OAA computing section circular NK 1118 P/2003 WC7 (LINEAR-Catalina)
The following improved orbital elements, by S. Nakano, are from 94 observations 2003 Nov. 18 to 2004 Apr. 11. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.63 arc second. Epoch = 2004 Feb. 5.0 TT T = 2004 Feb. 5.74594 +/- 0.00047 (m.e.) TT Peri. = 341.05752 +/- 0.00025 Node = 89.88803 +/- 0.00025 (2000.0) Inc. = 21.21997 +/- 0.00012 q = 1.6548887 +/- 0.0000082 AU e = 0.6809380 +/- 0.0000276 a = 5.1867314 +/- 0.0000865 AU n' = 0.08343791 +/- 0.00000209 P = 11.812 +/- 0.0002955 years (+/- 0.11 day) The predicted orbit for the 2015 return is as follows: T = 2015 Dec. 5.17737 TT Epoch = 2015 Dec. 4.0 TT Peri. = 342.37924 e = 0.6797208 Node = 88.77520 (2000.0) a = 5.1815887 AU Inc. = 21.46146 n'= 0.08356216 q = 1.6595549 AU P = 11.795 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2003/ 040202 699 0.1- 0.2- 040222 H41 1.4- 0.8- 031118 704 0.3+ 0.4- 040202 699 0.3+ 1.2- 040223 213 0.5+ 0.2- 031118 704 0.2+ 0.1- 040202 699 1.4+ 0.6+ 040223 213 0.1- 0.3- 031118 704 0.0 0.9+ 040206 213 (4.0+ 1.8-) 040307 699 0.9+ 0.9- 031118 704 0.4- 0.5+ 040209 104 0.3- 0.1+ 040307 699 1.5+ 0.3- 031119 704 0.5- 0.2+ 040209 104 0.4- 0.0 040307 699 0.1- 0.8- 031119 704 0.8+ 0.7- 040209 104 0.5- 0.2+ 040307 699 1.2+ 0.4- 031119 704 0.7- 0.9- 040209 204 0.5- 0.3+ 040314 D83 1.6- 0.3- 031119 704 0.3+ 0.3- 040209 204 0.7- 0.4+ 040314 D83 (0.2- 3.2-) 031119 704 0.4+ 0.6- 040209 204 0.1- 0.9+ 040319 704 0.1- 0.5+ 031216 703 0.1- 1.1+ 040212 360 0.3- 0.5- 040319 704 (5.5+ 1.0+) 031216 703 0.1+ 0.8+ 040212 360 0.5- 0.5- 040319 704 0.8+ 0.4+ 031216 703 (0.2- 2.1+) 040215 349 0.3- 0.1+ 040319 704 1.3+ 1.0+ 031216 703 0.1+ 0.4+ 040215 349 0.0 0.5- 040322 704 0.3- 0.5+ 2004/ 040215 349 0.0 0.1- 040322 704 0.6+ 0.1+ 040131 703 0.2- 0.7+ 040215 349 0.5- 0.8- 040322 704 0.6+ 0.2+ 040131 703 0.9- 0.1+ 040216 A33 0.9- 0.5- 040322 704 0.6+ 0.2+ 040131 703 0.3+ 0.7+ 040216 A33 0.3- 1.0- 040322 704 0.3- 0.9- 040131 703 0.3- 0.6+ 040216 A33 0.4- 0.5- 040323 704 0.9- 0.3+ 040131 118 0.0 1.6- 040217 704 0.3- 0.3+ 040323 704 0.0 0.0 040131 118 0.3- 1.1- 040217 704 1.3+ 0.1+ 040323 704 0.0 1.0+ 040131 118 0.0 0.0 040217 704 0.4+ 0.3+ 040323 701 1.7+ 1.0+ 040131 118 0.4- 0.4- 040217 704 0.4+ 0.4+ 040323 704 0.6+ 0.6+ 040131 859 0.8+ 0.2+ 040217 704 0.9+ 0.3+ 040323 701 1.3- 0.7- 040131 859 0.6- 0.4+ 040218 D83 (2.8- 0.6-) 040323 704 0.1- 1.2+ 040131 859 0.4- 0.0 040218 D83 0.5+ 0.6- 040323 701 0.7- 0.8- 040201 673 0.5- 0.8+ 040218 D83 (0.4+ 3.1-) 040408 360 1.2- 0.5- 040201 673 0.2- 0.5+ 040220 215 0.5+ 0.4- 040408 360 0.0 0.5- 040201 673 0.9+ 1.1+ 040220 215 0.5- 0.3- 040408 360 0.9- 1.1- 040201 673 0.1- 0.7+ 040220 A33 0.4+ 0.8- 040411 360 0.1+ 0.2+ 040201 413 0.5- 0.0 040220 A33 0.0 0.4- 040411 360 0.2- 1.0+ 040201 413 0.4- 0.2- 040222 H41 0.6+ 0.7+ 040411 360 0.1+ 0.6+ 040201 413 0.3- 0.2- 040222 H41 (1.6+ 2.6-) 040411 360 0.4- 0.6+ 040201 413 0.3- 0.3- 040222 H41 0.9+ 0.2- 040202 699 0.5+ 0.1- 040222 H41 1.0+ 0.6+ ( ) -------- Rejected Obs.
Director, Computing Section Late edition Syuichi Nakano 2004 Apr. 24