov. 11.0 TT T = 2004 Nov. 11.07106 +/- 0.01243 (m.e.) TT Peri. = 322.32458 +/- 0.00179 Node = 356.09472 +/- 0.00023 (2000.0) Inc. = 50.45320 +/- 0.00013 q = 3.9377178 +/- 0.0000861 AU e = 0.4453613 +/- 0.0001433 a = 7.0996086 +/- 0.0002593 AU n' = 0.05210177 +/- 0.00000286 P = 18.917 +/- 0.0010363 years (+/- 0.38 day) The predicted orbit for the 2023 return is as follows: T = 2023 Nov. 5.54439 TT Epoch = 2023 Oct. 23.0 TT Peri. = 322.50113 e = 0.4448229 Node = 356.12709 (2000.0) a = 7.1144658 AU Inc. = 50.44381 n'= 0.05193865 q = 3.9497882 AU P = 18.976 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 0.6- 0.2+ 041115 415 0.3- 0.4- 041103 E12 0.4- 0.3+ 041106 474 0.2+ 0.1- 041117 I05 0.3- 0.1- 041103 E12 0.6- 0.4+ 041106 413 0.1+ 0.1- 041117 I05 0.1- 0.2- 041103 E12 0.3- 0.9+ 041106 474 0.2- 0.0 041117 I05 0.1- 0.5+ 041103 E12 0.3- 0.7+ 041106 413 0.1- 0.0 041117 415 0.4+ 0.0 041103 E12 0.0 0.6- 041106 413 0.0 0.0 041117 413 0.1- 0.1- 041103 E12 0.6- 0.4+ 041106 413 0.3+ 0.0 041117 415 0.3+ 0.2+ 041103 E12 0.4- 0.8+ 041106 413 0.3+ 0.0 041117 413 0.1- 0.1- 041103 E12 0.4+ 0.5+ 041107 413 0.3- 0.3- 041124 413 0.2- 0.3- 041103 413 0.0 0.0 041107 413 0.0 0.1- 041124 413 0.0 0.1- 041103 413 0.0 0.2+ 041108 413 0.1+ 0.0 041218 415 0.1- 1.3+ 041103 413 0.3+ 0.1+ 041108 413 0.1+ 0.1- 041218 415 (0.1- 3.2-) 041103 413 0.0 0.2+ 041112 413 0.1- 0.0 2005/ 041103 413 0.4+ 0.2+ 041112 413 0.0 0.0 050909 442 (3.4- 13.6-) 041103 413 0.3+ 0.0 041112 413 0.0 0.1- 051004 561 (5.2- 1.0+) 041103 413 0.5- 0.3+ 041112 415 0.4- 0.2+ 051004 561 0.6- 0.6+ 041103 413 0.3- 0.2+ 041112 415 0.3- 0.2- 051004 561 0.6+ 0.6- 041103 413 0.1+ 0.2+ 041112 415 0.1+ 0.4- 051008 A33 (3.8- 11.1-) 041105 413 0.1- 0.1- 041115 415 0.4- 0.1+ 041105 413 0.2+ 0.0 041115 415 0.3+ 0.3- ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 2005 Oct. 19