Nakano Note (Nakano wa Kangaeru noda) NK 632 102P/Shoemaker 1

The following improved orbital elements, by S. Nakano, are from 66 observations 1984 to 1992, 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 +/- 0.98 arc second. See the previous orbit in NK 461, NK 511 and NK 563. Epoch = 1991 Dec. 10.0 TT T = 1991 Dec. 18.17631 +/- 0.00625 (m.e.) TT Peri. = 18.75396 +/- 0.00237 Node = 339.95073 +/- 0.00017 (2000.0) Inc. = 26.24249 +/- 0.00008 q = 1.9857474 +/- 0.0000174 AU e = 0.4701977 +/- 0.0000288 a = 3.7480916 +/- 0.0000551 AU n' = 0.13582783 +/- 0.00000300 P = 7.256 +/- 0.0001601 years A1 = +13.326 +/- 0.799 A2 = -3.65391 +/- 0.62068 (+/- 0.06 day) T = 1984 Sept.16.66491 TT Epoch = 1984 Sept.17.0 TT Peri. = 18.68864 e = 0.4714538 Node = 340.01261 (2000.0) a = 3.7401804 AU Inc. = 26.27722 n'= 0.13625902 q = 1.9768581 AU P = 7.233 years The predicted orbit for the 1999 return is as follows: Note the delta-T correction was +1.44 days for 1999 return. See the later orbits in NK 945, NK 1150, NK 1356, NK 1942 and YC 2455 (= HICQ 2006, T. Kobayashi). T = 1999 Mar. 15.42446 TT Epoch = 1999 Mar. 3.0 TT Peri. = 18.62838 e = 0.4711928 Node = 339.97328 (2000.0) a = 3.7430782 AU Inc. = 26.26049 n'= 0.13610081 q = 1.9793667 AU P = 7.242 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 840901 801(14.2+ 34.7-) 841020 657 (0.3- 2.3-) 841124 675 2.2+ 1.5+ 840922 801 0.7- 0.3- 841020 046 1.8- 0.1+ 841124 046 (2.6+ 0.7+) 840927 675 1.4- 0.2- 841020 046 1.8+ 1.5- 841124 046 2.1+ 0.4+ 840928 675 0.7- 0.1+ 841022 657 0.9+ 1.3- 841124 494 0.1+ 0.3+ 841004 675 1.1- 0.5+ 841023 675 0.1- 0.2- 841125 979 0.4- 0.7+ 841004 801 (7.2- 2.2-) 841024 675 1.3+ 0.2+ 841125 979 0.7- 1.2+ 841005 657 1.9- 0.1- 841024 046 0.2- 0.4+ 841125 801 0.6- 0.1+ 841005 657 1.1+ 1.4- 841024 046 0.1+ 0.0 841126 114 (2.5- 1.5-) 841005 801 1.0- 2.1+ 841024 494 0.9+ 0.2+ 841127 046 0.3+ 0.8- 841005 675 1.4- 0.5- 841025 675 0.8+ 0.9- 841127 046 0.4+ 0.8+ 841005 323 (6.8- 0.7-) 841025 056 (0.5+ 2.3+) 841128 046 0.9- 0.5- 841006 801 (0.1- 3.8-) 841025 494 0.8- 1.2+ 841128 046 (0.0 2.7-) 841013 372 (2.1- 3.0-) 841025 993 (1.5- 4.2-) 841214 056(10.2+ 2.7+) 841013 372 (2.4- 3.0-) 841025 056 0.7- 0.8+ 841214 056 (5.4+ 1.5+) 841014 688 0.1- 1.3- 841025 984 (3.0- 0.4+) 841217 801 1.5- 0.7- 841014 688 1.2- 0.6- 841026 675 0.5+ 1.3+ 841220 801 2.2- 0.7- 841014 380 (6.8+ 6.0-) 841027 675 0.6+ 0.4+ 841226 801 (1.7+ 5.2+) 841014 026 0.8+ 0.5+ 841028 046 0.5- 0.1+ 850122 801 (0.9+ 5.4+) 841015 323 0.9- 0.8+ 841028 046 0.1+ 0.2- 850124 801 0.6- 1.0- 841015 026 0.1- 0.1- 841029 046 (5.5- 0.0 ) 850219 801 (1.5+ 3.9+) 841016 801 0.5- 0.2+ 841029 046 2.0- 0.7+ 910608 474 0.4- 1.7+ 841016 026 (4.1- 0.6+) 841031 056 (5.4- 0.9-) 910608 474 0.1+ 1.2+ 841016 017 0.6- 1.0- 841113 046 1.4+ 0.3- 910610 474 0.6- 0.3- 841016 017 1.4+ 0.7- 841113 046 1.5+ 0.6+ 910610 474 (3.1- 0.2+) 841016 017 (0.3- 3.3+) 841118 046 0.8+ 1.5+ 910831 413 1.3+ 1.8- 841017 801 1.4- 0.2- 841118 046 1.6+ 0.8+ 910901 372 0.1- 1.2- 841017 657 0.6+ 0.1+ 841119 801 0.5+ 0.3- 910901 372 (2.8+ 4.3-) 841017 026 1.3+ 1.6- 841121 675 1.6+ 0.2+ 911105 801 (1.4+ 10.1-) 841018 046 1.7- 0.3+ 841122 114 (3.8- 4.4-) 911105 801 (1.1+ 9.3-) 841018 046 0.4+ 0.9- 841123 114 (0.2+ 3.0-) 921202 691 0.6- 1.1+ 841019 707 0.0 0.0 841123 046 (3.8- 1.2+) 921202 691 0.1+ 0.1- 841019 657 1.8+ 0.5+ 841123 046 1.8+ 0.9+ 921202 691 0.4+ 0.4- ( ) -------- Rejected Obs.

Associate of Central Bureau for Astronomical Telegrams Republished Syuichi Nakano 2011 Dec. 21

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