OAA computing section circular NK 714 66P/du Toit
The following improved orbital elements, by S. Nakano, are from 34 observations 1944-1974. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 1.45 arc seconds. See a previous version in NK 326 (1978). Epoch = 1974 Mar. 14.0 TT T = 1974 Apr. 1.49595 +/- 0.00059 (m.e.) TT Peri. = 257.21641 +/- 0.00061 Node = 22.82949 +/- 0.00033 (2000.0) Inc. = 18.70852 +/- 0.00012 q = 1.2940340 +/- 0.0000038 AU e = 0.7869410 +/- 0.0000006 a = 6.0735941 +/- 0.0000041 AU n' = 0.06584691 +/- 0.00000007 P = 14.968 +/- 0.0000153 years T = 1944 June 17.49469 TT Epoch = 1944 May 30.0 TT Peri. = 257.02572 e = 0.7879836 Node = 23.14691 (2000.0) a = 6.0228263 AU Inc. = 18.75016 n'= 0.06668122 q = 1.2769379 AU P = 14.781 years [ T = 1959 Apr. 7.97245 TT Epoch = 1959 Apr. 22.0 TT Peri. = 257.00978 e = 0.7872252 Node = 22.85822 (2000.0) a = 6.0723286 AU Inc. = 18.71743 n'= 0.06586750 q = 1.2920383 AU P = 14.963 years ] The predicted orbit for the 2003 return is as follows: T = 2003 Aug. 28.23204 TT Epoch = 2003 Aug. 29.0 TT Peri. = 257.25235 e = 0.7876827 Node = 22.21383 (2000.0) a = 6.0017673 AU Inc. = 18.70097 n'= 0.06703249 q = 1.2742792 AU P = 14.703 years The following residuals in seconds of arc are from the above orbital elements: 1944/ 440628 822 1.3- 2.0+ 440819 822 (1.5- 5.1-) 440523 078(15.6- 4.7+) 440628 822 0.2+ 0.7- 440825 078 (5.2+ 3.4-) 440528 078 (6.0- 7.8+) 440712 078 0.5- 2.6- 440919 822 1.5+ 1.1+ 440529 822 0.0 2.0- 440712 078 1.3- 2.9+ 440921 822 0.5- 3.4+ 440529 822 2.1+ 1.3- 440714 822 3.0- 0.6- 440926 754 (1.3+ 4.5+) 440530 822 0.1+ 0.4- 440714 822 0.3+ 0.7- 440926 754 (4.3+ 0.8-) 440530 822 1.0+ 0.8- 440717 078 1.4+ 0.9+ 441019 711 1.2+ 0.2- 440612 822 0.8+ 0.0 440717 078 0.6- 1.4- 441020 711 0.5+ 0.6- 440612 822 1.8+ 0.8- 440727 078 0.1+ 0.6+ 441020 662 0.2- 1.3+ 440614 822 0.9+ 1.3+ 440728 822 0.3+ 1.8+ 441020 662 (0.4- 6.2-) 440614 822 2.2- 1.4+ 440728 822 (1.2- 16.4+) 441021 711 2.2+ 0.3- 440618 822 1.4- 0.1+ 440812 078(58.0+ 2.5+) 441022 711 1.8+ 2.8- 440618 822 0.7- 1.5+ 440816 822 0.6- 1.1- 1974/ 440627 822 0.6- 0.4- 440816 822 0.0 2.0- 740322 805 2.1- 0.6- 440627 822 0.2+ 1.7- 440819 822 0.8- 2.7- 740422 805 0.5+ 3.6+ ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 2000 May 13