Nakano Note (Nakano wa Kangaeru noda) NK 2406 P/2012 WA34 (Lemmon-PANSTARRS)
The following improved orbital elements, by S. Nakano, are from 30 observations 2011 Sept. 26 to 2013 Jan. 18. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.38 arc second. Epoch = 2013 Jan. 28.0 TT T = 2013 Jan. 24.75375 +/- 0.00672 (m.e.) TT Peri. = 353.16108 +/- 0.00147 Node = 94.52350 +/- 0.00008 (2000.0) Inc. = 6.11886 +/- 0.00002 q = 3.1733918 +/- 0.0000230 AU e = 0.3396871 +/- 0.0000059 a = 4.8058906 +/- 0.0000115 AU n' = 0.09354989 +/- 0.00000034 P = 10.536 +/- 0.0000380 years The predicted orbit for the 2023 return is as follows: T = 2023 July 8.84076 TT Epoch = 2023 June 25.0 TT Peri. = 356.64606 e = 0.3434463 Node = 93.55353 (2000.0) a = 4.6778638 AU Inc. = 6.08273 n'= 0.09741654 q = 3.0712686 AU P = 10.117 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2011/ 121126 G96 0.4+ 0.2- 130108 568 0.0 0.0 110926 F51 0.0 0.1+ 121126 G96 0.3- 0.0 130108 568 0.0 0.1- 110926 F51 0.1+ 0.1+ 121203 G96 0.2- 0.2+ 130109 568 0.1- 0.0 110926 F51 0.1- 0.1- 121203 G96 1.0- 0.1- 130109 568 0.1+ 0.1- 2012/ 121203 G96 1.2- 0.6- 130109 568 0.1- 0.1- 121107 F51 0.2+ 0.1+ 121203 G96 0.0 0.5+ 130116 H06 0.2- 0.7+ 121107 F51 0.1- 0.2- 2013/ 130116 H06 1.0- 0.3+ 121125 F51 0.1+ 0.1+ 130107 F51 0.2+ 0.2+ 130118 G96 1.2+ 0.4+ 121125 F51 0.1+ 0.1+ 130107 F51 0.3+ 0.0 130118 G96 0.7+ 0.2- 121126 G96 0.4+ 0.1+ 130107 F51 0.3- 0.0 130118 G96 0.2+ 0.7+ 121126 G96 0.3- 0.3+ 130108 568 0.1- 0.1- 130118 G96 0.1- 0.2- ( ) -------- Rejected Obs.
Associate of Central Bureau for Astronomical Telegrams Syuichi Nakano 2013 Feb. 3