OAA computing section circular NK 796 131P/Mueller 2
The following improved orbital elements, by S. Nakano, are from 150 observations 1990-1999. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.81 arc second. See an orbit on MPC 30244. Epoch = 1997 Nov. 8.0 TT T = 1997 Nov. 22.20793 +/- 0.00081 (m.e.) TT Peri. = 179.64069 +/- 0.00027 Node = 214.28476 +/- 0.00016 (2000.0) Inc. = 7.35549 +/- 0.00004 q = 2.4121419 +/- 0.0000025 AU e = 0.3438995 +/- 0.0000009 a = 3.6764822 +/- 0.0000017 AU n' = 0.13981551 +/- 0.00000010 P = 7.049 +/- 0.0000050 years T = 1990 Nov. 19.86634 TT Epoch = 1990 Nov. 5.0 TT Peri. = 171.01518 e = 0.4056782 Node = 218.85490 (2000.0) a = 3.5048209 AU Inc. = 7.07017 n'= 0.15021224 q = 2.0829915 AU P = 6.561 years The predicted orbit for the 2004 return is as follows: T = 2004 Dec. 17.58674 TT Epoch = 2004 Dec. 21.0 TT Peri. = 179.84792 e = 0.3422246 Node = 214.22907 (2000.0) a = 3.6852533 AU Inc. = 7.34901 n'= 0.13931666 q = 2.4240690 AU P = 7.075 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1990/ 901119 801 1.6+ 0.7- 970926 046 0.0 1.1+ 900915 675 0.0 0.6+ 901206 372 1.2- 0.6+ 970926 046 1.1+ 0.7+ 900915 675 (4.2+ 4.6+) 901206 372 0.2- 0.6- 970926 046 0.3+ 0.8+ 900916 675 0.2+ 1.6- 901214 801 0.6+ 0.2- 970926 046 0.1- 0.2+ 900916 675 0.2+ 2.0- 901214 801 0.6+ 0.6- 970926 046 0.2- 1.2+ 900917 675 0.7+ 0.6- 901220 801 1.2+ 0.6+ 970926 046 0.6+ 1.2+ 900917 675 (5.7+ 2.7+) 901220 801 1.0+ 0.4- 970927 046 0.6- 0.9+ 900917 675 1.0+ 1.9- 1991/ 970928 900 1.3+ 0.3+ 900917 675 0.4+ 1.9- 910209 801 1.8+ 0.5- 970928 900 0.6+ 0.5+ 900918 657 (0.4- 3.6-) 910209 801 0.7+ 0.2- 970929 360 0.3+ 0.9+ 900918 657 (3.3- 1.6-) 1997/ 970929 360 0.5+ 0.8+ 900918 675 (2.1- 2.6-) 970629 402 1.0+ 1.2+ 970930 402 0.1+ 0.7+ 900918 675 1.4+ 0.8+ 970629 402 0.7+ 0.9+ 970930 402 0.4+ 0.5+ 900918 675 (0.6+ 3.1-) 970629 402 0.6+ 0.6- 970930 402 0.0 0.5+ 900918 675 0.7+ 1.0- 970703 402 0.5- 0.3+ 971001 402 0.4+ 0.3- 900919 801 0.5- 0.2+ 970703 402 0.3- 0.2+ 971001 402 0.2- 0.4- 900919 801 0.3- 0.2+ 970703 402 1.8- 0.6+ 971001 402 0.2+ 0.5- 900919 372 0.3+ 0.5- Y 970705 372 0.1+ 0.3+ 971005 897 (0.7+ 2.5-) 900920 657 1.1+ 0.6+ 970705 360 0.8+ 0.9+ 971005 897 (0.8- 2.4-) 900920 657 0.5+ 2.0- 970705 360 0.2+ 0.6+ 971005 897 1.1- 1.2- 900920 675 0.4+ 2.1- 970705 360 0.1- 0.7+ 971009 691 0.6- 0.6+ 900920 675 0.7+ 1.2- 970706 402 