OAA computing section circular NK 669 113P/Spitaler
The following improved orbital elements, by S. Nakano, are from 105 observations 1890-1994. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 1.54 arc seconds. Epoch = 1994 Feb. 17.0 TT T = 1994 Jan. 28.25348 +/- 0.00282 (m.e.) TT Peri. = 50.19383 +/- 0.00119 Node = 14.52660 +/- 0.00073 (2000.0) Inc. = 5.77691 +/- 0.00014 q = 2.1333508 +/- 0.0000083 AU e = 0.4222537 +/- 0.0000016 a = 3.6925390 +/- 0.0000048 AU n' = 0.13890454 +/- 0.00000027 P = 7.096 +/- 0.0000137 years T = 1890 Oct. 27.47842 TT Epoch = 1890 Nov. 9.0 TT Peri. = 13.61741 e = 0.4695577 Node = 46.52201 (2000.0) a = 3.4237276 AU Inc. = 12.81375 n'= 0.15558054 q = 1.8160901 AU P = 6.335 years [ T = 1897 Mar. 1.89540 TT Epoch = 1897 Mar. 17.0 TT Peri. = 13.79678 e = 0.4698845 Node = 46.46130 (2000.0) a = 3.4235613 AU Inc. = 12.81247 n'= 0.15559187 q = 1.8148829 AU P = 6.335 years ] [ T = 1903 Dec. 15.83988 TT Epoch = 1904 Jan. 1.0 TT Peri. = 21.90612 e = 0.4246354 Node = 42.13324 (2000.0) a = 3.6031104 AU Inc. = 10.83532 n'= 0.14410788 q = 2.0731023 AU P = 6.839 years ] [ T = 1910 Oct. 24.32343 TT Epoch = 1910 Oct. 16.0 TT Peri. = 22.04318 e = 0.4234361 Node = 42.08828 (2000.0) a = 3.6105468 AU Inc. = 10.82340 n'= 0.14366289 q = 2.0817111 AU P = 6.861 years ] [ T = 1917 Aug. 30.10371 TT Epoch = 1917 Sept. 9.0 TT Peri. = 21.84323 e = 0.4235996 Node = 42.09812 (2000.0) a = 3.6128194 AU Inc. = 10.82053 n'= 0.14352736 q = 2.0824307 AU P = 6.867 years ] [ T = 1924 July 8.81890 TT Epoch = 1924 June 24.0 TT Peri. = 21.65881 e = 0.4222849 Node = 42.08328 (2000.0) a = 3.6153717 AU Inc. = 10.81231 n'= 0.14337540 q = 2.0886549 AU P = 6.874 years ] [ T = 1931 May 21.71852 TT Epoch = 1931 May 19.0 TT Peri. = 21.80044 e = 0.4238357 Node = 42.03342 (2000.0) a = 3.6062404 AU Inc. = 10.81653 n'= 0.14392030 q = 2.0777870 AU P = 6.848 years ] [ T = 1938 Mar. 11.39283 TT Epoch = 1938 Mar. 3.0 TT Peri. = 22.09074 e = 0.4328645 Node = 41.65688 (2000.0) a = 3.5755352 AU Inc. = 10.83180 n'= 0.14577817 q = 2.0278130 AU P = 6.761 years ] [ T = 1944 Dec. 18.56534 TT Epoch = 1944 Dec. 16.0 TT Peri. = 22.31281 e = 0.4330110 Node = 41.58681 (2000.0) a = 3.5760117 AU Inc. = 10.82743 n'= 0.14574903 q = 2.0275594 AU P = 6.762 years ] [ T = 1951 Nov. 16.09424 TT Epoch = 1951 Nov. 10.0 TT Peri. = 23.83179 e = 0.4126786 Node = 40.60676 (2000.0) a = 3.6558247 AU Inc. = 10.54388 n'= 0.14100225 q = 2.1471441 AU P = 6.990 years ] [ T = 1958 Nov. 18.01814 TT Epoch = 1958 Nov. 13.0 TT Peri. = 23.97269 e = 0.4112261 Node = 40.56919 (2000.0) a = 3.6638697 AU Inc. = 10.52843 n'= 0.14053809 q = 2.1571909 AU P = 7.013 years ] [ T = 1965 Nov. 15.61966 TT Epoch = 1965 Nov. 16.0 TT Peri. = 23.85054 e = 0.4127092 Node = 40.57102 (2000.0) a = 3.6583181 AU Inc. = 10.53518 n'= 0.14085811 q = 2.1484967 AU P = 6.997 years ] [ T = 1972 Nov. 6.02836 TT Epoch = 1972 Nov. 19.0 TT Peri. = 23.59951 e = 0.4134868 Node = 40.51881 (2000.0) a = 3.6543655 AU Inc. = 10.53515 n'= 0.14108671 q = 2.1433335 AU P = 6.986 years ] [ T = 1979 Nov. 1.98800 TT Epoch = 1979 Oct. 14.0 TT Peri. = 23.77118 e = 0.4142592 Node = 40.45092 (2000.0) a = 3.6486150 AU Inc. = 10.53762 n'= 0.14142039 q = 2.1371425 AU P = 6.969 years ] [ T = 1986 Dec. 26.55404 TT Epoch = 1987 Jan. 5.0 TT Peri. = 50.03564 