OAA computing section circular NK 1036 P/2003 SQ215 (NEAT-LONEOS)

The following improved orbital elements, by S. Nakano, are from 43 observations 2003 Sept. 18 to 2004 Jan. 19. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.65 arc second. See in YC 2416. Epoch = 2004 Mar. 16.0 TT T = 2004 Mar. 24.22921 +/- 0.00823 (m.e.) TT Peri. = 137.30286 +/- 0.00156 Node = 257.64057 +/- 0.00318 (2000.0) Inc. = 5.54594 +/- 0.00009 q = 2.3042257 +/- 0.0000538 AU e = 0.5812585 +/- 0.0001807 a = 5.5027403 +/- 0.0004323 AU n' = 0.07635466 +/- 0.00000900 P = 12.908 +/- 0.0015210 years (+/- 0.56 day) The predicted orbit for the 2017 return is as follows: T = 2017 Jan. 25.94068 TT Epoch = 2017 Jan. 7.0 TT Peri. = 137.53900 e = 0.5835020 Node = 257.24763 (2000.0) a = 5.4747413 AU Inc. = 5.58154 n'= 0.07694115 q = 2.2802190 AU P = 12.810 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2003/ 031213 704 0.3- 0.5- 040119 809 0.5- 0.2+ 030918 644 0.3- 0.8+ 031213 704 0.3- 0.4- 040119 809 0.2- 0.2+ 030918 644 0.0 1.0+ 031213 704 0.6- 0.3+ 040119 809 0.3- 0.4+ 030918 644 0.5- 0.8+ 031222 704 1.1- 0.9- 040119 809 0.2- 0.4+ 030924 644 0.1- 0.6+ 031222 704 0.4+ 0.2- 040119 809 0.2- 0.5+ 030924 644 0.5- 0.4+ 031222 704 1.0- 0.1- 040119 809 0.4- 0.4+ 030924 644 0.2- 0.3+ 031222 704 0.3+ 0.7- 040119 809 0.1- 0.5+ 030927 699 (2.2+ 0.1-) 031222 704 1.0+ 1.6- 040119 809 0.3- 0.4+ 030927 699 1.4+ 0.8- 2004/ 040119 809 0.3- 0.4+ 030927 699 0.2+ 1.5- 040109 699 0.9+ 0.6- 040119 809 0.0 0.3+ 030927 699 0.4- 1.4- 040109 699 1.6+ 0.2- 040119 809 0.3- 0.5+ 031123 703 (0.1- 4.6-) 040109 699 (2.3+ 1.5+) 040119 809 0.3- 0.3+ 031123 703 1.4+ 0.8+ 040109 699 0.3- 0.2+ 040119 809 0.2- 0.4+ 031123 703 1.2+ 0.0 040117 620 1.0+ 0.3- 040119 620 0.6+ 0.7- 031123 703 (0.8+ 2.7-) 040117 620 0.1+ 0.8- 040119 620 1.2+ 0.3+ 031213 704 0.7- 0.1- 040119 809 0.8- 0.3+ 031213 704 0.4- 0.0 040119 809 0.4- 0.3+ ( ) -------- Rejected Obs.

Director, Computing Section Late edition Syuichi Nakano 2004 Jan. 25

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