OAA computing section circular NK 1147 P/1994 X1 (McNaught-Russell)
The following improved orbital elements, by S. Nakano, are from 126 observations 1994 Dec. 12 to 1995 Apr. 17. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.73 arc second. Epoch = 1994 Sept. 5.0 TT T = 1994 Sept. 7.94655 +/- 0.00189 (m.e.) TT Peri. = 171.14753 +/- 0.00075 Node = 218.00933 +/- 0.00075 (2000.0) Inc. = 29.07427 +/- 0.00010 q = 1.2768703 +/- 0.0000143 AU e = 0.8157155 +/- 0.0000198 a = 6.9287999 +/- 0.0001080 AU n' = 0.05404021 +/- 0.00000126 P = 18.238 +/- 0.0004266 years (+/- 0.16 day) The predicted orbit for the 2012 return is as follows: If the pre-discovery observations in 1994 October are included, T will be 2012 Dec. 7.46 TT. T = 2012 Dec. 4.56556 TT Epoch = 2012 Dec. 19.0 TT Peri. = 171.19320 e = 0.8153779 Node = 218.01163 (2000.0) a = 6.9326419 AU Inc. = 29.07908 n'= 0.05399530 q = 1.2799186 AU P = 18.254 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1994/ 941220 413 0.5- 0.6- 950105 897 1.0+ 0.3- 941013 607 (2.2+ 9.5+) 941220 413 0.6- 0.5- 950105 897 0.7+ 1.6+ 941013 607 (5.1+ 1.5+) 941221 413 0.5- 0.0 950106 372 0.0 0.2- 941212 413 (1.5- 2.7-) 941221 413 0.3- 0.2- 950106 372 1.5+ 0.1- 941212 413 1.9+ 0.4+ 941221 413 0.1- 0.5+ 950108 372 (3.6+ 1.4-) 941214 422 0.8+ 0.1+ 941221 413 0.0 0.6+ 950108 372 (4.5+ 1.3-) 941214 422 (2.8+ 0.7+) 941222 413 0.2- 0.0 950112 413 0.0 0.5- 941214 897 1.2- 1.2+ 941222 413 0.2- 0.1- 950112 413 0.1- 0.6- 941214 897 1.7- 0.9- 941222 896 0.7- 0.8- 950112 413 0.1- 0.5- 941214 897 1.4- 1.5+ 941223 360 0.1+ 0.4- 950113 413 0.6+ 0.7+ 941214 897 0.2- 1.1+ 941223 360 0.0 0.0 950113 413 0.5+ 0.1- 941214 887 1.0+ 1.3- 941223 360 0.1- 0.4+ 950113 413 0.1- 0.2+ 941214 887 0.9+ 0.5+ 941223 864 0.5- 0.4- 950114 413 0.0 0.2- 941215 557 0.5+ 0.0 941223 864 0.1- 1.0- 950114 413 0.2+ 0.7- 941215 557 0.6+ 0.3+ 941223 864 0.2+ 0.1+ 950115 413 0.2- 0.7- 941215 557 0.5+ 0.8+ 941224 897 0.8- 1.6+ 950115 413 0.2+ 0.5- 941215 557 1.2+ 1.2+ 941224 897 1.6- 1.0- 950124 897 1.1+ 1.7+ 941215 897 1.8+ 0.4- 941224 897 1.2+ 0.7+ 950124 897 (2.5+ 3.7+) 941215 897 0.2- 0.3- 941224 897 0.5+ 0.8+ 950124 897 (2.2+ 4.3+) 941215 897 1.9+ 1.7+ 941226 292 (2.6+ 2.3+) 950124 897 (2.6+ 3.1+) 941215 540 0.2+ 1.6+ 941226 292 (0.9+ 3.3+) 950125 372 0.3+ 0.9+ 941215 540 0.1+ 0.9+ 941227 360 0.2- 0.3- 950126 360 0.7+ 0.5+ 941215 540 0.7+ 1.2+ 941227 360 0.4+ 1.0+ 950126 360 0.2- 1.3+ 941216 864 0.2- 0.5- 941227 360 0.0 0.6- 950129 691 0.5- 0.5- 941216 864 0.0 0.2- 941228 897 1.6- 0.6- 950129 691 0.4- 0.1- 941216 864 0.0 0.5- 941228 474 0.2+ 0.3- 950131 372 (3.9- 7.9+) 941218 413 0.5- 1.1- 941228 897 0.2- 1.3+ 950201 413 0.0 0.1+ 941218 413 0.2- 0.6- 941228 474 1.1- 0.2+ 950201 413 0.0 0.1- 941218 413 0.4- 0.8- 941229 897 0.6- 0.9- 950201 104 0.1+ 0.3- 941218 413 0.5- 0.3- 941229 372 0.2+ 1.2- 950201 104 0.2+ 0.9+ 941218 413 0.4- 0.3- 941229 897 0.3- 0.3+ 950201 104 0.5+ 0.0 941218 897 (1.0- 2.1+) 941229 887 0.5- 1.2+ 950202 413 0.0 0.2- 941218 897 0.3+ 0.9- 941229 887 0.1+ 1.0+ 950202 413 0.0 0.8- 941218 897 (2.6- 0.4-) 941229 887 0.5+ 0.0 950209 413 0.3+ 0.1- 941218 897 0.3- 1.0+ 941231 693 (2.2- 0.1-) 950209 413 0.3+ 0.2- 941218 897 (1.7- 2.4+) 941231 693 1.7- 0.1- 950220 413 0.8- 0.3- 941218 897 1.4+ 0.5+ 941231 693 0.8+ 0.1- 950220 413 1.0- 0.3- 941218 413 0.8- 0.7- 941231 693 0.7- 0.2+ 950221 413 0.9- 0.7- 941218 413 0.6- 0.6- 1995/ 950224 360 (2.3- 0.3+) 941219 413 0.0 0.6- 950101 864 0.0 0.5- 950224 360 0.8- 0.9+ 941219 413 0.5- 0.6- 950101 864 0.6- 0.0 950224 360 0.3- 0.3+ 941219 413 0.5- 0.7- 950102 372 0.1+ 0.2+ 950307 413 0.2+ 0.8+ 941219 413 0.3- 0.6- 950102 887 0.2+ 1.7+ 950307 413 0.5+ 0.9+ 941219 413 0.5- 0.7- 950102 372 1.4+ 1.7- 950321 413 0.0 0.9- 941219 413 0.3- 0.2- 950102 887 1.5+ 0.6+ 950321 413 0.2+ 0.0 941219 413 0.6- 0.4+ 950104 474 0.3+ 0.9- 950322 413 0.3+ 0.2- 941220 413 0.8- 0.4- 950104 474 0.8- 0.5- 950417 413 0.5- 0.1+ 941220 413 0.4- 0.6- 950104 372 0.7+ 0.4- 941220 413 0.6- 0.5- 950105 897 1.9+ 1.0- ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 2005 Jan. 5