e = 0.4239533 Node = 14.59827 (2000.0) a = 3.6838257 AU Inc. = 5.78484 n'= 0.13939766 q = 2.1220557 AU P = 7.070 years ] The predicted orbit for the 2001 return is as follows: T = 2001 Feb. 25.87724 TT Epoch = 2001 Feb. 20.0 TT Peri. = 50.06245 e = 0.4235432 Node = 14.52525 (2000.0) a = 3.6902635 AU Inc. = 5.77664 n'= 0.13903304 q = 2.1272774 AU P = 7.089 years The following residuals in seconds of arc are from the above orbital elements: 1890/ 931019 675 2.0+ 0.4- 931118 360 0.4+ 0.2+ 901117 045 (4.6+ 8.2+) 931019 675 2.1- 1.3+ 931122 786 0.6+ 0.0 901117 045 1.9+ 3.1+ 931021 675 0.8- 1.5+ 931122 786 0.5+ 0.2- 901204 045 (3.2- 6.3-) 931021 675 (2.4- 1.0+) 931122 786 0.3+ 0.9- 901204 045 1.1- 4.2- 931024 691 2.0- 0.6+ 931123 786 0.5- 0.6- 901204 045 (3.7- 7.2+) 931024 691 2.1- 0.7+ 931123 786 0.4- 1.0- 901206 035 (8.0- 2.3-) 931024 691 1.9- 0.1+ 931123 786 0.4- 0.7- 901206 008(14.3- 0.5+) 931026 693 0.8- 0.2+ 931208 360 0.3- 0.3+ 901207 020 0.5- 1.8- 931026 693 0.7- 0.1+ 931208 360 0.8+ 0.4+ 901207 662 3.0- 2.5+ 931027 693 1.6- 0.2- 931209 385 1.0+ 0.3- 901207 601 (7.5+ 6.3-) 931027 693 1.7- 0.0 931209 385 2.1+ 0.3- 901207 045 (4.0+ 8.0-) 931103 385 1.1- 1.1- 931209 385 1.2+ 0.7- 901207 045 0.3+ 3.2- 931103 385 2.1- 0.8- 931212 360 0.5- 0.5- 901208 662 2.1+ 2.1- 931103 385 0.8- 0.9- 931212 360 0.0 0.1- 901208 522 1.1+ 4.7- 931105 385 0.2- 0.6- 931212 360 0.0 0.1- 901208 045 (1.5- 6.0+) 931105 385 0.2+ 0.5- 931212 372 0.6- 0.6- 901209 662 4.0- 4.0- 931109 372 0.3- 0.2+ 931219 691 0.5+ 0.1+ 901209 045 0.1+ 3.9+ 931109 372 (2.3- 0.3+) 931219 691 0.1+ 0.2+ 901210 662 2.7+ 1.2- 931110 540 1.0- 1.0+ 931219 691 1.8+ 0.4+ 901210 020 4.8- 1.9- 931110 540 1.2+ 0.8+ 1994/ 901211 045 1.3- 3.0+ 931111 801 1.3+ 0.4+ 940101 372 1.0+ 1.1- 901211 020 3.2- 0.7- 931111 801 0.7+ 0.5+ 940105 691 1.3- 0.4+ 901212 662(60.8+ 47.6-) 931111 477 0.6- 0.3- 940105 691 0.4- 0.3+ 901212 045 (0.3+ 6.4-) 931113 801 0.8+ 0.3+ 940105 691 0.3- 0.3+ 901212 522 2.8+ 1.4- 931113 801 0.3+ 0.0 940109 360 0.6+ 0.7+ 901213 045 (1.1- 5.2-) 931113 540 1.6+ 1.1- 940109 360 0.1+ 0.1- 901213 522 2.0+ 3.1- 931113 540 0.7+ 0.7- 940113 104(10.0+ 3.0+) 901215 662 1.5+ 1.4- 931113 540 0.0 0.4+ 940113 104 (3.1- 1.5-) 901229 045 2.2- 3.4+ 931113 540 1.7+ 0.9- 940118 691 0.5+ 0.5+ 901230 522 3.5+ 1.5- 931114 540 1.4+ 0.6- 940118 691 0.3+ 0.5+ 901231 045 (5.7+ 4.0+) 931114 540 0.4- 0.2- 940118 691 0.2- 0.4+ 1891/ 931114 897 0.3- 0.6- 940130 587 (3.5+ 2.0+) 910101 045 (0.8- 25.6+) 931114 897 1.8+ 0.6+ 940130 587 1.7+ 1.3+ 910103 522(14.6+ 7.1-) 931115 385 1.3+ 0.2- 940130 587 1.1- 0.3+ 910106 045 0.0 4.1- 931115 385 0.6+ 0.9- 940211 691 1.8- 0.1- 910108 662 (8.1+ 6.4+) 931115 385 1.8+ 0.2+ 940211 691 0.9- 0.1+ 910108 662 (8.1+ 2.0-) 931117 801 1.4+ 0.4- 940211 691 1.4- 0.1+ 910109 662 (7.0+ 9.4-) 931117 801 0.5+ 0.1- 940318 691 0.6- 0.4+ 910111 662 2.5- 3.3+ 931117 691 1.0- 0.2+ 940318 691 0.2+ 0.6+ 910112 662 4.6+ 4.8+ 931117 691 2.2- 0.6+ 940318 691 0.3- 0.2+ 910113 662 0.4- 3.6+ 931117 691 0.4- 0.0 940405 691 0.2+ 0.3+ 910127 045 4.8+ 0.6- 931118 372 0.1- 0.2- 940405 691 0.0 0.7+ 910204 045 (0.8- 14.4+) 931118 372 0.3- 1.7+ 940405 691 0.6+ 0.7+ 1993/ 931118 360 1.0+ 0.6+ 931009 374 (8.6- 1.9-)Y 931118 360 0.7+ 0.7+ ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 1998 Apr. 29