OAA computing section circular NK 848 107P/Wilson-Harrington
The following improved orbital elements, by S. Nakano, are from 143 observations 1949 to 2002. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.71 arc second. See an orbit in NK 672. Epoch = 2001 Apr. 1.0 TT T = 2001 Mar. 26.63408 +/- 0.00002 (m.e.) TT Peri. = 91.09066 +/- 0.00020 Node = 270.82725 +/- 0.00020 (2000.0) Inc. = 2.78410 +/- 0.00001 q = 1.0007515 +/- 0.0000002 AU e = 0.6214188 +/- 0.0000001 a = 2.6434264 +/- 0.0000003 AU n' = 0.22932597 +/- 0.00000004 P = 4.298 +/- 0.0000007 years T = 1949 Oct. 8.07959 TT Epoch = 1949 Oct. 11.0 TT Peri. = 81.07232 e = 0.6201014 Node = 279.99539 (2000.0) a = 2.6426566 AU Inc. = 2.81023 n'= 0.22942618 q = 1.0039414 AU P = 4.296 years [ T = 1954 Jan. 26.64099 TT Epoch = 1954 Jan. 18.0 TT Peri. = 81.34634 e = 0.6197908 Node = 279.80276 (2000.0) a = 2.6440132 AU Inc. = 2.80903 n'= 0.22924963 q = 1.0052781 AU P = 4.299 years ] [ T = 1958 May 13.00108 TT Epoch = 1958 Apr. 27.0 TT Peri. = 81.87061 e = 0.6234538 Node = 279.26056 (2000.0) a = 2.6368683 AU Inc. = 2.80851 n'= 0.23018203 q = 0.9929028 AU P = 4.282 years ] [ T = 1962 Aug. 22.56277 TT Epoch = 1962 Aug. 4.0 TT Peri. = 81.82136 e = 0.6241785 Node = 279.26573 (2000.0) a = 2.6356837 AU Inc. = 2.80910 n'= 0.23033724 q = 0.9905465 AU P = 4.279 years ] [ T = 1966 Dec. 3.72230 TT Epoch = 1966 Dec. 21.0 TT Peri. = 81.95008 e = 0.6232931 Node = 279.16777 (2000.0) a = 2.6373641 AU Inc. = 2.80739 n'= 0.23011712 q = 0.9935133 AU P = 4.283 years ] [ T = 1971 Mar. 27.00064 TT Epoch = 1971 Mar. 30.0 TT Peri. = 89.07278 e = 0.6273344 Node = 272.76333 (2000.0) a = 2.6304213 AU Inc. = 2.78540 n'= 0.23102879 q = 0.9802675 AU P = 4.266 years ] [ T = 1975 July 1.53396 TT Epoch = 1975 July 7.0 TT Peri. = 89.13097 e = 0.6282439 Node = 272.70964 (2000.0) a = 2.6286818 AU Inc. = 2.78650 n'= 0.23125815 q = 0.9772284 AU P = 4.262 years ] T = 1979 Oct. 5.52781 TT Epoch = 1979 Oct. 14.0 TT Peri. = 89.16278 e = 0.6276297 Node = 272.65473 (2000.0) a = 2.6314579 AU Inc. = 2.78532 n'= 0.23089229 q = 0.9798767 AU P = 4.269 years [ T = 1984 Jan. 20.15292 TT Epoch = 1984 Jan. 21.0 TT Peri. = 90.78937 e = 0.6222727 Node = 271.17191 (2000.0) a = 2.6428783 AU Inc. = 2.78460 n'= 0.22939731 q = 0.9982872 AU P = 4.297 years ] T = 1988 May 