OAA computing section circular NK 672 107P=(4015) Wilson-Harrington
The following improved orbital elements, by S. Nakano, are from 129 observations 1949-1997. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.74 arc second. Epoch = 1996 Dec. 23.0 TT T = 1996 Dec. 6.33111 +/- 0.00002 (m.e.) TT Peri. = 90.88926 +/- 0.00022 Node = 270.96373 +/- 0.00022 (2000.0) Inc. = 2.78400 +/- 0.00001 q = 1.0003117 +/- 0.0000002 AU e = 0.6215680 +/- 0.0000001 a = 2.6433062 +/- 0.0000003 AU n' = 0.22934161 +/- 0.00000004 P = 4.298 +/- 0.0000007 years T = 1949 Oct. 8.07957 TT Epoch = 1949 Oct. 11.0 TT Peri. = 81.07229 e = 0.6201014 Node = 279.99541 (2000.0) a = 2.6426566 AU Inc. = 2.81023 n'= 0.22942619 q = 1.0039414 AU P = 4.296 years [ T = 1954 Jan. 26.64096 TT Epoch = 1954 Jan. 18.0 TT Peri. = 81.34630 e = 0.6197908 Node = 279.80278 (2000.0) a = 2.6440132 AU Inc. = 2.80903 n'= 0.22924963 q = 1.0052782 AU P = 4.299 years ] [ T = 1958 May 13.00104 TT Epoch = 1958 Apr. 27.0 TT Peri. = 81.87058 e = 0.6234538 Node = 279.26058 (2000.0) a = 2.6368683 AU Inc. = 2.80851 n'= 0.23018203 q = 0.9929028 AU P = 4.282 years ] [ T = 1962 Aug. 22.56272 TT Epoch = 1962 Aug. 4.0 TT Peri. = 81.82132 e = 0.6241785 Node = 279.26574 (2000.0) a = 2.6356836 AU Inc. = 2.80910 n'= 0.23033724 q = 0.9905465 AU P = 4.279 years ] [ T = 1966 Dec. 3.72223 TT Epoch = 1966 Dec. 21.0 TT Peri. = 81.95005 e = 0.6232931 Node = 279.16778 (2000.0) a = 2.6373641 AU Inc. = 2.80740 n'= 0.23011712 q = 0.9935133 AU P = 4.283 years ] [ T = 1971 Mar. 27.00058 TT Epoch = 1971 Mar. 30.0 TT Peri. = 89.07275 e = 0.6273344 Node = 272.76334 (2000.0) a = 2.6304213 AU Inc. = 2.78541 n'= 0.23102879 q = 0.9802676 AU P = 4.266 years ] [ T = 1975 July 1.53391 TT Epoch = 1975 July 7.0 TT Peri. = 89.13094 e = 0.6282439 Node = 272.70965 (2000.0) a = 2.6286818 AU Inc. = 2.78650 n'= 0.23125815 q = 0.9772284 AU P = 4.262 years ] T = 1979 Oct. 5.52778 TT Epoch = 1979 Oct. 14.0 TT Peri. = 89.16274 e = 0.6276297 Node = 272.65474 (2000.0) a = 2.6314579 AU Inc. = 2.78532 n'= 0.23089229 q = 0.9798768 AU P = 4.269 years [ T = 1984 Jan. 20.15289 TT Epoch = 1984 Jan. 21.0 TT Peri. = 90.78933 e = 0.6222727 Node = 271.17192 (2000.0) a = 2.6428783 AU Inc. = 2.78460 n'= 0.22939731 q = 0.9982873 AU P = 4.297 years ] T = 1988 May 7.92288 TT Epoch = 1988 Apr. 29.0 TT Peri. = 90.94188 e = 0.6228324 Node = 271.06418 (2000.0) a = 2.6414054 AU Inc. = 2.78572 n'= 0.22958922 q = 0.9962524 AU P = 4.293 years T = 1992 Aug. 21.73962 TT Epoch = 1992 Aug. 6.0 TT Peri. = 90.87063 e = 0.6227939 Node = 271.06418 (2000.0) a = 2.6414986 AU Inc. = 2.78595 n'= 0.22957706 q = 0.9963895 AU P = 4.293 years The predicted orbit for the 2001 return is as follows: T = 2001 Mar. 26.63407 TT Epoch = 2001 Apr. 1.0 TT Peri. = 91.09062 e = 0.6214188 Node = 270.82726 (2000.0) a = 2.6434264 AU Inc. = 2.78410 n'= 0.22932597 q = 1.0007516 AU P = 4.298 years The following residuals in seconds of arc are from the above orbital elements: 1949/ 791124 675 0.5+ 0.5+ 921128 801 0.4+ 0.3- 491119 675 (4.6- 1.7-) 791124 675 1.3+ 0.8+ 921128 801 0.4+ 0.2- 491119 675 (5.1- 2.5-) 791128 801 (0.2- 3.2-) 921129 801 0.7+ 0.4- 491119 675 (6.6- 2.4-) 791129 372 0.4+ 0.9- 921129 801 0.3+ 0.1- 491119 