OAA computing section circular NK 1024 159P/LONEOS
The following improved orbital elements, by S. Nakano, are from 67 observations 1989-2004. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.55 arc second. Epoch = 2004 Mar. 16.0 TT T = 2004 Mar. 3.07424 +/- 0.00545 (m.e.) TT Peri. = 4.99851 +/- 0.00079 Node = 55.16130 +/- 0.00005 (2000.0) Inc. = 23.42151 +/- 0.00008 q = 3.6508445 +/- 0.0000123 AU e = 0.3806619 +/- 0.0000020 a = 5.8947519 +/- 0.0000046 AU n' = 0.06886615 +/- 0.00000008 P = 14.312 +/- 0.0000168 years T = 1989 Oct. 21.97156 TT Epoch = 1989 Nov. 10.0 TT Peri. = 3.89228 e = 0.3839808 Node = 56.46319 (2000.0) a = 5.9210738 AU Inc. = 23.26116 n'= 0.06840744 q = 3.6474952 AU P = 14.408 years The predicted orbit for the 2018 return is as follows: T = 2018 May 22.81796 TT Epoch = 2018 June 11.0 TT Peri. = 4.76414 e = 0.3816129 Node = 55.02424 (2000.0) a = 5.8623995 AU Inc. = 23.46245 n'= 0.06943700 q = 3.6252322 AU P = 14.194 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1989/ 031101 704 0.4+ 0.3+ 031217 699 0.1- 0.4- 891217 261 0.4- 0.1- 031101 704 0.0 0.1+ 031217 699 0.3- 0.0 891217 261 0.9+ 0.8- 031118 703 0.8+ 0.3- 031217 699 1.3+ 0.0 1991/ 031118 703 1.1- 0.2+ 031217 699 0.9+ 0.6+ 910219 261 0.3- 1.0+ 031118 703 0.2+ 0.1- 031218 246 0.4+ 0.0 910219 261 0.6+ 0.1- 031118 703 1.5- 0.3- 031218 246 0.6+ 0.6- 2003/ 031119 644 0.6+ 0.1+ 031218 246 0.1+ 0.2+ 031016 699 0.3- 0.6+ 031119 644 0.2+ 0.2- 031218 246 0.3+ 0.5- 031016 699 0.7+ 0.5+ 031119 644 0.0 0.1+ 031218 246 0.4+ 0.5- 031016 699 1.1- 0.6- 031121 699 0.6+ 0.8- 031218 246 0.2+ 0.3- 031016 699 (2.6- 2.5-) 031121 699 0.5- 0.4- 031218 246 0.3+ 0.1- 031021 704 0.1+ 0.8+ 031121 699 0.3+ 0.5- 031218 246 0.0 0.2- 031021 704 0.9- 0.4+ 031121 699 0.0 0.4- 031221 704 0.2- 0.4+ 031021 704 1.4- 0.4- 031130 704 0.3- 0.3+ 031221 704 0.5+ 0.5+ 031021 644 0.6- 0.3- 031130 696 0.2- 0.2- 031221 704 0.2+ 0.4+ 031021 644 0.1+ 0.2- 031130 696 0.1- 0.1- 031221 704 0.1+ 0.2+ 031021 644 0.1+ 0.6- 031130 704 0.9- 0.5+ 031223 704 0.3- 0.5+ 031023 699 1.1- 0.5- 031130 704 0.1- 0.5+ 031223 704 0.3+ 1.7+ 031023 699 0.8- 0.7+ 031208 204 0.3+ 0.7- 031223 704 0.0 0.4+ 031023 699 0.6- 0.4- 031208 204 0.3+ 0.0 031228 360 1.2+ 0.8+ 031023 699 0.4+ 1.0- 031208 204 1.0- 0.7+ 031228 360 0.6+ 0.6+ 031101 704 1.0- 0.4- 031211 620 0.1- 0.3- 2004/ 031101 704 0.3+ 0.3+ 031211 620 0.8+ 0.4- 040105 413 0.1+ 0.1- 031101 704 0.3+ 0.3+ 031212 620 0.3+ 0.1- 040105 413 0.3+ 0.1+ ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 2004 Jan. 19