OAA computing section circular NK 1615 P/1996 R2 (Lagerkvist)
The following improved orbital elements, by S. Nakano, are from 125 observations 1996 Aug. 12 to 1997 Jan. 12. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.62 arc second. See an orbit in NK 720 (= YC 2400). Epoch = 1997 Feb. 1.0 TT T = 1997 Jan. 19.22951 +/- 0.01491 (m.e.) TT Peri. = 334.05573 +/- 0.00473 Node = 40.23709 +/- 0.00176 (2000.0) Inc. = 2.60544 +/- 0.00006 q = 2.6096310 +/- 0.0000187 AU e = 0.3098858 +/- 0.0000249 a = 3.7814478 +/- 0.0000368 AU n' = 0.13403460 +/- 0.00000196 P = 7.353 +/- 0.0001073 years (+/- 0.04 day) The predicted orbit for the 2011 return is as follows: T = 2011 Oct. 17.05997 TT Epoch = 2011 Oct. 6.0 TT Peri. = 333.99060 e = 0.3106501 Node = 40.19675 (2000.0) a = 3.7889367 AU Inc. = 2.60382 n'= 0.13363741 q = 2.6119032 AU P = 7.375 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1996/ 960916 910 0.3- 0.3- 961005 367 0.0 0.5- 960812 566 0.1+ 0.6- 960916 910 0.2- 0.1+ 961005 900 0.3- 1.3- 960812 566 0.4+ 0.5+ 960916 910 0.5+ 0.6+ 961005 367 0.5+ 0.4- 960812 566 0.2+ 0.8- 960917 385 0.4+ 1.0+ 961005 900 (2.1+ 0.6+) 960819 566 0.9+ 0.1+ 960917 385 0.1+ 0.5- 961009 360 0.6+ 0.3- 960819 566 0.4+ 0.9+ 960917 385 0.2- 0.2+ 961009 360 0.3+ 0.3- 960819 566 0.8+ 0.0 960917 540 (2.6- 1.0-) 961009 360 0.3+ 0.2- 960910 809 (2.0+ 1.4+) 960917 540 0.0 0.5- 961010 372 0.3+ 0.2+ 960910 809 (2.8- 12.5+)Y 960917 540 (3.0- 0.4+) 961014 046 0.6+ 0.2+ 960911 809 1.0- 0.6+ 960918 372 0.2- 0.1- 961014 046 0.1+ 0.2- 960911 809 1.0- 0.7+ 960918 360 0.2+ 0.1+ 961014 046 0.2+ 0.0 960912 809 0.4- 0.2+ 960918 360 0.0 0.2+ 961015 372 0.1+ 0.7+ 960912 809 0.5- 0.3+ 960918 360 0.1+ 0.1+ 961016 801 1.3+ 1.6- 960912 809 (3.0+ 1.8+) 960919 381 0.8+ 0.2+ 961016 801 0.2- 1.0- 960912 046 0.6- 0.5- 960919 381 0.7+ 0.2+ 961016 360 0.1+ 0.3- 960912 587 0.2+ 0.6+ 960919 381 0.7+ 0.0 961016 360 0.0 0.4- 960912 587 0.4+ 0.2+ 960919 381 0.6+ 0.1+ 961016 897 0.8- 0.0 960912 587 0.3+ 0.1+ 960919 046 0.8+ 0.3- 961016 897 0.1- 0.0 960912 587 0.4- 0.6+ 960919 046 0.0 0.0 961020 897 0.5+ 0.1+ 960913 595 0.7- 0.5+ 960919 046 0.1+ 0.0 961020 897 (2.1+ 1.0-) 960913 966 1.6- 0.4+ 960920 691 0.3- 0.4- 961108 587 0.2+ 0.5- 960913 595 0.2- 0.2+ 960920 691 0.3- 0.3- 961108 587 0.4- 0.5- 960914 966 0.2- 0.9+ 960920 696 0.4+ 0.2- 961112 801 (3.1+ 0.7+) 960914 367 0.1- 0.8+ 960920 696 0.4+ 0.2- 961112 801 (1.9- 4.4-) 960914 367 0.1- 0.5+ 960921 696 0.2+ 0.3- 961113 809 0.6- 0.4- 960914 353 0.1- 0.2+ 960921 696 0.2+ 0.4- 961113 801 (2.2+ 0.6-) 960914 353 0.1- 0.2+ 960922 897 0.5- 0.4- 961114 801 (2.9+ 0.2-) 960914 353 0.3- 0.9+ 960922 897 0.4- 1.2- 961115 897 (2.2- 1.5-) 960914 422 0.5- 1.1+ 960922 897 0.3- 1.8- 961115 897 (3.5- 0.3-) 960914 422 1.0- 0.7+ 960922 372 0.4- 0.5- 961202 897 0.6+ 1.6+ 960914 422 0.6- 0.6+ 960930 118 0.1+ 0.2+ 961202 897 0.6- 0.7+ 960914 360 0.6- 0.1+ 960930 118 0.4+ 0.2- 961202 897 0.7+ 0.3+ 960914 360 0.2- 0.1+ 961001 372 0.7- 1.2+ 961203 360 0.4- 0.3- 960914 360 0.0 0.4+ 961001 900 1.2+ 1.1- 961203 360 0.5- 0.3- 960914 372 0.1- 0.0 961001 413 0.3+ 0.6- 961228 360 0.8- 0.0 960914 385 0.1- 0.4+ 961001 413 0.6+ 0.3- 961228 360 0.9- 0.5+ 960914 385 0.6- 0.4+ 961001 413 0.5+ 0.4- 961229 587 1.3+ 0.8+ 960914 385 0.8- 0.6+ 961002 587 0.8+ 0.2- 961230 867 0.9- 1.0+ 960914 372 1.6+ 0.1+ 961002 587 1.0+ 0.6- 961230 867 0.9- 1.2+ 960914 587 0.2- 0.2+ 961002 587 0.9+ 1.0- 961230 867 0.8- 0.9+ 960914 587 0.4- 0.6+ 961003 118 0.4+ 0.2- 1997/ 960915 353 1.2- 0.8+ 961003 118 0.7+ 0.4- 970110 587 (2.7+ 0.1+) 960915 353 (0.9- 2.6+) 961003 118 0.5+ 0.4- 970110 587 1.4+ 1.3+ 960915 353 0.4- 0.4- 961004 372 0.9- 0.5- 970111 587 1.2+ 0.4- 960915 900 0.9- 0.9+ 961004 372 0.0 0.2+ 970111 587 (3.4+ 0.2+) 960915 900 1.9- 0.4+ 961004 360 0.4+ 0.5- 970111 587 (2.4+ 0.2+) 960915 871 0.4+ 1.2- 961004 360 0.4+ 0.3- 970112 587 0.8- 0.5- 960915 871 0.3+ 1.0- 961004 360 0.7+ 0.5- 970112 587 0.8- 1.3- ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 2008 May 7