7.92290 TT Epoch = 1988 Apr. 29.0 TT Peri. = 90.94192 e = 0.6228325 Node = 271.06417 (2000.0) a = 2.6414054 AU Inc. = 2.78572 n'= 0.22958922 q = 0.9962524 AU P = 4.293 years T = 1992 Aug. 21.73964 TT Epoch = 1992 Aug. 6.0 TT Peri. = 90.87067 e = 0.6227939 Node = 271.06416 (2000.0) a = 2.6414986 AU Inc. = 2.78595 n'= 0.22957706 q = 0.9963894 AU P = 4.293 years T = 1996 Dec. 6.33112 TT Epoch = 1996 Dec. 23.0 TT Peri. = 90.88930 e = 0.6215680 Node = 270.96372 (2000.0) a = 2.6433062 AU Inc. = 2.78400 n'= 0.22934161 q = 1.0003117 AU P = 4.298 years The predicted orbit for the 2005 return is as follows: T = 2005 July 10.72687 TT Epoch = 2005 July 9.0 TT Peri. = 91.28074 e = 0.6237140 Node = 270.57372 (2000.0) a = 2.6388065 AU Inc. = 2.78533 n'= 0.22992847 q = 0.9929461 AU P = 4.287 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 1949/ 791207 688 (0.7+ 2.4-) 921221 801 0.2+ 0.2- 491119 675 (4.6- 1.7-) 791211 801 0.2- 1.6+ 921221 801 0.4+ 0.2- 491119 675 (5.1- 2.5-) 791211 043 1.2+ 1.3+ 921224 801 0.2+ 0.3- 491119 675 (6.6- 2.4-) 791212 675 0.3- 1.2+ 921224 801 0.3+ 0.4- 491119 675 (5.5- 2.4-) 791214 675 0.3+ 1.0+ 921230 711 (1.3+ 6.9+) 491121 675 0.6- 1.2- 791215 688 (1.2+ 2.5-) 1993/ 491121 675 (3.7- 0.6-) 791216 879 1.4- 0.3- 930120 711 0.3+ 0.2+ 491121 675 1.6+ 1.5- 791216 879 1.2+ 0.5- 1996/ 491121 675 0.8+ 1.2+ 791217 688 1.0+ 1.9- 960423 381 0.7- 0.1+ 491122 675 (4.5- 1.2-) 791218 801 0.3- 0.2- 960423 381 0.8- 0.1+ 491125 675 1.3- 0.4+ 791218 688 (1.1+ 3.1-) 960423 381 0.9- 0.1+ 491125 675 (6.2- 0.7-) 791218 043 1.2- 0.4+ 960424 381 1.0- 0.4+ 1979/ 791219 688 (0.7- 4.4-) 960424 381 1.2- 1.7+ 790615 413 0.4- 0.2+ 1980/ 960425 381 0.7- 0.0 790615 413(12.7+ 1.5+) 800114 801 0.8+ 1.8+ 960425 381 0.9- 0.2+ 790811 413 0.0 1.5+ 800211 801 1.3+ 1.0+ 960512 360 1.3- 0.6- 790811 413 (3.0+ 3.8-) 1988/ 960512 360 1.2- 0.8- 790814 413 (1.2+ 2.4+) 881220 675 0.1+ 0.0 960512 360 0.6- 0.5- 790814 413 0.9+ 1.0- 881220 675 0.1+ 0.2+ 960516 695 0.4+ 0.2- 790815 413 0.5- 0.3+ 881220 675 0.1+ 0.2+ 960516 695 0.4+ 0.2- 790815 413 0.4- 1.9- 881224 675 1.5- 1.0+ 960516 695 0.4+ 0.2- 791115 675 1.1- 0.7- 881224 675 0.0 0.0 960522 360 0.7+ 0.2- 791115 675 1.2- 1.0+ 881224 675 0.3+ 0.1- 960522 360 1.1+ 0.1- 791115 675 0.7+ 0.2+ 1989/ 960528 413 1.0+ 1.0- 791116 675 0.0 1.0+ 890206 