OAA computing section circular NK 712 118P/Shoemaker-Levy 4
The following improved orbital elements, by S. Nakano, are from 242 observations 1991-1999. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.77 arc second. Epoch = 1997 Feb. 1.0 TT T = 1997 Jan. 12.11327 +/- 0.00013 (m.e.) TT Peri. = 301.98022 +/- 0.00013 Node = 152.09618 +/- 0.00012 (2000.0) Inc. = 8.47343 +/- 0.00001 q = 2.0211353 +/- 0.0000009 AU e = 0.4205112 +/- 0.0000002 a = 3.4877900 +/- 0.0000006 AU n' = 0.15131381 +/- 0.00000004 P = 6.514 +/- 0.0000016 years T = 1990 July 14.27730 TT Epoch = 1990 July 8.0 TT Peri. = 302.26426 e = 0.4209127 Node = 152.09724 (2000.0) a = 3.4873615 AU Inc. = 8.47213 n'= 0.15134171 q = 2.0194867 AU P = 6.512 years The predicted orbit for the 2003 return is as follows: T = 2003 July 16.82684 TT Epoch = 2003 July 20.0 TT Peri. = 302.09147 e = 0.4222017 Node = 152.03918 (2000.0) a = 3.4805511 AU Inc. = 8.48224 n'= 0.15178612 q = 2.0110563 AU P = 6.493 years The following residuals in seconds of arc are from the above orbital elements: 1991/ 961116 897 0.7- 0.5+ 970129 897 1.0+ 0.3+ 910209 675 (0.0 4.0-) 961116 897 0.9- 0.5+ 970129 108 1.7+ 1.2+ 910211 675 (4.1+ 0.3-) 961117 691 0.2- 0.5- 970129 108 (1.1+ 2.3-) 910211 675 (2.4- 0.3-) 961117 691 0.3- 0.4- 970130 360 1.0+ 0.8+ 910211 675 1.9- 0.4- 961119 900 0.7- 0.4+ 970130 360 0.6+ 0.3+ 910212 413 0.3- 0.5+ 961119 900 1.4- 0.4+ 970201 900 1.9+ 0.4+ 910212 372 1.7- 1.0- 961122 118 0.1- 0.4- 970201 900 (2.5+ 0.0 ) 910212 372 0.8- 0.1- 961122 118 0.5- 0.0 970201 108 1.5+ 0.4- 910213 413 0.4- 0.5- 961122 118 0.5- 0.2+ 970201 108 0.6+ 0.5- 910214 675 (5.5+ 2.5-) 961130 900 1.2- 1.6+ 970201 605 1.9+ 0.5+ 910216 801 (6.0- 0.4+) 961130 897 0.7- 0.2- 970201 605 (2.9+ 0.7-) 910216 801 0.6- 0.2+ 961130 897 0.8- 0.0 970201 605 2.1+ 1.2+ 910216 675 0.2+ 0.7- 961201 118 0.8- 0.1- 970205 861 0.3+ 0.4- 910216 675 0.1- 0.5+ 961201 108 1.1- 1.3- 970205 861 1.3+ 0.1- 910220 675 0.1+ 0.6- 961201 108 1.4- 0.6- 970207 108 0.8+ 1.1- 910220 675 2.0- 0.2- 961201 108 0.4+ 1.7- 970207 108 0.6+ 1.4+ 910220 372 1.2+ 0.4- 961202 900 1.0- 0.4- 970208 046 0.4+ 0.1- 910220 372 1.5+ 0.9+ 961202 900 1.0- 0.6- 970208 046 0.5+ 0.0 910225 413 