Nakano Note (Nakano wa Kangaeru noda) NK 2909 P/2014 W1 (PANSTARRS)

The following improved orbital elements, by S. Nakano, are from 50 observations 2014 Nov. 17 to 2015 Feb. 14. 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 = 2014 Aug. 11.0 TT T = 2014 Aug. 1.10920 +/- 0.03315 (m.e.) TT Peri. = 150.35670 +/- 0.00961 Node = 247.24877 +/- 0.00004 (2000.0) Inc. = 8.80881 +/- 0.00021 q = 2.6621750 +/- 0.0000658 AU e = 0.3962542 +/- 0.0000415 a = 4.4094303 +/- 0.0000731 AU n' = 0.10644625 +/- 0.00000265 P = 9.259 +/- 0.0002302 years (+/- 0.08 day) The predicted orbit for the 2023 return is as follows: T = 2023 Dec. 18.33811 TT Epoch = 2023 Dec. 2.0 TT Peri. = 152.03852 e = 0.3904433 Node = 246.18233 (2000.0) a = 4.4764256 AU Inc. = 8.83906 n'= 0.10406556 q = 2.7286353 AU P = 9.471 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2014/ 141119 F51 0.1+ 0.1+ 141127 F51 0.1+ 0.1- 141117 F51 0.0 0.0 141119 F51 0.0 0.0 141127 F51 0.2+ 0.0 141117 F51 0.1- 0.1- 141119 F51 0.2- 0.1- 141127 F51 0.1+ 0.1- 141117 F51 0.1- 0.0 141119 F51 0.1- 0.3+ 141129 372 1.9+ 0.4+ 141117 F51 0.1- 0.1- 141120 958 0.1- 0.4+ 141129 372 1.8+ 0.6+ 141118 711 0.1- 0.1+ 141120 958 0.1+ 0.1- 141210 G96 0.5+ 0.0 141118 711 0.1- 0.0 141120 W96 0.4+ 0.0 141210 G96 0.3+ 0.4+ 141118 711 0.2- 0.1+ 141120 W96 0.1- 0.2- 141210 G96 0.2+ 0.2+ 141118 H01 0.1+ 0.0 141120 W96 0.2- 1.9+ 141213 F51 0.0 0.1- 141118 H01 0.2+ 0.0 141120 W96 0.9- 0.2- 141213 F51 0.1- 0.0 141118 H01 0.1+ 0.1+ 141120 W96 1.3- 0.3+ 141213 F51 0.0 0.0 141118 568 0.1+ 0.0 141122 349 (2.0- 2.1-) 141213 F51 0.1- 0.1- 141118 568 0.1+ 0.0 141122 349 (0.9- 3.1-) 2015/ 141118 568 0.1+ 0.0 141126 703 1.0- 0.5- 150214 G45 0.3- 0.7- 141118 H01 0.2+ 0.0 141126 703 0.5- 0.7- 150214 G45 0.2+ 0.3+ 141118 Q62 0.0 0.3+ 141126 703 0.5+ 0.4- 150214 G45 0.8- 1.3+ 141118 Q62 0.2+ 0.5+ 141126 703 0.8- 1.1+ 150214 G45 0.8+ 0.0 141118 Q62 0.3- 0.7+ 141127 F51 0.1+ 0.2- 150214 G45 0.1- 0.1+ ( ) -------- Rejected Obs.

Associate of the CBAT Syuichi Nakano 2015 May 17

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