OAA computing section circular NK 1684 146P/Shoemaker-LINEAR

The following improved orbital elements, by S. Nakano, are from 58 observations 1984 to 2008, including planetary perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas, Vesta, and non-gravitational effect of style II. The mean residual is +/- 0.80 arc second. See orbits in NK 655 and NK 1200. Epoch = 2008 May 14.0 TT T = 2008 May 21.34343 +/- 0.00106 (m.e.) TT Peri. = 316.83894 +/- 0.00040 Node = 53.56791 +/- 0.00011 (2000.0) Inc. = 23.07997 +/- 0.00009 q = 1.4177517 +/- 0.0000049 AU e = 0.6479153 +/- 0.0000013 a = 4.0267353 +/- 0.0000052 AU n' = 0.12197602 +/- 0.00000023 P = 8.080 +/- 0.0000155 years A1 = +0.398 +/- 0.067 A2 = -0.01927 +/- 0.00036 T = 1984 Sept.26.69638 TT Epoch = 1984 Sept.17.0 TT Peri. = 317.60130 e = 0.6666725 Node = 55.49998 (2000.0) a = 3.9605937 AU Inc. = 21.58659 n'= 0.12504423 q = 1.3201749 AU P = 7.882 years [ T = 1992 Aug. 21.60436 TT Epoch = 1992 Aug. 6.0 TT Peri. = 317.65602 e = 0.6656401 Node = 55.43068 (2000.0) a = 3.9708142 AU Inc. = 21.57061 n'= 0.12456176 q = 1.3276812 AU P = 7.913 years ] T = 2000 July 14.30953 TT Epoch = 2000 June 25.0 TT Peri. = 317.77148 e = 0.6667581 Node = 55.35821 (2000.0) a = 3.9589504 AU Inc. = 21.61658 n'= 0.12512209 q = 1.3192881 AU P = 7.877 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1984/ 000929 046 0.6+ 0.3- 001205 360 0.6+ 0.4+ 841118 688 (2.6+ 6.6-) 000929 046 0.0 0.1- 001229 360 0.0 0.0 841118 688 (0.8- 7.0-) 000929 046 0.0 0.1+ 001229 360 0.3- 0.2+ 841121 675 0.9+ 0.6+ 000929 118 0.8- 0.5+ 001230 699 1.5- 1.0- 841121 675 0.1- 1.1- 000929 118 1.1- 0.8+ 001230 699 0.5- 1.8- 841127 688 (1.5- 4.0+) 000929 557 1.0- 0.1- 001230 699 0.5- 0.7+ 841127 688 (1.6+ 7.1-) 000929 557 0.3- 0.0 001230 699 (2.2- 0.9-) 841128 372 0.2+ 0.5+ Y 000929 557 0.9- 0.0 2001/ 841130 675 1.5- 2.2- 001001 704 0.6+ 0.5+ 010220 867 0.3- 0.6- 841130 675 (3.6- 0.8-) 001001 704 0.3+ 0.4+ 010220 867 0.2- 1.4- 841218 801 0.8+ 0.4+ 001001 704 1.7- 1.2+ 010220 867 0.1- 0.8- 841220 707 1.9+ 0.3+ 001002 704 (2.1+ 2.9+) 2008/ 2000/ 001002 704 1.0+ 0.3- 080821 461 0.1+ 0.5+ 000927 704 (3.6- 3.2-) 001002 704 1.5- 0.6+ 080821 461 0.4- 0.7+ 000927 704 (3.7- 3.4-) 001106 704 (2.2+ 0.7+) 080825 461 0.4+ 0.2+ 000927 704 0.7- 1.2- 001106 704 0.2+ 0.9+ 080825 461 0.2+ 0.5- 000927 704 (4.6- 1.0-) 001106 704 1.2+ 1.2+ 080825 461 0.3+ 0.3- 000928 704 (3.0- 2.3+) 001106 402 1.5+ 0.0 080903 114 (2.1- 1.5-) 000928 704 0.6+ 0.2- 001106 402 0.7+ 0.7+ 080903 114 0.7- 1.3- 000928 704 0.1- 0.5+ 001106 402 (8.3- 3.0+) 080903 114 1.8- 1.6- 000928 684 0.3- 0.3- 001128 360 1.1+ 0.5+ 080903 114 1.2- 0.2- 000928 684 0.2+ 0.6- 001128 360 0.1+ 0.6+ 080903 114 1.6+ 1.2+ 000928 684 0.7- 0.3+ 001204 402 0.1- 0.4+ 080903 114 1.3+ 0.3+ 000929 046 0.2+ 0.1- 001204 402 1.2+ 0.2+ 080903 114 0.4+ 0.6+ 000929 046 0.9+ 0.5+ 001204 402 0.4+ 0.2+ 000929 046 0.1- 0.3+ 001205 360 0.8+ 0.7+ ( ) -------- Rejected Obs.

Director, Computing Section Syuichi Nakano 2008 Oct. 5

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