0.3+ 0.7- 971009 691 0.3- 0.6+ 900920 897 (0.8+ 3.3-) 970706 402 0.4+ 0.0 971026 897 1.5- 0.3- 900920 897 (3.3- 3.9+) 970706 402 0.2+ 0.5- 971026 897 (0.3- 2.6-) 900920 373 0.4- 0.2+ 970714 696 0.4+ 1.0+ 971026 897 0.0 1.4- 900920 372 1.4- 0.4+ 970714 696 0.1+ 0.6+ 971026 627 0.4+ 0.9+ 900920 373 0.8- 1.6- 970714 696 0.0 0.9+ 971026 627 0.2- 1.1+ 900920 372 1.3- 1.6+ 970802 402 1.9+ 1.6+ 971026 627 0.2- 0.4+ 900921 801 0.4- 0.1+ 970802 402 2.0+ 0.3- 971027 360 1.0- 0.0 900921 801 0.4- 0.1+ 970810 046 0.1- 0.5- 971027 360 0.8- 0.1+ 900921 657 0.0 2.0- 970810 046 0.9- 0.5- 971030 704 (0.5+ 2.5-) 900921 657 0.1- 1.0+ 970810 046 0.4- 0.2- 971030 704 1.6- 0.5+ 900921 372 0.0 0.3+ 970810 118 0.3- 0.1- 971030 704 0.4+ 0.9- 900921 372 0.6+ 0.1- 970810 118 0.6+ 0.3+ 971030 704 (2.6- 1.8-) 900926 372 0.5- 0.1- 970811 402 0.1- 0.7- 971030 704 0.7- 1.7- 900927 657 1.1- 1.7- 970811 402 0.2- 0.3- 971105 360 0.7+ 0.5+ 900930 372 0.9+ 1.9+ 970811 402 0.7- 1.0- 971105 360 0.6+ 0.0 901015 801 1.2- 1.6+ 970825 867 0.0 0.4- 971106 897 (2.9+ 0.8+) 901015 046 (3.5+ 0.2+) 970825 867 0.6+ 0.7- 971106 897 (0.6- 2.6-) 901015 046 0.6- 1.1- 970825 867 0.4+ 0.6- 971109 402 0.3- 1.2+ 901016 801 0.1+ 0.2- 970826 360 0.1+ 0.2- 971109 402 1.0+ 1.2+ 901016 046 (1.0- 3.9-) 970826 360 0.4+ 1.2- 971109 402 0.2+ 0.7+ 901016 046 0.1+ 1.7- 970827 402 0.2- 1.3- 971204 360 0.4+ 0.7+ 901017 801 0.0 0.1- 970827 402 0.0 0.6- 971204 360 0.5+ 0.3+ 901017 675 0.5+ 1.3+ 970827 402 0.3+ 0.5- 971206 910 0.4- 0.6+ 901017 675 1.3- 0.8+ 970828 360 0.2+ 0.2- 971206 910 0.9- 0.5+ 901020 801 0.4+ 0.8- 970828 360 0.0 0.3+ 971206 910 0.9- 1.4+ 901020 801 0.4+ 0.3- 970901 118 0.2+ 0.8- 971231 691 0.8+ 1.0+ 901021 801 0.5+ 0.6+ 970901 118 0.4- 0.5- 971231 691 0.1- 0.6+ 901021 801 0.4+ 0.2+ 970902 118 0.0 0.3- 971231 691 1.0- 0.5+ 901021 409 1.2- 0.9+ 970910 360 0.5- 0.1- 1999/ 901026 409 0.9- 1.1+ 970910 360 0.1+ 0.4- 990113 568 0.8- 1.4- 901026 372 0.2- 0.3+ 970923 691 1.3- 2.2- 990113 568 0.1- 1.2- 901111 372 0.6+ 0.2- 970923 691 1.0- 1.0- 990114 568 (5.9- 0.1-) 901112 026 (0.7+ 2.3+) 970923 691 0.9- 1.0- 990115 693 1.0- 1.5- 901112 026 (4.1+ 1.0+) 970924 402 0.0 0.6+ 990115 693 1.0- 0.8- 901114 801 0.1- 0.6- 970924 402 0.3- 0.8+ 990214 693 0.7+ 1.1- 901114 801 0.0 0.6- 970924 402 0.2- 0.7+ 990214 693 0.3- 0.9- ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 2001 Apr. 28