Nakano Note (Nakano wa Kangaeru noda) NK 1779 P/2006 F4 (Spacewatch)
The following improved orbital elements, by S. Nakano, are from 46 observations 2006 Mar. 26 to May 31. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.68 arc second. See an orbit on YC 2512. Epoch = 2006 Apr. 15.0 TT T = 2006 May 3.57163 +/- 0.05398 (m.e.) TT Peri. = 31.37269 +/- 0.01963 Node = 184.09713 +/- 0.00253 (2000.0) Inc. = 12.38623 +/- 0.00157 q = 2.3397983 +/- 0.0001507 AU e = 0.3370805 +/- 0.0000117 a = 3.5295364 +/- 0.0000668 AU n' = 0.14863722 +/- 0.00000422 P = 6.631 +/- 0.0001882 years (+/- 0.07 day) The predicted orbit for the 2012 return is as follows: T = 2012 Dec. 13.91912 TT Epoch = 2012 Dec. 19.0 TT Peri. = 31.04195 e = 0.3366552 Node = 184.06282 (2000.0) a = 3.5306213 AU Inc. = 12.38024 n'= 0.14856871 q = 2.3420194 AU P = 6.634 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2006/ 060330 474 0.8+ 1.0- 060427 703 0.7- 0.0 060326 691 0.2- 0.2- 060330 474 0.1+ 0.2- 060427 703 1.0- 0.6- 060326 691 0.1+ 0.1- 060406 703 1.6+ 0.9+ 060427 703 0.6- 1.5- 060326 691 0.3+ 0.1- 060406 703 (0.9+ 2.6-) 060430 213 1.1+ 0.1+ 060328 J95 0.4- 1.7+ 060406 703 0.3- 0.2- 060430 213 0.9+ 0.0 060328 J95 0.8- 0.2- 060406 703 (2.0- 0.3-) 060430 213 0.8+ 0.0 060328 D35 0.1- 0.8+ 060409 673 0.9+ 0.5- 060505 G96 0.3- 0.1+ 060328 D35 0.2- 0.7+ 060409 673 0.6+ 0.4- 060505 G96 0.0 0.1- 060328 D35 0.0 0.6+ 060409 673 (3.8- 6.3+) 060505 G96 0.2- 0.3- 060329 734 0.1+ 0.9+ 060409 673 1.0+ 0.1- 060505 G96 0.4- 0.3- 060329 734 0.8- 1.3- 060409 673 0.5+ 0.0 060519 213 (2.8+ 0.1-) 060329 734 (3.2- 3.3-) 060419 703 0.1- 0.6+ 060519 213 1.7- 0.3- 060329 474 0.5+ 0.3+ 060419 703 1.3- 0.4+ 060521 215 0.1- 0.5+ 060329 474 0.3+ 0.0 060419 703 0.9- 1.0- 060527 130 1.5+ 0.7- 060329 474 0.7+ 0.5- 060419 703 0.4- 0.1+ 060531 561 0.5+ 0.6+ 060330 850 1.1- 0.0 060423 204 0.1- 0.0 060531 561 0.4+ 1.0+ 060330 850 (2.2+ 0.2+) 060423 204 0.7- 0.3- 060531 561 0.6+ 0.1+ 060330 474 0.6+ 0.3- 060427 703 1.1- 0.9+ ( ) -------- Rejected Obs.
Managing Director of the Oriental Astronomical Association Syuichi Nakano 2009 Apr. 23