675 (5.5- 2.4-) 791129 372 0.2+ 0.4+ 921130 691 0.8- 0.2+ 491121 675 0.6- 1.2- 791207 688 (0.7+ 2.4-) 921130 691 0.7- 0.0 491121 675 (3.7- 0.6-) 791211 801 0.2- 1.6+ 921130 691 0.7- 0.1- 491121 675 1.6+ 1.5- 791211 043 1.3+ 1.4+ 921203 658 1.0- 0.3- 491121 675 0.8+ 1.2+ 791212 675 0.2- 1.2+ 921203 658 1.0- 0.2- 491122 675 (4.5- 1.2-) 791214 675 0.4+ 1.0+ 921203 658 1.0- 0.2- 491125 675 1.2- 0.4+ 791215 688 (1.2+ 2.5-) 921221 801 0.3+ 0.3- 491125 675 (6.2- 0.7-) 791216 879 1.3- 0.3- 921221 801 0.6+ 0.2- 1979/ 791216 879 1.3+ 0.5- 921224 801 0.3+ 0.4- 790615 413 0.3- 0.2+ 791217 688 1.1+ 1.9- 921224 801 0.5+ 0.4- 790615 413(12.7+ 1.5+) 791218 801 0.2- 0.2- 921230 711 (1.5+ 6.9+) 790811 413 0.0 1.5+ 791218 688 (1.2+ 3.1-) 1993/ 790811 413 (3.0+ 3.9-) 791218 043 1.1- 0.5+ 930120 711 0.4+ 0.2+ 790814 413 (1.3+ 2.4+) 791219 688 (0.6- 4.4-) 1996/ 790814 413 0.9+ 1.0- 1980/ 960423 381 0.6- 0.1+ 790815 413 0.5- 0.3+ 800114 801 0.9+ 1.8+ 960423 381 0.7- 0.1+ 790815 413 0.4- 1.9- 800211 801 1.4+ 1.0+ 960423 381 0.8- 0.1+ 791115 675 1.2- 0.7- 1988/ 960424 381 0.9- 0.4+ 791115 675 1.2- 1.1+ 881220 675 0.2+ 0.0 960424 381 1.0- 1.7+ 791115 675 0.6+ 0.3+ 881220 675 0.2+ 0.1+ 960425 381 0.6- 0.0 791116 675 0.1- 1.0+ 881220 675 0.2+ 0.1+ 960425 381 0.8- 0.2+ 791116 688 (1.4+ 2.4-) 881224 675 1.4- 1.0+ 960512 360 1.2- 0.7- 791116 675 0.5+ 0.7- 881224 675 0.1+ 0.1- 960512 360 1.0- 0.8- 791116 662 0.5+ 0.8+ 881224 675 0.4+ 0.1- 960512 360 0.4- 0.6- 791116 662 0.2- 1.1+ 1989/ 960516 691 0.5+ 0.2- 791116 675 (3.0+ 0.4+) 890206 413 0.6- 0.3+ 960516 691 0.6+ 0.2- 791116 801 1.2- 0.0 890206 413 0.8- 1.0- 960516 691 0.6+ 0.2- 791116 801 (3.9+ 1.9+) 1992/ 960522 360 0.8+ 0.2- 791117 801 0.9+ 0.6- 920611 711 0.4+ 0.2- 960522 360 1.2+ 0.1- 791117 801 0.7+ 0.5- 920629 801 0.4+ 0.4+ 960528 413 1.1+ 1.1- 791117 688 0.3- 1.6- 920629 801 0.5+ 0.2+ 960528 413 0.7+ 0.7- 791117 010 0.5- 0.6+ 920726 801 0.1- 0.2+ 960615 360 0.9+ 0.8- 791117 010 1.1+ 0.4+ 920726 801 0.6+ 0.5+ 960615 360 0.6+ 1.0- 791117 010 (3.4+ 4.5+) 920802 801 0.4+ 0.8+ 960618 691 0.9- 0.2- 791118 323 0.0 0.3- 920802 801 0.0 0.5+ 960618 691 0.6- 0.5- 791118 330 0.4- 0.1+ 920808 688 0.6- 0.5+ 960618 691 0.8- 0.9- 791118 330 0.8+ 0.3- 920808 688 0.7- 0.6+ 960626 696 0.0 0.5- 791118 494 0.2- 0.4+ 920824 801 0.5- 0.1- 960626 696 0.1+ 0.3- 791118 494 1.2- 1.2- 920824 801 (3.5+ 1.1+) 960626 696 0.6+ 0.6- 791118 494 0.5+ 0.9- 920829 372 (2.5+ 0.3+) 960711 421 0.7+ 1.0+ 791119 372 (2.1- 1.6+) 920925 801 0.5+ 0.0 960711 421 0.2- 1.2+ 791119 372 0.6- 0.1- 920925 801 0.2+ 0.1+ 960711 421 1.0- 1.4+ 791121 674 1.9- 0.4+ 920930 801 (2.1+ 0.9-) 960718 413 0.5+ 0.7- 791122 688 (0.2+ 2.4-) 920930 801 0.5+ 0.2+ 960718 413 0.4+ 0.6- 791122 688 0.1+ 0.7- 921017 711 0.3+ 0.1- 960817 568 0.3- 0.8- 791122 801 (4.1- 0.8+) 921023 801 0.2- 0.0 960817 568 1.3+ 0.7- 791123 484 (2.4- 3.2-) 921023 801 0.1- 0.4+ 1997/ 791123 484 1.5- 1.7- 921025 360 0.1+ 0.0 970112 360 0.4- 0.5- 791123 372 0.7+ 0.5- 921025 360 0.0 0.3+ 970112 360 0.4- 0.2- 791123 372 0.5+ 0.6- 921025 360 0.0 0.7+ 971230 568 0.3- 0.2+ 791123 494 (3.6- 1.4+) 921028 801 0.5- 0.3+ 791123 494 1.7+ 0.6+ 921028 801 0.4- 0.1- ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 1998 Apr. 29