OAA computing section circular NK 932 83P/Russell 1
The following improved orbital elements, by S. Nakano, are from 20 observations 1979 to 1985. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 1.30 arc seconds. Epoch = 1985 June 24.0 TT T = 1985 July 5.22924 +/- 0.00117 (m.e.) TT Peri. = 0.37626 +/- 0.00060 Node = 230.84193 +/- 0.00023 (2000.0) Inc. = 22.65948 +/- 0.00013 q = 1.6115437 +/- 0.0000058 AU e = 0.5172094 +/- 0.0000017 a = 3.3379763 +/- 0.0000050 AU n' = 0.16161408 +/- 0.00000036 P = 6.099 +/- 0.0000137 years T = 1979 May 26.97599 TT Epoch = 1979 May 7.0 TT Peri. = 0.21323 e = 0.5168275 Node = 230.88804 (2000.0) a = 3.3392748 AU Inc. = 22.65003 n'= 0.16151982 q = 1.6134459 AU P = 6.102 years The predicted orbit for the 2006 return is as follows: T = 2006 Apr. 7.74448 TT Epoch = 2006 Apr. 15.0 TT Peri. = 333.77707 e = 0.4389532 Node = 226.41973 (2000.0) a = 3.8709525 AU Inc. = 17.76659 n'= 0.12941282 q = 2.1717853 AU P = 7.616 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1979/ 790718 413 0.3- 1.4- 850410 675 0.4- 0.0 790227 413 1.3+ 3.1+ 790723 413 3.1- 1.4+ 850613 691 0.0 0.9- 790616 413 0.7- 2.5+ 790811 413 0.1+ 0.7- 850613 691 0.8+ 0.8- 790624 413 0.3- 1.8- 790814 801 1.9+ 2.4+ 850613 691 0.8+ 0.7- 790628 801 (6.4+ 5.3+) 1985/ 850617 691 0.1- 1.0- 790629 323 1.1- 1.7+ 850409 675 1.0- 0.0 850617 691 0.7+ 0.8- 790715 413 0.8+ 0.7+ 850409 675 1.3- 0.3+ 850617 691 0.9+ 1.4- 790716 413 1.7+ 2.0- 850410 675 0.1- 0.1- ( ) -------- Rejected Obs.
Director, Computing Section Recomputed version for NK 500 Syuichi Nakano 2003 Apr. 14