OAA computing section circular NK 821 P/2001 K1 (NEAT)
The following improved orbital elements, by S. Nakano, are from 73 observations 2001 Feb. 2 to July 22. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.67 arc second. Epoch = 2000 Oct. 23.0 TT T = 2000 Nov. 6.88701 +/- 0.01122 (m.e.) TT Peri. = 94.64566 +/- 0.00498 Node = 84.83833 +/- 0.00040 (2000.0) Inc. = 16.91273 +/- 0.00023 q = 2.4705375 +/- 0.0000696 AU e = 0.3572965 +/- 0.0000290 a = 3.8439768 +/- 0.0000532 AU n' = 0.13077747 +/- 0.00000271 P = 7.537 +/- 0.0001564 years (+/- 0.06 day) The predicted orbit for the 2008 return is as follows: T = 2008 May 27.04030 TT Epoch = 2008 May 14.0 TT Peri. = 94.90831 e = 0.3576990 Node = 84.75313 (2000.0) a = 3.8434684 AU Inc. = 16.91349 n'= 0.13080342 q = 2.4686635 AU P = 7.535 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2001/ 010521 046 1.6- 0.0 010526 170 (3.4- 1.5-) 010202 699 0.4- 0.1- 010521 046 1.1- 0.3+ 010526 704 0.1+ 0.1+ 010202 699 0.9- 0.6+ 010521 046 0.7- 0.8+ 010526 704 0.4+ 0.5+ 010202 699 0.5+ 0.2+ 010521 046 0.2+ 0.4- 010526 704 1.3+ 0.2+ 010202 699 (3.3- 2.1+) 010521 163 1.9+ 0.2- 010526 704 0.2+ 1.1+ 010415 704 0.3+ 0.5+ 010521 557 0.4- 0.0 010526 704 0.2- 0.0 010415 704 0.1- 0.0 010521 163 1.9+ 0.1+ 010526 704 1.4+ 0.2+ 010415 704 0.5- 0.3- 010521 163 (2.2+ 0.8+) 010526 704 0.5- 1.1- 010415 704 0.6+ 0.6- 010521 557 0.4- 0.2+ 010526 704 1.4- 0.2- 010415 704 0.1- 0.4+ 010521 163 0.8- 0.2+ 010528 402 1.2- 0.2+ 010425 699 (3.1- 0.3+) 010521 557 0.3- 0.3+ 010528 402 0.4+ 0.1+ 010425 699 (3.1- 0.1-) 010521 557 0.3- 0.2+ 010528 402 0.3+ 0.4+ 010425 699 (3.3- 0.6+) 010521 046 0.4+ 0.7+ 010529 170 (2.1- 0.9-) 010425 699 (4.1- 0.2+) 010521 046 0.2+ 0.9+ 010530 170 (2.5- 0.7-) 010518 699 (3.2- 0.5+) 010521 046 0.5- 0.2+ 010611 360 0.2- 0.4+ 010518 699 (2.6- 0.3-) 010521 046 0.5+ 0.2+ 010611 360 0.4+ 0.3+ 010518 699 (5.2- 1.2+) 010522 704 1.2+ 0.3+ 010611 360 0.6- 0.5+ 010518 699 (3.7- 0.4+) 010522 704 0.4- 1.0- 010614 204 0.4- 0.7+ 010520 608 0.3- 0.1- 010522 704 1.0- 0.2+ 010614 204 0.1- 0.1+ 010520 608 0.5+ 0.4- 010522 704 0.8- 0.6+ 010621 170 1.3+ 0.4- 010520 608 0.8+ 0.3- 010522 704 1.6- 0.4- 010621 170 (2.3- 0.8+) 010521 608 0.0 0.5- 010522 608 1.6+ 1.5- 010622 118 1.4+ 0.5- 010521 422 0.6+ 0.6- 010522 608 0.1- 1.2- 010622 118 0.2+ 0.0 010521 608 0.4- 0.9- 010522 608 0.4- 0.2- 010623 504 1.8- 0.5- 010521 422 0.2+ 0.2- 010522 557 0.8- 0.1- 010623 504 0.3- 0.5+ 010521 422 0.4+ 0.6- 010522 557 0.7- 0.2+ 010623 504 0.9+ 0.4+ 010521 608 0.5- 0.9- 010525 402 0.6+ 0.2- 010722 360 0.7- 0.1+ 010521 046 0.3- 0.1+ 010525 402 0.0 0.7+ 010722 360 1.1- 0.4+ 010521 046 1.4+ 0.0 010525 402 0.5+ 0.1- 010722 360 0.1- 0.2- 010521 163 1.0+ 0.1- 010526 170 (3.0- 0.6+) ( ) -------- Rejected Obs.
Director, Computing Section Late edition Syuichi Nakano 2001 Nov. 3