OAA computing section circular NK 899 P/2001 T4 (NEAT)
The following improved orbital elements, by S. Nakano, are from 77 observations 2001 Aug. 27 to 2002 Nov. 22. 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. Epoch = 2002 May 6.0 TT T = 2002 May 20.87468 +/- 0.38402 (m.e.) TT Peri. = 321.86554 +/- 0.01785 Node = 64.49986 +/- 0.00035 (2000.0) Inc. = 15.36296 +/- 0.00011 q = 8.5642279 +/- 0.0000466 AU e = 0.3844166 +/- 0.0000288 a = 13.9123770 +/- 0.0000470 AU n' = 0.01899337 +/- 0.00000010 P = 51.892 +/- 0.0002630 years (+/- 0.10 day) The predicted orbit for the 2053 return is as follows: T = 2053 Nov. 27.14417 TT Epoch = 2053 Dec. 4.0 TT Peri. = 322.09008 e = 0.3798451 Node = 64.29513 (2000.0) a = 13.7842951 AU Inc. = 15.37301 n'= 0.01925871 q = 8.5483977 AU P = 51.177 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 0.2- 0.1+ 020912 360 0.4- 0.9- 010827 699 (0.9+ 5.4-) 011029 568 0.4- 0.2+ 021005 360 0.2+ 0.2+ 010827 699 (1.0+ 2.3-) 011029 568 0.0 0.1- 021005 360 0.1+ 0.3- 010827 699 0.9- 1.7+ 011029 568 0.4- 0.1+ 021009 699 0.6+ 0.4- 010827 699 1.8+ 0.0 011029 568 0.1- 0.1+ 021009 699 0.2+ 0.3- 011015 644 0.4- 0.5- 011029 568 0.6- 0.1- 021009 699 0.0 0.6- 011015 644 0.3+ 0.7- 011114 402 0.9- 0.6+ 021009 644 0.4- 0.0 011015 644 0.0 1.0- 011114 402 0.5- 0.3+ 021009 699 0.8+ 0.1- 011015 046 (3.2+ 0.6+) 011114 402 0.5- 0.5+ 021009 644 0.0 0.1+ 011015 046 0.3- 1.8- 011120 204 (3.8- 0.4+) 021009 644 0.2- 0.1+ 011016 644 0.3+ 0.4+ 011120 204 0.8+ 0.2- 021013 204 0.4+ 0.7+ 011016 644 0.2- 0.1- 011121 360 0.9+ 0.3+ 021013 204 0.5+ 0.1- 011016 644 0.5+ 0.6+ 011121 360 0.9+ 0.4- 021013 204 0.5+ 0.2+ 011018 644 0.1+ 0.6+ 011121 360 0.8+ 0.7- 021014 360 0.1- 0.4- 011018 644 0.2+ 0.6+ 2002/ 021014 360 1.0- 0.2- 011018 644 0.0 0.8+ 020111 360 0.3- 0.3- 021014 360 0.2+ 0.3- 011021 644 1.3- 0.0 020111 360 0.7+ 1.5+ 021029 644 0.7- 0.6+ 011021 644 0.8- 0.2+ 020111 360 0.2+ 0.4+ 021029 644 0.0 0.8+ 011023 644 (0.6+ 2.2+) 020117 568 0.3+ 1.0- 021029 644 0.1- 1.2+ 011023 644 (0.8+ 2.8+) 020117 568 0.5+ 0.8- 021106 360 0.2- 0.2- 011023 644 1.1+ 1.6+ 020117 568 0.3- 0.3+ 021106 360 0.5+ 0.7- 011023 402 0.3- 0.2- 020117 568 0.2+ 0.6- 021106 360 0.3- 0.4- 011023 402 0.3- 0.9- 020117 568 0.0 0.4- 021121 644 0.3- 0.4+ 011023 402 (0.5+ 2.3-) 020117 568 0.7+ 0.0 021121 644 0.2- 0.3+ 011025 402 0.6+ 0.7- 020817 568 0.1+ 0.1+ 021121 644 0.0 0.1+ 011025 402 0.6- 0.6- 020817 568 0.2+ 0.1+ 021122 644 0.3- 0.1+ 011025 402 0.2- 0.2+ 020817 568 0.1- 0.1+ 021122 644 0.4- 0.2+ 011029 568 0.4- 0.0 020912 360 0.1+ 0.9- 021122 644 0.2- 0.7+ 011029 568 0.5- 0.3- 020912 360 0.5+ 0.2- ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 2002 Dec. 11