OAA computing section circular NK 720 P/1996 R2 (Lagerkvist)
The following improved orbital elements, by S. Nakano, are from 122 observations 1996 Sept. 11- 1997 Jan. 12. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.64 arc second. Epoch = 1997 Feb. 1.0 TT T = 1997 Jan. 19.30337 +/- 0.02206 (m.e.) TT Peri. = 334.07688 +/- 0.06498 Node = 40.23622 +/- 0.06485 (2000.0) Inc. = 2.60553 +/- 0.00159 q = 2.6096021 +/- 0.0002504 AU e = 0.3100739 +/- 0.0000481 a = 3.7824369 +/- 0.0001186 AU n' = 0.13398202 +/- 0.00000630 P = 7.356 +/- 0.0003460 years (+/- 0.13 day) The predicted orbit for the 2004 return is as follows: T = 2004 June 7.35685 TT Epoch = 2004 June 4.0 TT Peri. = 334.25017 e = 0.3084344 Node = 40.22304 (2000.0) a = 3.7928540 AU Inc. = 2.60224 n'= 0.13343043 q = 2.6230074 AU P = 7.387 years The following residuals in seconds of arc are from the above orbital elements: 1996/ 960917 385 0.2- 0.2+ 961005 900 1.8+ 0.6+ 960910 809 (2.5+ 1.5+) 960917 540 (2.5- 1.0-) 961009 360 0.2+ 0.3- 960911 809 0.6- 0.6+ 960917 540 0.0 0.5- 961009 360 0.0 0.3- 960911 809 0.7- 0.8+ 960917 540 (2.9- 0.4+) 961009 360 0.0 0.2- 960912 809 0.1- 0.2+ 960918 372 0.2- 0.1- 961010 372 0.0 0.2+ 960912 809 0.2- 0.4+ 960918 360 0.2+ 0.1+ 961014 046 0.3+ 0.2+ 960912 809 (3.3+ 1.9+) 960918 360 0.0 0.2+ 961014 046 0.2- 0.2- 960912 046 0.3- 0.4- 960918 360 0.2+ 0.1+ 961014 046 0.1- 0.0 960912 587 0.5+ 0.6+ 960919 381 0.8+ 0.1+ 961015 372 0.2- 0.7+ 960912 587 0.7+ 0.3+ 960919 381 0.6+ 0.1+ 961016 801 1.0+ 1.6- 960912 587 0.6+ 0.1+ 960919 381 0.6+ 0.0 961016 801 0.5- 1.0- 960912 587 0.1- 0.6+ 960919 381 0.6+ 0.1+ 961016 360 0.1- 0.3- 960913 595 0.5- 0.5+ 960919 046 0.7+ 0.3- 961016 360 0.2- 0.3- 960913 966 1.3- 0.4+ 960919 046 0.0 0.0 961016 897 1.1- 0.1+ 960913 595 0.0 0.2+ 960919 046 0.1+ 0.1- 961016 897 0.4- 0.0 960914 966 0.0 0.9+ 960920 691 0.3- 0.4- 961020 897 0.3+ 0.1+ 960914 367 0.1+ 0.8+ 960920 691 0.4- 0.4- 961020 897 1.9+ 0.9- 960914 367 0.1+ 0.5+ 960920 696 0.3+ 0.2- 961108 587 0.3+ 0.2- 960914 353 0.1+ 0.2+ 960920 696 0.3+ 0.2- 961108 587 0.3- 0.3- 960914 353 0.1+ 0.3+ 960921 696 0.1+ 0.4- 961112 801 (3.2+ 0.9+) 960914 353 0.1- 0.9+ 960921 696 0.2+ 0.4- 961112 801 (1.8- 4.2-) 960914 422 0.3- 1.1+ 960922 897 0.6- 0.4- 961113 809 0.5- 0.2- 960914 422 0.8- 0.7+ 960922 897 0.5- 1.3- 961113 801 (2.3+ 0.3-) 960914 422 0.4- 0.6+ 960922 897 0.4- 1.8- 961114 801 (3.1+ 0.0 ) 960914 360 0.4- 0.1+ 960922 372 0.5- 0.6- 961115 897 (2.0- 1.3-) 960914 360 0.0 0.1+ 960930 118 0.2- 0.2+ 961115 897 (3.3- 0.1-) 960914 360 0.2+ 0.4+ 960930 118 0.1+ 0.2- 961202 897 0.9+ 1.8+ 960914 372 0.1+ 0.1+ 961001 372 0.9- 1.1+ 961202 897 0.3- 1.0+ 960914 385 0.1+ 0.4+ 961001 900 0.9+ 1.1- 961202 897 1.0+ 0.6+ 960914 385 0.4- 0.4+ 961001 413 0.1+ 0.6- 961203 360 0.1- 0.1- 960914 385 0.6- 0.6+ 961001 413 0.3+ 0.4- 961203 360 0.2- 0.1- 960914 372 1.7+ 0.1+ 961001 413 0.2+ 0.4- 961228 360 0.8- 0.0 960914 587 0.0 0.2+ 961002 587 0.5+ 0.3- 961228 360 1.0- 0.5+ 960914 587 0.2- 0.6+ 961002 587 0.7+ 0.6- 961229 587 1.2+ 0.8+ 960915 353 1.1- 0.8+ 961002 587 0.6+ 1.0- 961230 867 1.0- 1.0+ 960915 353 (0.7- 2.6+) 961003 118 0.1+ 0.3- 961230 867 1.0- 1.1+ 960915 353 0.3- 0.4- 961003 118 0.4+ 0.5- 961230 867 0.9- 0.9+ 960915 900 0.7- 0.9+ 961003 118 0.3+ 0.4- 1997/ 960915 900 1.7- 0.4+ 961004 372 1.2- 0.6- 970110 587 (2.2+ 0.1-) 960915 871 0.5+ 1.2- 961004 372 0.3- 0.2+ 970110 587 1.0+ 1.1+ 960915 871 0.4+ 1.0- 961004 360 0.1+ 0.5- 970111 587 0.7+ 0.6- 960916 910 0.2- 0.3- 961004 360 0.1+ 0.3- 970111 587 (2.9+ 0.1-) 960916 910 0.1- 0.1+ 961004 360 0.4+ 0.5- 970111 587 1.9+ 0.0 960916 910 0.7+ 0.6+ 961005 367 0.3- 0.5- 970112 587 1.3- 0.7- 960917 385 0.5+ 1.0+ 961005 900 0.6- 1.3- 970112 587 1.3- 1.6- 960917 385 0.2+ 0.5- 961005 367 0.2+ 0.5- ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 1999 Nov. 4