OAA computing section circular NK 1325 127P/Holt-Olmstead
The following improved orbital elements, by S. Nakano, are from 57 observations 1990 to 2003. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.71 arc second. See a previous orbit in NK 710. Epoch = 2003 June 10.0 TT T = 2003 June 12.46981 +/- 0.00212 (m.e.) TT Peri. = 6.49911 +/- 0.00069 Node = 14.00798 +/- 0.00007 (2000.0) Inc. = 14.39635 +/- 0.00004 q = 2.1590997 +/- 0.0000022 AU e = 0.3695898 +/- 0.0000007 a = 3.4249125 +/- 0.0000015 AU n' = 0.15549980 +/- 0.00000010 P = 6.338 +/- 0.0000042 years T = 1990 Oct. 4.51313 TT Epoch = 1990 Sept.26.0 TT Peri. = 2.59322 e = 0.3922258 Node = 15.32257 (2000.0) a = 3.3620528 AU Inc. = 14.89257 n'= 0.15988116 q = 2.0433690 AU P = 6.165 years T = 1997 Feb. 6.68899 TT Epoch = 1997 Feb. 1.0 TT Peri. = 6.26454 e = 0.3704641 Node = 14.06089 (2000.0) a = 3.4208079 AU Inc. = 14.40727 n'= 0.15577976 q = 2.1535213 AU P = 6.327 years The predicted orbit for the 2009 return is as follows: T = 2009 Oct. 21.37097 TT Epoch = 2009 Oct. 16.0 TT Peri. = 6.54010 e = 0.3624025 Node = 13.68457 (2000.0) a = 3.4437167 AU Inc. = 14.32149 n'= 0.15422790 q = 2.1957053 AU P = 6.391 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1990/ 900925 688 1.0+ 0.0 960616 568 0.1+ 0.3+ 900914 675 (2.2- 2.4-) 900926 372 0.5+ 0.7- 960616 568 0.1+ 0.3+ 900914 675 (1.7- 3.2-) 900930 372 0.0 0.4- 960919 696 0.4+ 0.2- 900916 675 0.1- 0.9+ 901015 095 (3.9- 3.3+) 960919 696 0.6+ 0.0 900916 675 1.8- 0.0 901015 095 (2.5+ 1.9-) 960919 691 0.2- 0.0 900918 675 1.0- 0.7- 901016 801 0.1- 0.0 960919 691 0.5- 0.5+ 900918 675 1.6- 1.3- 901016 801 0.0 0.2- 960919 691 0.3- 0.2+ 900919 801 0.9- 0.0 901020 801 1.0- 0.3- 960920 691 0.3- 0.5+ 900919 801 0.8- 0.2- 901020 801 0.4- 0.9- 960920 691 0.4- 0.8- 900920 657 (5.0- 6.5-) 901020 372 0.7+ 0.9- 960920 691 0.2- 0.5+ 900920 657 (4.6- 6.5-) 901023 372 1.6+ 0.6- 2003/ 900920 675 0.5+ 1.0+ 901023 372 1.1- 0.7+ 030905 204 (2.8+ 1.4+) 900920 675 0.4+ 0.2+ 901111 372 0.5- 0.3+ 030905 204 (0.7+ 3.7+) 900920 372 0.7- 0.3+ 901114 801 1.4+ 0.0 030922 461 0.1- 0.9+ 900920 372 1.2- 0.1+ 901114 801 1.3+ 0.0 030922 461 0.4+ 1.6+ 900921 801 0.6- 0.2- 901119 801 1.8+ 0.0 030922 461 0.6- 0.6+ 900921 801 0.3- 0.0 901119 801 1.6+ 0.0 030922 461 0.6+ 0.6+ 900921 372 0.8- 0.4+ 901206 372 0.1- 0.8- 031120 204 0.1- 0.3+ 900921 372 (2.0- 0.3+) 901206 372 (2.4+ 0.8-) 031120 204 0.1+ 0.7+ 900922 688 0.5+ 1.1+ 901207 372 (2.1- 1.5-) 031120 204 0.1+ 0.3- 900922 688 0.7+ 1.0+ 901214 801 1.6+ 0.2+ 031123 360 0.1- 0.2+ 900923 675 0.0 1.1- 901214 801 1.4+ 0.1+ 031123 360 0.8- 0.7+ 900923 675 0.0 0.5- 1996/ 031123 360 0.0 0.6+ 900925 688 1.2+ 0.0 960616 568 0.2+ 0.1+ ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 2006 Apr. 12