OAA computing section circular NK 1021 P/2001 T4 (NEAT)
The following improved orbital elements, by S. Nakano, are from 89 observations 2001 Aug. 27 to 2003 Nov. 23. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.56 arc second. See an orbit in NK 899 (= HICQ 2003). Epoch = 2002 May 6.0 TT T = 2002 May 20.65609 +/- 0.02797 (m.e.) TT Peri. = 321.85499 +/- 0.00130 Node = 64.50037 +/- 0.00018 (2000.0) Inc. = 15.36281 +/- 0.00006 q = 8.5642155 +/- 0.0000455 AU e = 0.3844014 +/- 0.0000254 a = 13.9120133 +/- 0.0000417 AU n' = 0.01899412 +/- 0.00000009 P = 51.890 +/- 0.0002337 years (+/- 0.09 day) The predicted orbit for the 2053 return is as follows: T = 2053 Nov. 26.18860 TT Epoch = 2053 Dec. 4.0 TT Peri. = 322.07900 e = 0.3798295 Node = 64.29579 (2000.0) a = 13.7839463 AU Inc. = 15.37287 n'= 0.01925944 q = 8.5483975 AU P = 51.175 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2001/ 011029 568 0.5- 0.1- 021013 204 0.3+ 0.8+ 010827 699 (0.9+ 5.5-) 011114 402 0.8- 0.6+ 021013 204 0.5+ 0.0 010827 699 (0.9+ 2.4-) 011114 402 0.4- 0.3+ 021013 204 0.5+ 0.3+ 010827 699 1.0- 1.6+ 011114 402 0.4- 0.5+ 021014 360 0.2- 0.3- 010827 699 1.7+ 0.1- 011120 204 (3.8- 0.4+) 021014 360 1.1- 0.0 011015 644 0.4- 0.5- 011120 204 0.8+ 0.3- 021014 360 0.2+ 0.2- 011015 644 0.3+ 0.7- 011121 360 1.0+ 0.3+ 021029 644 0.7- 0.7+ 011015 644 0.0 1.0- 011121 360 1.0+ 0.4- 021029 644 0.1- 1.0+ 011015 046 (3.3+ 0.5+) 011121 360 0.9+ 0.7- 021029 644 0.2- 1.3+ 011015 046 0.2- 1.9- 2002/ 021106 360 0.2- 0.1- 011016 644 0.3+ 0.4+ 020111 360 0.3- 0.3- 021106 360 0.4+ 0.6- 011016 644 0.1- 0.2- 020111 360 0.7+ 1.5+ 021106 360 0.3- 0.2- 011016 644 0.5+ 0.6+ 020111 360 0.2+ 0.3+ 021121 644 0.3- 0.6+ 011018 644 0.2+ 0.5+ 020117 568 0.3+ 1.0- 021121 644 0.3- 0.4+ 011018 644 0.2+ 0.6+ 020117 568 0.5+ 0.9- 021121 644 0.1- 0.2+ 011018 644 0.0 0.7+ 020117 568 0.3- 0.3+ 021122 644 0.4- 0.3+ 011021 644 1.3- 0.0 020117 568 0.1+ 0.7- 021122 644 0.5- 0.4+ 011021 644 0.8- 0.2+ 020117 568 0.0 0.5- 021122 644 0.2- 0.9+ 011023 644 (0.6+ 2.2+) 020117 568 0.7+ 0.1- 2003/ 011023 644 (0.8+ 2.7+) 020817 568 0.0 0.1+ 031029 699 0.6+ 0.7- 011023 644 1.1+ 1.6+ 020817 568 0.0 0.1+ 031029 699 (1.2+ 2.3-) 011023 402 0.3- 0.2- 020817 568 0.2- 0.1+ 031029 691 0.1- 0.3- 011023 402 0.2- 1.0- 020912 360 0.0 0.9- 031029 699 1.7+ 0.1+ 011023 402 (0.5+ 2.3-) 020912 360 0.4+ 0.2- 031029 691 0.6- 0.2- 011025 402 0.7+ 0.7- 020912 360 0.4- 0.8- 031029 699 (2.4+ 1.8-) 011025 402 0.6- 0.6- 021005 360 0.1+ 0.3+ 031029 691 0.1+ 0.0 011025 402 0.2- 0.2+ 021005 360 0.0 0.2- 031102 204 0.2+ 0.3- 011029 568 0.4- 0.1- 021009 699 0.5+ 0.2- 031102 204 0.8+ 0.2+ 011029 568 0.5- 0.3- 021009 699 0.1+ 0.2- 031117 360 0.5- 0.1- 011029 568 0.1- 0.1+ 021009 699 0.0 0.5- 031117 360 0.3+ 0.4- 011029 568 0.3- 0.2+ 021009 644 0.5- 0.1+ 031117 360 0.9- 0.1- 011029 568 0.0 0.1- 021009 699 0.7+ 0.0 031123 360 0.2- 0.2- 011029 568 0.4- 0.1+ 021009 644 0.1- 0.2+ 031123 360 0.4- 0.1+ 011029 568 0.1- 0.1+ 021009 644 0.3- 0.2+ ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 2003 Dec. 10