Nakano Note (Nakano wa Kangaeru noda) NK 4450 P/2019 A3 (PANSTARRS)
The following improved orbital elements, by S. Nakano, are from 41 observations 2018 Aug. 8 to 2021 Mar. 14. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.36 arc second. See the previous orbit in NK 3779. Epoch = 2018 July 21.0 TT T = 2018 Aug. 1.80067 +/- 0.00233 (m.e.) TT Peri. = 325.47298 +/- 0.00081 Node = 31.33324 +/- 0.00003 (2000.0) Inc. = 15.36734 +/- 0.00005 q = 2.3134371 +/- 0.0000072 AU e = 0.2648331 +/- 0.0000007 a = 3.1468191 +/- 0.0000102 AU n' = 0.17656166 +/- 0.00000086 P = 5.582 +/- 0.0000271 years The predicted orbit for the 2024 return is as follows: T = 2024 Mar. 2.64640 TT Epoch = 2024 Feb. 20.0 TT Peri. = 325.71311 e = 0.2661310 Node = 31.29327 (2000.0) a = 3.1438504 AU Inc. = 15.37505 n'= 0.17681181 q = 2.3071744 AU P = 5.574 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2018/ 181113 F52 0.0 0.4+ 190108 658 0.1+ 0.1+ 180808 F51 0.2- 0.1- 181113 F52 0.1- 0.5- 190108 658 0.4+ 0.0 180808 F51 0.1+ 0.3+ 181113 F52 0.1- 0.1- 190108 658 0.2- 0.1- 180808 F51 0.2+ 0.1+ 2019/ 190110 568 0.1- 0.0 180808 F51 0.2+ 0.1- 190103 F51 0.2+ 0.1+ 190110 568 0.1- 0.0 180811 F51 0.0 0.3+ 190103 F51 0.2+ 0.1+ 190110 568 0.2- 0.1- 180811 F51 0.1- 0.2- 190103 F51 0.0 0.1- 190124 H06 1.5+ 0.4+ 180811 F51 0.1+ 0.2+ 190104 568 0.0 0.1+ 190124 H06 0.9+ 0.2+ 180811 F51 0.0 0.1+ 190104 568 0.1+ 0.0 2021/ 180821 F51 0.0 0.0 190104 568 0.0 0.0 210308 I11 0.4+ 0.5+ 180821 F51 0.3- 0.0 190106 L01 0.5+ 0.8+ 210308 I11 0.3+ 0.4+ 181010 F52 0.2- 0.0 190106 L01 0.5+ 0.4+ 210314 I11 0.4+ 0.5+ 181010 F52 0.3+ 0.1- 190106 L01 1.3+ 0.4- 210314 I11 0.4+ 0.6+ 181010 F52 0.0 0.2- 190108 658 0.2+ 0.5+ 210314 I11 0.2+ 0.5+ 181018 F52 0.5- 0.1- 190108 658 0.1+ 0.3+ ( ) -------- Rejected Obs.
Associate of the CBAT Syuichi Nakano 2021 May 8