OAA computing section circular NK 945 102P/Shoemaker 1
The following improved orbital elements, by S. Nakano, are from 72 observations 1984 to 1991. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 1.19 arc seconds. See orbits in NK 563 and NK 632. Epoch = 1991 Dec. 10.0 TT T = 1991 Dec. 18.21590 +/- 0.00212 (m.e.) TT Peri. = 18.76772 +/- 0.00067 Node = 339.95181 +/- 0.00013 (2000.0) Inc. = 26.24298 +/- 0.00009 q = 1.9857484 +/- 0.0000063 AU e = 0.4703483 +/- 0.0000016 a = 3.7491587 +/- 0.0000044 AU n' = 0.13576985 +/- 0.00000024 P = 7.259 +/- 0.0000127 years T = 1984 Sept.16.61709 TT Epoch = 1984 Sept.17.0 TT Peri. = 18.66684 e = 0.4714351 Node = 340.01369 (2000.0) a = 3.7399253 AU Inc. = 26.27771 n'= 0.13627296 q = 1.9767931 AU P = 7.233 years The predicted orbit for the 2006 return is as follows: See orbits in NK 563 and NK 632. They give T= 2006 June 7.32 and T= 2006 June 2.81 TT as the 2006 prediction, respectively. T = 2006 June 7.33129 TT Epoch = 2006 May 25.0 TT Peri. = 18.55913 e = 0.4722634 Node = 339.94445 (2000.0) a = 3.7398234 AU Inc. = 26.25310 n'= 0.13627853 q = 1.9736418 AU P = 7.232 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1984/ 841020 046 1.7- 0.2+ 841124 494 0.5- 0.4+ 840901 801(12.0+ 33.2-)Y 841020 046 1.9+ 1.3- 841125 979 0.9- 0.7+ 840922 801 1.0- 0.2- Y 841022 657 1.0+ 1.2- 841125 979 1.2- 1.2+ 840927 675 1.0- 0.2+ 841023 675 0.1- 0.0 841125 801 1.2- 0.1+ 840928 675 0.3- 0.3+ 841024 675 1.5+ 0.4+ 841126 114 (3.1- 1.5-) 841004 675 0.6- 0.8+ 841024 046 0.2- 0.6+ 841127 046 0.3- 0.8- 841004 801 (6.6- 2.3-)Y 841024 046 0.1+ 0.0 841127 046 0.1- 0.9+ 841005 657 1.3- 0.2+ 841024 494 1.0+ 0.3+ 841128 046 1.5- 0.5- 841005 657 1.6+ 1.2- 841025 675 0.8+ 0.7- 841128 046 0.5- 2.6- 841005 801 0.5- 2.4+ 841025 056 0.5+ 2.4+ 841214 056 (9.9+ 2.8+) 841005 675 0.9- 0.3- 841025 494 0.8- 1.4+ 841214 056 (5.1+ 1.6+) 841005 323 (6.3- 0.5-) 841025 993 (1.5- 4.0-) 841217 801 1.8- 0.6- 841006 801 (0.4+ 3.6-) 841025 056 0.6- 0.9+ 841220 801 2.3- 0.6- 841013 372 1.7- 2.8- 841025 984 (3.0- 0.6+) 841226 801 (1.8+ 5.3+) 841013 372 2.0- 2.8- 841026 675 0.4+ 1.5+ 1985/ 841014 688 0.2+ 1.1- 841027 675 0.5+ 0.5+ 850122 801 (1.9+ 5.6+) 841014 688 0.9- 0.4- 841028 046 0.6- 0.2+ 850124 801 0.4+ 0.8- 841014 380 (7.2+ 5.9-) 841028 046 0.0 0.1- 850219 801 (3.4+ 3.9+) 841014 026 1.1+ 0.7+ 841029 046 (5.6- 0.1+) 1991/ 841015 323 0.6- 1.0+ 841029 046 2.1- 0.8+ 910608 474 1.2- 0.4+ 841015 026 0.2+ 0.0 841031 056 (5.6- 0.9-) 910608 474 0.6- 0.1- 841016 801 0.2- 0.4+ 841113 046 0.9+ 0.2- 910610 474 1.2- 1.7- 841016 026 (3.8- 0.8+) 841113 046 1.0+ 0.7+ 910610 474 (3.7- 1.1-) 841016 017 0.8- 0.8- Y 841118 046 0.3+ 1.6+ 910831 413 0.0 1.7+ 841016 017 1.3+ 0.5- Y 841118 046 1.1+ 0.9+ 910901 372 1.3- 2.4+ 841016 017 (0.3- 3.5+)Y 841119 801 0.0 0.3- 910901 372 1.6+ 0.7- 841017 801 1.1- 0.1- 841121 675 1.0+ 0.2+ 911105 801 3.3+ 3.1- 841017 657 0.8+ 0.2+ 841122 114 (4.4- 4.3-) 911105 801 3.0+ 2.3- 841017 026 1.5+ 1.5- 841123 114 (0.3- 2.9-) 1992/ 841018 046 1.5- 0.5+ 841123 046 (4.3- 1.3+) 921202 691(56.5- 40.0+) 841018 046 0.6+ 0.8- 841123 046 1.2+ 1.0+ 921202 691(55.8- 38.9+) 841019 707 0.2+ 0.2+ 841124 675 1.6+ 1.6+ 921202 691(55.5- 38.6+) 841019 657 2.0+ 0.6+ 841124 046 2.1+ 0.7+ 841020 657 0.0 2.2- 841124 046 1.6+ 0.4+ ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 2003 Apr. 21