0.5+ 0.5+ 961203 360 0.1- 0.7- 970208 046 0.7+ 0.1+ 910309 675 0.0 1.3- 961203 360 0.3- 0.9- 970208 108 1.8+ 0.9- 910309 675 1.5- 0.8- 961203 108 0.1+ 1.7- 970208 108 0.9+ 0.3- 910313 801 0.0 0.8+ 961203 108 0.8- 0.2- 970209 360 0.4+ 0.1+ 910313 801 0.0 0.5+ 961205 046 0.3- 0.5- 970209 360 0.3+ 0.1- 910316 801 0.1+ 0.6+ 961205 046 0.2- 0.6- 970210 118 0.8+ 0.0 910316 801 0.4- 0.1+ 961205 046 0.2- 0.5- 970210 118 1.0+ 0.1+ 910316 372 0.5+ 0.2- 961207 900 0.6- 0.1- 970210 118 1.0+ 0.1- 910316 372 (1.1+ 2.7+) 961207 900 0.6- 0.6- 970211 861 0.7+ 1.0+ 910412 801 0.9+ 0.6+ 961209 801 0.2- 1.5- 970211 861 0.7+ 0.6- 910412 801 1.2+ 0.1- 961209 801 0.1- 1.4- 970211 118 0.1+ 0.3- 910414 675 (1.0+ 2.6-) 961212 867 1.8- 0.8+ 970211 118 0.7+ 0.3- 910414 675 1.5- 2.0- 961212 867 1.3- 0.6+ 970211 118 0.5+ 0.2+ 910416 675 (5.2+ 3.9-) 961212 867 1.4- 0.5+ 970214 605 (2.4+ 0.4-) 910417 675 (3.3- 6.5+) 961214 691 0.4- 0.2- 970214 605 (2.2+ 0.7-) 910417 675 (2.2+ 3.1+) 961214 691 0.3- 0.3- 970220 118 1.2+ 0.0 910419 801 2.0+ 0.6- 961214 691 0.3- 0.3- 970220 118 0.9+ 0.0 910419 801 1.1+ 0.6- 961214 897 1.0- 0.1+ 970222 046 0.8+ 0.4+ 1995/ 961214 897 1.3- 0.0 970222 046 0.6+ 0.3+ 950622 691 0.3+ 0.1- 961216 118 0.6- 0.2- 970222 046 0.6+ 0.4+ 950622 691 1.4+ 0.3+ 961216 118 0.6- 0.2- 970224 360 0.4+ 0.4+ 950623 691 1.1+ 0.3+ 961216 046 0.5- 0.5- 970224 360 0.3+ 0.5+ 950623 691 1.8+ 0.1+ 961216 046 0.6- 0.5- 970224 900 1.4+ 0.5+ 950902 691 0.8+ 0.7+ 961216 046 0.5- 0.5- 970224 900 0.9+ 0.6+ 950902 691 0.0 1.1+ 961218 900 1.1- 0.5- 970301 118 1.2+ 0.2- 950902 691 1.2+ 0.8+ 961218 900 0.9- 0.5- 970301 118 0.8+ 0.3- 951022 691 1.3+ 0.7+ 961218 372 0.3- 0.3+ 970304 897 1.4+ 0.7+ 951022 691 0.6+ 1.2+ 961218 372 0.8- 1.1+ 970304 897 1.9+ 0.6+ 951115 691 1.2+ 0.2+ 961218 372 1.8- 0.5+ 970304 118 0.5+ 0.2+ 951115 691 1.4+ 0.6+ 961219 355 0.6- 0.0 970304 118 0.7+ 0.0 951115 691 1.4+ 0.0 961219 355 0.6- 0.1- 970323 118 0.6+ 0.5- 1996/ 961220 355 0.9- 0.5+ 970323 118 0.8+ 0.5- 960726 360 0.6- 0.3- 961220 355 0.6- 0.1- 970326 118 0.2- 0.5- 960726 360 1.1- 0.4- 961221 046 0.1- 0.1- 970326 118 1.3+ 0.4- 960824 360 0.0 0.4- 961221 046 0.4- 0.2- 970326 118 1.4+ 0.4- 960824 360 0.4- 0.3- 961221 