Nakano Note (Nakano wa Kangaeru noda) NK 2227 P/2011 FR143 (Lemmon)
The following improved orbital elements, by S. Nakano, are from 54 observations 2011 Mar. 5 to 2012 Apr. 14. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.43 arc second. Epoch = 2011 Mar. 20.0 TT T = 2011 Mar. 10.73647 +/- 0.02272 (m.e.) TT Peri. = 349.94019 +/- 0.00380 Node = 191.02265 +/- 0.00006 (2000.0) Inc. = 16.01365 +/- 0.00003 q = 3.7355592 +/- 0.0000573 AU e = 0.4529887 +/- 0.0000248 a = 6.8290346 +/- 0.0000478 AU n' = 0.05522874 +/- 0.00000058 P = 17.846 +/- 0.0001873 years (+/- 0.07 day) The predicted orbit for the 2029 return is as follows: T = 2029 Jan. 29.07105 TT Epoch = 2029 Jan. 24.0 TT Peri. = 349.33691 e = 0.4570333 Node = 190.88288 (2000.0) a = 6.9368671 AU Inc. = 15.96421 n'= 0.05394597 q = 3.7664879 AU P = 18.270 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2011/ 110411 H06 0.1+ 0.0 110426 704 0.3+ 0.1- 110305 691 0.4- 0.3- 110411 H06 0.0 0.1- 110426 704 0.0 1.0+ 110305 691 0.4+ 0.2+ 110412 H06 0.0 0.2- 2012/ 110305 691 0.5- 0.8+ 110412 H06 0.2+ 0.2- 120329 204 0.3- 0.4- 110309 691 0.5- 0.3+ 110412 H06 0.1- 0.2+ 120329 204 0.8- 0.2+ 110309 691 0.2+ 0.2+ 110413 G96 0.2- 0.2- 120329 695 0.2- 0.2- 110309 691 0.0 0.2- 110413 G96 0.0 0.2- 120329 695 0.3- 0.3- 110329 G96 0.2- 0.0 110413 G96 0.1+ 0.2- 120331 695 0.0 0.5+ 110329 G96 0.1- 0.1+ 110413 G96 0.3- 0.4- 120331 695 0.1+ 0.6+ 110329 G96 0.1- 0.0 110426 703 0.2- 0.3+ 120331 695 0.2+ 0.4- 110331 F51 0.1- 0.0 110426 703 0.2- 0.8+ 120331 695 0.5+ 0.1+ 110331 F51 0.0 0.0 110426 703 1.3- 1.6+ 120406 H21 0.3- 0.5+ 110331 F51 0.1+ 0.0 110426 703 0.7- 0.6+ 120406 H21 0.6- 0.1+ 110331 F51 0.1+ 0.0 110426 G96 0.0 0.3- 120406 H21 0.3- 0.0 110405 G92 0.3- 0.3- 110426 G96 0.2+ 0.3- 120411 F65 0.3+ 0.7- 110405 G92 0.3+ 0.4- 110426 G96 0.2- 0.3- 120411 F65 0.4+ 0.9- 110405 G92 0.2- 0.3- 110426 G96 0.0 0.3- 120414 372 0.9- 0.3- 110405 G92 1.3+ 0.6- 110426 704 0.0 0.6- 120414 372 0.7- 0.2- 110411 H06 0.4+ 0.0 110426 704 0.9+ 0.1+ ( ) -------- Rejected Obs.
Associate of Central Bureau for Astronomical Telegrams Syuichi Nakano 2012 Apr. 15