Nakano Note (Nakano wa Kangaeru noda) NK 3778 P/2018 X3 (PANSTARRS)
The following improved orbital elements, by S. Nakano, are from 33 observations 2018 Oct. 4 to 2019 Jan. 4. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.28 arc second. See an orbit in HICQ 2019. Epoch = 2018 Dec. 28.0 TT T = 2018 Dec. 30.80867 +/- 0.00457 (m.e.) TT Peri. = 359.83717 +/- 0.00138 Node = 78.92475 +/- 0.00006 (2000.0) Inc. = 43.36946 +/- 0.00039 q = 2.6988749 +/- 0.0000118 AU e = 0.7826790 +/- 0.0000167 a = 12.4188435 +/- 0.0009539 AU n' = 0.02252072 +/- 0.00000260 P = 43.764 +/- 0.0050419 years (+/- 1.84 days) The predicted orbit for the 2062 return is as follows: T = 2062 Sept. 9.55077 TT Epoch = 2062 Sept. 8.0 TT Peri. = 359.84687 e = 0.7824786 Node = 78.92617 (2000.0) a = 12.4296992 AU Inc. = 43.36189 n'= 0.02249123 q = 2.7037261 AU P = 43.822 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2018/ 181214 H01 0.0 0.0 181215 106 0.1+ 0.5+ 181004 F52 0.1- 0.0 181214 H01 0.1- 0.0 181215 106 0.3+ 0.9- 181004 F52 0.1+ 0.1- 181214 H01 0.1+ 0.0 181216 691 0.2- 0.3+ 181102 F52 0.2+ 0.2+ 181214 H01 0.1+ 0.1+ 181216 691 0.1+ 0.0 181102 F52 0.0 0.1- 181214 L01 0.5+ 0.6- 181216 691 0.3+ 0.6+ 181102 F52 0.2- 0.0 181214 L01 0.1+ 0.3+ 181228 Q62 0.2- 0.3+ 181212 F51 0.0 0.1+ 181214 L01 0.3- 0.4+ 181228 Q62 0.1- 0.5+ 181212 F51 0.0 0.0 181215 204 0.2+ 0.3- 181228 Q62 0.2- 0.5+ 181212 F51 0.0 0.0 181215 204 0.1- 0.2- 2019/ 181214 568 0.1- 0.1- 181215 204 0.3- 0.0 190104 H06 0.3+ 0.2+ 181214 568 0.0 0.1- 181215 595 0.3+ 0.2- 190104 H06 0.0 0.3- 181214 568 0.1- 0.0 181215 595 0.2+ 0.9- ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2019 Feb. 3