OAA computing section circular NK 887 P/2002 EJ57 (LINEAR)
The following improved orbital elements, by S. Nakano, are from 52 observations 2002 Mar. 10 to May 12. 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 = 2002 Jan. 6.0 TT T = 2001 Dec. 19.22433 +/- 0.17888 (m.e.) TT Peri. = 166.92233 +/- 0.05796 Node = 330.38381 +/- 0.00192 (2000.0) Inc. = 4.96937 +/- 0.00051 q = 2.6358166 +/- 0.0006067 AU e = 0.5940695 +/- 0.0000792 a = 6.4932712 +/- 0.0003017 AU n' = 0.05956742 +/- 0.00000415 P = 16.546 +/- 0.0011532 years (+/- 0.42 day) The predicted orbit for the 2018 return is as follows: T = 2018 June 19.84026 TT Epoch = 2018 June 11.0 TT Peri. = 167.04287 e = 0.5934310 Node = 330.43258 (2000.0) a = 6.4625342 AU Inc. = 4.97694 n'= 0.05999289 q = 2.6274658 AU P = 16.429 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2002/ 020313 644 0.1- 0.7+ 020501 966 0.5- 0.4+ 020310 704 0.7- 0.9- 020313 644 0.3- 0.5+ 020501 966 0.4- 0.1+ 020310 704 0.0 0.6- 020313 644 0.1+ 0.3+ 020502 413 0.8- 0.1+ 020310 704 0.4- 0.1- 020315 704 0.8+ 0.1- 020502 413 0.6- 0.0 020310 704 1.0+ 1.9+ 020315 704 0.2- 1.3- 020502 413 0.7- 0.1- 020312 704 0.1- 0.2+ 020315 704 0.7+ 1.7- 020502 413 0.8- 0.2+ 020312 704 0.5- 0.9- 020315 704 0.7- 0.4+ 020502 413 0.4- 0.0 020312 704 0.3- 1.6- 020315 704 0.6- 0.7- 020502 413 0.6- 0.3+ 020312 704 0.1- 0.3+ 020320 333 0.3- 0.9- 020505 699 1.5+ 0.4- 020312 704 0.0 1.8+ 020320 333 0.3- 1.5- 020505 699 0.4+ 0.6+ 020312 704 0.4+ 0.2- 020320 333 0.5+ 0.2- 020505 699 1.4+ 0.6+ 020312 704 0.3+ 0.7+ 020501 246 0.0 0.2- 020505 699 0.8+ 0.2+ 020312 704 1.4+ 1.9+ 020501 246 0.0 0.1+ 020506 204 (3.3+ 0.7-) 020313 704 0.3- 0.2- 020501 246 0.7+ 0.1+ 020506 204 0.3+ 1.2- 020313 704 0.1- 0.1+ 020501 246 0.3+ 0.6+ 020512 360 0.4- 0.5- 020313 704 0.2- 0.2- 020501 246 0.5- 0.4- 020512 360 0.0 0.5+ 020313 704 0.3+ 1.0+ 020501 246 0.3+ 0.3+ 020512 360 0.0 0.4- 020313 704 0.0 0.5+ 020501 246 0.0 0.5- 020512 360 0.2- 0.4+ ( ) -------- Rejected Obs.
Director, Computing Section Late edition Syuichi Nakano 2002 May 15