OAA computing section circular NK 989 P/2003 F2 (NEAT)
The following improved orbital elements, by S. Nakano, are from 67 observations 2003 Mar. 27 to Apr. 26. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.61 arc second. Epoch = 2003 May 1.0 TT T = 2003 Apr. 12.78383 +/- 0.90644 (m.e.) TT Peri. = 191.09333 +/- 0.22723 Node = 359.04477 +/- 0.00838 (2000.0) Inc. = 11.63558 +/- 0.01661 q = 2.9809789 +/- 0.0019932 AU e = 0.5414341 +/- 0.0003041 a = 6.5006558 +/- 0.0009418 AU n' = 0.05946594 +/- 0.00001292 P = 16.574 +/- 0.0036017 years (+/- 1.32 day) The predicted orbit for the 2019 return is as follows: T = 2019 Nov. 5.75538 TT Epoch = 2019 Nov. 13.0 TT Peri. = 191.30099 e = 0.5411615 Node = 359.10777 (2000.0) a = 6.4810119 AU Inc. = 11.63787 n'= 0.05973651 q = 2.9737381 AU P = 16.499 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2003/ 030330 734 1.1- 0.4- 030401 649 0.3- 0.2- 030327 644 0.0 0.3+ 030330 734 0.2+ 0.1- 030401 711 1.6- 0.4- 030327 644 0.6+ 0.3+ 030330 673 0.9+ 0.3+ 030401 711 1.5- 0.6- 030327 644 0.2+ 0.4+ 030330 673 0.7- 0.2- 030401 711 0.3- 0.1- 030328 809 0.2+ 0.1- 030330 673 0.0 0.6- 030401 176 0.4- 0.6+ 030328 809 0.1+ 0.1- 030330 673 0.9+ 0.8- 030401 176 0.4- 0.3+ 030328 809 0.1+ 0.1- 030330 673 0.1- 1.1- 030401 176 0.4- 0.1+ 030328 246 1.3+ 0.6- 030330 448 0.2+ 0.1+ 030401 176 0.2- 0.2- 030328 246 0.6+ 0.8- 030330 448 0.1+ 0.7+ 030406 360 0.2+ 0.1+ 030328 246 0.5- 1.1+ 030330 448 0.5+ 0.7+ 030406 360 0.2- 0.2+ 030328 246 0.2+ 0.2+ 030331 711 1.8+ 0.5+ 030406 360 0.5- 0.1+ 030328 246 0.8- 0.9+ 030331 711 0.7+ 0.7- 030407 691 0.7+ 0.1- 030328 557 0.6- 1.1- 030331 711 0.3- 0.5+ 030407 691 0.5+ 0.3+ 030329 557 0.2- 0.5+ 030331 673 0.9+ 0.0 030407 691 0.5+ 0.1+ 030329 557 1.4- 1.4- 030331 673 0.6+ 0.1+ 030409 246 0.6+ 0.6- 030329 557 1.6- 0.8- 030331 673 0.0 0.1+ 030409 246 0.4- 0.5+ 030329 809 0.1+ 0.1+ 030331 246 0.3- 0.0 030409 246 0.4+ 0.4- 030329 809 0.2+ 0.1+ 030331 246 0.3- 1.5+ 030409 246 0.6+ 0.3+ 030329 809 0.2+ 0.0 030331 246 0.1- 0.3+ 030409 246 1.2- 0.1+ 030329 649 0.5- 0.2- 030331 557 0.3- 0.1- 030426 691 0.2+ 0.1- 030329 649 0.6- 0.3+ 030331 557 0.5+ 0.5+ 030426 691 0.1- 0.0 030329 649 0.3+ 0.3+ 030401 649 0.1- 0.7- 030426 691 0.2- 0.1- 030330 734 1.9+ 0.7+ 030401 649 0.2+ 0.3- ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 2003 Oct. 31