413 0.7- 0.3+ 960528 413 0.6+ 0.7- 791116 688 (1.5+ 2.4-) 890206 413 1.0- 1.0- 960615 360 0.8+ 0.8- 791116 675 0.5+ 0.7- 1992/ 960615 360 0.5+ 0.9- 791116 662 0.6+ 0.8+ 920611 711 0.3+ 0.2- 960618 691 0.1- 0.2- 791116 662 0.2- 1.1+ 920629 801 0.4+ 0.4+ 960618 691 0.3+ 0.5- 791116 675 (3.0+ 0.4+) 920629 801 0.4+ 0.2+ 960618 691 0.0 0.9- 791116 801 1.2- 0.0 920726 801 0.1- 0.2+ 960626 696 0.1- 0.5- 791116 801 (3.9+ 1.9+) 920726 801 0.6+ 0.5+ 960626 696 0.0 0.3- 791117 801 0.9+ 0.6- 920802 801 0.4+ 0.8+ 960626 696 0.5+ 0.6- 791117 801 0.7+ 0.5- 920802 801 0.0 0.5+ 960711 421 0.6+ 1.0+ 791117 688 0.3- 1.6- 920808 688 0.6- 0.5+ 960711 421 0.3- 1.2+ 791117 010 0.5- 0.6+ 920808 688 0.7- 0.6+ 960711 421 1.1- 1.5+ 791117 010 1.1+ 0.4+ 920824 801 0.5- 0.1- 960718 413 0.4+ 0.7- 791117 010 (3.4+ 4.5+) 920824 801 (3.5+ 1.1+) 960718 413 0.3+ 0.6- 791118 323 0.0 0.3- 920829 372 (2.5+ 0.3+) 960817 568 0.4- 0.7- 791118 330 0.4- 0.1+ 920925 801 0.4+ 0.0 960817 568 1.3+ 0.7- 791118 330 0.8+ 0.3- 920925 801 0.1+ 0.2+ 1997/ 791118 494 0.2- 0.4+ 920930 801 (2.1+ 0.9-) 970112 360 0.4- 0.5- 791118 494 1.2- 1.2- 920930 801 0.4+ 0.2+ 970112 360 0.4- 0.2- 791118 494 0.5+ 0.9- 921017 711 0.3+ 0.0 971230 568 0.4- 0.2+ 791119 372 (2.1- 1.6+) 921023 801 0.3- 0.0 2000/ 791119 372 0.6- 0.1- 921023 801 0.2- 0.5+ 000503 673 0.1- 0.7- 791121 674 1.9- 0.4+ 921025 360 0.0 0.1+ 000503 673 0.4- 0.7- 791122 688 (0.2+ 2.4-) 921025 360 0.1- 0.3+ 000503 673 0.0 0.4- 791122 688 0.1+ 0.7- 921025 360 0.1- 0.7+ 2002/ 791122 801 (4.2- 0.8+) 921028 801 0.6- 0.3+ 020119 691 0.3+ 0.5- 791123 484 (2.4- 3.2-) 921028 801 0.5- 0.0 020119 691 0.3+ 0.4- 791123 484 1.5- 1.8- 921128 801 0.3+ 0.3- 020119 691 0.4+ 0.6- 791123 372 0.7+ 0.5- 921128 801 0.3+ 0.2- 020119 867 0.6- 0.2- 791123 372 0.5+ 0.7- 921129 801 0.6+ 0.3- 020119 867 0.8+ 0.4- 791123 494 (3.6- 1.4+) 921129 801 0.2+ 0.1- 020119 867 0.6+ 0.7- 791123 494 1.7+ 0.6+ 921130 691 0.1+ 0.3+ 020211 704 0.2+ 0.1- 791124 675 0.5+ 0.5+ 921130 691 0.1+ 0.0 020211 704 1.0- 0.7+ 791124 675 1.2+ 0.7+ 921130 691 0.1+ 0.1- 020211 704 0.2- 1.2+ 791128 801 (0.3- 3.3-) 921203 658 1.2- 0.3- 020211 704 0.9+ 0.2- 791129 372 0.4+ 0.9- 921203 658 1.2- 0.1- 020211 704 0.7+ 0.0 791129 372 0.1+ 0.4+ 921203 658 1.1- 0.1- ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 2002 May 7