OAA computing section circular NK 1377 181P/Shoemaker-Levy 6 (1991 V1 = 2006 U4)
The following improved orbital elements, by S. Nakano, are from 41 observations 1991 to 2006. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 1.09 arc seconds. See previous orbits in NK 635 and NK 944 (= HICQ 2006). Epoch = 2006 Dec. 11.0 TT T = 2006 Nov. 25.00129 +/- 0.00123 (m.e.) TT Peri. = 333.55792 +/- 0.00051 Node = 37.87289 +/- 0.00006 (2000.0) Inc. = 16.92675 +/- 0.00008 q = 1.1275501 +/- 0.0000033 AU e = 0.7066435 +/- 0.0000008 a = 3.8436168 +/- 0.0000040 AU n' = 0.13079585 +/- 0.00000020 P = 7.535 +/- 0.0000117 years T = 1991 Oct. 13.86430 TT Epoch = 1991 Oct. 31.0 TT Peri. = 333.13369 e = 0.7059117 Node = 37.93090 (2000.0) a = 3.8505842 AU Inc. = 16.85694 n'= 0.13044101 q = 1.1324116 AU P = 7.556 years [ T = 1999 May 6.38797 TT Epoch = 1999 May 22.0 TT Peri. = 333.36818 e = 0.7055370 Node = 37.83402 (2000.0) a = 3.8528293 AU Inc. = 16.89434 n'= 0.13032701 q = 1.1345157 AU P = 7.563 years ] The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1991/ 911113 411 (1.4+ 3.8+) 911201 104 (0.7+ 3.0+) 911103 675 (3.4- 1.9+) 911113 372 0.9- 1.4- 911203 056 (1.0+ 8.0+) 911103 675 (1.2+ 6.0-) 911113 372 0.1+ 0.5- 911203 104 1.4- 1.3+ 911103 675 0.2+ 0.7+ 911113 411 0.5+ 0.3+ 911203 104 (2.9- 4.1-) 911103 675 (3.2- 9.9-) 911125 372 (7.3+ 4.2+) 911204 372 1.7- 2.0+ 911106 675 1.0- 1.5+ 911125 411 1.4+ 0.1- 911209 411 (0.8- 2.5+) 911106 675 (2.1- 7.6-) 911125 411 1.4- 0.7+ 911209 411 0.6+ 0.1+ 911106 675 (1.1+ 4.0+) 911125 411 2.1+ 2.1+ 911209 411 0.6+ 0.7- 911106 675 (2.4- 4.3-) 911125 411 1.1+ 1.3+ 911209 372 2.1- 0.7- 911107 675 1.3+ 1.9- 911125 411 1.5+ 0.7- 911209 372 1.9- 1.3- 911107 675 1.1+ 2.1- 911126 046 (6.7- 10.8+) 911213 372 0.8+ 0.6- 911109 675 0.4- 0.9- 911126 046 (4.6- 1.3+) 1992/ 911109 675 0.1+ 0.2+ 911127 056 (3.7+ 4.1-) 920108 801 0.2- 1.3- 911110 675 0.5+ 0.1- 911127 046 (3.6- 3.3-) 920108 801 0.2- 1.6- 911110 675 (2.8- 8.2-) 911127 046 (7.5- 3.3-) 2006/ 911111 373 0.1+ 0.2+ 911127 056 (7.1+ 10.1+) 061026 413 0.1+ 0.1+ 911111 373 0.7- 1.8+ 911127 104 (1.3- 3.4+) 061026 413 0.3- 0.1+ 911111 896 (1.3- 7.2+) 911127 104 (2.4+ 3.5+) 061027 413 0.3+ 0.1+ 911111 896 0.3+ 1.5- 911128 657 1.1+ 1.2+ 061027 413 0.3+ 0.4+ 911112 402 0.8- 1.7- 911128 657 0.6+ 1.0+ 061027 474 0.2- 1.4+ 911112 402 (4.8+ 3.5+) 911129 540 0.5- 1.9+ 061027 474 0.1+ 0.6+ 911112 897 (4.3+ 3.0-) 911129 056 (6.1- 3.5+) 061027 474 0.5- 1.1+ 911112 897 (2.1+ 3.0+) 911129 540 2.0- 1.3- 061027 474 (1.4+ 3.2-) 911112 897 (3.3- 0.8-) 911129 056 (0.6- 4.6-) 911113 675 0.5+ 1.2+ 911201 104 1.7- 0.1+ ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 2006 Oct. 30