Nakano Note (Nakano wa Kangaeru noda) NK 3278 P/PANSTARRS (2017 A2 = 2011 A5)
The following improved orbital elements, by S. Nakano, are from 27 observations 2011 to 2017. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.39 arc second. Epoch = 2016 June 21.0 TT T = 2016 June 22.15123 +/- 0.00404 (m.e.) TT Peri. = 133.75794 +/- 0.00164 Node = 313.74712 +/- 0.00005 (2000.0) Inc. = 17.58455 +/- 0.00004 q = 2.2121694 +/- 0.0000212 AU e = 0.3009758 +/- 0.0000069 a = 3.1646535 +/- 0.0000138 AU n' = 0.17507125 +/- 0.00000114 P = 5.630 +/- 0.0000368 years T = 2010 Nov. 1.76137 TT Epoch = 2010 Nov. 20.0 TT Peri. = 133.44754 e = 0.3010362 Node = 313.80780 (2000.0) a = 3.1638424 AU Inc. = 17.58406 n'= 0.17513857 q = 2.2114114 AU P = 5.628 years The predicted orbit for the 2022 return is as follows: T = 2022 Feb. 12.52658 TT Epoch = 2022 Mar. 2.0 TT Peri. = 135.66599 e = 0.3067975 Node = 312.94194 (2000.0) a = 3.1504670 AU Inc. = 17.74017 n'= 0.17625509 q = 2.1839117 AU P = 5.592 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2011/ 161204 G96 0.2- 0.1- 170103 568 0.2+ 0.1- 110113 G96 0.3- 0.0 161204 G96 0.2- 0.1+ 170103 568 0.1+ 0.1- 110113 G96 0.2- 0.1- 161204 G96 0.1+ 1.1- 170104 W96 1.6- 0.6+ 110113 G96 0.3- 0.2+ 161224 G96 0.6- 0.3+ 170104 W96 1.7- 0.8+ 110113 G96 0.1+ 0.3+ 161224 G96 1.1- 0.0 170104 W96 (2.4- 1.4+) 110130 F51 0.0 0.0 2017/ 170105 C10 1.6- 0.7+ 110130 F51 0.1+ 0.0 170102 F51 0.1+ 0.2+ 170105 C10 1.7- 1.6+ 110130 F51 0.0 0.0 170102 F51 0.1+ 0.1- 170105 C10 (2.2- 1.7+) 110130 F51 0.0 0.0 170102 F51 0.2+ 0.0 170105 Q62 0.0 0.2- 2016/ 170102 F51 0.0 0.0 170105 Q62 0.2+ 0.1- 161204 G96 0.4- 0.3+ 170103 568 0.2+ 0.1- ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2017 Jan. 9