046 0.1- 0.2- 970407 360 0.6+ 0.4- 960826 557 1.0- 0.2- 961227 118 0.7+ 0.3+ 970407 360 0.3+ 0.1- 960826 557 0.7- 0.5- 961227 595 0.2+ 1.1+ 970504 360 0.7+ 0.7- 960910 360 0.5- 0.2- 961227 595 0.2+ 0.7+ 970504 360 0.6+ 0.4- 960910 360 1.0- 0.3- 961228 046 0.4+ 0.3+ 970515 118 0.8+ 1.5- 961010 360 0.4- 0.3- 961228 046 0.6+ 0.2+ 970515 118 0.5+ 1.3- 961010 360 0.5- 0.4- 961228 046 0.6+ 0.2+ 970519 046 1.0- 1.0+ 961010 867 1.1- 0.7- 961230 897 0.4+ 0.9+ 970519 046 0.1- 0.7- 961010 867 0.7- 0.5- 961230 900 0.1+ 1.6+ 970519 046 0.8+ 0.0 961016 897 1.8- 0.1- 961230 897 0.4+ 0.6+ 1998/ 961016 897 1.7- 0.2- 961230 900 0.2- 0.8+ 980202 691 1.3- 0.2+ 961022 360 0.2- 0.5- 961230 355 0.2+ 0.5+ 980202 691 1.1- 0.4+ 961022 360 0.5- 0.4- 961230 355 0.2+ 0.5+ 980202 691 0.7- 0.2+ 961103 118 0.5- 0.2- 1997/ 980226 691 0.2+ 0.5+ 961104 118 0.5- 0.2- 970102 355 0.4+ 1.1+ 980226 691 0.1- 0.8+ 961104 557 0.1- 0.5- 970102 355 0.6+ 1.0+ 980226 691 0.4+ 0.5+ 961104 557 0.0 0.6- 970107 595 0.2+ 0.5+ 980226 691 0.4- 0.4- 961104 557 0.2- 0.3- 970107 605 0.8+ 1.1+ 980226 691 1.6- 1.6+ 961104 557 0.2- 0.3- 970107 595 0.3+ 0.5+ 980226 691 0.1- 0.7+ 961106 897 1.1- 0.1- 970107 605 0.9+ 1.2+ 980302 867 0.0 0.4+ 961106 897 1.5- 0.4- 970107 605 1.1+ 1.5+ 980302 867 0.0 0.7+ 961106 897 1.3- 0.5- 970111 360 0.6+ 0.1+ 980526 691 0.5- 0.7- 961106 360 0.0 0.4- 970111 360 0.6+ 0.1+ 980526 691 0.6- 0.8+ 961106 360 0.5- 0.2- 970113 900 1.0+ 0.8+ 980526 691 0.2- 0.3- 961111 801 0.8- 0.4- 970113 900 0.9+ 0.5+ 980623 691 0.8- 0.2+ 961111 801 0.6- 0.5- 970115 605 (2.3+ 1.3+) 980623 691 0.6- 0.1+ 961112 801 0.7- 0.1+ 970115 605 2.1+ 1.3+ 980623 691 0.9- 0.2+ 961112 801 0.4- 0.0 970124 118 1.2+ 0.1+ 980624 691 1.0- 0.4+ 961113 118 0.8- 0.3+ 970124 118 0.7+ 0.2- 980624 691 1.1- 0.5+ 961113 118 0.5- 0.3+ 970126 118 0.5+ 0.5- 980624 691 0.9- 0.4+ 961113 867 0.7- 0.1- 970126 118 0.7+ 0.1+ 980726 691 0.2+ 0.3+ 961113 867 0.4- 0.5+ 970126 118 0.1+ 0.2+ 980726 691 0.4+ 0.3+ 961113 867 0.4- 0.5+ 970128 900 1.7+ 0.7+ 980726 691 0.4+ 0.4+ 961113 360 0.1- 0.2- 970128 900 1.0+ 1.1+ 1999/ 961113 360 0.0 0.4- 970129 897 1.5+ 0.4+ 990523 693 2.1+ 0.2+ ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 1999 Nov. 3