OAA computing section circular NK 1151 142P/Ge-Wang
The following improved orbital elements, by S. Nakano, are from 48 observations 1988 to 1999. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.82 arc second. Epoch = 1999 July 1.0 TT T = 1999 June 21.47015 +/- 0.00931 (m.e.) TT Peri. = 177.38931 +/- 0.00323 Node = 177.14335 +/- 0.00084 (2000.0) Inc. = 12.17466 +/- 0.00040 q = 2.4968259 +/- 0.0000824 AU e = 0.5002361 +/- 0.0000160 a = 4.9960106 +/- 0.0000460 AU n' = 0.08826104 +/- 0.00000122 P = 11.167 +/- 0.0001544 years (+/- 0.06 day) T = 1988 May 23.98259 TT Epoch = 1988 June 8.0 TT Peri. = 176.16736 e = 0.5006494 Node = 180.53700 (2000.0) a = 5.0435905 AU Inc. = 11.66659 n'= 0.08701504 q = 2.5185198 AU P = 11.327 years The predicted orbit for the 2010 return is as follows: T = 2010 May 30.53697 TT Epoch = 2010 June 13.0 TT Peri. = 175.73271 e = 0.5000323 Node = 176.51818 (2000.0) a = 4.9763985 AU Inc. = 12.30610 n'= 0.08878331 q = 2.4880383 AU P = 11.101 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1988/ 990915 691 0.4+ 0.1+ 991009 704 0.1- 0.2- 881011 675 0.1- 0.1+ 990915 691 (2.2+ 0.2-) 991009 704 0.7- 0.4+ 881011 675 2.1+ 0.7- 990916 691 0.5+ 0.1+ 991009 704 0.5+ 0.0 881103 897 2.1- 0.9- 990916 691 0.6+ 0.5+ 991009 372 (0.9+ 5.4-) 881103 897 1.3- 0.9- 990916 691 0.4+ 0.2+ 991013 118 0.5+ 0.5- 881104 675 1.4+ 1.5- 991003 402 0.3+ 0.8- 991013 118 0.1- 1.8- 881104 327 0.5+ 0.5+ 991003 402 1.6- 0.9- 991013 118 0.5- 0.3- 881104 327 1.3- 0.8- 991003 402 0.1+ 0.5+ 991013 118 1.1+ 0.7- 881119 413 0.8+ 0.7+ 991003 402 1.5- 0.9- 991013 118 0.2+ 1.3- 881128 372 0.0 0.1+ 991004 703 1.3- 0.7+ 991013 118 0.5+ 0.8+ 881128 372 0.6+ 0.7+ 991004 703 0.9- 1.1+ 991018 867 0.3+ 0.6- 881128 372 0.4- 0.8+ 991004 703 0.1- 0.9- 991018 867 0.6- 0.2+ 881130 372 0.1+ 0.9+ 991004 360 0.2+ 0.3+ 991018 867 0.6+ 0.2- 881130 372 0.4- 1.1+ 991004 360 0.9+ 0.3- 991018 867 0.4- 0.0 881207 801 0.5+ 0.9- 991004 360 0.2+ 0.3+ 991021 402 0.1- 0.4+ 881213 801 (3.6+ 1.5+) 991008 897 1.3- 1.7+ 991021 402 0.4- 1.4+ 1999/ 991008 897 0.7- 1.1+ 991021 402 1.6+ 0.7+ 990915 691 0.2+ 0.3+ 991009 704 1.1+ 0.3- ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 2005 Jan. 19